diff options
| author | Richard Henderson <rth@twiddle.net> | 2016-02-23 17:18:34 -0800 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-05-27 09:40:22 +1000 |
| commit | 24f9cd951d1a8eda1ce1e2cf97a26ca169040331 (patch) | |
| tree | 4047a892198636104b3bffc1fc592c000b324047 /target-ppc | |
| parent | 319de6fe6ea4b68288267bacc4574a605341f8fe (diff) | |
| download | qemu-24f9cd951d1a8eda1ce1e2cf97a26ca169040331.zip | |
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.c | 29 |
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 */ |