2010-05-30 Zoltan Varga <vargaz@gmail.com>
[mono.git] / mono / mini / mini-codegen.c
index d2177855a0f78119223dae139f8f34b5a667f0f9..7a1476fbb5ded54194a8e9a24aac6dde608a6348 100644 (file)
 #include <mono/metadata/debug-helpers.h>
 #include <mono/metadata/threads.h>
 #include <mono/metadata/profiler-private.h>
+#include <mono/metadata/mempool-internals.h>
 #include <mono/utils/mono-math.h>
 
 #include "mini.h"
 #include "trace.h"
-#include "inssel.h"
 #include "mini-arch.h"
 
-#define DEBUG(a) MINI_DEBUG(cfg->verbose_level, 2, a;)
+#ifndef MONO_MAX_XREGS
 
-static inline GSList*
-g_slist_append_mempool (MonoMemPool *mp, GSList *list, gpointer data)
-{
-       GSList *new_list;
-       GSList *last;
-       
-       new_list = mono_mempool_alloc (mp, sizeof (GSList));
-       new_list->data = data;
-       new_list->next = NULL;
-       
-       if (list) {
-               last = list;
-               while (last->next)
-                       last = last->next;
-               last->next = new_list;
-               
-               return list;
-       } else
-               return new_list;
+#define MONO_MAX_XREGS 0
+#define MONO_ARCH_CALLEE_SAVED_XREGS 0
+#define MONO_ARCH_CALLEE_XREGS 0
+
+#endif
+
+#define MONO_ARCH_BANK_MIRRORED -2
+
+#ifdef MONO_ARCH_USE_SHARED_FP_SIMD_BANK
+
+#ifndef MONO_ARCH_NEED_SIMD_BANK
+#error "MONO_ARCH_USE_SHARED_FP_SIMD_BANK needs MONO_ARCH_NEED_SIMD_BANK to work"
+#endif
+
+#define get_mirrored_bank(bank) (((bank) == MONO_REG_SIMD ) ? MONO_REG_DOUBLE : (((bank) == MONO_REG_DOUBLE ) ? MONO_REG_SIMD : -1))
+
+#define is_hreg_mirrored(rs, bank, hreg) ((rs)->symbolic [(bank)] [(hreg)] == MONO_ARCH_BANK_MIRRORED)
+
+
+#else
+
+
+#define get_mirrored_bank(bank) (-1)
+
+#define is_hreg_mirrored(rs, bank, hreg) (0)
+
+#endif
+
+
+/* If the bank is mirrored return the true logical bank that the register in the
+ * physical register bank is allocated to.
+ */
+static inline int translate_bank (MonoRegState *rs, int bank, int hreg) {
+       return is_hreg_mirrored (rs, bank, hreg) ? get_mirrored_bank (bank) : bank;
 }
 
+/*
+ * Every hardware register belongs to a register type or register bank. bank 0 
+ * contains the int registers, bank 1 contains the fp registers.
+ * int registers are used 99% of the time, so they are special cased in a lot of 
+ * places.
+ */
+
+static const int regbank_size [] = {
+       MONO_MAX_IREGS,
+       MONO_MAX_FREGS,
+       MONO_MAX_XREGS
+};
+
+static const int regbank_load_ops [] = { 
+       OP_LOADR_MEMBASE,
+       OP_LOADR8_MEMBASE,
+       OP_LOADX_MEMBASE
+};
+
+static const int regbank_store_ops [] = { 
+       OP_STORER_MEMBASE_REG,
+       OP_STORER8_MEMBASE_REG,
+       OP_STOREX_MEMBASE
+};
+
+static const int regbank_move_ops [] = { 
+       OP_MOVE,
+       OP_FMOVE,
+       OP_XMOVE
+};
+
+#define regmask(reg) (((regmask_t)1) << (reg))
+
+static const regmask_t regbank_callee_saved_regs [] = {
+       MONO_ARCH_CALLEE_SAVED_REGS,
+       MONO_ARCH_CALLEE_SAVED_FREGS,
+       MONO_ARCH_CALLEE_SAVED_XREGS,
+};
+
+static const regmask_t regbank_callee_regs [] = {
+       MONO_ARCH_CALLEE_REGS,
+       MONO_ARCH_CALLEE_FREGS,
+       MONO_ARCH_CALLEE_XREGS,
+};
+
+static const int regbank_spill_var_size[] = {
+       sizeof (mgreg_t),
+       sizeof (double),
+       16 /*FIXME make this a constant. Maybe MONO_ARCH_SIMD_VECTOR_SIZE? */
+};
+
+#define DEBUG(a) MINI_DEBUG(cfg->verbose_level, 3, a;)
+
 static inline void
 mono_regstate_assign (MonoRegState *rs)
 {
+#ifdef MONO_ARCH_USE_SHARED_FP_SIMD_BANK
+       /* The regalloc may fail if fp and simd logical regbanks share the same physical reg bank and
+        * if the values here are not the same.
+        */
+       g_assert(regbank_callee_regs [MONO_REG_SIMD] == regbank_callee_regs [MONO_REG_DOUBLE]);
+       g_assert(regbank_callee_saved_regs [MONO_REG_SIMD] == regbank_callee_saved_regs [MONO_REG_DOUBLE]);
+       g_assert(regbank_size [MONO_REG_SIMD] == regbank_size [MONO_REG_DOUBLE]);
+#endif
+
        if (rs->next_vreg > rs->vassign_size) {
                g_free (rs->vassign);
                rs->vassign_size = MAX (rs->next_vreg, 256);
-               rs->vassign = g_malloc (rs->vassign_size * sizeof (int));
+               rs->vassign = g_malloc (rs->vassign_size * sizeof (gint32));
        }
 
        memset (rs->isymbolic, 0, MONO_MAX_IREGS * sizeof (rs->isymbolic [0]));
        memset (rs->fsymbolic, 0, MONO_MAX_FREGS * sizeof (rs->fsymbolic [0]));
+
+       rs->symbolic [0] = rs->isymbolic;
+       rs->symbolic [1] = rs->fsymbolic;
+
+#ifdef MONO_ARCH_NEED_SIMD_BANK
+       memset (rs->xsymbolic, 0, MONO_MAX_XREGS * sizeof (rs->xsymbolic [0]));
+       rs->symbolic [2] = rs->xsymbolic;
+#endif
 }
 
 static inline int
@@ -98,13 +184,20 @@ mono_regstate_free_int (MonoRegState *rs, int reg)
 }
 
 static inline int
-mono_regstate_alloc_float (MonoRegState *rs, regmask_t allow)
+mono_regstate_alloc_general (MonoRegState *rs, regmask_t allow, int bank)
 {
        int i;
-       regmask_t mask = allow & rs->ffree_mask;
-       for (i = 0; i < MONO_MAX_FREGS; ++i) {
+       int mirrored_bank;
+       regmask_t mask = allow & rs->free_mask [bank];
+       for (i = 0; i < regbank_size [bank]; ++i) {
                if (mask & ((regmask_t)1 << i)) {
-                       rs->ffree_mask &= ~ ((regmask_t)1 << i);
+                       rs->free_mask [bank] &= ~ ((regmask_t)1 << i);
+
+                       mirrored_bank = get_mirrored_bank (bank);
+                       if (mirrored_bank == -1)
+                               return i;
+
+                       rs->free_mask [mirrored_bank] = rs->free_mask [bank];
                        return i;
                }
        }
@@ -112,32 +205,46 @@ mono_regstate_alloc_float (MonoRegState *rs, regmask_t allow)
 }
 
 static inline void
-mono_regstate_free_float (MonoRegState *rs, int reg)
+mono_regstate_free_general (MonoRegState *rs, int reg, int bank)
 {
+       int mirrored_bank;
+
        if (reg >= 0) {
-               rs->ffree_mask |= (regmask_t)1 << reg;
-               rs->fsymbolic [reg] = 0;
+               rs->free_mask [bank] |= (regmask_t)1 << reg;
+               rs->symbolic [bank][reg] = 0;
+
+               mirrored_bank = get_mirrored_bank (bank);
+               if (mirrored_bank == -1)
+                       return;
+               rs->free_mask [mirrored_bank] = rs->free_mask [bank];
+               rs->symbolic [mirrored_bank][reg] = 0;
        }
 }
 
 const char*
-mono_regname_full (int reg, gboolean fp)
+mono_regname_full (int reg, int bank)
 {
-       if (fp)
+       if (G_UNLIKELY (bank)) {
+#if MONO_ARCH_NEED_SIMD_BANK
+               if (bank == 2)
+                       return mono_arch_xregname (reg);
+#endif
+               g_assert (bank == 1);
                return mono_arch_fregname (reg);
-       else
+       } else {
                return mono_arch_regname (reg);
+       }
 }
 
 void
-mono_call_inst_add_outarg_reg (MonoCompile *cfg, MonoCallInst *call, int vreg, int hreg, gboolean fp)
+mono_call_inst_add_outarg_reg (MonoCompile *cfg, MonoCallInst *call, int vreg, int hreg, int bank)
 {
        guint32 regpair;
 
        regpair = (((guint32)hreg) << 24) + vreg;
-       if (fp) {
-               g_assert (vreg >= MONO_MAX_FREGS);
-               g_assert (hreg < MONO_MAX_FREGS);
+       if (G_UNLIKELY (bank)) {
+               g_assert (vreg >= regbank_size [bank]);
+               g_assert (hreg < regbank_size [bank]);
                call->used_fregs |= 1 << hreg;
                call->out_freg_args = g_slist_append_mempool (cfg->mempool, call->out_freg_args, (gpointer)(gssize)(regpair));
        } else {
@@ -149,27 +256,24 @@ mono_call_inst_add_outarg_reg (MonoCompile *cfg, MonoCallInst *call, int vreg, i
 }
 
 static void
-resize_spill_info (MonoCompile *cfg, gboolean fp)
+resize_spill_info (MonoCompile *cfg, int bank)
 {
-       MonoSpillInfo *orig_info = fp ? cfg->spill_info_float : cfg->spill_info;
-       int orig_len = fp ? cfg->spill_info_float_len : cfg->spill_info_len;
+       MonoSpillInfo *orig_info = cfg->spill_info [bank];
+       int orig_len = cfg->spill_info_len [bank];
        int new_len = orig_len ? orig_len * 2 : 16;
        MonoSpillInfo *new_info;
        int i;
 
+       g_assert (bank < MONO_NUM_REGBANKS);
+
        new_info = mono_mempool_alloc (cfg->mempool, sizeof (MonoSpillInfo) * new_len);
        if (orig_info)
                memcpy (new_info, orig_info, sizeof (MonoSpillInfo) * orig_len);
        for (i = orig_len; i < new_len; ++i)
                new_info [i].offset = -1;
 
-       if (!fp) {
-               cfg->spill_info = new_info;
-               cfg->spill_info_len = new_len;
-       } else {
-               cfg->spill_info_float = new_info;
-               cfg->spill_info_float_len = new_len;
-       }
+       cfg->spill_info [bank] = new_info;
+       cfg->spill_info_len [bank] = new_len;
 }
 
 /*
@@ -177,70 +281,58 @@ resize_spill_info (MonoCompile *cfg, gboolean fp)
  * spill variable if necessary. 
  */
 static inline int
-mono_spillvar_offset (MonoCompile *cfg, int spillvar, gboolean fp)
+mono_spillvar_offset (MonoCompile *cfg, int spillvar, int bank)
 {
        MonoSpillInfo *info;
+       int size;
 
-#if defined (__mips__)
-       g_assert_not_reached();
-#endif
-       if (G_UNLIKELY (spillvar >= (fp ? cfg->spill_info_float_len : cfg->spill_info_len))) {
-               while (spillvar >= (fp ? cfg->spill_info_float_len : cfg->spill_info_len))
-                       resize_spill_info (cfg, fp);
+       if (G_UNLIKELY (spillvar >= (cfg->spill_info_len [bank]))) {
+               while (spillvar >= cfg->spill_info_len [bank])
+                       resize_spill_info (cfg, bank);
        }
 
