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Use unaligned stores

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Makes no measurable difference in the benchmark. And will eventually
allow us to process larger chunks of data without need to reset a bunch
of vector registers to constant values each time.
This commit is contained in:
Kovid Goyal
2024-02-01 11:29:59 +05:30
parent 77cfd44f24
commit d987ffe49a
1 changed files with 11 additions and 11 deletions
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22
kitty/simd-string-impl.h
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@@ -52,7 +52,7 @@ END_IGNORE_DIAGNOSTIC
#define add_epi8 simde_mm_add_epi8
#define load_unaligned simde_mm_loadu_si128
#define load_aligned simde_mm_load_si128
#define store_aligned simde_mm_store_si128
#define store_unaligned simde_mm_storeu_si128
#define cmpeq_epi8 simde_mm_cmpeq_epi8
#define cmplt_epi8 simde_mm_cmplt_epi8
#define cmpgt_epi8 simde_mm_cmpgt_epi8
@@ -93,7 +93,7 @@ FUNC(is_zero)(const integer_t a) { return simde_mm_testz_si128(a, a); }
#define add_epi8 simde_mm256_add_epi8
#define load_unaligned simde_mm256_loadu_si256
#define load_aligned simde_mm256_load_si256
#define store_aligned simde_mm256_store_si256
#define store_unaligned simde_mm256_storeu_si256
#define cmpeq_epi8 simde_mm256_cmpeq_epi8
#define cmpgt_epi8 simde_mm256_cmpgt_epi8
#define cmplt_epi8(a, b) cmpgt_epi8(b, a)
@@ -190,7 +190,7 @@ static inline integer_t shuffle_impl256(const integer_t value, const integer_t s
#define print_register_as_bytes(r) { \
printf("%s:\n", #r); \
alignas(64) uint8_t data[sizeof(r)]; \
store_aligned((integer_t*)data, r); \
store_unaligned((integer_t*)data, r); \
for (unsigned i = 0; i < sizeof(integer_t); i++) { \
uint8_t ch = data[i]; \
if (' ' <= ch && ch < 0x7f) printf("_%c ", ch); else printf("%.2x ", ch); \
@@ -289,26 +289,26 @@ FUNC(output_plain_ascii)(UTF8Decoder *d, integer_t vec, size_t src_sz) {
#if KITTY_SIMD_LEVEL == 128
for (const uint32_t *limit = d->output + src_sz, *p = d->output; p < limit; p += output_increment) {
const integer_t unpacked = extract_lower_quarter_as_chars(vec);
store_aligned((integer_t*)p, unpacked);
store_unaligned((integer_t*)p, unpacked);
vec = shift_right_by_bytes128(vec, output_increment);
}
#else
const uint32_t *limit = d->output + src_sz, *p = d->output;
simde__m128i x = simde_mm256_extracti128_si256(vec, 0);
integer_t unpacked = extract_lower_half_as_chars(x);
store_aligned((integer_t*)p, unpacked); p += output_increment;
store_unaligned((integer_t*)p, unpacked); p += output_increment;
if (p < limit) {
x = shift_right_by_bytes128(x, output_increment);
unpacked = extract_lower_half_as_chars(x);
store_aligned((integer_t*)p, unpacked); p += output_increment;
store_unaligned((integer_t*)p, unpacked); p += output_increment;
if (p < limit) {
x = simde_mm256_extracti128_si256(vec, 1);
unpacked = extract_lower_half_as_chars(x);
store_aligned((integer_t*)p, unpacked); p += output_increment;
store_unaligned((integer_t*)p, unpacked); p += output_increment;
if (p < limit) {
x = shift_right_by_bytes128(x, output_increment);
unpacked = extract_lower_half_as_chars(x);
store_aligned((integer_t*)p, unpacked); p += output_increment;
store_unaligned((integer_t*)p, unpacked); p += output_increment;
}
}
}
@@ -324,7 +324,7 @@ FUNC(output_unicode)(UTF8Decoder *d, integer_t output1, integer_t output2, integ
const integer_t unpacked2 = shift_right_by_one_byte(extract_lower_quarter_as_chars(output2));
const integer_t unpacked3 = shift_right_by_two_bytes(extract_lower_quarter_as_chars(output3));
const integer_t unpacked = or_si(or_si(unpacked1, unpacked2), unpacked3);
store_aligned((integer_t*)p, unpacked);
store_unaligned((integer_t*)p, unpacked);
output1 = shift_right_by_bytes128(output1, output_increment);
output2 = shift_right_by_bytes128(output2, output_increment);
output3 = shift_right_by_bytes128(output3, output_increment);
@@ -337,7 +337,7 @@ FUNC(output_unicode)(UTF8Decoder *d, integer_t output1, integer_t output2, integ
const integer_t unpacked1 = extract_lower_half_as_chars(x1); \
const integer_t unpacked2 = shift_right_by_one_byte(extract_lower_half_as_chars(x2)); \
const integer_t unpacked3 = shift_right_by_two_bytes(extract_lower_half_as_chars(x3)); \
store_aligned((integer_t*)p, or_si(or_si(unpacked1, unpacked2), unpacked3)); \
store_unaligned((integer_t*)p, or_si(or_si(unpacked1, unpacked2), unpacked3)); \
p += output_increment; \
}
#define extract(which) x1 = simde_mm256_extracti128_si256(output1, which); x2 = simde_mm256_extracti128_si256(output2, which); x3 = simde_mm256_extracti128_si256(output3, which);
@@ -601,7 +601,7 @@ invalid_utf8:
#undef set_epi8
#undef load_unaligned
#undef load_aligned
#undef store_aligned
#undef store_unaligned
#undef cmpeq_epi8
#undef cmplt_epi8
#undef cmpgt_epi8