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TCG: Mac OS X support for ppc64 target 

Darwin/ppc64 does not use function descriptors,
adapt prologue and tcg_out_call accordingly.
GPR2 is available for general use, so let's use it.

http://developer.apple.com/mac/library/documentation/DeveloperTools/Conceptual/LowLevelABI/110-64-bit_PowerPC_Function_Calling_Conventions/64bitPowerPC.html

v2:
- Don't mark reserved GPR13 as callee-save.
- Move tcg_out_b up.
- Fix unused variable warning in prologue.

Signed-off-by: Andreas Faerber <andreas.faerber@web.de>
Cc: malc <av1474@comtv.ru>
Signed-off-by: malc <av1474@comtv.ru>
master
Andreas Faerber 2009-12-06 14:00:24 +01:00 committed by malc
parent ee4660f925
commit 5d7ff5bbde
1 changed files with 41 additions and 14 deletions
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55
tcg/ppc64/tcg-target.c
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@ -104,6 +104,9 @@ static const int tcg_target_reg_alloc_order[] = {
TCG_REG_R29,
TCG_REG_R30,
TCG_REG_R31,
#ifdef __APPLE__
TCG_REG_R2,
#endif
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
@ -112,7 +115,9 @@ static const int tcg_target_reg_alloc_order[] = {
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
#ifndef __APPLE__
TCG_REG_R11,
#endif
TCG_REG_R12,
TCG_REG_R24,
TCG_REG_R25,
@ -136,6 +141,9 @@ static const int tcg_target_call_oarg_regs[2] = {
};
static const int tcg_target_callee_save_regs[] = {
#ifdef __APPLE__
TCG_REG_R11,
#endif
TCG_REG_R14,
TCG_REG_R15,
TCG_REG_R16,
@ -477,8 +485,31 @@ static void tcg_out_movi (TCGContext *s, TCGType type,
}
}
static void tcg_out_b (TCGContext *s, int mask, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) s->code_ptr;
if ((disp << 38) >> 38 == disp)
tcg_out32 (s, B | (disp & 0x3fffffc) | mask);
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, (tcg_target_long) target);
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS | mask);
}
}
static void tcg_out_call (TCGContext *s, tcg_target_long arg, int const_arg)
{
#ifdef __APPLE__
if (const_arg) {
tcg_out_b (s, LK, arg);
}
else {
tcg_out32 (s, MTSPR | RS (arg) | LR);
tcg_out32 (s, BCLR | BO_ALWAYS | LK);
}
#else
int reg;
if (const_arg) {
@ -492,6 +523,7 @@ static void tcg_out_call (TCGContext *s, tcg_target_long arg, int const_arg)
tcg_out32 (s, LD | RT (11) | RA (reg) | 16);
tcg_out32 (s, LD | RT (2) | RA (reg) | 8);
tcg_out32 (s, BCCTR | BO_ALWAYS | LK);
#endif
}
static void tcg_out_ldst (TCGContext *s, int ret, int addr,
@ -516,20 +548,6 @@ static void tcg_out_ldsta (TCGContext *s, int ret, int addr,
}
}
static void tcg_out_b (TCGContext *s, int mask, tcg_target_long target)
{
tcg_target_long disp;
disp = target - (tcg_target_long) s->code_ptr;
if ((disp << 38) >> 38 == disp)
tcg_out32 (s, B | (disp & 0x3fffffc) | mask);
else {
tcg_out_movi (s, TCG_TYPE_I64, 0, (tcg_target_long) target);
tcg_out32 (s, MTSPR | RS (0) | CTR);
tcg_out32 (s, BCCTR | BO_ALWAYS | mask);
}
}
#if defined (CONFIG_SOFTMMU)
#include "../../softmmu_defs.h"
@ -845,7 +863,9 @@ static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
void tcg_target_qemu_prologue (TCGContext *s)
{
int i, frame_size;
#ifndef __APPLE__
uint64_t addr;
#endif
frame_size = 0
+ 8 /* back chain */
@ -859,10 +879,12 @@ void tcg_target_qemu_prologue (TCGContext *s)
;
frame_size = (frame_size + 15) & ~15;
#ifndef __APPLE__
/* First emit adhoc function descriptor */
addr = (uint64_t) s->code_ptr + 24;
tcg_out32 (s, addr >> 32); tcg_out32 (s, addr); /* entry point */
s->code_ptr += 16; /* skip TOC and environment pointer */
#endif
/* Prologue */
tcg_out32 (s, MFSPR | RT (0) | LR);
@ -1516,6 +1538,9 @@ void tcg_target_init (TCGContext *s)
tcg_regset_set32 (tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);
tcg_regset_set32 (tcg_target_call_clobber_regs, 0,
(1 << TCG_REG_R0) |
#ifdef __APPLE__
(1 << TCG_REG_R2) |
#endif
(1 << TCG_REG_R3) |
(1 << TCG_REG_R4) |
(1 << TCG_REG_R5) |
@ -1531,7 +1556,9 @@ void tcg_target_init (TCGContext *s)
tcg_regset_clear (s->reserved_regs);
tcg_regset_set_reg (s->reserved_regs, TCG_REG_R0);
tcg_regset_set_reg (s->reserved_regs, TCG_REG_R1);
#ifndef __APPLE__
tcg_regset_set_reg (s->reserved_regs, TCG_REG_R2);
#endif
tcg_regset_set_reg (s->reserved_regs, TCG_REG_R13);
#ifdef CONFIG_USE_GUEST_BASE