        /*
         * Allocate separate spill slots for fp/non-fp variables since most processors prefer it.
         */
-       info = fp ? &cfg->spill_info_float [spillvar] : &cfg->spill_info [spillvar];
+       info = &cfg->spill_info [bank][spillvar];
        if (info->offset == -1) {
-               cfg->stack_offset += sizeof (gpointer) - 1;
-               cfg->stack_offset &= ~(sizeof (gpointer) - 1);
+               cfg->stack_offset += sizeof (mgreg_t) - 1;
+               cfg->stack_offset &= ~(sizeof (mgreg_t) - 1);
+
+               g_assert (bank < MONO_NUM_REGBANKS);
+               if (G_UNLIKELY (bank))
+                       size = regbank_spill_var_size [bank];
+               else
+                       size = sizeof (mgreg_t);
 
                if (cfg->flags & MONO_CFG_HAS_SPILLUP) {
-                       if (fp) {
-                               cfg->stack_offset += 7;
-                               cfg->stack_offset &= ~7;
-                               info->offset = cfg->stack_offset;
-                               cfg->stack_offset += sizeof (double);
-                       } else {
-                               cfg->stack_offset += sizeof (gpointer) - 1;
-                               cfg->stack_offset &= ~(sizeof (gpointer) - 1);
-                               info->offset = cfg->stack_offset;
-                               cfg->stack_offset += sizeof (gpointer);
-                       }
+                       cfg->stack_offset += size - 1;
+                       cfg->stack_offset &= ~(size - 1);
+                       info->offset = cfg->stack_offset;
+                       cfg->stack_offset += size;
                } else {
-                       if (fp) {
-                               cfg->stack_offset += sizeof (double) - 1;
-                               cfg->stack_offset &= ~(sizeof (double) - 1);
-                               cfg->stack_offset += sizeof (double);
-                               info->offset = - cfg->stack_offset;
-                       } else {
-                               cfg->stack_offset += sizeof (gpointer) - 1;
-                               cfg->stack_offset &= ~(sizeof (gpointer) - 1);
-                               cfg->stack_offset += sizeof (gpointer);
-                               info->offset = - cfg->stack_offset;
-                       }
+                       cfg->stack_offset += size - 1;
+                       cfg->stack_offset &= ~(size - 1);
+                       cfg->stack_offset += size;
+                       info->offset = - cfg->stack_offset;
                }
        }
 
        return info->offset;
 }
 
-#define regmask(reg) (((regmask_t)1) << (reg))
-
 #define is_hard_ireg(r) ((r) >= 0 && (r) < MONO_MAX_IREGS)
 #define is_hard_freg(r) ((r) >= 0 && (r) < MONO_MAX_FREGS)
 #define is_global_ireg(r) (is_hard_ireg ((r)) && (MONO_ARCH_CALLEE_SAVED_REGS & (regmask (r))))
 #define is_local_ireg(r) (is_hard_ireg ((r)) && (MONO_ARCH_CALLEE_REGS & (regmask (r))))
 #define is_global_freg(r) (is_hard_freg ((r)) && (MONO_ARCH_CALLEE_SAVED_FREGS & (regmask (r))))
-#define is_local_freg(r) (is_hard_ireg ((r)) && (MONO_ARCH_CALLEE_FREGS & (regmask (r))))
-#define ireg_is_freeable(r) is_local_ireg ((r))
-#define freg_is_freeable(r) is_hard_freg ((r))
+#define is_local_freg(r) (is_hard_freg ((r)) && (MONO_ARCH_CALLEE_FREGS & (regmask (r))))
 
-#define reg_is_freeable(r,fp) ((fp) ? freg_is_freeable ((r)) : ireg_is_freeable ((r)))
-#define is_hard_reg(r,fp) (G_UNLIKELY (fp) ? ((r) < MONO_MAX_FREGS) : ((r) < MONO_MAX_IREGS))
-#define is_soft_reg(r,fp) (!is_hard_reg((r),(fp)))
+#define is_hard_reg(r,bank) (G_UNLIKELY (bank) ? ((r) >= 0 && (r) < regbank_size [bank]) : ((r) < MONO_MAX_IREGS))
+#define is_soft_reg(r,bank) (!is_hard_reg((r),(bank)))
+#define is_global_reg(r,bank) (G_UNLIKELY (bank) ? (is_hard_reg ((r), (bank)) && (regbank_callee_saved_regs [bank] & regmask (r))) : is_global_ireg (r))
+#define is_local_reg(r,bank) (G_UNLIKELY (bank) ? (is_hard_reg ((r), (bank)) && (regbank_callee_regs [bank] & regmask (r))) : is_local_ireg (r))
+#define reg_is_freeable(r,bank) (G_UNLIKELY (bank) ? is_local_reg ((r), (bank)) : is_local_ireg ((r)))
 
 #ifndef MONO_ARCH_INST_IS_FLOAT
 #define MONO_ARCH_INST_IS_FLOAT(desc) ((desc) == 'f')
@@ -248,12 +340,31 @@ mono_spillvar_offset (MonoCompile *cfg, int spillvar, gboolean fp)
 
 #define reg_is_fp(desc) (MONO_ARCH_INST_IS_FLOAT (desc))
 #define dreg_is_fp(spec)  (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_DEST]))
-#define sreg1_is_fp(spec) (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_SRC1]))
-#define sreg2_is_fp(spec) (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_SRC2]))
+#define sreg_is_fp(n,spec) (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_SRC1+(n)]))
+#define sreg1_is_fp(spec) sreg_is_fp (0,(spec))
+#define sreg2_is_fp(spec) sreg_is_fp (1,(spec))
+
+#define reg_is_simd(desc) ((desc) == 'x') 
 
-#define sreg1_is_fp_ins(ins) (sreg1_is_fp (ins_get_spec ((ins)->opcode)))
-#define sreg2_is_fp_ins(ins) (sreg2_is_fp (ins_get_spec ((ins)->opcode)))
-#define dreg_is_fp_ins(ins)  (dreg_is_fp (ins_get_spec ((ins)->opcode)))
+#ifdef MONO_ARCH_NEED_SIMD_BANK
+
+#define reg_bank(desc) (G_UNLIKELY (reg_is_fp (desc)) ? MONO_REG_DOUBLE : G_UNLIKELY (reg_is_simd(desc)) ? MONO_REG_SIMD : MONO_REG_INT)
+
+#else
+
+#define reg_bank(desc) reg_is_fp ((desc))
+
+#endif
+
+#define sreg_bank(n,spec) reg_bank ((spec)[MONO_INST_SRC1+(n)])
+#define sreg1_bank(spec) sreg_bank (0, (spec))
+#define sreg2_bank(spec) sreg_bank (1, (spec))
+#define dreg_bank(spec) reg_bank ((spec)[MONO_INST_DEST])
+
+#define sreg_bank_ins(n,ins) sreg_bank ((n), ins_get_spec ((ins)->opcode))
+#define sreg1_bank_ins(ins) sreg_bank_ins (0, (ins))
+#define sreg2_bank_ins(ins) sreg_bank_ins (1, (ins))
+#define dreg_bank_ins(ins) dreg_bank (ins_get_spec ((ins)->opcode))
 
 #define regpair_reg2_mask(desc,hreg1) ((MONO_ARCH_INST_REGPAIR_REG2 (desc,hreg1) != -1) ? (regmask (MONO_ARCH_INST_REGPAIR_REG2 (desc,hreg1))) : MONO_ARCH_CALLEE_REGS)
 
@@ -276,6 +387,9 @@ void
 mono_print_ins_index (int i, MonoInst *ins)
 {
        const char *spec = ins_get_spec (ins->opcode);
+       int num_sregs, j;
+       int sregs [MONO_MAX_SRC_REGS];
+
        if (i != -1)
                printf ("\t%-2d %s", i, mono_inst_name (ins->opcode));
        else
@@ -288,6 +402,8 @@ mono_print_ins_index (int i, MonoInst *ins)
                        printf (" R%d", ins->sreg1);
                if (ins->sreg2 != -1)
                        printf (" R%d", ins->sreg2);
+               if (ins->sreg3 != -1)
+                       printf (" R%d", ins->sreg3);
 
                switch (ins->opcode) {
                case OP_LBNE_UN:
@@ -300,14 +416,14 @@ mono_print_ins_index (int i, MonoInst *ins)
                case OP_LBGE_UN:
                case OP_LBLE:
                case OP_LBLE_UN:
-                       if (!(ins->flags & MONO_INST_BRLABEL)) {
-                               if (!ins->inst_false_bb)
-                                       printf (" [B%d]", ins->inst_true_bb->block_num);
-                               else
-                                       printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
-                       }
+                       if (!ins->inst_false_bb)
+                               printf (" [B%d]", ins->inst_true_bb->block_num);
+                       else
+                               printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
                        break;
                case OP_PHI:
+               case OP_VPHI:
+               case OP_XPHI:
                case OP_FPHI: {
                        int i;
                        printf (" [%d (", (int)ins->inst_c0);
@@ -325,6 +441,7 @@ mono_print_ins_index (int i, MonoInst *ins)
                        break;
                case OP_REGOFFSET:
                        printf (" + 0x%lx", (long)ins->inst_offset);
+                       break;
                default:
                        break;
                }
@@ -335,8 +452,8 @@ mono_print_ins_index (int i, MonoInst *ins)
        }
 
        if (spec [MONO_INST_DEST]) {
-               gboolean fp = dreg_is_fp_ins (ins);
-               if (is_soft_reg (ins->dreg, fp)) {
+               int bank = dreg_bank (spec);
+               if (is_soft_reg (ins->dreg, bank)) {
                        if (spec [MONO_INST_DEST] == 'b') {
                                if (ins->inst_offset == 0)
                                        printf (" [R%d] <-", ins->dreg);
@@ -351,11 +468,11 @@ mono_print_ins_index (int i, MonoInst *ins)
                        else
                                printf (" [%s + 0x%lx] <-", mono_arch_regname (ins->dreg), (long)ins->inst_offset);
                } else
-                       printf (" %s <-", mono_regname_full (ins->dreg, fp));
+                       printf (" %s <-", mono_regname_full (ins->dreg, bank));
        }
        if (spec [MONO_INST_SRC1]) {
-               gboolean fp = (spec [MONO_INST_SRC1] == 'f');
-               if (is_soft_reg (ins->sreg1, fp)) {
+               int bank = sreg1_bank (spec);
+               if (is_soft_reg (ins->sreg1, bank)) {
                        if (spec [MONO_INST_SRC1] == 'b')
                                printf (" [R%d + 0x%lx]", ins->sreg1, (long)ins->inst_offset);
                        else
@@ -363,21 +480,22 @@ mono_print_ins_index (int i, MonoInst *ins)
                } else if (spec [MONO_INST_SRC1] == 'b')
                        printf (" [%s + 0x%lx]", mono_arch_regname (ins->sreg1), (long)ins->inst_offset);
                else
-                       printf (" %s", mono_regname_full (ins->sreg1, fp));
+                       printf (" %s", mono_regname_full (ins->sreg1, bank));
        }
-       if (spec [MONO_INST_SRC2]) {
-               gboolean fp = (spec [MONO_INST_SRC2] == 'f');
-               if (is_soft_reg (ins->sreg2, fp))
-                       printf (" R%d", ins->sreg2);
+       num_sregs = mono_inst_get_src_registers (ins, sregs);
+       for (j = 1; j < num_sregs; ++j) {
+               int bank = sreg_bank (j, spec);
+               if (is_soft_reg (sregs [j], bank))
+                       printf (" R%d", sregs [j]);
                else
-                       printf (" %s", mono_regname_full (ins->sreg2, fp));
+                       printf (" %s", mono_regname_full (sregs [j], bank));
        }
 
        switch (ins->opcode) {
        case OP_ICONST:
                printf (" [%d]", (int)ins->inst_c0);
                break;
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(TARGET_X86) || defined(TARGET_AMD64)
        case OP_X86_PUSH_IMM:
 #endif
        case OP_ICOMPARE_IMM:
@@ -402,8 +520,6 @@ mono_print_ins_index (int i, MonoInst *ins)
        case OP_R4CONST:
                printf (" [%f]", *(float*)ins->inst_p0);
                break;
-       case CEE_CALL:
-       case CEE_CALLVIRT:
        case OP_CALL:
        case OP_CALL_MEMBASE:
        case OP_CALL_REG:
@@ -419,6 +535,7 @@ mono_print_ins_index (int i, MonoInst *ins)
        case OP_VCALL2_REG:
        case OP_VCALL2_MEMBASE:
        case OP_VOIDCALL:
+       case OP_VOIDCALL_MEMBASE:
        case OP_VOIDCALLVIRT: {
                MonoCallInst *call = (MonoCallInst*)ins;
                GSList *list;
@@ -461,16 +578,6 @@ mono_print_ins_index (int i, MonoInst *ins)
        case OP_CALL_HANDLER:
                printf (" [B%d]", ins->inst_target_bb->block_num);
                break;
-       case CEE_BNE_UN:
-       case CEE_BEQ:
-       case CEE_BLT:
-       case CEE_BLT_UN:
-       case CEE_BGT:
-       case CEE_BGT_UN:
-       case CEE_BGE:
-       case CEE_BGE_UN:
-       case CEE_BLE:
-       case CEE_BLE_UN:
        case OP_IBNE_UN:
        case OP_IBEQ:
        case OP_IBLT:
@@ -491,12 +598,14 @@ mono_print_ins_index (int i, MonoInst *ins)
        case OP_LBGE_UN:
        case OP_LBLE:
        case OP_LBLE_UN:
-               if (!(ins->flags & MONO_INST_BRLABEL)) {
-                       if (!ins->inst_false_bb)
-                               printf (" [B%d]", ins->inst_true_bb->block_num);
-                       else
-                               printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
-               }
+               if (!ins->inst_false_bb)
+                       printf (" [B%d]", ins->inst_true_bb->block_num);
+               else
+                       printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
+               break;
+       case OP_LIVERANGE_START:
+       case OP_LIVERANGE_END:
+               printf (" R%d", (int)ins->inst_c1);
                break;
        default:
                break;
@@ -564,41 +673,37 @@ insert_after_ins (MonoBasicBlock *bb, MonoInst *ins, MonoInst **last, MonoInst*
  * Force the spilling of the variable in the symbolic register 'reg'.
  */
 static int
-get_register_force_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int reg, gboolean fp)
+get_register_force_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int reg, int bank)
 {
        MonoInst *load;
        int i, sel, spill;
        int *symbolic;
        MonoRegState *rs = cfg->rs;
 
