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target/hexagon: Use mulu64 for int128_mul_6464

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No need to open-code 64x64->128-bit multiplication.

Reviewed-by: Brian Cain <brian.cain@oss.qualcomm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-08 16:11:42 -06:00
parent 8429306c32
commit 65b4dce393
1 changed files with 3 additions and 29 deletions
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32
target/hexagon/fma_emu.c
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@ -82,38 +82,12 @@ int32_t float32_getexp(float32 f32)
return -1;
}
static uint32_t int128_getw0(Int128 x)
{
return int128_getlo(x);
}
static uint32_t int128_getw1(Int128 x)
{
return int128_getlo(x) >> 32;
}
static Int128 int128_mul_6464(uint64_t ai, uint64_t bi)
{
Int128 a, b;
uint64_t pp0, pp1a, pp1b, pp1s, pp2;
uint64_t l, h;
a = int128_make64(ai);
b = int128_make64(bi);
pp0 = (uint64_t)int128_getw0(a) * (uint64_t)int128_getw0(b);
pp1a = (uint64_t)int128_getw1(a) * (uint64_t)int128_getw0(b);
pp1b = (uint64_t)int128_getw1(b) * (uint64_t)int128_getw0(a);
pp2 = (uint64_t)int128_getw1(a) * (uint64_t)int128_getw1(b);
pp1s = pp1a + pp1b;
if ((pp1s < pp1a) || (pp1s < pp1b)) {
pp2 += (1ULL << 32);
}
uint64_t ret_low = pp0 + (pp1s << 32);
if ((ret_low < pp0) || (ret_low < (pp1s << 32))) {
pp2 += 1;
}
return int128_make128(ret_low, pp2 + (pp1s >> 32));
mulu64(&l, &h, ai, bi);
return int128_make128(l, h);
}
static Int128 int128_sub_borrow(Int128 a, Int128 b, int borrow)