diff options
Diffstat (limited to 'target-alpha/translate.c')
| -rw-r--r-- | target-alpha/translate.c | 111 |
1 files changed, 50 insertions, 61 deletions
diff --git a/target-alpha/translate.c b/target-alpha/translate.c index c606183c69..5e52674497 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -1235,75 +1235,64 @@ static void gen_ext_l(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit, } /* INSWH, INSLH, INSQH */ -static void gen_ins_h(int ra, int rb, int rc, int islit, +static void gen_ins_h(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit, uint8_t lit, uint8_t byte_mask) { - if (unlikely(rc == 31)) { - return; - } else if (unlikely(ra == 31) || (islit && (lit & 7) == 0)) { - tcg_gen_movi_i64(cpu_ir[rc], 0); - } else { - TCGv tmp = tcg_temp_new(); + TCGv tmp = tcg_temp_new(); - /* The instruction description has us left-shift the byte mask - and extract bits <15:8> and apply that zap at the end. This - is equivalent to simply performing the zap first and shifting - afterward. */ - gen_zapnoti (tmp, cpu_ir[ra], byte_mask); + /* The instruction description has us left-shift the byte mask and extract + bits <15:8> and apply that zap at the end. This is equivalent to simply + performing the zap first and shifting afterward. */ + gen_zapnoti(tmp, va, byte_mask); - if (islit) { - /* Note that we have handled the lit==0 case above. */ - tcg_gen_shri_i64 (cpu_ir[rc], tmp, 64 - (lit & 7) * 8); + if (islit) { + lit &= 7; + if (unlikely(lit == 0)) { + tcg_gen_movi_i64(vc, 0); } else { - TCGv shift = tcg_temp_new(); - - /* If (B & 7) == 0, we need to shift by 64 and leave a zero. - Do this portably by splitting the shift into two parts: - shift_count-1 and 1. Arrange for the -1 by using - ones-complement instead of twos-complement in the negation: - ~((B & 7) * 8) & 63. */ - - tcg_gen_andi_i64(shift, cpu_ir[rb], 7); - tcg_gen_shli_i64(shift, shift, 3); - tcg_gen_not_i64(shift, shift); - tcg_gen_andi_i64(shift, shift, 0x3f); - - tcg_gen_shr_i64(cpu_ir[rc], tmp, shift); - tcg_gen_shri_i64(cpu_ir[rc], cpu_ir[rc], 1); - tcg_temp_free(shift); + tcg_gen_shri_i64(vc, tmp, 64 - lit * 8); } - tcg_temp_free(tmp); + } else { + TCGv shift = tcg_temp_new(); + + /* If (B & 7) == 0, we need to shift by 64 and leave a zero. Do this + portably by splitting the shift into two parts: shift_count-1 and 1. + Arrange for the -1 by using ones-complement instead of + twos-complement in the negation: ~(B * 8) & 63. */ + + tcg_gen_shli_i64(shift, load_gpr(ctx, rb), 3); + tcg_gen_not_i64(shift, shift); + tcg_gen_andi_i64(shift, shift, 0x3f); + + tcg_gen_shr_i64(vc, tmp, shift); + tcg_gen_shri_i64(vc, vc, 1); + tcg_temp_free(shift); } + tcg_temp_free(tmp); } /* INSBL, INSWL, INSLL, INSQL */ -static void gen_ins_l(int ra, int rb, int rc, int islit, +static void gen_ins_l(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit, uint8_t lit, uint8_t byte_mask) { - if (unlikely(rc == 31)) { - return; - } else if (unlikely(ra == 31)) { - tcg_gen_movi_i64(cpu_ir[rc], 0); - } else { - TCGv tmp = tcg_temp_new(); + TCGv tmp = tcg_temp_new(); - /* The instruction description has us left-shift the byte mask - the same number of byte slots as the data and apply the zap - at the end. This is equivalent to simply performing the zap - first and shifting afterward. */ - gen_zapnoti (tmp, cpu_ir[ra], byte_mask); + /* The instruction description has us left-shift the byte mask + the same number of byte slots as the data and apply the zap + at the end. This is equivalent to simply performing the zap + first and shifting afterward. */ + gen_zapnoti(tmp, va, byte_mask); - if (islit) { - tcg_gen_shli_i64(cpu_ir[rc], tmp, (lit & 7) * 8); - } else { - TCGv shift = tcg_temp_new(); - tcg_gen_andi_i64(shift, cpu_ir[rb], 7); - tcg_gen_shli_i64(shift, shift, 3); - tcg_gen_shl_i64(cpu_ir[rc], tmp, shift); - tcg_temp_free(shift); - } - tcg_temp_free(tmp); + if (islit) { + tcg_gen_shli_i64(vc, tmp, (lit & 7) * 8); + } else { + TCGv shift = tcg_temp_new(); + tcg_gen_andi_i64(shift, load_gpr(ctx, rb), 7); + tcg_gen_shli_i64(shift, shift, 3); + tcg_gen_shl_i64(vc, tmp, shift); + tcg_temp_free(shift); } + tcg_temp_free(tmp); } /* MSKWH, MSKLH, MSKQH */ @@ -2094,7 +2083,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x0B: /* INSBL */ - gen_ins_l(ra, rb, rc, islit, lit, 0x01); + gen_ins_l(ctx, vc, va, rb, islit, lit, 0x01); break; case 0x12: /* MSKWL */ @@ -2106,7 +2095,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x1B: /* INSWL */ - gen_ins_l(ra, rb, rc, islit, lit, 0x03); + gen_ins_l(ctx, vc, va, rb, islit, lit, 0x03); break; case 0x22: /* MSKLL */ @@ -2118,7 +2107,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x2B: /* INSLL */ - gen_ins_l(ra, rb, rc, islit, lit, 0x0f); + gen_ins_l(ctx, vc, va, rb, islit, lit, 0x0f); break; case 0x30: /* ZAP */ @@ -2162,7 +2151,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x3B: /* INSQL */ - gen_ins_l(ra, rb, rc, islit, lit, 0xff); + gen_ins_l(ctx, vc, va, rb, islit, lit, 0xff); break; case 0x3C: /* SRA */ @@ -2182,7 +2171,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x57: /* INSWH */ - gen_ins_h(ra, rb, rc, islit, lit, 0x03); + gen_ins_h(ctx, vc, va, rb, islit, lit, 0x03); break; case 0x5A: /* EXTWH */ @@ -2194,7 +2183,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x67: /* INSLH */ - gen_ins_h(ra, rb, rc, islit, lit, 0x0f); + gen_ins_h(ctx, vc, va, rb, islit, lit, 0x0f); break; case 0x6A: /* EXTLH */ @@ -2206,7 +2195,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x77: /* INSQH */ - gen_ins_h(ra, rb, rc, islit, lit, 0xff); + gen_ins_h(ctx, vc, va, rb, islit, lit, 0xff); break; case 0x7A: /* EXTQH */ |