-       if (fp)
-               symbolic = rs->fsymbolic;
-       else
-               symbolic = rs->isymbolic;
-
+       symbolic = rs->symbolic [bank];
        sel = rs->vassign [reg];
 
+       /* the vreg we need to spill lives in another logical reg bank */
+       bank = translate_bank (cfg->rs, bank, sel);
+
        /*i = rs->isymbolic [sel];
        g_assert (i == reg);*/
        i = reg;
        spill = ++cfg->spill_count;
        rs->vassign [i] = -spill - 1;
-       if (fp)
-               mono_regstate_free_float (rs, sel);
+       if (G_UNLIKELY (bank))
+               mono_regstate_free_general (rs, sel, bank);
        else
                mono_regstate_free_int (rs, sel);
        /* we need to create a spill var and insert a load to sel after the current instruction */
-       if (fp)
-               MONO_INST_NEW (cfg, load, OP_LOADR8_MEMBASE);
-       else
-               MONO_INST_NEW (cfg, load, OP_LOAD_MEMBASE);
+       MONO_INST_NEW (cfg, load, regbank_load_ops [bank]);
        load->dreg = sel;
        load->inst_basereg = cfg->frame_reg;
-       load->inst_offset = mono_spillvar_offset (cfg, spill, fp);
+       load->inst_offset = mono_spillvar_offset (cfg, spill, bank);
        insert_after_ins (bb, ins, last, load);
-       DEBUG (printf ("SPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, fp)));
-       if (fp)
-               i = mono_regstate_alloc_float (rs, regmask (sel));
+       DEBUG (printf ("SPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, bank)));
+       if (G_UNLIKELY (bank))
+               i = mono_regstate_alloc_general (rs, regmask (sel), bank);
        else
                i = mono_regstate_alloc_int (rs, regmask (sel));
        g_assert (i == sel);
@@ -612,56 +717,56 @@ get_register_force_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **la
 #endif
 
 static int
-get_register_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t regmask, int reg, gboolean fp)
+get_register_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t regmask, int reg, int bank)
 {
        MonoInst *load;
-       int i, sel, spill;
+       int i, sel, spill, num_sregs;
+       int sregs [MONO_MAX_SRC_REGS];
        int *symbolic;
        MonoRegState *rs = cfg->rs;
 
-       if (fp)
-               symbolic = rs->fsymbolic;
-       else
-               symbolic = rs->isymbolic;
+       symbolic = rs->symbolic [bank];
 
-       DEBUG (printf ("\tstart regmask to assign R%d: 0x%08" G_GUINT64_FORMAT " (R%d <- R%d R%d)\n", reg, (guint64)regmask, ins->dreg, ins->sreg1, ins->sreg2));
+       g_assert (bank < MONO_NUM_REGBANKS);
+
+       DEBUG (printf ("\tstart regmask to assign R%d: 0x%08" G_GUINT64_FORMAT " (R%d <- R%d R%d R%d)\n", reg, (guint64)regmask, ins->dreg, ins->sreg1, ins->sreg2, ins->sreg3));
        /* exclude the registers in the current instruction */
-       if ((sreg1_is_fp_ins (ins) == fp) && (reg != ins->sreg1) && (reg_is_freeable (ins->sreg1, fp) || (is_soft_reg (ins->sreg1, fp) && rs->vassign [ins->sreg1] >= 0))) {
-               if (is_soft_reg (ins->sreg1, fp))
-                       regmask &= ~ (regmask (rs->vassign [ins->sreg1]));
-               else
-                       regmask &= ~ (regmask (ins->sreg1));
-               DEBUG (printf ("\t\texcluding sreg1 %s\n", mono_regname_full (ins->sreg1, fp)));
-       }
-       if ((sreg2_is_fp_ins (ins) == fp) && (reg != ins->sreg2) && (reg_is_freeable (ins->sreg2, fp) || (is_soft_reg (ins->sreg2, fp) && rs->vassign [ins->sreg2] >= 0))) {
-               if (is_soft_reg (ins->sreg2, fp))
-                       regmask &= ~ (regmask (rs->vassign [ins->sreg2]));
-               else
-                       regmask &= ~ (regmask (ins->sreg2));
-               DEBUG (printf ("\t\texcluding sreg2 %s %d\n", mono_regname_full (ins->sreg2, fp), ins->sreg2));
+       num_sregs = mono_inst_get_src_registers (ins, sregs);
+       for (i = 0; i < num_sregs; ++i) {
+               if ((sreg_bank_ins (i, ins) == bank) && (reg != sregs [i]) && (reg_is_freeable (sregs [i], bank) || (is_soft_reg (sregs [i], bank) && rs->vassign [sregs [i]] >= 0))) {
+                       if (is_soft_reg (sregs [i], bank))
+                               regmask &= ~ (regmask (rs->vassign [sregs [i]]));
+                       else
+                               regmask &= ~ (regmask (sregs [i]));
+                       DEBUG (printf ("\t\texcluding sreg%d %s %d\n", i + 1, mono_regname_full (sregs [i], bank), sregs [i]));
+               }
        }
-       if ((dreg_is_fp_ins (ins) == fp) && (reg != ins->dreg) && reg_is_freeable (ins->dreg, fp)) {
+       if ((dreg_bank_ins (ins) == bank) && (reg != ins->dreg) && reg_is_freeable (ins->dreg, bank)) {
                regmask &= ~ (regmask (ins->dreg));
-               DEBUG (printf ("\t\texcluding dreg %s\n", mono_regname_full (ins->dreg, fp)));
+               DEBUG (printf ("\t\texcluding dreg %s\n", mono_regname_full (ins->dreg, bank)));
        }
 
        DEBUG (printf ("\t\tavailable regmask: 0x%08" G_GUINT64_FORMAT "\n", (guint64)regmask));
        g_assert (regmask); /* need at least a register we can free */
        sel = 0;
        /* we should track prev_use and spill the register that's farther */
-       if (fp) {
-               for (i = 0; i < MONO_MAX_FREGS; ++i) {
+       if (G_UNLIKELY (bank)) {
+               for (i = 0; i < regbank_size [bank]; ++i) {
                        if (regmask & (regmask (i))) {
                                sel = i;
-                               DEBUG (printf ("\t\tselected register %s has assignment %d\n", mono_arch_fregname (sel), rs->fsymbolic [sel]));
+
+                               /* the vreg we need to load lives in another logical bank */
+                               bank = translate_bank (cfg->rs, bank, sel);
+
+                               DEBUG (printf ("\t\tselected register %s has assignment %d\n", mono_regname_full (sel, bank), rs->symbolic [bank] [sel]));
                                break;
                        }
                }
 
-               i = rs->fsymbolic [sel];
+               i = rs->symbolic [bank] [sel];
                spill = ++cfg->spill_count;
                rs->vassign [i] = -spill - 1;
-               mono_regstate_free_float (rs, sel);
+               mono_regstate_free_general (rs, sel, bank);
        }
        else {
                for (i = 0; i < MONO_MAX_IREGS; ++i) {
@@ -679,14 +784,14 @@ get_register_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, Mo
        }
 
        /* we need to create a spill var and insert a load to sel after the current instruction */
-       MONO_INST_NEW (cfg, load, fp ? OP_LOADR8_MEMBASE : OP_LOAD_MEMBASE);
+       MONO_INST_NEW (cfg, load, regbank_load_ops [bank]);
        load->dreg = sel;
        load->inst_basereg = cfg->frame_reg;
-       load->inst_offset = mono_spillvar_offset (cfg, spill, fp);
+       load->inst_offset = mono_spillvar_offset (cfg, spill, bank);
        insert_after_ins (bb, ins, last, load);
-       DEBUG (printf ("\tSPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, fp)));
-       if (fp)
-               i = mono_regstate_alloc_float (rs, regmask (sel));
+       DEBUG (printf ("\tSPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, bank)));
+       if (G_UNLIKELY (bank))
+               i = mono_regstate_alloc_general (rs, regmask (sel), bank);
        else
                i = mono_regstate_alloc_int (rs, regmask (sel));
        g_assert (i == sel);
@@ -695,33 +800,31 @@ get_register_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, Mo
 }
 
 static void
-free_up_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int hreg, gboolean fp)
+free_up_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int hreg, int bank)
 {
-       if (fp) {
-               if (!(cfg->rs->ffree_mask & (regmask (hreg)))) {
-                       DEBUG (printf ("\tforced spill of R%d\n", cfg->rs->fsymbolic [hreg]));
-                       get_register_force_spilling (cfg, bb, last, ins, cfg->rs->fsymbolic [hreg], fp);
-                       mono_regstate_free_float (cfg->rs, hreg);
+       if (G_UNLIKELY (bank)) {
+               if (!(cfg->rs->free_mask [1] & (regmask (hreg)))) {
+                       bank = translate_bank (cfg->rs, bank, hreg);
+                       DEBUG (printf ("\tforced spill of R%d\n", cfg->rs->symbolic [bank] [hreg]));
+                       get_register_force_spilling (cfg, bb, last, ins, cfg->rs->symbolic [bank] [hreg], bank);
+                       mono_regstate_free_general (cfg->rs, hreg, bank);
                }
        }
        else {
                if (!(cfg->rs->ifree_mask & (regmask (hreg)))) {
                        DEBUG (printf ("\tforced spill of R%d\n", cfg->rs->isymbolic [hreg]));
-                       get_register_force_spilling (cfg, bb, last, ins, cfg->rs->isymbolic [hreg], fp);
+                       get_register_force_spilling (cfg, bb, last, ins, cfg->rs->isymbolic [hreg], bank);
                        mono_regstate_free_int (cfg->rs, hreg);
                }
        }
 }
 
 static MonoInst*
-create_copy_ins (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, int dest, int src, MonoInst *ins, const unsigned char *ip, gboolean fp)
+create_copy_ins (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, int dest, int src, MonoInst *ins, const unsigned char *ip, int bank)
 {
        MonoInst *copy;
 
-       if (fp)
-               MONO_INST_NEW (cfg, copy, OP_FMOVE);
-       else
-               MONO_INST_NEW (cfg, copy, OP_MOVE);
+       MONO_INST_NEW (cfg, copy, regbank_move_ops [bank]);
 
        copy->dreg = dest;
        copy->sreg1 = src;
@@ -730,23 +833,23 @@ create_copy_ins (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, int dest
                mono_bblock_insert_after_ins (bb, ins, copy);
                *last = copy;
        }
-       DEBUG (printf ("\tforced copy from %s to %s\n", mono_regname_full (src, fp), mono_regname_full (dest, fp)));
+       DEBUG (printf ("\tforced copy from %s to %s\n", mono_regname_full (src, bank), mono_regname_full (dest, bank)));
        return copy;
 }
 
 static MonoInst*
-create_spilled_store (MonoCompile *cfg, MonoBasicBlock *bb, int spill, int reg, int prev_reg, MonoInst **last, MonoInst *ins, gboolean fp)
+create_spilled_store (MonoCompile *cfg, MonoBasicBlock *bb, int spill, int reg, int prev_reg, MonoInst **last, MonoInst *ins, int bank)
 {
        MonoInst *store;
-       MONO_INST_NEW (cfg, store, fp ? OP_STORER8_MEMBASE_REG : OP_STORE_MEMBASE_REG);
+       MONO_INST_NEW (cfg, store, regbank_store_ops [bank]);
        store->sreg1 = reg;
        store->inst_destbasereg = cfg->frame_reg;
-       store->inst_offset = mono_spillvar_offset (cfg, spill, fp);
+       store->inst_offset = mono_spillvar_offset (cfg, spill, bank);
        if (ins) {
                mono_bblock_insert_after_ins (bb, ins, store);
                *last = store;
        }
-       DEBUG (printf ("\tSPILLED STORE (%d at 0x%08lx(%%ebp)) R%d (from %s)\n", spill, (long)store->inst_offset, prev_reg, mono_regname_full (reg, fp)));
+       DEBUG (printf ("\tSPILLED STORE (%d at 0x%08lx(%%ebp)) R%d (from %s)\n", spill, (long)store->inst_offset, prev_reg, mono_regname_full (reg, bank)));
        return store;
 }
 
@@ -772,50 +875,66 @@ alloc_int_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *
 
        val = mono_regstate_alloc_int (cfg->rs, dest_mask);
        if (val < 0)
-               val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, FALSE);
+               val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, 0);
 
        return val;
 }
 
 static inline int
-alloc_float_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg)
+alloc_general_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, int bank)
 {
        int val;
 
-       val = mono_regstate_alloc_float (cfg->rs, dest_mask);
+       val = mono_regstate_alloc_general (cfg->rs, dest_mask, bank);
 
