diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-02-19 23:52:05 -0800 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2013-02-23 17:25:29 +0000 |
| commit | 831d7fe800774db0d7142fdf2a8f8758c8bf9c92 (patch) | |
| tree | 7eefe470335a31d5eddb5cfbfa1ac89183d2c242 /target-arm | |
| parent | dc46d1c68aa107b8e3c95f66e87cd9d02e6452a9 (diff) | |
| download | qemu-831d7fe800774db0d7142fdf2a8f8758c8bf9c92.tar.gz | |
target-arm: Use mul[us]2 in gen_mul[us]_i64_i32
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-arm')
| -rw-r--r-- | target-arm/translate.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index a8893f767f..129f6744cb 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -305,35 +305,41 @@ static TCGv_i64 gen_subq_msw(TCGv_i64 a, TCGv b) return a; } -/* FIXME: Most targets have native widening multiplication. - It would be good to use that instead of a full wide multiply. */ /* 32x32->64 multiply. Marks inputs as dead. */ static TCGv_i64 gen_mulu_i64_i32(TCGv a, TCGv b) { - TCGv_i64 tmp1 = tcg_temp_new_i64(); - TCGv_i64 tmp2 = tcg_temp_new_i64(); + TCGv lo = tcg_temp_new_i32(); + TCGv hi = tcg_temp_new_i32(); + TCGv_i64 ret; - tcg_gen_extu_i32_i64(tmp1, a); + tcg_gen_mulu2_i32(lo, hi, a, b); tcg_temp_free_i32(a); - tcg_gen_extu_i32_i64(tmp2, b); tcg_temp_free_i32(b); - tcg_gen_mul_i64(tmp1, tmp1, tmp2); - tcg_temp_free_i64(tmp2); - return tmp1; + + ret = tcg_temp_new_i64(); + tcg_gen_concat_i32_i64(ret, lo, hi); + tcg_temp_free(lo); + tcg_temp_free(hi); + + return ret; } static TCGv_i64 gen_muls_i64_i32(TCGv a, TCGv b) { - TCGv_i64 tmp1 = tcg_temp_new_i64(); - TCGv_i64 tmp2 = tcg_temp_new_i64(); + TCGv lo = tcg_temp_new_i32(); + TCGv hi = tcg_temp_new_i32(); + TCGv_i64 ret; - tcg_gen_ext_i32_i64(tmp1, a); + tcg_gen_muls2_i32(lo, hi, a, b); tcg_temp_free_i32(a); - tcg_gen_ext_i32_i64(tmp2, b); tcg_temp_free_i32(b); - tcg_gen_mul_i64(tmp1, tmp1, tmp2); - tcg_temp_free_i64(tmp2); - return tmp1; + + ret = tcg_temp_new_i64(); + tcg_gen_concat_i32_i64(ret, lo, hi); + tcg_temp_free(lo); + tcg_temp_free(hi); + + return ret; } /* Swap low and high halfwords. */ |