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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>
This commit is contained in:
Nathan Froyd 2009-07-01 10:52:22 -07:00 committed by Aurelien Jarno
parent 7d69c52ed8
commit 98070ce00f
1 changed files with 3 additions and 3 deletions
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6
target-mips/translate.c
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@ -2132,7 +2132,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_trunc_i64_tl(t1, t2);
tcg_temp_free_i64(t2);
tcg_gen_ext32s_tl(cpu_LO[0], t0);
tcg_gen_ext32s_tl(cpu_LO[1], t1);
tcg_gen_ext32s_tl(cpu_HI[0], t1);
}
opn = "madd";
break;
@ -2167,7 +2167,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_ext_tl_i64(t3, t1);
tcg_gen_mul_i64(t2, t2, t3);
tcg_gen_concat_tl_i64(t3, cpu_LO[0], cpu_HI[0]);
tcg_gen_sub_i64(t2, t2, t3);
tcg_gen_sub_i64(t2, t3, t2);
tcg_temp_free_i64(t3);
tcg_gen_trunc_i64_tl(t0, t2);
tcg_gen_shri_i64(t2, t2, 32);
@ -2189,7 +2189,7 @@ static void gen_muldiv (DisasContext *ctx, uint32_t opc,
tcg_gen_extu_tl_i64(t3, t1);
tcg_gen_mul_i64(t2, t2, t3);
tcg_gen_concat_tl_i64(t3, cpu_LO[0], cpu_HI[0]);
tcg_gen_sub_i64(t2, t2, t3);
tcg_gen_sub_i64(t2, t3, t2);
tcg_temp_free_i64(t3);
tcg_gen_trunc_i64_tl(t0, t2);
tcg_gen_shri_i64(t2, t2, 32);