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target-ppc: Compute addition carry with setcond 

Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Richard Henderson 2013-02-19 23:52:16 -08:00 committed by Blue Swirl
parent ffe30937c8
commit 146de60dca
1 changed files with 17 additions and 27 deletions
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40
target-ppc/translate.c
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@ -768,36 +768,26 @@ static inline void gen_op_arith_compute_ov(DisasContext *ctx, TCGv arg0,
static inline void gen_op_arith_compute_ca(DisasContext *ctx, TCGv arg1,
TCGv arg2, int sub)
{
int l1 = gen_new_label();
TCGv t0 = tcg_temp_new(), t1 = arg1, t2 = arg2;
#if defined(TARGET_PPC64)
if (!(ctx->sf_mode)) {
TCGv t0, t1;
t0 = tcg_temp_new();
t1 = tcg_temp_new();
tcg_gen_ext32u_tl(t0, arg1);
tcg_gen_ext32u_tl(t1, arg2);
if (sub) {
tcg_gen_brcond_tl(TCG_COND_GTU, t0, t1, l1);
} else {
tcg_gen_brcond_tl(TCG_COND_GEU, t0, t1, l1);
t1 = t0;
tcg_gen_ext32u_tl(t1, arg1);
t2 = tcg_temp_new();
tcg_gen_ext32u_tl(t2, arg2);
}
tcg_gen_movi_tl(cpu_ca, 1);
gen_set_label(l1);
tcg_temp_free(t0);
tcg_temp_free(t1);
} else
#endif
{
if (sub) {
tcg_gen_brcond_tl(TCG_COND_GTU, arg1, arg2, l1);
} else {
tcg_gen_brcond_tl(TCG_COND_GEU, arg1, arg2, l1);
}
tcg_gen_movi_tl(cpu_ca, 1);
gen_set_label(l1);
tcg_gen_setcond_tl(sub ? TCG_COND_LEU : TCG_COND_LTU, t0, t1, t2);
tcg_gen_or_tl(cpu_ca, cpu_ca, t0);
tcg_temp_free(t0);
#if defined(TARGET_PPC64)
if (!(ctx->sf_mode)) {
tcg_temp_free(t2);
}
#endif
}
/* Common add function */
@ -811,7 +801,7 @@ static inline void gen_op_arith_add(DisasContext *ctx, TCGv ret, TCGv arg1,
(!TCGV_EQUAL(ret,arg1) && !TCGV_EQUAL(ret, arg2))) {
t0 = ret;
} else {
t0 = tcg_temp_local_new();
t0 = tcg_temp_new();
}
if (add_ca) {