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i386.c (x86_initialize_trampoline): New global function.

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* i386.c (x86_initialize_trampoline): New global function.
	* i386.h (TRAMPOLINE_SIZE): Size is 23 for x86_64.
	(INITIALIZE_TRAMPOLINE): Move offline.
	* i386-protos.h (x86_initialize_trampoline): Declare.

From-SVN: r41123
This commit is contained in:
Jan Hubicka 2001-04-05 19:18:42 +02:00 committed by Jan Hubicka
parent ac62a60e1f
commit 0ed0862080
2 changed files with 67 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
Thu Apr 5 19:13:33 CEST 2001 Jan Hubicka <jh@suse.cz>
* i386.c (x86_initialize_trampoline): New global function.
* i386.h (TRAMPOLINE_SIZE): Size is 23 for x86_64.
(INITIALIZE_TRAMPOLINE): Move offline.
* i386-protos.h (x86_initialize_trampoline): Declare.
Thu Apr 5 19:02:15 CEST 2001 Jan Hubicka <jh@suse.cz>
* i386.md (movdi_1_rex64): Allow SSE->SSE reg move.

60
gcc/config/i386/i386.c
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@ -8936,6 +8936,66 @@ ix86_local_alignment (type, align)
}
return align;
}
/* Emit RTL insns to initialize the variable parts of a trampoline.
FNADDR is an RTX for the address of the function's pure code.
CXT is an RTX for the static chain value for the function. */
void
x86_initialize_trampoline (tramp, fnaddr, cxt)
rtx tramp, fnaddr, cxt;
{
if (!TARGET_64BIT)
{
/* Compute offset from the end of the jmp to the target function. */
rtx disp = expand_binop (SImode, sub_optab, fnaddr,
plus_constant (tramp, 10),
NULL_RTX, 1, OPTAB_DIRECT);
emit_move_insn (gen_rtx_MEM (QImode, tramp),
GEN_INT (trunc_int_for_mode (0xb9, QImode)));
emit_move_insn (gen_rtx_MEM (SImode, plus_constant (tramp, 1)), cxt);
emit_move_insn (gen_rtx_MEM (QImode, plus_constant (tramp, 5)),
GEN_INT (trunc_int_for_mode (0xe9, QImode)));
emit_move_insn (gen_rtx_MEM (SImode, plus_constant (tramp, 6)), disp);
}
else
{
int offset = 0;
/* Try to load address using shorter movl instead of movabs.
We may want to support movq for kernel mode, but kernel does not use
trampolines at the moment. */
if (x86_64_zero_extended_value (fnaddr))
{
fnaddr = copy_to_mode_reg (DImode, fnaddr);
emit_move_insn (gen_rtx_MEM (HImode, plus_constant (tramp, offset)),
GEN_INT (trunc_int_for_mode (0xbb41, HImode)));
emit_move_insn (gen_rtx_MEM (SImode, plus_constant (tramp, offset + 2)),
gen_lowpart (SImode, fnaddr));
offset += 6;
}
else
{
emit_move_insn (gen_rtx_MEM (HImode, plus_constant (tramp, offset)),
GEN_INT (trunc_int_for_mode (0xbb49, HImode)));
emit_move_insn (gen_rtx_MEM (DImode, plus_constant (tramp, offset + 2)),
fnaddr);
offset += 10;
}
/* Load static chain using movabs to r10. */
emit_move_insn (gen_rtx_MEM (HImode, plus_constant (tramp, offset)),
GEN_INT (trunc_int_for_mode (0xba49, HImode)));
emit_move_insn (gen_rtx_MEM (DImode, plus_constant (tramp, offset + 2)),
cxt);
offset += 10;
/* Jump to the r11 */
emit_move_insn (gen_rtx_MEM (HImode, plus_constant (tramp, offset)),
GEN_INT (trunc_int_for_mode (0xff49, HImode)));
emit_move_insn (gen_rtx_MEM (QImode, plus_constant (tramp, offset+2)),
GEN_INT (trunc_int_for_mode (0xe3, HImode)));
offset += 3;
if (offset > TRAMPOLINE_SIZE)
abort();
}
}
#define def_builtin(NAME, TYPE, CODE) \
builtin_function ((NAME), (TYPE), (CODE), BUILT_IN_MD, NULL_PTR)