-       if (val < 0) {
-               val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, TRUE);
-       }
+       if (val < 0)
+               val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, bank);
 
        return val;
 }
 
 static inline int
-alloc_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, RegTrack *info, gboolean fp)
+alloc_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, RegTrack *info, int bank)
 {
-       if (G_UNLIKELY (fp))
-               return alloc_float_reg (cfg, bb, last, ins, dest_mask, sym_reg);
+       if (G_UNLIKELY (bank))
+               return alloc_general_reg (cfg, bb, last, ins, dest_mask, sym_reg, bank);
        else
                return alloc_int_reg (cfg, bb, last, ins, dest_mask, sym_reg, info);
 }
 
 static inline void
-assign_reg (MonoCompile *cfg, MonoRegState *rs, int reg, int hreg, gboolean fp)
+assign_reg (MonoCompile *cfg, MonoRegState *rs, int reg, int hreg, int bank)
 {
-       if (G_UNLIKELY (fp)) {
-               g_assert (reg >= MONO_MAX_FREGS);
-               g_assert (hreg < MONO_MAX_FREGS);
+       if (G_UNLIKELY (bank)) {
+               int mirrored_bank;
+
+               g_assert (reg >= regbank_size [bank]);
+               g_assert (hreg < regbank_size [bank]);
                g_assert (! is_global_freg (hreg));
 
                rs->vassign [reg] = hreg;
-               rs->fsymbolic [hreg] = reg;
-               rs->ffree_mask &= ~ (regmask (hreg));
+               rs->symbolic [bank] [hreg] = reg;
+               rs->free_mask [bank] &= ~ (regmask (hreg));
+
+               mirrored_bank = get_mirrored_bank (bank);
+               if (mirrored_bank == -1)
+                       return;
+
+               /* Make sure the other logical reg bank that this bank shares
+                * a single hard reg bank knows that this hard reg is not free.
+                */
+               rs->free_mask [mirrored_bank] = rs->free_mask [bank];
+
+               /* Mark the other logical bank that the this bank shares
+                * a single hard reg bank with as mirrored.
+                */
+               rs->symbolic [mirrored_bank] [hreg] = MONO_ARCH_BANK_MIRRORED;
+
        }
        else {
                g_assert (reg >= MONO_MAX_IREGS);
                g_assert (hreg < MONO_MAX_IREGS);
-#ifndef __arm__
+#ifndef TARGET_ARM
                /* this seems to trigger a gcc compilation bug sometime (hreg is 0) */
                g_assert (! is_global_ireg (hreg));
 #endif
@@ -826,9 +945,19 @@ assign_reg (MonoCompile *cfg, MonoRegState *rs, int reg, int hreg, gboolean fp)
        }
 }
 
+static inline regmask_t
+get_callee_mask (const char spec)
+{
+       if (G_UNLIKELY (reg_bank (spec)))
+               return regbank_callee_regs [reg_bank (spec)];
+       return MONO_ARCH_CALLEE_REGS;
+}
+
 static gint8 desc_to_fixed_reg [256];
 static gboolean desc_to_fixed_reg_inited = FALSE;
 
+#ifndef DISABLE_JIT
+
 /*
  * Local register allocation.
  * We first scan the list of instructions and we save the liveness info of
@@ -842,16 +971,18 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
        MonoInst *ins, *prev, *last;
        MonoInst **tmp;
        MonoRegState *rs = cfg->rs;
-       int i, val, max;
+       int i, j, val, max;
        RegTrack *reginfo;
        const char *spec;
-       unsigned char spec_src1, spec_src2, spec_dest;
-       gboolean fp;
+       unsigned char spec_src1, spec_dest;
+       int bank = 0;
 #if MONO_ARCH_USE_FPSTACK
        gboolean has_fp = FALSE;
        int fpstack [8];
        int sp = 0;
 #endif
+       int num_sregs;
+       int sregs [MONO_MAX_SRC_REGS];
 
        if (!bb->code)
                return;
@@ -860,13 +991,31 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                for (i = 0; i < 256; ++i)
                        desc_to_fixed_reg [i] = MONO_ARCH_INST_FIXED_REG (i);
                desc_to_fixed_reg_inited = TRUE;
+
+               /* Validate the cpu description against the info in mini-ops.h */
+#if defined(TARGET_AMD64) || defined(TARGET_X86) || defined(TARGET_ARM)
+               for (i = OP_LOAD; i < OP_LAST; ++i) {
+                       const char *ispec;
+
+                       spec = ins_get_spec (i);
+                       ispec = INS_INFO (i);
+
+                       if ((spec [MONO_INST_DEST] && (ispec [MONO_INST_DEST] == ' ')))
+                               printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
+                       if ((spec [MONO_INST_SRC1] && (ispec [MONO_INST_SRC1] == ' ')))
+                               printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
+                       if ((spec [MONO_INST_SRC2] && (ispec [MONO_INST_SRC2] == ' ')))
+                               printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
+               }
+#endif
        }
 
        rs->next_vreg = bb->max_vreg;
        mono_regstate_assign (rs);
 
        rs->ifree_mask = MONO_ARCH_CALLEE_REGS;
-       rs->ffree_mask = MONO_ARCH_CALLEE_FREGS;
+       for (i = 0; i < MONO_NUM_REGBANKS; ++i)
+               rs->free_mask [i] = regbank_callee_regs [i];
 
        max = rs->next_vreg;
 
@@ -886,54 +1035,43 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                memset (cfg->reginfo, 0, cfg->reginfo_len * sizeof (RegTrack));
        }
 
-       if (cfg->new_ir) {
-               /* 
-                * For large methods, next_vreg can be very large, so g_malloc0 time can
-                * be prohibitive. So we manually init the reginfo entries used by the 
-                * bblock.
-                */
-               for (ins = bb->code; ins; ins = ins->next) {
-                       spec = ins_get_spec (ins->opcode);
+       /* 
+        * For large methods, next_vreg can be very large, so g_malloc0 time can
+        * be prohibitive. So we manually init the reginfo entries used by the 
+        * bblock.
+        */
+       for (ins = bb->code; ins; ins = ins->next) {
+               spec = ins_get_spec (ins->opcode);
 
-                       if ((ins->dreg != -1) && (ins->dreg < max)) {
-                               memset (&reginfo [ins->dreg], 0, sizeof (RegTrack));
-#if SIZEOF_VOID_P == 4
-                               if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_DEST])) {
-                                       /**
-                                        * In the new IR, the two vregs of the regpair do not alias the
-                                        * original long vreg. shift the vreg here so the rest of the 
-                                        * allocator doesn't have to care about it.
-                                        */
-                                       if (cfg->new_ir)
-                                               ins->dreg ++;
-                                       memset (&reginfo [ins->dreg + 1], 0, sizeof (RegTrack));
-                               }
-#endif
+               if ((ins->dreg != -1) && (ins->dreg < max)) {
+                       memset (&reginfo [ins->dreg], 0, sizeof (RegTrack));
+#if SIZEOF_REGISTER == 4
+                       if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_DEST])) {
+                               /**
+                                * In the new IR, the two vregs of the regpair do not alias the
+                                * original long vreg. shift the vreg here so the rest of the 
+                                * allocator doesn't have to care about it.
+                                */
+                               ins->dreg ++;
+                               memset (&reginfo [ins->dreg + 1], 0, sizeof (RegTrack));
                        }
-                       if ((ins->sreg1 != -1) && (ins->sreg1 < max)) {
-                               memset (&reginfo [ins->sreg1], 0, sizeof (RegTrack));
-#if SIZEOF_VOID_P == 4
-                               if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC1])) {
-                                       if (cfg->new_ir)
-                                               ins->sreg1 ++;
-                                       memset (&reginfo [ins->sreg1 + 1], 0, sizeof (RegTrack));
-                               }
 #endif
-                       }
-                       if ((ins->sreg2 != -1) && (ins->sreg2 < max)) {
-                               memset (&reginfo [ins->sreg2], 0, sizeof (RegTrack));
-#if SIZEOF_VOID_P == 4
-                               if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC2])) {
-                                       if (cfg->new_ir)
-                                               ins->sreg2 ++;
-                                       memset (&reginfo [ins->sreg2 + 1], 0, sizeof (RegTrack));
+               }
+
+               num_sregs = mono_inst_get_src_registers (ins, sregs);
+               for (j = 0; j < num_sregs; ++j) {
+                       g_assert (sregs [j] != -1);
+                       if (sregs [j] < max) {
+                               memset (&reginfo [sregs [j]], 0, sizeof (RegTrack));
+#if SIZEOF_REGISTER == 4
+                               if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC1 + j])) {
+                                       sregs [j]++;
+                                       memset (&reginfo [sregs [j] + 1], 0, sizeof (RegTrack));
                                }
 #endif
                        }
                }
-       }
-       else {
-               memset (reginfo, 0, max * sizeof (RegTrack));
+               mono_inst_set_src_registers (ins, sregs);
        }
 
        /*if (cfg->opt & MONO_OPT_COPYPROP)
@@ -944,8 +1082,6 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
        /* forward pass on the instructions to collect register liveness info */
        MONO_BB_FOR_EACH_INS (bb, ins) {
                spec = ins_get_spec (ins->opcode);
-               spec_src1 = spec [MONO_INST_SRC1];
-               spec_src2 = spec [MONO_INST_SRC2];
                spec_dest = spec [MONO_INST_DEST];
 
                if (G_UNLIKELY (spec == MONO_ARCH_CPU_SPEC)) {
@@ -954,55 +1090,49 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                
                DEBUG (mono_print_ins_index (i, ins));
 
+               num_sregs = mono_inst_get_src_registers (ins, sregs);
+
 #if MONO_ARCH_USE_FPSTACK
-               if (sreg1_is_fp (spec) || sreg2_is_fp (spec) || dreg_is_fp (spec))
+               if (dreg_is_fp (spec)) {
                        has_fp = TRUE;
-#endif
-
-               if (spec_src1) {
-                       fp = sreg1_is_fp (spec);
-                       g_assert (ins->sreg1 != -1);
-                       if (cfg->new_ir && is_soft_reg (ins->sreg1, fp))
-                               /* This means the vreg is not local to this bb */
-                               g_assert (reginfo [ins->sreg1].born_in > 0);
-                       rs->vassign [ins->sreg1] = -1;
-                       //reginfo [ins->sreg1].prev_use = reginfo [ins->sreg1].last_use;
-                       //reginfo [ins->sreg1].last_use = i;
-                       if (MONO_ARCH_INST_IS_REGPAIR (spec_src2)) {
-                               /* The virtual register is allocated sequentially */
-                               rs->vassign [ins->sreg1 + 1] = -1;
-                               //reginfo [ins->sreg1 + 1].prev_use = reginfo [ins->sreg1 + 1].last_use;
-                               //reginfo [ins->sreg1 + 1].last_use = i;
-                               if (reginfo [ins->sreg1 + 1].born_in == 0 || reginfo [ins->sreg1 + 1].born_in > i)
-                                       reginfo [ins->sreg1 + 1].born_in = i;
-                       }
                } else {
-                       ins->sreg1 = -1;
+                       for (j = 0; j < num_sregs; ++j) {
+                               if (sreg_is_fp (j, spec))
+                                       has_fp = TRUE;
+                       }
                }
-               if (spec_src2) {
-                       fp = sreg2_is_fp (spec);
-                       g_assert (ins->sreg2 != -1);
-                       if (cfg->new_ir && is_soft_reg (ins->sreg2, fp))
-                               /* This means the vreg is not local to this bb */
-                               g_assert (reginfo [ins->sreg2].born_in > 0);
-                       rs->vassign [ins->sreg2] = -1;
-                       //reginfo [ins->sreg2].prev_use = reginfo [ins->sreg2].last_use;
-                       //reginfo [ins->sreg2].last_use = i;
-                       if (MONO_ARCH_INST_IS_REGPAIR (spec_src2)) {
-                               /* The virtual register is allocated sequentially */
-                               rs->vassign [ins->sreg2 + 1] = -1;
-                               //reginfo [ins->sreg2 + 1].prev_use = reginfo [ins->sreg2 + 1].last_use;
-                               //reginfo [ins->sreg2 + 1].last_use = i;
-                               if (reginfo [ins->sreg2 + 1].born_in == 0 || reginfo [ins->sreg2 + 1].born_in > i)
-                                       reginfo [ins->sreg2 + 1].born_in = i;
+#endif
+
+               for (j = 0; j < num_sregs; ++j) {
+                       int sreg = sregs [j];
+                       int sreg_spec = spec [MONO_INST_SRC1 + j];
+                       if (sreg_spec) {
+                               bank = sreg_bank (j, spec);
+                               g_assert (sreg != -1);
+                               if (is_soft_reg (sreg, bank))
+                                       /* This means the vreg is not local to this bb */
+                                       g_assert (reginfo [sreg].born_in > 0);
+                               rs->vassign [sreg] = -1;
+                               //reginfo [ins->sreg2].prev_use = reginfo [ins->sreg2].last_use;
+                               //reginfo [ins->sreg2].last_use = i;
+                               if (MONO_ARCH_INST_IS_REGPAIR (sreg_spec)) {
+                                       /* The virtual register is allocated sequentially */
+                                       rs->vassign [sreg + 1] = -1;
+                                       //reginfo [ins->sreg2 + 1].prev_use = reginfo [ins->sreg2 + 1].last_use;
+                                       //reginfo [ins->sreg2 + 1].last_use = i;
+                                       if (reginfo [sreg + 1].born_in == 0 || reginfo [sreg + 1].born_in > i)
+                                               reginfo [sreg + 1].born_in = i;
+                               }
+                       } else {
+                               sregs [j] = -1;
                        }
-               } else {
-                       ins->sreg2 = -1;
                }
+               mono_inst_set_src_registers (ins, sregs);
+
                if (spec_dest) {
                        int dest_dreg;
 
-                       fp = dreg_is_fp (spec);
+                       bank = dreg_bank (spec);
                        if (spec_dest != 'b') /* it's not just a base register */
                                reginfo [ins->dreg].killed_in = i;
                        g_assert (ins->dreg != -1);
@@ -1034,7 +1164,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                        ins->dreg = -1;
                }
 
