/* src/vm/jit/x86_64/emit.c - x86_64 code emitter functions
- Copyright (C) 1996-2005, 2006, 2007, 2008
+ Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
#include <assert.h>
#include "vm/types.h"
+#include "vm/os.hpp"
#include "md-abi.h"
#include "vm/jit/x86_64/codegen.h"
#include "vm/jit/x86_64/emit.h"
-#include "mm/memory.h"
+#include "mm/memory.hpp"
#include "threads/lock.hpp"
#include "vm/jit/patcher-common.hpp"
#include "vm/jit/replace.hpp"
#include "vm/jit/trace.hpp"
-#include "vm/jit/trap.h"
+#include "vm/jit/trap.hpp"
/* emit_load *******************************************************************
}
+/**
+ * Emits code updating the condition register by comparing one integer
+ * register to an immediate integer value.
+ */
+void emit_icmp_imm(codegendata* cd, int reg, int32_t value)
+{
+ M_ICMP_IMM(value, reg);
+}
+
+
/* emit_branch *****************************************************************
Emits the code for conditional and unconditional branchs.
}
+/* emit_patcher_alignment ******************************************************
+
+ Emit NOP to ensure placement at an even address.
+
+*******************************************************************************/
+
+void emit_patcher_alignment(codegendata *cd)
+{
+ if ((uintptr_t) cd->mcodeptr & 1)
+ M_NOP;
+}
+
+
/* emit_trap *******************************************************************
Emit a trap instruction and return the original machine code.
}
+/**
+ * Generates fast-path code for the below builtin.
+ * Function: LOCK_monitor_enter
+ * Signature: (Ljava/lang/Object;)V
+ * Slow-path: bool lock_monitor_enter(java_handle_t*);
+ */
+void emit_fastpath_monitor_enter(jitdata* jd, instruction* iptr, int d)
+{
+ // Get required compiler data.
+ codegendata* cd = jd->cd;
+
+ // XXX Currently the fast-path always fails. Implement me!
+ M_CLR(d);
+}
+
+
+/**
+ * Generates fast-path code for the below builtin.
+ * Function: LOCK_monitor_exit
+ * Signature: (Ljava/lang/Object;)V
+ * Slow-path: bool lock_monitor_exit(java_handle_t*);
+ */
+void emit_fastpath_monitor_exit(jitdata* jd, instruction* iptr, int d)
+{
+ // Get required compiler data.
+ codegendata* cd = jd->cd;
+
+ // XXX Currently the fast-path always fails. Implement me!
+ M_CLR(d);
+}
+
+
+/**
+ * Generates synchronization code to enter a monitor.
+ */
+#if defined(ENABLE_THREADS)
+void emit_monitor_enter(jitdata* jd, int32_t syncslot_offset)
+{
+ int32_t p;
+
+ // Get required compiler data.
+ methodinfo* m = jd->m;
+ codegendata* cd = jd->cd;
+
+# if !defined(NDEBUG)
+ if (JITDATA_HAS_FLAG_VERBOSECALL(jd)) {
+ M_LSUB_IMM((INT_ARG_CNT + FLT_ARG_CNT) * 8, REG_SP);
+
+ for (p = 0; p < INT_ARG_CNT; p++)
+ M_LST(abi_registers_integer_argument[p], REG_SP, p * 8);
+
+ for (p = 0; p < FLT_ARG_CNT; p++)
+ M_DST(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);
+
+ syncslot_offset += (INT_ARG_CNT + FLT_ARG_CNT) * 8;
+ }
+# endif
+
+ /* decide which monitor enter function to call */
+
+ if (m->flags & ACC_STATIC) {
+ M_MOV_IMM(&m->clazz->object.header, REG_A0);
+ }
+ else {
+ M_TEST(REG_A0);
+ M_BNE(8);
+ M_ALD_MEM(REG_A0, TRAP_NullPointerException);
+ }
+
+ M_AST(REG_A0, REG_SP, syncslot_offset);
+ M_MOV_IMM(LOCK_monitor_enter, REG_ITMP1);
+ M_CALL(REG_ITMP1);
+
+# if !defined(NDEBUG)
+ if (JITDATA_HAS_FLAG_VERBOSECALL(jd)) {
+
+ for (p = 0; p < INT_ARG_CNT; p++)
+ M_LLD(abi_registers_integer_argument[p], REG_SP, p * 8);
+
+ for (p = 0; p < FLT_ARG_CNT; p++)
+ M_DLD(abi_registers_float_argument[p], REG_SP, (INT_ARG_CNT + p) * 8);
+
+ M_LADD_IMM((INT_ARG_CNT + FLT_ARG_CNT) * 8, REG_SP);
+ }
+# endif
+}
+#endif
+
+
+/**
+ * Generates synchronization code to leave a monitor.
+ */
+#if defined(ENABLE_THREADS)
+void emit_monitor_exit(jitdata* jd, int32_t syncslot_offset)
+{
+ // Get required compiler data.
