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fix x86 implementations for compress128/expand128

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Konstantinos Margaritis 2021-02-15 13:50:16 +02:00 committed by Konstantinos Margaritis
parent e21305aa23
commit c3c68b1c3f
1 changed files with 21 additions and 4 deletions
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25
src/util/arch/x86/bitutils.h
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@ -215,8 +215,16 @@ u64a compress64_impl(u64a x, u64a m) {
}
static really_inline
m128 compress128_impl(m128 x, m128 m) {
return compress128_impl_c(x, m);
m128 compress128_impl(m128 xvec, m128 mvec) {
u64a ALIGN_ATTR(16) x[2];
u64a ALIGN_ATTR(16) m[2];
store128(x, xvec);
store128(m, mvec);
x[0] = compress64_impl(x[0], m[0]);
x[1] = compress64_impl(x[1], m[1]);
return load128(x);
}
static really_inline
@ -233,6 +241,7 @@ static really_inline
u64a expand64_impl(u64a x, u64a m) {
#if defined(ARCH_X86_64) && defined(HAVE_BMI2)
// BMI2 has a single instruction for this operation.
DEBUG_PRINTF("pdep_u64\n");
return _pdep_u64(x, m);
#else
return expand64_impl_c(x, m);
@ -240,8 +249,16 @@ u64a expand64_impl(u64a x, u64a m) {
}
static really_inline
m128 expand128_impl(m128 x, m128 m) {
return expand128_impl_c(x, m);
m128 expand128_impl(m128 xvec, m128 mvec) {
u64a ALIGN_ATTR(16) x[2];
u64a ALIGN_ATTR(16) m[2];
store128(x, xvec);
store128(m, mvec);
DEBUG_PRINTF("calling expand64_impl:\n");
x[0] = expand64_impl(x[0], m[0]);
x[1] = expand64_impl(x[1], m[1]);
return load128(x);
}
/* returns the first set bit after begin (if not ~0U). If no bit is set after