-               if (spec [MONO_INST_CLOB] == 'c') {
+               if (spec [MONO_INST_CLOB] == 'c' && MONO_IS_CALL (ins)) {
                        /* A call instruction implicitly uses all registers in call->out_ireg_args */
 
                        MonoCallInst *call = (MonoCallInst*)ins;
@@ -1079,30 +1209,35 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
 
        DEBUG (print_regtrack (reginfo, rs->next_vreg));
        MONO_BB_FOR_EACH_INS_REVERSE_SAFE (bb, prev, ins) {
-               int prev_dreg, prev_sreg1, prev_sreg2, clob_dreg;
-               int dest_dreg, dest_sreg1, dest_sreg2, clob_reg;
+               int prev_dreg, clob_dreg;
+               int dest_dreg, clob_reg;
+               int dest_sregs [MONO_MAX_SRC_REGS], prev_sregs [MONO_MAX_SRC_REGS];
                int dreg_high, sreg1_high;
-               regmask_t dreg_mask, sreg1_mask, sreg2_mask, mask;
-               regmask_t dreg_fixed_mask, sreg1_fixed_mask, sreg2_fixed_mask;
+               regmask_t dreg_mask, mask;
+               regmask_t sreg_masks [MONO_MAX_SRC_REGS], sreg_fixed_masks [MONO_MAX_SRC_REGS];
+               regmask_t dreg_fixed_mask;
                const unsigned char *ip;
                --i;
                spec = ins_get_spec (ins->opcode);
                spec_src1 = spec [MONO_INST_SRC1];
-               spec_src2 = spec [MONO_INST_SRC2];
                spec_dest = spec [MONO_INST_DEST];
                prev_dreg = -1;
-               prev_sreg2 = -1;
                clob_dreg = -1;
                clob_reg = -1;
                dest_dreg = -1;
-               dest_sreg1 = -1;
-               dest_sreg2 = -1;
-               prev_sreg1 = -1;
                dreg_high = -1;
                sreg1_high = -1;
-               dreg_mask = dreg_is_fp (spec) ? MONO_ARCH_CALLEE_FREGS : MONO_ARCH_CALLEE_REGS;
-               sreg1_mask = sreg1_is_fp (spec) ? MONO_ARCH_CALLEE_FREGS : MONO_ARCH_CALLEE_REGS;
-               sreg2_mask = sreg2_is_fp (spec) ? MONO_ARCH_CALLEE_FREGS : MONO_ARCH_CALLEE_REGS;
+               dreg_mask = get_callee_mask (spec_dest);
+               for (j = 0; j < MONO_MAX_SRC_REGS; ++j) {
+                       prev_sregs [j] = -1;
+                       sreg_masks [j] = get_callee_mask (spec [MONO_INST_SRC1 + j]);
+                       dest_sregs [j] = desc_to_fixed_reg [(int)spec [MONO_INST_SRC1 + j]];
+#ifdef MONO_ARCH_INST_FIXED_MASK
+                       sreg_fixed_masks [j] = MONO_ARCH_INST_FIXED_MASK (spec [MONO_INST_SRC1 + j]);
+#else
+                       sreg_fixed_masks [j] = 0;
+#endif
+               }
 
                DEBUG (printf ("processing:"));
                DEBUG (mono_print_ins_index (i, ins));
@@ -1114,127 +1249,151 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                /*
                 * FIXED REGS
                 */
-               dest_sreg1 = desc_to_fixed_reg [spec_src1];
-               dest_sreg2 = desc_to_fixed_reg [spec_src2];
                dest_dreg = desc_to_fixed_reg [spec_dest];
                clob_reg = desc_to_fixed_reg [(int)spec [MONO_INST_CLOB]];
-               sreg2_mask &= ~ (MONO_ARCH_INST_SREG2_MASK (spec));
+               sreg_masks [1] &= ~ (MONO_ARCH_INST_SREG2_MASK (spec));
 
 #ifdef MONO_ARCH_INST_FIXED_MASK
-               sreg1_fixed_mask = MONO_ARCH_INST_FIXED_MASK (spec_src1);
-               sreg2_fixed_mask = MONO_ARCH_INST_FIXED_MASK (spec_src2);
                dreg_fixed_mask = MONO_ARCH_INST_FIXED_MASK (spec_dest);
 #else
-               sreg1_fixed_mask = sreg2_fixed_mask = dreg_fixed_mask = 0;
+               dreg_fixed_mask = 0;
 #endif
 
+               num_sregs = mono_inst_get_src_registers (ins, sregs);
+
                /*
-                * TRACK FIXED SREG2
+                * TRACK FIXED SREG2, 3, ...
                 */
-               if (dest_sreg2 != -1) {
-                       if (rs->ifree_mask & (regmask (dest_sreg2))) {
-                               if (is_global_ireg (ins->sreg2)) {
-                                       /* Argument already in hard reg, need to copy */
-                                       MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg2, ins->sreg2, NULL, ip, FALSE);
-                                       insert_before_ins (bb, ins, copy);
-                               }
-                               else {
-                                       val = rs->vassign [ins->sreg2];
-                                       if (val == -1) {
-                                               DEBUG (printf ("\tshortcut assignment of R%d to %s\n", ins->sreg2, mono_arch_regname (dest_sreg2)));
-                                               assign_reg (cfg, rs, ins->sreg2, dest_sreg2, FALSE);
-                                       } else if (val < -1) {
-                                               /* FIXME: */
-                                               g_assert_not_reached ();
-                                       } else {
+               for (j = 1; j < num_sregs; ++j) {
+                       int sreg = sregs [j];
+                       int dest_sreg = dest_sregs [j];
+                       if (dest_sreg != -1) {
+                               if (rs->ifree_mask & (regmask (dest_sreg))) {
+                                       if (is_global_ireg (sreg)) {
+                                               int k;
                                                /* Argument already in hard reg, need to copy */
-                                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg2, val, NULL, ip, FALSE);
+                                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, sreg, NULL, ip, 0);
                                                insert_before_ins (bb, ins, copy);
+                                               for (k = 0; k < num_sregs; ++k) {
+                                                       if (k != j)
+                                                               sreg_masks [k] &= ~ (regmask (dest_sreg));
+                                               }
+                                       }
+                                       else {
+                                               val = rs->vassign [sreg];
+                                               if (val == -1) {
+                                                       DEBUG (printf ("\tshortcut assignment of R%d to %s\n", sreg, mono_arch_regname (dest_sreg)));
+                                                       assign_reg (cfg, rs, sreg, dest_sreg, 0);
+                                               } else if (val < -1) {
+                                                       /* FIXME: */
+                                                       g_assert_not_reached ();
+                                               } else {
+                                                       /* Argument already in hard reg, need to copy */
+                                                       MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, val, NULL, ip, 0);
+                                                       int k;
+
+                                                       insert_before_ins (bb, ins, copy);
+                                                       for (k = 0; k < num_sregs; ++k) {
+                                                               if (k != j)
+                                                                       sreg_masks [k] &= ~ (regmask (dest_sreg));
+                                                       }
+                                                       /* 
+                                                        * Prevent the dreg from being allocate to dest_sreg 
+                                                        * too, since it could force sreg1 to be allocated to 
+                                                        * the same reg on x86.
+                                                        */
+                                                       dreg_mask &= ~ (regmask (dest_sreg));
+                                               }
+                                       }
+                               } else {
+                                       gboolean need_spill = TRUE;
+                                       gboolean need_assign = TRUE;
+                                       int k;
+
+                                       dreg_mask &= ~ (regmask (dest_sreg));
+                                       for (k = 0; k < num_sregs; ++k) {
+                                               if (k != j)
+                                                       sreg_masks [k] &= ~ (regmask (dest_sreg));
                                        }
-                               }
-                       } else {
-                               gboolean need_spill = TRUE;
-                               gboolean need_assign = TRUE;
-
-                               dreg_mask &= ~ (regmask (dest_sreg2));
-                               sreg1_mask &= ~ (regmask (dest_sreg2));
 
-                               /* 
-                                * First check if dreg is assigned to dest_sreg2, since we
-                                * can't spill a dreg.
-                                */
-                               val = rs->vassign [ins->dreg];
-                               if (val == dest_sreg2 && ins->dreg != ins->sreg2) {
                                        /* 
-                                        * the destination register is already assigned to 
-                                        * dest_sreg2: we need to allocate another register for it 
-                                        * and then copy from this to dest_sreg2.
+                                        * First check if dreg is assigned to dest_sreg2, since we
+                                        * can't spill a dreg.
                                         */
-                                       int new_dest;
-                                       new_dest = alloc_int_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, &reginfo [ins->dreg]);
-                                       g_assert (new_dest >= 0);
-                                       DEBUG (printf ("\tchanging dreg R%d to %s from %s\n", ins->dreg, mono_arch_regname (new_dest), mono_arch_regname (dest_sreg2)));
-
-                                       prev_dreg = ins->dreg;
-                                       assign_reg (cfg, rs, ins->dreg, new_dest, FALSE);
-                                       clob_dreg = ins->dreg;
-                                       create_copy_ins (cfg, bb, tmp, dest_sreg2, new_dest, ins, ip, FALSE);
-                                       mono_regstate_free_int (rs, dest_sreg2);
-                                       need_spill = FALSE;
-                               }
-
-                               if (is_global_ireg (ins->sreg2)) {
-                                       MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg2, ins->sreg2, NULL, ip, FALSE);
-                                       insert_before_ins (bb, ins, copy);
-                                       need_assign = FALSE;
-                               }
-                               else {
-                                       val = rs->vassign [ins->sreg2];
-                                       if (val == dest_sreg2) {
-                                               /* sreg2 is already assigned to the correct register */
-                                               need_spill = FALSE;
-                                       } else if (val < -1) {
-                                               /* sreg2 is spilled, it can be assigned to dest_sreg2 */
-                                       } else if (val >= 0) {
-                                               /* sreg2 already assigned to another register */
-                                               /*
-                                                * We couldn't emit a copy from val to dest_sreg2, because
-                                                * val might be spilled later while processing this 
-                                                * instruction. So we spill sreg2 so it can be allocated to
-                                                * dest_sreg2.
+                                       val = rs->vassign [ins->dreg];
+                                       if (val == dest_sreg && ins->dreg != sreg) {
+                                               /* 
+                                                * the destination register is already assigned to 
+                                                * dest_sreg2: we need to allocate another register for it 
+                                                * and then copy from this to dest_sreg2.
                                                 */
-                                               DEBUG (printf ("\tforced spill of R%d\n", ins->sreg2));
-                                               free_up_reg (cfg, bb, tmp, ins, val, FALSE);
+                                               int new_dest;
+                                               new_dest = alloc_int_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, &reginfo [ins->dreg]);
+                                               g_assert (new_dest >= 0);
+                                               DEBUG (printf ("\tchanging dreg R%d to %s from %s\n", ins->dreg, mono_arch_regname (new_dest), mono_arch_regname (dest_sreg)));
+
+                                               prev_dreg = ins->dreg;
+                                               assign_reg (cfg, rs, ins->dreg, new_dest, 0);
+                                               clob_dreg = ins->dreg;
+                                               create_copy_ins (cfg, bb, tmp, dest_sreg, new_dest, ins, ip, 0);
+                                               mono_regstate_free_int (rs, dest_sreg);
+                                               need_spill = FALSE;
                                        }
-                               }
 
-                               if (need_spill) {
-                                       DEBUG (printf ("\tforced spill of R%d\n", rs->isymbolic [dest_sreg2]));
-                                       free_up_reg (cfg, bb, tmp, ins, dest_sreg2, FALSE);
-                               }
+                                       if (is_global_ireg (sreg)) {
+                                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, sreg, NULL, ip, 0);
+                                               insert_before_ins (bb, ins, copy);
+                                               need_assign = FALSE;
+                                       }
+                                       else {
+                                               val = rs->vassign [sreg];
+                                               if (val == dest_sreg) {
+                                                       /* sreg2 is already assigned to the correct register */
+                                                       need_spill = FALSE;
+                                               } else if (val < -1) {
+                                                       /* sreg2 is spilled, it can be assigned to dest_sreg2 */
+                                               } else if (val >= 0) {
+                                                       /* sreg2 already assigned to another register */
+                                                       /*
+                                                        * We couldn't emit a copy from val to dest_sreg2, because
+                                                        * val might be spilled later while processing this 
+                                                        * instruction. So we spill sreg2 so it can be allocated to
+                                                        * dest_sreg2.
+                                                        */
+                                                       DEBUG (printf ("\tforced spill of R%d\n", sreg));
+                                                       free_up_reg (cfg, bb, tmp, ins, val, 0);
+                                               }
+                                       }
 
-                               if (need_assign) {
-                                       if (rs->vassign [ins->sreg2] < -1) {
-                                               MonoInst *store;
-                                               int spill;
+                                       if (need_spill) {
+                                               DEBUG (printf ("\tforced spill of R%d\n", rs->isymbolic [dest_sreg]));
+                                               free_up_reg (cfg, bb, tmp, ins, dest_sreg, 0);
+                                       }
 
