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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>
This commit is contained in:
Richard Henderson 2013-02-19 23:52:05 -08:00 committed by Blue Swirl
parent dc46d1c68a
commit 831d7fe800
1 changed files with 22 additions and 16 deletions
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38
target-arm/translate.c
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@ -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. */