+ methodinfo* m = jd->m;
+ codegendata* cd = jd->cd;
+
+ M_ALD(REG_A0, REG_SP, syncslot_offset);
+
+ /* we need to save the proper return value */
+
+ methoddesc* md = m->parseddesc;
+
+ switch (md->returntype.type) {
+ case TYPE_INT:
+ case TYPE_ADR:
+ case TYPE_LNG:
+ M_LST(REG_RESULT, REG_SP, syncslot_offset);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DST(REG_FRESULT, REG_SP, syncslot_offset);
+ break;
+ }
+
+ M_MOV_IMM(LOCK_monitor_exit, REG_ITMP1);
+ M_CALL(REG_ITMP1);
+
+ /* and now restore the proper return value */
+
+ switch (md->returntype.type) {
+ case TYPE_INT:
+ case TYPE_ADR:
+ case TYPE_LNG:
+ M_LLD(REG_RESULT, REG_SP, syncslot_offset);
+ break;
+ case TYPE_FLT:
+ case TYPE_DBL:
+ M_DLD(REG_FRESULT, REG_SP, syncslot_offset);
+ break;
+ }
+}
+#endif
+
+
+/**
+ * Emit profiling code for method frequency counting.
+ */
+#if defined(ENABLE_PROFILING)
+void emit_profile_method(codegendata* cd, codeinfo* code)
+{
+ M_MOV_IMM(code, REG_ITMP3);
+ M_IINC_MEMBASE(REG_ITMP3, OFFSET(codeinfo, frequency));
+}
+#endif
+
+
+/**
+ * Emit profiling code for basicblock frequency counting.
+ */
+#if defined(ENABLE_PROFILING)
+void emit_profile_basicblock(codegendata* cd, codeinfo* code, basicblock* bptr)
+{
+ M_MOV_IMM(code->bbfrequency, REG_ITMP3);
+ M_IINC_MEMBASE(REG_ITMP3, bptr->nr * 4);
+}
+#endif
+
+
+/**
+ * Emit profiling code to start CPU cycle counting.
+ */
+#if defined(ENABLE_PROFILING)
+void emit_profile_cycle_start(codegendata* cd, codeinfo* code)
+{
+ M_PUSH(RAX);
+ M_PUSH(RDX);
+
+ M_MOV_IMM(code, REG_ITMP3);
+ M_RDTSC;
+ M_ISUB_MEMBASE(RAX, REG_ITMP3, OFFSET(codeinfo, cycles));
+ M_ISBB_MEMBASE(RDX, REG_ITMP3, OFFSET(codeinfo, cycles) + 4);
+
+ M_POP(RDX);
+ M_POP(RAX);
+}
+#endif
+
+
+/**
+ * Emit profiling code to stop CPU cycle counting.
+ */
+#if defined(ENABLE_PROFILING)
+void emit_profile_cycle_stop(codegendata* cd, codeinfo* code)
+{
+ M_PUSH(RAX);
+ M_PUSH(RDX);
+
+ M_MOV_IMM(code, REG_ITMP3);
+ M_RDTSC;
+ M_IADD_MEMBASE(RAX, REG_ITMP3, OFFSET(codeinfo, cycles));
+ M_IADC_MEMBASE(RDX, REG_ITMP3, OFFSET(codeinfo, cycles) + 4);
+
+ M_POP(RDX);
+ M_POP(RAX);
+}
+#endif
+
+
/* emit_verbosecall_enter ******************************************************
Generates the code for the call trace.
/* low-level code emitter functions *******************************************/
+void emit_nop(codegendata *cd, int length)
+{
+ assert(length >= 1 && length <= 9);
+ switch (length) {
+ case 1:
+ *(cd->mcodeptr++) = 0x90;
+ break;
+ case 2:
+ *(cd->mcodeptr++) = 0x66;
+ *(cd->mcodeptr++) = 0x90;
+ break;
+ case 3:
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 4:
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x40;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 5:
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x44;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 6:
+ *(cd->mcodeptr++) = 0x66;
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x44;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 7:
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x80;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 8:
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x84;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ case 9:
+ *(cd->mcodeptr++) = 0x66;
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0x1f;
+ *(cd->mcodeptr++) = 0x84;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ *(cd->mcodeptr++) = 0x00;
+ break;
+ }
+}
+
void emit_mov_reg_reg(codegendata *cd, s8 reg, s8 dreg)
{
emit_rex(1,(reg),0,(dreg));
*(cd->mcodeptr++) = 0x31;
}
+void emit_mfence(codegendata *cd)
+{
+ *(cd->mcodeptr++) = 0x0f;
+ *(cd->mcodeptr++) = 0xae;
+ *(cd->mcodeptr++) = 0xf0;
+}
+
/*
* These are local overrides for various environment variables in Emacs.
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
projects / cacao.git / blobdiff