-                                               /* Need to emit a spill store */
-                                               spill = - rs->vassign [ins->sreg2] - 1;
-                                               store = create_spilled_store (cfg, bb, spill, dest_sreg2, ins->sreg2, tmp, NULL, fp);                                           
-                                               insert_before_ins (bb, ins, store);
+                                       if (need_assign) {
+                                               if (rs->vassign [sreg] < -1) {
+                                                       MonoInst *store;
+                                                       int spill;
+
+                                                       /* Need to emit a spill store */
+                                                       spill = - rs->vassign [sreg] - 1;
+                                                       store = create_spilled_store (cfg, bb, spill, dest_sreg, sreg, tmp, NULL, bank);
+                                                       insert_before_ins (bb, ins, store);
+                                               }
+                                               /* force-set sreg2 */
+                                               assign_reg (cfg, rs, sregs [j], dest_sreg, 0);
                                        }
-                                       /* force-set sreg2 */
-                                       assign_reg (cfg, rs, ins->sreg2, dest_sreg2, FALSE);
                                }
+                               sregs [j] = dest_sreg;
                        }
-                       ins->sreg2 = dest_sreg2;
                }
+               mono_inst_set_src_registers (ins, sregs);
 
                /*
                 * TRACK DREG
                 */
-               fp = dreg_is_fp (spec);
-               if (spec_dest && is_soft_reg (ins->dreg, fp)) {
+               bank = dreg_bank (spec);
+               if (spec_dest && is_soft_reg (ins->dreg, bank)) {
                        prev_dreg = ins->dreg;
                }
 
@@ -1243,15 +1402,17 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                         * The dest reg is read by the instruction, not written, so
                         * avoid allocating sreg1/sreg2 to the same reg.
                         */
-                       if (!dest_sreg1 != -1)
-                               dreg_mask &= ~ (regmask (dest_sreg1));
-                       if (dest_sreg2 != -1)
-                               dreg_mask &= ~ (regmask (dest_sreg2));
+                       if (dest_sregs [0] != -1)
+                               dreg_mask &= ~ (regmask (dest_sregs [0]));
+                       for (j = 1; j < num_sregs; ++j) {
+                               if (dest_sregs [j] != -1)
+                                       dreg_mask &= ~ (regmask (dest_sregs [j]));
+                       }
 
                        val = rs->vassign [ins->dreg];
-                       if (is_soft_reg (ins->dreg, fp) && (val >= 0) && (!(regmask (val) & dreg_mask))) {
+                       if (is_soft_reg (ins->dreg, bank) && (val >= 0) && (!(regmask (val) & dreg_mask))) {
                                /* DREG is already allocated to a register needed for sreg1 */
-                               get_register_force_spilling (cfg, bb, tmp, ins, ins->dreg, FALSE);
+                               get_register_force_spilling (cfg, bb, tmp, ins, ins->dreg, 0);
                                mono_regstate_free_int (rs, val);
                        }
                }
@@ -1263,23 +1424,23 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                if (MONO_ARCH_INST_IS_REGPAIR (spec_dest)) {
                        guint32 dreg2, dest_dreg2;
 
-                       g_assert (is_soft_reg (ins->dreg, fp));
+                       g_assert (is_soft_reg (ins->dreg, bank));
 
                        if (dest_dreg != -1) {
                                if (rs->vassign [ins->dreg] != dest_dreg)
-                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, FALSE);
+                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, 0);
 
                                dreg2 = ins->dreg + 1;
                                dest_dreg2 = MONO_ARCH_INST_REGPAIR_REG2 (spec_dest, dest_dreg);
                                if (dest_dreg2 != -1) {
                                        if (rs->vassign [dreg2] != dest_dreg2)
-                                               free_up_reg (cfg, bb, tmp, ins, dest_dreg2, FALSE);
+                                               free_up_reg (cfg, bb, tmp, ins, dest_dreg2, 0);
                                }
                        }
                }
 
                if (dreg_fixed_mask) {
-                       g_assert (!fp);
+                       g_assert (!bank);
                        if (is_global_ireg (ins->dreg)) {
                                /* 
                                 * The argument is already in a hard reg, but that reg is
@@ -1287,7 +1448,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                 */
                                val = mono_regstate_alloc_int (rs, dreg_fixed_mask);
                                if (val < 0)
-                                       val = get_register_spilling (cfg, bb, tmp, ins, dreg_fixed_mask, -1, fp);
+                                       val = get_register_spilling (cfg, bb, tmp, ins, dreg_fixed_mask, -1, bank);
                                mono_regstate_free_int (rs, val);
                                dest_dreg = val;
 
@@ -1297,7 +1458,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                dreg_mask &= dreg_fixed_mask;
                }
 
-               if (is_soft_reg (ins->dreg, fp)) {
+               if (is_soft_reg (ins->dreg, bank)) {
                        val = rs->vassign [ins->dreg];
 
                        if (val < 0) {
@@ -1306,13 +1467,13 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        /* the register gets spilled after this inst */
                                        spill = -val -1;
                                }
-                               val = alloc_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, &reginfo [ins->dreg], fp);
-                               assign_reg (cfg, rs, ins->dreg, val, fp);
+                               val = alloc_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, &reginfo [ins->dreg], bank);
+                               assign_reg (cfg, rs, ins->dreg, val, bank);
                                if (spill)
-                                       create_spilled_store (cfg, bb, spill, val, prev_dreg, tmp, ins, fp);
+                                       create_spilled_store (cfg, bb, spill, val, prev_dreg, tmp, ins, bank);
                        }
 
-                       DEBUG (printf ("\tassigned dreg %s to dest R%d\n", mono_regname_full (val, fp), ins->dreg));
+                       DEBUG (printf ("\tassigned dreg %s to dest R%d\n", mono_regname_full (val, bank), ins->dreg));
                        ins->dreg = val;
                }
 
@@ -1320,11 +1481,11 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                if (MONO_ARCH_INST_IS_REGPAIR (spec_dest)) {
                        int reg2 = prev_dreg + 1;
 
-                       g_assert (!fp);
+                       g_assert (!bank);
                        g_assert (prev_dreg > -1);
                        g_assert (!is_global_ireg (rs->vassign [prev_dreg]));
                        mask = regpair_reg2_mask (spec_dest, rs->vassign [prev_dreg]);
-#ifdef __i386__
+#ifdef TARGET_X86
                        /* bug #80489 */
                        mask &= ~regmask (X86_ECX);
 #endif
@@ -1337,36 +1498,36 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                }
                                val = mono_regstate_alloc_int (rs, mask);
                                if (val < 0)
-                                       val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, fp);
+                                       val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
                                if (spill)
-                                       create_spilled_store (cfg, bb, spill, val, reg2, tmp, ins, fp);
+                                       create_spilled_store (cfg, bb, spill, val, reg2, tmp, ins, bank);
                        }
                        else {
                                if (! (mask & (regmask (val)))) {
                                        val = mono_regstate_alloc_int (rs, mask);
                                        if (val < 0)
-                                               val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, fp);
+                                               val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
 
                                        /* Reallocate hreg to the correct register */
-                                       create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, fp);
+                                       create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, bank);
 
                                        mono_regstate_free_int (rs, rs->vassign [reg2]);
                                }
                        }                                       
 
                        DEBUG (printf ("\tassigned dreg-high %s to dest R%d\n", mono_arch_regname (val), reg2));
-                       assign_reg (cfg, rs, reg2, val, fp);
+                       assign_reg (cfg, rs, reg2, val, bank);
 
                        dreg_high = val;
                        ins->backend.reg3 = val;
 
-                       if (reg_is_freeable (val, fp) && reg2 >= 0 && (reginfo [reg2].born_in >= i)) {
+                       if (reg_is_freeable (val, bank) && reg2 >= 0 && (reginfo [reg2].born_in >= i)) {
                                DEBUG (printf ("\tfreeable %s (R%d)\n", mono_arch_regname (val), reg2));
                                mono_regstate_free_int (rs, val);
                        }
                }
 
-               if (prev_dreg >= 0 && is_soft_reg (prev_dreg, fp) && (spec_dest != 'b') && (cfg->new_ir || reginfo [prev_dreg].born_in >= i)) {
+               if (prev_dreg >= 0 && is_soft_reg (prev_dreg, bank) && (spec_dest != 'b')) {
                        /* 
                         * In theory, we could free up the hreg even if the vreg is alive,
                         * but branches inside bblocks force us to assign the same hreg
@@ -1374,27 +1535,30 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                         */
                        int dreg = rs->vassign [prev_dreg];
                        g_assert (dreg >= 0);
-                       DEBUG (printf ("\tfreeable %s (R%d) (born in %d)\n", mono_regname_full (dreg, fp), prev_dreg, reginfo [prev_dreg].born_in));
-                       if (fp)
-                               mono_regstate_free_float (rs, dreg);
+                       DEBUG (printf ("\tfreeable %s (R%d) (born in %d)\n", mono_regname_full (dreg, bank), prev_dreg, reginfo [prev_dreg].born_in));
+                       if (G_UNLIKELY (bank))
+                               mono_regstate_free_general (rs, dreg, bank);
                        else
                                mono_regstate_free_int (rs, dreg);
-                       if (cfg->new_ir)
-                               rs->vassign [prev_dreg] = -1;
+                       rs->vassign [prev_dreg] = -1;
                }
 
                if ((dest_dreg != -1) && (ins->dreg != dest_dreg)) {
                        /* this instruction only outputs to dest_dreg, need to copy */
-                       create_copy_ins (cfg, bb, tmp, ins->dreg, dest_dreg, ins, ip, fp);
+                       create_copy_ins (cfg, bb, tmp, ins->dreg, dest_dreg, ins, ip, bank);
                        ins->dreg = dest_dreg;
 
-                       if (fp) {
-                               if (rs->fsymbolic [dest_dreg] >= MONO_MAX_FREGS)
-                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, fp);
+                       if (G_UNLIKELY (bank)) {
+                               /* the register we need to free up may be used in another logical regbank
+                                * so do a translate just in case.
+                                */
+                               int translated_bank = translate_bank (cfg->rs, bank, dest_dreg);
+                               if (rs->symbolic [translated_bank] [dest_dreg] >= regbank_size [translated_bank])
+                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, translated_bank);
                        }
                        else {
                                if (rs->isymbolic [dest_dreg] >= MONO_MAX_IREGS)
-                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, fp);
+                                       free_up_reg (cfg, bb, tmp, ins, dest_dreg, bank);
                        }
                }
 
@@ -1403,10 +1567,9 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                         * The dest reg is read by the instruction, not written, so
                         * avoid allocating sreg1/sreg2 to the same reg.
                         */
-                       if (!sreg1_is_fp (spec))
-                               sreg1_mask &= ~ (regmask (ins->dreg));
-                       if (!sreg2_is_fp (spec))
-                               sreg2_mask &= ~ (regmask (ins->dreg));
+                       for (j = 0; j < num_sregs; ++j)
+                               if (!sreg_bank (j, spec))
+                                       sreg_masks [j] &= ~ (regmask (ins->dreg));
                }
 
                /*
@@ -1414,12 +1577,12 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                 */
                if ((clob_reg != -1) && (!(rs->ifree_mask & (regmask (clob_reg))))) {
                        DEBUG (printf ("\tforced spill of clobbered reg R%d\n", rs->isymbolic [clob_reg]));
-                       get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [clob_reg], FALSE);
+                       get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [clob_reg], 0);
                        mono_regstate_free_int (rs, clob_reg);
                }
 
                if (spec [MONO_INST_CLOB] == 'c') {
-                       int j, s, dreg, dreg2;
+                       int j, s, dreg, dreg2, cur_bank;
                        guint64 clob_mask;
 
                        clob_mask = MONO_ARCH_CALLEE_REGS;
@@ -1429,7 +1592,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                 * Need to avoid spilling the dreg since the dreg is not really
                                 * clobbered by the call.
                                 */
-                               if ((prev_dreg != -1) && !reg_is_fp (spec_dest))
+                               if ((prev_dreg != -1) && !reg_bank (spec_dest))
                                        dreg = rs->vassign [prev_dreg];
                                else
                                        dreg = -1;
@@ -1443,7 +1606,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        s = regmask (j);
                                        if ((clob_mask & s) && !(rs->ifree_mask & s) && (j != ins->sreg1)) {
                                                if ((j != dreg) && (j != dreg2))
-                                                       get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [j], FALSE);
+                                                       get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [j], 0);
                                                else if (rs->isymbolic [j])
                                                        /* The hreg is assigned to the dreg of this instruction */
                                                        rs->vassign [rs->isymbolic [j]] = -1;
@@ -1452,22 +1615,32 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                }
                        }
 
-                       if (rs->ffree_mask != MONO_ARCH_CALLEE_FREGS) {
-                               clob_mask = MONO_ARCH_CALLEE_FREGS;
-                               if ((prev_dreg != -1) && reg_is_fp (spec_dest))
-                                       dreg = rs->vassign [prev_dreg];
-                               else
-                                       dreg = -1;
+                       for (cur_bank = 1; cur_bank < MONO_NUM_REGBANKS; ++ cur_bank) {
+                               if (rs->free_mask [cur_bank] != regbank_callee_regs [cur_bank]) {
+                                       clob_mask = regbank_callee_regs [cur_bank];
+                                       if ((prev_dreg != -1) && reg_bank (spec_dest))
+                                               dreg = rs->vassign [prev_dreg];
+                                       else
+                                               dreg = -1;
 
