/* src/vm/jit/alpha/md-abi.c - functions for Alpha ABI
- Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
- R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
- C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
- Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
- Contact: cacao@complang.tuwien.ac.at
+*/
- Authors: Christian Thalinger
- Changes:
+#include "config.h"
+#include "vm/types.h"
- $Id: md-abi.c 2615 2005-06-08 20:54:18Z twisti $
+#include "vm/jit/alpha/md-abi.h"
-*/
+#include "vm/descriptor.hpp"
+#include "vm/global.h"
+#include "vm/jit/abi.h"
-#include "vm/jit/alpha/types.h"
-#include "vm/jit/alpha/md-abi.h"
-#include "vm/descriptor.h"
-#include "vm/global.h"
+/* register descripton array **************************************************/
+
+s4 nregdescint[] = {
+ /* v0, t0, t1, t2, t3, t4, t5, t6, */
+ REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
+
+ /* t7, s0, s1, s2, s3, s4, s5, s6, */
+ REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
+
+ /* a0, a1, a2, a3, a4, a5, t8, t9, */
+ REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
+
+ /* t10, itmp1, ra, pv, at, itmp3, sp, zero, */
+ REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
+
+ REG_END
+};
+
+const char *abi_registers_integer_name[] = {
+ "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6",
+ "t7", "s0", "s1", "s2", "s3", "s4", "s5", "s6",
+ "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9",
+ "t10", "t11", "ra", "pv", "at", "gp", "sp", "zero"
+};
+
+const s4 abi_registers_integer_argument[] = {
+ 16, /* a0 */
+ 17, /* a1 */
+ 18, /* a2 */
+ 19, /* a3 */
+ 20, /* a4 */
+ 21, /* a5 */
+};
+
+const s4 abi_registers_integer_saved[] = {
+ 9, /* s0 */
+ 10, /* s1 */
+ 11, /* s2 */
+ 12, /* s3 */
+ 13, /* s4 */
+ 14, /* s5 */
+ 15, /* s6 */
+};
+
+const s4 abi_registers_integer_temporary[] = {
+ 1, /* t0 */
+ 2, /* t1 */
+ 3, /* t2 */
+ 4, /* t3 */
+ 5, /* t4 */
+ 6, /* t5 */
+ 7, /* t6 */
+ 8, /* t7 */
+ 22, /* t8 */
+ 23, /* t9 */
+ 24, /* t10 */
+};
+
+
+s4 nregdescfloat[] = {
+ REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
+ REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
+ REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
+ REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
+ REG_END
+};
+
+
+const s4 abi_registers_float_argument[] = {
+ 16, /* fa0 */
+ 17, /* fa1 */
+ 18, /* fa2 */
+ 19, /* fa3 */
+ 20, /* fa4 */
+ 21, /* fa5 */
+};
+
+const s4 abi_registers_float_saved[] = {
+ 2, /* fs0 */
+ 3, /* fs1 */
+ 4, /* fs2 */
+ 5, /* fs3 */
+ 6, /* fs4 */
+ 7, /* fs5 */
+ 8, /* fs6 */
+ 9, /* fs7 */
+};
+
+const s4 abi_registers_float_temporary[] = {
+ 1, /* ft0 */
+ 10, /* ft1 */
+ 11, /* ft2 */
+ 12, /* ft3 */
+ 13, /* ft4 */
+ 14, /* ft5 */
+ 15, /* ft6 */
+ 22, /* ft7 */
+ 23, /* ft8 */
+ 24, /* ft9 */
+ 25, /* ft10 */
+ 26, /* ft11 */
+ 27, /* ft12 */
+};
/* md_param_alloc **************************************************************
- XXX
+ Allocate the parameters of the given method descriptor according to the
+ calling convention of the platform.
*******************************************************************************/
/* set default values */
- reguse = 0;
+ reguse = 0;
stacksize = 0;
/* get params field of methoddesc */
case TYPE_LNG:
if (i < INT_ARG_CNT) {
pd->inmemory = false;
- pd->regoff = reguse;
+ pd->index = reguse;
+ pd->regoff = abi_registers_integer_argument[reguse];
reguse++;
- } else {
+ md->argintreguse = reguse;
+ }
+ else {
pd->inmemory = true;
- pd->regoff = stacksize;
+ pd->index = stacksize;
+ pd->regoff = stacksize * 8;
stacksize++;
}
break;
+
case TYPE_FLT:
case TYPE_DBL:
if (i < FLT_ARG_CNT) {
pd->inmemory = false;
- pd->regoff = reguse;
+ pd->index = reguse;
+ pd->regoff = abi_registers_float_argument[reguse];
reguse++;
- } else {
+ md->argfltreguse = reguse;
+ }
+ else {
pd->inmemory = true;
- pd->regoff = stacksize;
+ pd->index = stacksize;
+ pd->regoff = stacksize * 8;
stacksize++;
}
break;
/* fill register and stack usage */
- md->argintreguse = i;
- md->argfltreguse = i;
md->memuse = stacksize;
}
+/* md_param_alloc_native *******************************************************
+
+ Pre-allocate arguments according to the native ABI.
+
+*******************************************************************************/
+
+void md_param_alloc_native(methoddesc *md)
+{
+ /* On Alpha we use the same ABI for JIT method calls as for native
+ method calls. */
+
+ md_param_alloc(md);
+}
+
+
+/* md_return_alloc *************************************************************
+
+ Precolor the Java Stackelement containing the Return Value. Since
+ alpha has a dedicated return register (not an reused arg or
+ reserved reg), this is striaghtforward possible, as long, as this
+ stackelement does not have to survive a method invokation
+ (SAVEDVAR)
+
+ --- in
+ jd: jitdata of the current method
+ stackslot: Java Stackslot to contain the Return Value
+
+ --- out
+ if precoloring was possible:
+ VAR(stackslot->varnum)->flags = PREALLOC
+ ->vv.regoff = [REG_RESULT|REG_FRESULT]
+ rd->arg[flt|int]reguse set to a value according the register usage
+
+ NOTE: Do not pass a LOCALVAR in stackslot->varnum.
+*******************************************************************************/
+
+void md_return_alloc(jitdata *jd, stackelement_t *stackslot)
+{
+ methodinfo *m;
+ methoddesc *md;
+
+ /* get required compiler data */
+
+ m = jd->m;
+
+ md = m->parseddesc;
+
+ /* Only precolor the stackslot, if it is not a SAVEDVAR <-> has
+ not to survive method invokations. */
+
+ if (!(stackslot->flags & SAVEDVAR)) {
+
+ VAR(stackslot->varnum)->flags = PREALLOC;
+
+ if (IS_INT_LNG_TYPE(md->returntype.type))
+ VAR(stackslot->varnum)->vv.regoff = REG_RESULT;
+ else
+ VAR(stackslot->varnum)->vv.regoff = REG_FRESULT;
+ }
+}
+
+
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
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