diff options
Diffstat (limited to 'target/sh4/translate.c')
| -rw-r--r-- | target/sh4/translate.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/target/sh4/translate.c b/target/sh4/translate.c index ebb6c901bf..e599ab9d1a 100644 --- a/target/sh4/translate.c +++ b/target/sh4/translate.c @@ -705,16 +705,20 @@ static void _decode_opc(DisasContext * ctx) return; case 0x300f: /* addv Rm,Rn */ { - TCGv t0, t1, t2; - t0 = tcg_temp_new(); - tcg_gen_add_i32(t0, REG(B7_4), REG(B11_8)); + TCGv Rn = REG(B11_8); + TCGv Rm = REG(B7_4); + TCGv result, t1, t2; + + result = tcg_temp_new(); t1 = tcg_temp_new(); - tcg_gen_xor_i32(t1, t0, REG(B11_8)); t2 = tcg_temp_new(); - tcg_gen_xor_i32(t2, REG(B7_4), REG(B11_8)); + tcg_gen_add_i32(result, Rm, Rn); + /* T = ((Rn ^ Rm) & (Result ^ Rn)) >> 31 */ + tcg_gen_xor_i32(t1, result, Rn); + tcg_gen_xor_i32(t2, Rm, Rn); tcg_gen_andc_i32(cpu_sr_t, t1, t2); tcg_gen_shri_i32(cpu_sr_t, cpu_sr_t, 31); - tcg_gen_mov_i32(REG(B7_4), t0); + tcg_gen_mov_i32(Rn, result); } return; case 0x2009: /* and Rm,Rn */ @@ -929,16 +933,20 @@ static void _decode_opc(DisasContext * ctx) return; case 0x300b: /* subv Rm,Rn */ { - TCGv t0, t1, t2; - t0 = tcg_temp_new(); - tcg_gen_sub_i32(t0, REG(B11_8), REG(B7_4)); + TCGv Rn = REG(B11_8); + TCGv Rm = REG(B7_4); + TCGv result, t1, t2; + + result = tcg_temp_new(); t1 = tcg_temp_new(); - tcg_gen_xor_i32(t1, t0, REG(B7_4)); t2 = tcg_temp_new(); - tcg_gen_xor_i32(t2, REG(B11_8), REG(B7_4)); + tcg_gen_sub_i32(result, Rn, Rm); + /* T = ((Rn ^ Rm) & (Result ^ Rn)) >> 31 */ + tcg_gen_xor_i32(t1, result, Rn); + tcg_gen_xor_i32(t2, Rn, Rm); tcg_gen_and_i32(t1, t1, t2); tcg_gen_shri_i32(cpu_sr_t, t1, 31); - tcg_gen_mov_i32(REG(B11_8), t0); + tcg_gen_mov_i32(Rn, result); } return; case 0x2008: /* tst Rm,Rn */ |