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This commit is contained in:
QuFY
2025-09-20 17:13:38 +08:00
parent 7787b3ee30
commit 28ff2b0264
5251 changed files with 345029 additions and 285168 deletions
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18
Pods/abseil/absl/crc/internal/crc_x86_arm_combined.cc generated
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@@ -101,13 +101,17 @@ constexpr size_t kMediumCutoff = 2048;
namespace {
uint32_t multiply(uint32_t a, uint32_t b) {
V128 shifts = V128_From2x64(0, 1);
V128 power = V128_From2x64(0, a);
V128 crc = V128_From2x64(0, b);
V128 power = V128_From64WithZeroFill(a);
V128 crc = V128_From64WithZeroFill(b);
V128 res = V128_PMulLow(power, crc);
// Combine crc values
res = V128_ShiftLeft64(res, shifts);
// Combine crc values.
//
// Adding res to itself is equivalent to multiplying by 2,
// or shifting left by 1. Addition is used as not all compilers
// are able to generate optimal code without this hint.
// https://godbolt.org/z/rr3fMnf39
res = V128_Add64(res, res);
return static_cast<uint32_t>(V128_Extract32<1>(res)) ^
CRC32_u32(0, static_cast<uint32_t>(V128_Low64(res)));
}
@@ -444,11 +448,11 @@ class CRC32AcceleratedX86ARMCombinedMultipleStreams
V128 magic = *(reinterpret_cast<const V128*>(kClmulConstants) + bs - 1);
V128 tmp = V128_From2x64(0, l64);
V128 tmp = V128_From64WithZeroFill(l64);
V128 res1 = V128_PMulLow(tmp, magic);
tmp = V128_From2x64(0, l641);
tmp = V128_From64WithZeroFill(l641);
V128 res2 = V128_PMul10(tmp, magic);
V128 x = V128_Xor(res1, res2);