falso
/
qemu-irix
mirror of https://github.com/n64decomp/qemu-irix.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

tcp/mips: Change TCG_AREG0 (fp -> s0) 

Register fp (frame pointer) is a bad choice for compilations
without optimisation, because the compiler makes heavy use
of this register (so the resulting code crashes).

Register s0 had been used for TCG_AREG1 in earlier releases,
but was no longer used and is now free for TCG_AREG0.

The resulting code works for compilations without
optimisation (tested with qemu mips in qemu mips
on x86 host).

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Stefan Weil 2010-04-09 17:28:40 +02:00 committed by Aurelien Jarno
parent 1ce4fad939
commit d80e20a1c3
3 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
dyngen-exec.h
View File

@ -69,9 +69,9 @@ extern int printf(const char *, ...);
#define AREG1 "r14"
#define AREG2 "r15"
#elif defined(__mips__)
#define AREG0 "fp"
#define AREG1 "s0"
#define AREG2 "s1"
#define AREG0 "s0"
#define AREG1 "s1"
#define AREG2 "fp"
#elif defined(__sparc__)
#ifdef CONFIG_SOLARIS
#define AREG0 "g2"

5
tcg/mips/tcg-target.c
View File

@ -1273,7 +1273,9 @@ static const TCGTargetOpDef mips_op_defs[] = {
};
static int tcg_target_callee_save_regs[] = {
#if 0 /* used for the global env (TCG_AREG0), so no need to save */
TCG_REG_S0,
#endif
TCG_REG_S1,
TCG_REG_S2,
TCG_REG_S3,
@ -1282,8 +1284,7 @@ static int tcg_target_callee_save_regs[] = {
TCG_REG_S6,
TCG_REG_S7,
TCG_REG_GP,
/* TCG_REG_FP, */ /* currently used for the global env, so np
need to save */
TCG_REG_FP,
TCG_REG_RA, /* should be last for ABI compliance */
};

6
tcg/mips/tcg-target.h
View File

@ -92,9 +92,9 @@ enum {
#undef TCG_TARGET_HAS_ext16u_i32 /* andi rt, rs, 0xffff */
/* Note: must be synced with dyngen-exec.h */
#define TCG_AREG0 TCG_REG_FP
#define TCG_AREG1 TCG_REG_S0
#define TCG_AREG2 TCG_REG_S1
#define TCG_AREG0 TCG_REG_S0
#define TCG_AREG1 TCG_REG_S1
#define TCG_AREG2 TCG_REG_FP
#include <sys/cachectl.h>