gwj / at91sam9263 · Commits

Commit 98070ce00f1561bb244c366b2cb76c4b4f7c2de1

Authored by Nathan Froyd
Committed by Aurelien Jarno
1 parent 7d69c52e

target-mips: fix MADD and MSUB/MSUBU instructions 

MADD was not correctly writing to HI.

MSUB/MSUBU are specified as `HI||LO - product', not `product - HI||LO'.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Inline Side-by-side
Showing 1 changed file with 3 additions and 3 deletions
target-mips/translate.c
  View file @98070ce
... ... @@ -2132,7 +2132,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
2132 2132 tcg_gen_trunc_i64_tl(t1, t2);
2133 2133 tcg_temp_free_i64(t2);
2134 2134 tcg_gen_ext32s_tl(cpu_LO[0], t0);
2135   - tcg_gen_ext32s_tl(cpu_LO[1], t1);
  2135 + tcg_gen_ext32s_tl(cpu_HI[0], t1);
2136 2136 }
2137 2137 opn = "madd";
2138 2138 break;
... ... @@ -2167,7 +2167,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
2167 2167 tcg_gen_ext_tl_i64(t3, t1);
2168 2168 tcg_gen_mul_i64(t2, t2, t3);
2169 2169 tcg_gen_concat_tl_i64(t3, cpu_LO[0], cpu_HI[0]);
2170   - tcg_gen_sub_i64(t2, t2, t3);
  2170 + tcg_gen_sub_i64(t2, t3, t2);
2171 2171 tcg_temp_free_i64(t3);
2172 2172 tcg_gen_trunc_i64_tl(t0, t2);
2173 2173 tcg_gen_shri_i64(t2, t2, 32);
... ... @@ -2189,7 +2189,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
2189 2189 tcg_gen_extu_tl_i64(t3, t1);
2190 2190 tcg_gen_mul_i64(t2, t2, t3);
2191 2191 tcg_gen_concat_tl_i64(t3, cpu_LO[0], cpu_HI[0]);
2192   - tcg_gen_sub_i64(t2, t2, t3);
  2192 + tcg_gen_sub_i64(t2, t3, t2);
2193 2193 tcg_temp_free_i64(t3);
2194 2194 tcg_gen_trunc_i64_tl(t0, t2);
2195 2195 tcg_gen_shri_i64(t2, t2, 32);
... ...