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target-mips: don't use local temps for store conditional 

Store conditional operations only need local temps in user mode. Fix
the code to use temp local only in user mode, this spares two memory
stores in system mode.

At the same time remove a wrong a wrong copied & pasted comment,
store operations don't have a register destination.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2012-10-09 21:53:21 +02:00
parent fc40787abc
commit 2d2826b99e
1 changed files with 6 additions and 5 deletions
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11
target-mips/translate.c
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@ -1814,13 +1814,14 @@ static void gen_st_cond (DisasContext *ctx, uint32_t opc, int rt,
const char *opn = "st_cond";
TCGv t0, t1;
#ifdef CONFIG_USER_ONLY
t0 = tcg_temp_local_new();
gen_base_offset_addr(ctx, t0, base, offset);
/* Don't do NOP if destination is zero: we must perform the actual
memory access. */
t1 = tcg_temp_local_new();
#else
t0 = tcg_temp_new();
t1 = tcg_temp_new();
#endif
gen_base_offset_addr(ctx, t0, base, offset);
gen_load_gpr(t1, rt);
switch (opc) {
#if defined(TARGET_MIPS64)