-                               for (j = 0; j < MONO_MAX_FREGS; ++j) {
-                                       s = regmask (j);
-                                       if ((clob_mask & s) && !(rs->ffree_mask & s) && (j != ins->sreg1)) {
-                                               if (j != dreg)
-                                                       get_register_force_spilling (cfg, bb, tmp, ins, rs->fsymbolic [j], TRUE);
-                                               else if (rs->fsymbolic [j])
-                                                       /* The hreg is assigned to the dreg of this instruction */
-                                                       rs->vassign [rs->fsymbolic [j]] = -1;
-                                               mono_regstate_free_float (rs, j);
+                                       for (j = 0; j < regbank_size [cur_bank]; ++j) {
+
+                                               /* we are looping though the banks in the outer loop
+                                                * so, we don't need to deal with mirrored hregs
+                                                * because we will get them in one of the other bank passes.
+                                                */
+                                               if (is_hreg_mirrored (rs, cur_bank, j))
+                                                       continue;
+
+                                               s = regmask (j);
+                                               if ((clob_mask & s) && !(rs->free_mask [cur_bank] & s) && (j != ins->sreg1)) {
+                                                       if (j != dreg)
+                                                               get_register_force_spilling (cfg, bb, tmp, ins, rs->symbolic [cur_bank] [j], cur_bank);
+                                                       else if (rs->symbolic [cur_bank] [j])
+                                                               /* The hreg is assigned to the dreg of this instruction */
+                                                               rs->vassign [rs->symbolic [cur_bank] [j]] = -1;
+                                                       mono_regstate_free_general (rs, j, cur_bank);
+                                               }
                                        }
                                }
                        }
@@ -1476,7 +1649,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                /*
                 * TRACK ARGUMENT REGS
                 */
-               if (spec [MONO_INST_CLOB] == 'c') {
+               if (spec [MONO_INST_CLOB] == 'c' && MONO_IS_CALL (ins)) {
                        MonoCallInst *call = (MonoCallInst*)ins;
                        GSList *list;
 
@@ -1500,9 +1673,9 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        hreg = regpair >> 24;
                                        reg = regpair & 0xffffff;
 
-                                       assign_reg (cfg, rs, reg, hreg, FALSE);
+                                       assign_reg (cfg, rs, reg, hreg, 0);
 
-                                       sreg1_mask &= ~(regmask (hreg));
+                                       sreg_masks [0] &= ~(regmask (hreg));
 
                                        DEBUG (printf ("\tassigned arg reg %s to R%d\n", mono_arch_regname (hreg), reg));
 
@@ -1520,9 +1693,9 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        hreg = regpair >> 24;
                                        reg = regpair & 0xffffff;
 
-                                       assign_reg (cfg, rs, reg, hreg, TRUE);
+                                       assign_reg (cfg, rs, reg, hreg, 1);
 
-                                       DEBUG (printf ("\tassigned arg reg %s to R%d\n", mono_arch_fregname (hreg), reg));
+                                       DEBUG (printf ("\tassigned arg reg %s to R%d\n", mono_regname_full (hreg, 1), reg));
 
                                        list = g_slist_next (list);
                                }
@@ -1532,9 +1705,12 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                /*
                 * TRACK SREG1
                 */
-               fp = sreg1_is_fp (spec);
+               bank = sreg1_bank (spec);
                if (MONO_ARCH_INST_IS_REGPAIR (spec_dest) && (spec [MONO_INST_CLOB] == '1')) {
-                       g_assert (is_soft_reg (ins->sreg1, fp));
+                       int sreg1 = sregs [0];
+                       int dest_sreg1 = dest_sregs [0];
+
+                       g_assert (is_soft_reg (sreg1, bank));
 
                        /* To simplify things, we allocate the same regpair to sreg1 and dreg */
                        if (dest_sreg1 != -1)
@@ -1542,68 +1718,68 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                        val = mono_regstate_alloc_int (rs, regmask (ins->dreg));
                        g_assert (val >= 0);
 
-                       if (rs->vassign [ins->sreg1] >= 0 && rs->vassign [ins->sreg1] != val)
+                       if (rs->vassign [sreg1] >= 0 && rs->vassign [sreg1] != val)
                                // FIXME:
                                g_assert_not_reached ();
 
-                       assign_reg (cfg, rs, ins->sreg1, val, fp);
+                       assign_reg (cfg, rs, sreg1, val, bank);
 
-                       DEBUG (printf ("\tassigned sreg1-low %s to R%d\n", mono_regname_full (val, fp), ins->sreg1));
+                       DEBUG (printf ("\tassigned sreg1-low %s to R%d\n", mono_regname_full (val, bank), sreg1));
 
                        g_assert ((regmask (dreg_high)) & regpair_reg2_mask (spec_src1, ins->dreg));
                        val = mono_regstate_alloc_int (rs, regmask (dreg_high));
                        g_assert (val >= 0);
 
-                       if (rs->vassign [ins->sreg1 + 1] >= 0 && rs->vassign [ins->sreg1 + 1] != val)
+                       if (rs->vassign [sreg1 + 1] >= 0 && rs->vassign [sreg1 + 1] != val)
                                // FIXME:
                                g_assert_not_reached ();
 
-                       assign_reg (cfg, rs, ins->sreg1 + 1, val, fp);
+                       assign_reg (cfg, rs, sreg1 + 1, val, bank);
 
-                       DEBUG (printf ("\tassigned sreg1-high %s to R%d\n", mono_regname_full (val, fp), ins->sreg1 + 1));
+                       DEBUG (printf ("\tassigned sreg1-high %s to R%d\n", mono_regname_full (val, bank), sreg1 + 1));
 
                        /* Skip rest of this section */
-                       dest_sreg1 = -1;
+                       dest_sregs [0] = -1;
                }
 
-               if (sreg1_fixed_mask) {
-                       g_assert (!fp);
-                       if (is_global_ireg (ins->sreg1)) {
+               if (sreg_fixed_masks [0]) {
+                       g_assert (!bank);
+                       if (is_global_ireg (sregs [0])) {
                                /* 
                                 * The argument is already in a hard reg, but that reg is
                                 * not usable by this instruction, so allocate a new one.
                                 */
-                               val = mono_regstate_alloc_int (rs, sreg1_fixed_mask);
+                               val = mono_regstate_alloc_int (rs, sreg_fixed_masks [0]);
                                if (val < 0)
-                                       val = get_register_spilling (cfg, bb, tmp, ins, sreg1_fixed_mask, -1, fp);
+                                       val = get_register_spilling (cfg, bb, tmp, ins, sreg_fixed_masks [0], -1, bank);
                                mono_regstate_free_int (rs, val);
-                               dest_sreg1 = val;
+                               dest_sregs [0] = val;
 
                                /* Fall through to the dest_sreg1 != -1 case */
                        }
                        else
-                               sreg1_mask &= sreg1_fixed_mask;
+                               sreg_masks [0] &= sreg_fixed_masks [0];
                }
 
-               if (dest_sreg1 != -1) {
-                       sreg1_mask = regmask (dest_sreg1);
+               if (dest_sregs [0] != -1) {
+                       sreg_masks [0] = regmask (dest_sregs [0]);
 
-                       if ((rs->vassign [ins->sreg1] != dest_sreg1) && !(rs->ifree_mask & (regmask (dest_sreg1)))) {
-                               DEBUG (printf ("\tforced spill of R%d\n", rs->isymbolic [dest_sreg1]));
-                               get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [dest_sreg1], FALSE);
-                               mono_regstate_free_int (rs, dest_sreg1);
+                       if ((rs->vassign [sregs [0]] != dest_sregs [0]) && !(rs->ifree_mask & (regmask (dest_sregs [0])))) {
+                               DEBUG (printf ("\tforced spill of R%d\n", rs->isymbolic [dest_sregs [0]]));
+                               get_register_force_spilling (cfg, bb, tmp, ins, rs->isymbolic [dest_sregs [0]], 0);
+                               mono_regstate_free_int (rs, dest_sregs [0]);
                        }
-                       if (is_global_ireg (ins->sreg1)) {
+                       if (is_global_ireg (sregs [0])) {
                                /* The argument is already in a hard reg, need to copy */
-                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg1, ins->sreg1, NULL, ip, FALSE);
+                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sregs [0], sregs [0], NULL, ip, 0);
                                insert_before_ins (bb, ins, copy);
-                               ins->sreg1 = dest_sreg1;
+                               sregs [0] = dest_sregs [0];
                        }
                }
 
-               if (is_soft_reg (ins->sreg1, fp)) {
-                       val = rs->vassign [ins->sreg1];
-                       prev_sreg1 = ins->sreg1;
+               if (is_soft_reg (sregs [0], bank)) {
+                       val = rs->vassign [sregs [0]];
+                       prev_sregs [0] = sregs [0];
                        if (val < 0) {
                                int spill = 0;
                                if (val < -1) {
@@ -1611,24 +1787,24 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        spill = -val -1;
                                }
 
-                               if ((ins->opcode == OP_MOVE) && !spill && !fp && is_local_ireg (ins->dreg) && (rs->ifree_mask & (regmask (ins->dreg)))) {
+                               if ((ins->opcode == OP_MOVE) && !spill && !bank && is_local_ireg (ins->dreg) && (rs->ifree_mask & (regmask (ins->dreg)))) {
                                        /* 
                                         * Allocate the same hreg to sreg1 as well so the 
                                         * peephole can get rid of the move.
                                         */
-                                       sreg1_mask = regmask (ins->dreg);
+                                       sreg_masks [0] = regmask (ins->dreg);
                                }
 
-                               if (spec [MONO_INST_CLOB] == '1' && !dreg_is_fp (spec) && (rs->ifree_mask & (regmask (ins->dreg))))
+                               if (spec [MONO_INST_CLOB] == '1' && !dreg_bank (spec) && (rs->ifree_mask & (regmask (ins->dreg))))
                                        /* Allocate the same reg to sreg1 to avoid a copy later */
-                                       sreg1_mask = regmask (ins->dreg);
+                                       sreg_masks [0] = regmask (ins->dreg);
 
-                               val = alloc_reg (cfg, bb, tmp, ins, sreg1_mask, ins->sreg1, &reginfo [ins->sreg1], fp);
-                               assign_reg (cfg, rs, ins->sreg1, val, fp);
-                               DEBUG (printf ("\tassigned sreg1 %s to R%d\n", mono_regname_full (val, fp), ins->sreg1));
+                               val = alloc_reg (cfg, bb, tmp, ins, sreg_masks [0], sregs [0], &reginfo [sregs [0]], bank);
+                               assign_reg (cfg, rs, sregs [0], val, bank);
+                               DEBUG (printf ("\tassigned sreg1 %s to R%d\n", mono_regname_full (val, bank), sregs [0]));
 
                                if (spill) {
-                                       MonoInst *store = create_spilled_store (cfg, bb, spill, val, prev_sreg1, tmp, NULL, fp);
+                                       MonoInst *store = create_spilled_store (cfg, bb, spill, val, prev_sregs [0], tmp, NULL, bank);
                                        /*
                                         * Need to insert before the instruction since it can
                                         * overwrite sreg1.
@@ -1636,28 +1812,32 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                        insert_before_ins (bb, ins, store);
                                }
                        }
-                       else if ((dest_sreg1 != -1) && (dest_sreg1 != val)) {
-                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg1, val, NULL, ip, fp);
+                       else if ((dest_sregs [0] != -1) && (dest_sregs [0] != val)) {
+                               MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sregs [0], val, NULL, ip, bank);
                                insert_before_ins (bb, ins, copy);
-                               sreg2_mask &= ~(regmask (dest_sreg1));
-                               val = dest_sreg1;
+                               for (j = 1; j < num_sregs; ++j)
+                                       sreg_masks [j] &= ~(regmask (dest_sregs [0]));
+                               val = dest_sregs [0];
                        }
                                
-                       ins->sreg1 = val;
+                       sregs [0] = val;
                }
                else {
-                       prev_sreg1 = -1;
+                       prev_sregs [0] = -1;
                }
-               sreg2_mask &= ~(regmask (ins->sreg1));
+               mono_inst_set_src_registers (ins, sregs);
+
+               for (j = 1; j < num_sregs; ++j)
+                       sreg_masks [j] &= ~(regmask (sregs [0]));
 
                /* Handle the case when sreg1 is a regpair but dreg is not */
                if (MONO_ARCH_INST_IS_REGPAIR (spec_src1) && (spec [MONO_INST_CLOB] != '1')) {
-                       int reg2 = prev_sreg1 + 1;
+                       int reg2 = prev_sregs [0] + 1;
 
-                       g_assert (!fp);
-                       g_assert (prev_sreg1 > -1);
-                       g_assert (!is_global_ireg (rs->vassign [prev_sreg1]));
-                       mask = regpair_reg2_mask (spec_src1, rs->vassign [prev_sreg1]);
+                       g_assert (!bank);
+                       g_assert (prev_sregs [0] > -1);
+                       g_assert (!is_global_ireg (rs->vassign [prev_sregs [0]]));
+                       mask = regpair_reg2_mask (spec_src1, rs->vassign [prev_sregs [0]]);
                        val = rs->vassign [reg2];
                        if (val < 0) {
                                int spill = 0;
@@ -1667,7 +1847,7 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                }
                                val = mono_regstate_alloc_int (rs, mask);
                                if (val < 0)
-                                       val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, fp);
+                                       val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
                                if (spill)
                                        g_assert_not_reached ();
                        }
@@ -1679,10 +1859,10 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
 #if 0
                                        val = mono_regstate_alloc_int (rs, mask);
                                        if (val < 0)
-                                               val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, fp);
+                                               val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
 
