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vectorize replace 🎭 #4554

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Apr 9, 2024
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Add #ifndef _M_ARM64EC guards.
StephanTLavavej committed Apr 4, 2024
commit 9a6a0d541525bcc06d6be8d480b686219baba097
10 changes: 8 additions & 2 deletions stl/src/vector_algorithms.cpp
Original file line number Diff line number Diff line change
@@ -2274,6 +2274,7 @@ __declspec(noalias) size_t

__declspec(noalias) void __stdcall __std_replace_4(
void* _First, void* const _Last, const uint32_t _Old_val, const uint32_t _New_val) noexcept {
#ifndef _M_ARM64EC
if (_Use_avx2()) {
const __m256i _Comparand = _mm256_broadcastd_epi32(_mm_cvtsi32_si128(_Old_val));
const __m256i _Replacement = _mm256_broadcastd_epi32(_mm_cvtsi32_si128(_New_val));
@@ -2296,7 +2297,9 @@ __declspec(noalias) void __stdcall __std_replace_4(
const __m256i _Mask = _mm256_and_si256(_mm256_cmpeq_epi32(_Comparand, _Data), _Tail_mask);
_mm256_maskstore_epi32(reinterpret_cast<int*>(_First), _Mask, _Replacement);
}
} else {
} else
#endif // !defined(_M_ARM64EC)
{
for (auto _Cur = reinterpret_cast<uint32_t*>(_First); _Cur != _Last; ++_Cur) {
if (*_Cur == _Old_val) {
*_Cur = _New_val;
@@ -2307,6 +2310,7 @@ __declspec(noalias) void __stdcall __std_replace_4(

__declspec(noalias) void __stdcall __std_replace_8(
void* _First, void* const _Last, const uint64_t _Old_val, const uint64_t _New_val) noexcept {
#ifndef _M_ARM64EC
if (_Use_avx2()) {
#ifdef _WIN64
const __m256i _Comparand = _mm256_broadcastq_epi64(_mm_cvtsi64_si128(_Old_val));
@@ -2334,7 +2338,9 @@ __declspec(noalias) void __stdcall __std_replace_8(
const __m256i _Mask = _mm256_and_si256(_mm256_cmpeq_epi64(_Comparand, _Data), _Tail_mask);
_mm256_maskstore_epi64(reinterpret_cast<long long*>(_First), _Mask, _Replacement);
}
} else {
} else
#endif // !defined(_M_ARM64EC)
{
for (auto _Cur = reinterpret_cast<uint64_t*>(_First); _Cur != _Last; ++_Cur) {
if (*_Cur == _Old_val) {
*_Cur = _New_val;