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[Base] Enable aligned copy and swap routines

This commit is contained in:
DrChat 2018-02-14 20:28:34 -06:00
parent e54c24e150
commit b17d6f5088
1 changed files with 80 additions and 8 deletions
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88
src/xenia/base/memory.cc
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@ -24,8 +24,20 @@ void copy_128_aligned(void* dest, const void* src, size_t count) {
}
#if XE_ARCH_AMD64
void copy_and_swap_16_aligned(void* dest, const void* src, size_t count) {
return copy_and_swap_16_unaligned(dest, src, count);
void copy_and_swap_16_aligned(void* dest_ptr, const void* src_ptr,
size_t count) {
auto dest = reinterpret_cast<uint16_t*>(dest_ptr);
auto src = reinterpret_cast<const uint16_t*>(src_ptr);
size_t i;
for (i = 0; i + 8 <= count; i += 8) {
__m128i input = _mm_load_si128(reinterpret_cast<const __m128i*>(&src[i]));
__m128i output =
_mm_or_si128(_mm_slli_epi16(input, 8), _mm_srli_epi16(input, 8));
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[i]), output);
}
for (; i < count; ++i) { // handle residual elements
dest[i] = byte_swap(src[i]);
}
}
void copy_and_swap_16_unaligned(void* dest_ptr, const void* src_ptr,
@ -44,8 +56,31 @@ void copy_and_swap_16_unaligned(void* dest_ptr, const void* src_ptr,
}
}
void copy_and_swap_32_aligned(void* dest, const void* src, size_t count) {
return copy_and_swap_32_unaligned(dest, src, count);
void copy_and_swap_32_aligned(void* dest_ptr, const void* src_ptr,
size_t count) {
auto dest = reinterpret_cast<uint32_t*>(dest_ptr);
auto src = reinterpret_cast<const uint32_t*>(src_ptr);
__m128i byte2mask = _mm_set1_epi32(0x00FF0000);
__m128i byte3mask = _mm_set1_epi32(0x0000FF00);
size_t i;
for (i = 0; i + 4 <= count; i += 4) {
__m128i input = _mm_load_si128(reinterpret_cast<const __m128i*>(&src[i]));
// Do the four shifts.
__m128i byte1 = _mm_slli_epi32(input, 24);
__m128i byte2 = _mm_slli_epi32(input, 8);
__m128i byte3 = _mm_srli_epi32(input, 8);
__m128i byte4 = _mm_srli_epi32(input, 24);
// OR bytes together.
__m128i output = _mm_or_si128(byte1, byte4);
byte2 = _mm_and_si128(byte2, byte2mask);
output = _mm_or_si128(output, byte2);
byte3 = _mm_and_si128(byte3, byte3mask);
output = _mm_or_si128(output, byte3);
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[i]), output);
}
for (; i < count; ++i) { // handle residual elements
dest[i] = byte_swap(src[i]);
}
}
void copy_and_swap_32_unaligned(void* dest_ptr, const void* src_ptr,
@ -75,8 +110,33 @@ void copy_and_swap_32_unaligned(void* dest_ptr, const void* src_ptr,
}
}
void copy_and_swap_64_aligned(void* dest, const void* src, size_t count) {
return copy_and_swap_64_unaligned(dest, src, count);
void copy_and_swap_64_aligned(void* dest_ptr, const void* src_ptr,
size_t count) {
auto dest = reinterpret_cast<uint64_t*>(dest_ptr);
auto src = reinterpret_cast<const uint64_t*>(src_ptr);
__m128i byte2mask = _mm_set1_epi32(0x00FF0000);
__m128i byte3mask = _mm_set1_epi32(0x0000FF00);
size_t i;
for (i = 0; i + 2 <= count; i += 2) {
__m128i input = _mm_load_si128(reinterpret_cast<const __m128i*>(&src[i]));
// Do the four shifts.
__m128i byte1 = _mm_slli_epi32(input, 24);
__m128i byte2 = _mm_slli_epi32(input, 8);
__m128i byte3 = _mm_srli_epi32(input, 8);
__m128i byte4 = _mm_srli_epi32(input, 24);
// OR bytes together.
__m128i output = _mm_or_si128(byte1, byte4);
byte2 = _mm_and_si128(byte2, byte2mask);
output = _mm_or_si128(output, byte2);
byte3 = _mm_and_si128(byte3, byte3mask);
output = _mm_or_si128(output, byte3);
// Reorder the two words.
output = _mm_shuffle_epi32(output, _MM_SHUFFLE(2, 3, 0, 1));
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[i]), output);
}
for (; i < count; ++i) { // handle residual elements
dest[i] = byte_swap(src[i]);
}
}
void copy_and_swap_64_unaligned(void* dest_ptr, const void* src_ptr,
@ -108,8 +168,20 @@ void copy_and_swap_64_unaligned(void* dest_ptr, const void* src_ptr,
}
}
void copy_and_swap_16_in_32_aligned(void* dest, const void* src, size_t count) {
return copy_and_swap_16_in_32_unaligned(dest, src, count);
void copy_and_swap_16_in_32_aligned(void* dest_ptr, const void* src_ptr,
size_t count) {
auto dest = reinterpret_cast<uint64_t*>(dest_ptr);
auto src = reinterpret_cast<const uint64_t*>(src_ptr);
size_t i;
for (i = 0; i + 4 <= count; i += 4) {
__m128i input = _mm_load_si128(reinterpret_cast<const __m128i*>(&src[i]));
__m128i output =
_mm_or_si128(_mm_slli_epi32(input, 16), _mm_srli_epi32(input, 16));
_mm_store_si128(reinterpret_cast<__m128i*>(&dest[i]), output);
}
for (; i < count; ++i) { // handle residual elements
dest[i] = (src[i] >> 16) | (src[i] << 16);
}
}
void copy_and_swap_16_in_32_unaligned(void* dest_ptr, const void* src_ptr,