                                        /* Reallocate hreg to the correct register */
-                                       create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, fp);
+                                       create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, bank);
 
                                        mono_regstate_free_int (rs, rs->vassign [reg2]);
 #endif
@@ -1691,35 +1871,35 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
 
                        sreg1_high = val;
                        DEBUG (printf ("\tassigned sreg1 hreg %s to dest R%d\n", mono_arch_regname (val), reg2));
-                       assign_reg (cfg, rs, reg2, val, fp);
+                       assign_reg (cfg, rs, reg2, val, bank);
                }
 
                /* Handle dreg==sreg1 */
-               if (((dreg_is_fp (spec) && spec_src1 == 'f') || spec [MONO_INST_CLOB] == '1') && ins->dreg != ins->sreg1) {
+               if (((dreg_is_fp (spec) && sreg1_is_fp (spec)) || spec [MONO_INST_CLOB] == '1') && ins->dreg != sregs [0]) {
                        MonoInst *sreg2_copy = NULL;
                        MonoInst *copy;
-                       gboolean fp = (spec_src1 == 'f');
+                       int bank = reg_bank (spec_src1);
 
-                       if (ins->dreg == ins->sreg2) {
+                       if (ins->dreg == sregs [1]) {
                                /* 
                                 * copying sreg1 to dreg could clobber sreg2, so allocate a new
                                 * register for it.
                                 */
-                               int reg2 = alloc_reg (cfg, bb, tmp, ins, dreg_mask, ins->sreg2, NULL, fp);
+                               int reg2 = alloc_reg (cfg, bb, tmp, ins, dreg_mask, sregs [1], NULL, bank);
 
-                               DEBUG (printf ("\tneed to copy sreg2 %s to reg %s\n", mono_regname_full (ins->sreg2, fp), mono_regname_full (reg2, fp)));
-                               sreg2_copy = create_copy_ins (cfg, bb, tmp, reg2, ins->sreg2, NULL, ip, fp);
-                               prev_sreg2 = ins->sreg2 = reg2;
+                               DEBUG (printf ("\tneed to copy sreg2 %s to reg %s\n", mono_regname_full (sregs [1], bank), mono_regname_full (reg2, bank)));
+                               sreg2_copy = create_copy_ins (cfg, bb, tmp, reg2, sregs [1], NULL, ip, bank);
+                               prev_sregs [1] = sregs [1] = reg2;
 
-                               if (fp)
-                                       mono_regstate_free_float (rs, reg2);
+                               if (G_UNLIKELY (bank))
+                                       mono_regstate_free_general (rs, reg2, bank);
                                else
                                        mono_regstate_free_int (rs, reg2);
                        }
 
                        if (MONO_ARCH_INST_IS_REGPAIR (spec_src1)) {
                                /* Copying sreg1_high to dreg could also clobber sreg2 */
-                               if (rs->vassign [prev_sreg1 + 1] == ins->sreg2)
+                               if (rs->vassign [prev_sregs [0] + 1] == sregs [1])
                                        /* FIXME: */
                                        g_assert_not_reached ();
 
@@ -1727,12 +1907,12 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                                 * sreg1 and dest are already allocated to the same regpair by the
                                 * SREG1 allocation code.
                                 */
-                               g_assert (ins->sreg1 == ins->dreg);
+                               g_assert (sregs [0] == ins->dreg);
                                g_assert (dreg_high == sreg1_high);
                        }
 
-                       DEBUG (printf ("\tneed to copy sreg1 %s to dreg %s\n", mono_regname_full (ins->sreg1, fp), mono_regname_full (ins->dreg, fp)));
-                       copy = create_copy_ins (cfg, bb, tmp, ins->dreg, ins->sreg1, NULL, ip, fp);
+                       DEBUG (printf ("\tneed to copy sreg1 %s to dreg %s\n", mono_regname_full (sregs [0], bank), mono_regname_full (ins->dreg, bank)));
+                       copy = create_copy_ins (cfg, bb, tmp, ins->dreg, sregs [0], NULL, ip, bank);
                        insert_before_ins (bb, ins, copy);
 
                        if (sreg2_copy)
@@ -1742,44 +1922,52 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                         * Need to prevent sreg2 to be allocated to sreg1, since that
                         * would screw up the previous copy.
                         */
-                       sreg2_mask &= ~ (regmask (ins->sreg1));
+                       sreg_masks [1] &= ~ (regmask (sregs [0]));
                        /* we set sreg1 to dest as well */
-                       prev_sreg1 = ins->sreg1 = ins->dreg;
-                       sreg2_mask &= ~ (regmask (ins->dreg));
+                       prev_sregs [0] = sregs [0] = ins->dreg;
+                       sreg_masks [1] &= ~ (regmask (ins->dreg));
                }
+               mono_inst_set_src_registers (ins, sregs);
 
                /*
-                * TRACK SREG2
+                * TRACK SREG2, 3, ...
                 */
-               fp = sreg2_is_fp (spec);
-               if (MONO_ARCH_INST_IS_REGPAIR (spec_src2))
-                       g_assert_not_reached ();
-               if (is_soft_reg (ins->sreg2, fp)) {
-                       val = rs->vassign [ins->sreg2];
+               for (j = 1; j < num_sregs; ++j) {
+                       int k;
 
-                       if (val < 0) {
-                               int spill = 0;
-                               if (val < -1) {
-                                       /* the register gets spilled after this inst */
-                                       spill = -val -1;
-                               }
-                               val = alloc_reg (cfg, bb, tmp, ins, sreg2_mask, ins->sreg2, &reginfo [ins->sreg2], fp);
-                               assign_reg (cfg, rs, ins->sreg2, val, fp);
-                               DEBUG (printf ("\tassigned sreg2 %s to R%d\n", mono_regname_full (val, fp), ins->sreg2));
-                               if (spill) {
-                                       MonoInst *store = create_spilled_store (cfg, bb, spill, val, prev_sreg2, tmp, NULL, fp);
-                                       /*
-                                        * Need to insert before the instruction since it can
-                                        * overwrite sreg2.
-                                        */
-                                       insert_before_ins (bb, ins, store);
+                       bank = sreg_bank (j, spec);
+                       if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC1 + j]))
+                               g_assert_not_reached ();
+                       if (is_soft_reg (sregs [j], bank)) {
+                               val = rs->vassign [sregs [j]];
+
+                               if (val < 0) {
+                                       int spill = 0;
+                                       if (val < -1) {
+                                               /* the register gets spilled after this inst */
+                                               spill = -val -1;
+                                       }
+                                       val = alloc_reg (cfg, bb, tmp, ins, sreg_masks [j], sregs [j], &reginfo [sregs [j]], bank);
+                                       assign_reg (cfg, rs, sregs [j], val, bank);
+                                       DEBUG (printf ("\tassigned sreg%d %s to R%d\n", j + 1, mono_regname_full (val, bank), sregs [j]));
+                                       if (spill) {
+                                               MonoInst *store = create_spilled_store (cfg, bb, spill, val, prev_sregs [j], tmp, NULL, bank);
+                                               /*
+                                                * Need to insert before the instruction since it can
+                                                * overwrite sreg2.
+                                                */
+                                               insert_before_ins (bb, ins, store);
+                                       }
                                }
+                               sregs [j] = val;
+                               for (k = j + 1; k < num_sregs; ++k)
+                                       sreg_masks [k] &= ~ (regmask (sregs [j]));
+                       }
+                       else {
+                               prev_sregs [j] = -1;
                        }
-                       ins->sreg2 = val;
-               }
-               else {
-                       prev_sreg2 = -1;
                }
+               mono_inst_set_src_registers (ins, sregs);
 
                /*if (reg_is_freeable (ins->sreg1) && prev_sreg1 >= 0 && reginfo [prev_sreg1].born_in >= i) {
                        DEBUG (printf ("freeable %s\n", mono_arch_regname (ins->sreg1)));
@@ -1805,6 +1993,8 @@ mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
                MonoInst *fxch;
                int tmp;
 
+               g_assert (num_sregs <= 2);
+
                for (ins = bb->code; ins; ins = ins->next) {
                        spec = ins_get_spec (ins->opcode);
 
@@ -1952,7 +2142,6 @@ CompRelation
 mono_opcode_to_cond (int opcode)
 {
        switch (opcode) {
-       case CEE_BEQ:
        case OP_CEQ:
        case OP_IBEQ:
        case OP_ICEQ:
@@ -1965,7 +2154,6 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_IEQ:
        case OP_CMOV_LEQ:
                return CMP_EQ;
-       case CEE_BNE_UN:
        case OP_IBNE_UN:
        case OP_LBNE_UN:
        case OP_FBNE_UN:
@@ -1974,21 +2162,18 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_INE_UN:
        case OP_CMOV_LNE_UN:
                return CMP_NE;
-       case CEE_BLE:
        case OP_IBLE:
        case OP_LBLE:
        case OP_FBLE:
        case OP_CMOV_ILE:
        case OP_CMOV_LLE:
                return CMP_LE;
-       case CEE_BGE:
        case OP_IBGE:
        case OP_LBGE:
        case OP_FBGE:
        case OP_CMOV_IGE:
        case OP_CMOV_LGE:
                return CMP_GE;
-       case CEE_BLT:
        case OP_CLT:
        case OP_IBLT:
        case OP_ICLT:
@@ -2001,7 +2186,6 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_ILT:
        case OP_CMOV_LLT:
                return CMP_LT;
-       case CEE_BGT:
        case OP_CGT:
        case OP_IBGT:
        case OP_ICGT:
@@ -2015,7 +2199,6 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_LGT:
                return CMP_GT;
 
-       case CEE_BLE_UN:
        case OP_IBLE_UN:
        case OP_LBLE_UN:
        case OP_FBLE_UN:
@@ -2024,14 +2207,12 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_ILE_UN:
        case OP_CMOV_LLE_UN:
                return CMP_LE_UN;
-       case CEE_BGE_UN:
        case OP_IBGE_UN:
        case OP_LBGE_UN:
        case OP_FBGE_UN:
        case OP_CMOV_IGE_UN:
        case OP_CMOV_LGE_UN:
                return CMP_GE_UN;
-       case CEE_BLT_UN:
        case OP_CLT_UN:
        case OP_IBLT_UN:
        case OP_ICLT_UN:
@@ -2044,7 +2225,6 @@ mono_opcode_to_cond (int opcode)
        case OP_CMOV_ILT_UN:
        case OP_CMOV_LLT_UN:
                return CMP_LT_UN;
-       case CEE_BGT_UN:
        case OP_CGT_UN:
        case OP_IBGT_UN:
        case OP_ICGT_UN:
@@ -2096,9 +2276,7 @@ mono_negate_cond (CompRelation cond)
 CompType
 mono_opcode_to_type (int opcode, int cmp_opcode)
 {
-       if ((opcode >= CEE_BEQ) && (opcode <= CEE_BLT_UN))
-               return CMP_TYPE_L;
-       else if ((opcode >= OP_CEQ) && (opcode <= OP_CLT_UN))
+       if ((opcode >= OP_CEQ) && (opcode <= OP_CLT_UN))
                return CMP_TYPE_L;
        else if ((opcode >= OP_IBEQ) && (opcode <= OP_IBLT_UN))
                return CMP_TYPE_I;
@@ -2129,6 +2307,8 @@ mono_opcode_to_type (int opcode, int cmp_opcode)
        }
 }
 
+#endif /* DISABLE_JIT */
+
 gboolean
 mono_is_regsize_var (MonoType *t)
 {
@@ -2148,7 +2328,7 @@ mono_is_regsize_var (MonoType *t)
        case MONO_TYPE_U:
        case MONO_TYPE_PTR:
        case MONO_TYPE_FNPTR:
-#if SIZEOF_VOID_P == 8
+#if SIZEOF_REGISTER == 8
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
 #endif
@@ -2169,6 +2349,8 @@ mono_is_regsize_var (MonoType *t)
        return FALSE;
 }
 
+#ifndef DISABLE_JIT
+
 /*
  * mono_peephole_ins:
  *
@@ -2288,7 +2470,7 @@ mono_peephole_ins (MonoBasicBlock *bb, MonoInst *ins)
                if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
                        ins->inst_basereg == last_ins->inst_destbasereg &&
                        ins->inst_offset == last_ins->inst_offset) {
-#if SIZEOF_VOID_P == 8
+#if SIZEOF_REGISTER == 8
                        ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? OP_PCONV_TO_I2 : OP_PCONV_TO_U2;
 #else
                        /* The definition of OP_PCONV_TO_U2 is wrong */
@@ -2314,7 +2496,7 @@ mono_peephole_ins (MonoBasicBlock *bb, MonoInst *ins)
                 * OP_MOVE sreg, dreg 
                 * OP_MOVE dreg, sreg
                 */
-               if (last_ins && last_ins->opcode == OP_MOVE &&
+               if (last_ins && last_ins->opcode == ins->opcode &&
                        ins->sreg1 == last_ins->dreg &&
                        ins->dreg == last_ins->sreg1) {
                        MONO_DELETE_INS (bb, ins);
@@ -2326,3 +2508,4 @@ mono_peephole_ins (MonoBasicBlock *bb, MonoInst *ins)
        }
 }
 
+#endif /* DISABLE_JIT */