diff options
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/translate.c | 74 |
1 files changed, 45 insertions, 29 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index b023120626..286eb7db16 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -2619,56 +2619,72 @@ fail: static void gen_bshfl (DisasContext *ctx, uint32_t op2, int rt, int rd) { - TCGv t0 = tcg_temp_new(); - TCGv t1 = tcg_temp_new(); + TCGv t0; - gen_load_gpr(t1, rt); + if (rd == 0) { + /* If no destination, treat it as a NOP. */ + MIPS_DEBUG("NOP"); + return; + } + + t0 = tcg_temp_new(); + gen_load_gpr(t0, rt); switch (op2) { case OPC_WSBH: - tcg_gen_shri_tl(t0, t1, 8); - tcg_gen_andi_tl(t0, t0, 0x00FF00FF); - tcg_gen_shli_tl(t1, t1, 8); - tcg_gen_andi_tl(t1, t1, ~0x00FF00FF); - tcg_gen_or_tl(t0, t0, t1); - tcg_gen_ext32s_tl(t0, t0); + { + TCGv t1 = tcg_temp_new(); + + tcg_gen_shri_tl(t1, t0, 8); + tcg_gen_andi_tl(t1, t1, 0x00FF00FF); + tcg_gen_shli_tl(t0, t0, 8); + tcg_gen_andi_tl(t0, t0, ~0x00FF00FF); + tcg_gen_or_tl(t0, t0, t1); + tcg_temp_free(t1); + tcg_gen_ext32s_tl(cpu_gpr[rd], t0); + } break; case OPC_SEB: - tcg_gen_ext8s_tl(t0, t1); + tcg_gen_ext8s_tl(cpu_gpr[rd], t0); break; case OPC_SEH: - tcg_gen_ext16s_tl(t0, t1); + tcg_gen_ext16s_tl(cpu_gpr[rd], t0); break; #if defined(TARGET_MIPS64) case OPC_DSBH: - gen_load_gpr(t1, rt); - tcg_gen_shri_tl(t0, t1, 8); - tcg_gen_andi_tl(t0, t0, 0x00FF00FF00FF00FFULL); - tcg_gen_shli_tl(t1, t1, 8); - tcg_gen_andi_tl(t1, t1, ~0x00FF00FF00FF00FFULL); - tcg_gen_or_tl(t0, t0, t1); + { + TCGv t1 = tcg_temp_new(); + + tcg_gen_shri_tl(t1, t0, 8); + tcg_gen_andi_tl(t1, t1, 0x00FF00FF00FF00FFULL); + tcg_gen_shli_tl(t0, t0, 8); + tcg_gen_andi_tl(t0, t0, ~0x00FF00FF00FF00FFULL); + tcg_gen_or_tl(cpu_gpr[rd], t0, t1); + tcg_temp_free(t1); + } break; case OPC_DSHD: - gen_load_gpr(t1, rt); - tcg_gen_shri_tl(t0, t1, 16); - tcg_gen_andi_tl(t0, t0, 0x0000FFFF0000FFFFULL); - tcg_gen_shli_tl(t1, t1, 16); - tcg_gen_andi_tl(t1, t1, ~0x0000FFFF0000FFFFULL); - tcg_gen_or_tl(t1, t0, t1); - tcg_gen_shri_tl(t0, t1, 32); - tcg_gen_shli_tl(t1, t1, 32); - tcg_gen_or_tl(t0, t0, t1); + { + TCGv t1 = tcg_temp_new(); + + tcg_gen_shri_tl(t1, t0, 16); + tcg_gen_andi_tl(t1, t1, 0x0000FFFF0000FFFFULL); + tcg_gen_shli_tl(t0, t0, 16); + tcg_gen_andi_tl(t0, t0, ~0x0000FFFF0000FFFFULL); + tcg_gen_or_tl(t0, t0, t1); + tcg_gen_shri_tl(t1, t0, 32); + tcg_gen_shli_tl(t0, t0, 32); + tcg_gen_or_tl(cpu_gpr[rd], t0, t1); + tcg_temp_free(t1); + } break; #endif default: MIPS_INVAL("bsfhl"); generate_exception(ctx, EXCP_RI); tcg_temp_free(t0); - tcg_temp_free(t1); return; } - gen_store_gpr(t0, rd); tcg_temp_free(t0); - tcg_temp_free(t1); } #ifndef CONFIG_USER_ONLY |