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authorRichard Henderson <rth@twiddle.net>2016-02-23 17:18:34 -0800
committerDavid Gibson <david@gibson.dropbear.id.au>2016-05-27 09:40:22 +1000
commit24f9cd951d1a8eda1ce1e2cf97a26ca169040331 (patch)
tree4047a892198636104b3bffc1fc592c000b324047 /target-ppc
parent319de6fe6ea4b68288267bacc4574a605341f8fe (diff)
target-ppc: Use movcond in isel
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target-ppc')
-rw-r--r--target-ppc/translate.c29
1 files changed, 11 insertions, 18 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 745f4de98f..3ea6625d26 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -756,27 +756,20 @@ static void gen_cmpli(DisasContext *ctx)
/* isel (PowerPC 2.03 specification) */
static void gen_isel(DisasContext *ctx)
{
- TCGLabel *l1, *l2;
uint32_t bi = rC(ctx->opcode);
- uint32_t mask;
- TCGv_i32 t0;
+ uint32_t mask = 0x08 >> (bi & 0x03);
+ TCGv t0 = tcg_temp_new();
+ TCGv zr;
- l1 = gen_new_label();
- l2 = gen_new_label();
+ tcg_gen_extu_i32_tl(t0, cpu_crf[bi >> 2]);
+ tcg_gen_andi_tl(t0, t0, mask);
- mask = 0x08 >> (bi & 0x03);
- t0 = tcg_temp_new_i32();
- tcg_gen_andi_i32(t0, cpu_crf[bi >> 2], mask);
- tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
- if (rA(ctx->opcode) == 0)
- tcg_gen_movi_tl(cpu_gpr[rD(ctx->opcode)], 0);
- else
- tcg_gen_mov_tl(cpu_gpr[rD(ctx->opcode)], cpu_gpr[rA(ctx->opcode)]);
- tcg_gen_br(l2);
- gen_set_label(l1);
- tcg_gen_mov_tl(cpu_gpr[rD(ctx->opcode)], cpu_gpr[rB(ctx->opcode)]);
- gen_set_label(l2);
- tcg_temp_free_i32(t0);
+ zr = tcg_const_tl(0);
+ tcg_gen_movcond_tl(TCG_COND_NE, cpu_gpr[rD(ctx->opcode)], t0, zr,
+ rA(ctx->opcode) ? cpu_gpr[rA(ctx->opcode)] : zr,
+ cpu_gpr[rB(ctx->opcode)]);
+ tcg_temp_free(zr);
+ tcg_temp_free(t0);
}
/* cmpb: PowerPC 2.05 specification */