278 lines
7.4 KiB
C
278 lines
7.4 KiB
C
#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "blake3_impl.h"
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#if defined(IS_X86)
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#if defined(_MSC_VER)
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#include <intrin.h>
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#elif defined(__GNUC__)
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#include <immintrin.h>
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#else
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#error "Unimplemented!"
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#endif
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#endif
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#define MAYBE_UNUSED(x) (void)((x))
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#if defined(IS_X86)
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static uint64_t xgetbv(void) {
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#if defined(_MSC_VER)
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return _xgetbv(0);
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#else
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uint32_t eax = 0, edx = 0;
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__asm__ __volatile__("xgetbv\n" : "=a"(eax), "=d"(edx) : "c"(0));
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return ((uint64_t)edx << 32) | eax;
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#endif
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}
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static void cpuid(uint32_t out[4], uint32_t id) {
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#if defined(_MSC_VER)
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__cpuid((int *)out, id);
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#elif defined(__i386__) || defined(_M_IX86)
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__asm__ __volatile__("movl %%ebx, %1\n"
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"cpuid\n"
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"xchgl %1, %%ebx\n"
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: "=a"(out[0]), "=r"(out[1]), "=c"(out[2]), "=d"(out[3])
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: "a"(id));
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#else
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__asm__ __volatile__("cpuid\n"
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: "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3])
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: "a"(id));
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#endif
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}
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static void cpuidex(uint32_t out[4], uint32_t id, uint32_t sid) {
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#if defined(_MSC_VER)
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__cpuidex((int *)out, id, sid);
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#elif defined(__i386__) || defined(_M_IX86)
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__asm__ __volatile__("movl %%ebx, %1\n"
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"cpuid\n"
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"xchgl %1, %%ebx\n"
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: "=a"(out[0]), "=r"(out[1]), "=c"(out[2]), "=d"(out[3])
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: "a"(id), "c"(sid));
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#else
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__asm__ __volatile__("cpuid\n"
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: "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3])
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: "a"(id), "c"(sid));
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#endif
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}
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#endif
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enum cpu_feature {
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SSE2 = 1 << 0,
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SSSE3 = 1 << 1,
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SSE41 = 1 << 2,
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AVX = 1 << 3,
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AVX2 = 1 << 4,
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AVX512F = 1 << 5,
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AVX512VL = 1 << 6,
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/* ... */
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UNDEFINED = 1 << 30
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};
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#if !defined(BLAKE3_TESTING)
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static /* Allow the variable to be controlled manually for testing */
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#endif
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enum cpu_feature g_cpu_features = UNDEFINED;
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LLVM_ATTRIBUTE_USED
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#if !defined(BLAKE3_TESTING)
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static
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#endif
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enum cpu_feature
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get_cpu_features(void) {
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if (g_cpu_features != UNDEFINED) {
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return g_cpu_features;
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} else {
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#if defined(IS_X86)
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uint32_t regs[4] = {0};
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uint32_t *eax = ®s[0], *ebx = ®s[1], *ecx = ®s[2], *edx = ®s[3];
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(void)edx;
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enum cpu_feature features = 0;
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cpuid(regs, 0);
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const int max_id = *eax;
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cpuid(regs, 1);
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#if defined(__amd64__) || defined(_M_X64)
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features |= SSE2;
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#else
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if (*edx & (1UL << 26))
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features |= SSE2;
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#endif
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if (*ecx & (1UL << 0))
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features |= SSSE3;
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if (*ecx & (1UL << 19))
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features |= SSE41;
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if (*ecx & (1UL << 27)) { // OSXSAVE
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const uint64_t mask = xgetbv();
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if ((mask & 6) == 6) { // SSE and AVX states
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if (*ecx & (1UL << 28))
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features |= AVX;
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if (max_id >= 7) {
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cpuidex(regs, 7, 0);
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if (*ebx & (1UL << 5))
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features |= AVX2;
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if ((mask & 224) == 224) { // Opmask, ZMM_Hi256, Hi16_Zmm
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if (*ebx & (1UL << 31))
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features |= AVX512VL;
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if (*ebx & (1UL << 16))
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features |= AVX512F;
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}
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}
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}
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}
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g_cpu_features = features;
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return features;
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#else
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/* How to detect NEON? */
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return 0;
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#endif
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}
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}
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void blake3_compress_in_place(uint32_t cv[8],
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const uint8_t block[BLAKE3_BLOCK_LEN],
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uint8_t block_len, uint64_t counter,
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uint8_t flags) {
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#if defined(IS_X86)
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const enum cpu_feature features = get_cpu_features();
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MAYBE_UNUSED(features);
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#if !defined(BLAKE3_NO_AVX512)
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if (features & AVX512VL) {
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blake3_compress_in_place_avx512(cv, block, block_len, counter, flags);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE41)
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if (features & SSE41) {
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blake3_compress_in_place_sse41(cv, block, block_len, counter, flags);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE2)
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if (features & SSE2) {
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blake3_compress_in_place_sse2(cv, block, block_len, counter, flags);
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return;
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}
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#endif
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#endif
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blake3_compress_in_place_portable(cv, block, block_len, counter, flags);
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}
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void blake3_compress_xof(const uint32_t cv[8],
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const uint8_t block[BLAKE3_BLOCK_LEN],
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uint8_t block_len, uint64_t counter, uint8_t flags,
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uint8_t out[64]) {
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#if defined(IS_X86)
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const enum cpu_feature features = get_cpu_features();
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MAYBE_UNUSED(features);
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#if !defined(BLAKE3_NO_AVX512)
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if (features & AVX512VL) {
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blake3_compress_xof_avx512(cv, block, block_len, counter, flags, out);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE41)
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if (features & SSE41) {
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blake3_compress_xof_sse41(cv, block, block_len, counter, flags, out);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE2)
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if (features & SSE2) {
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blake3_compress_xof_sse2(cv, block, block_len, counter, flags, out);
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return;
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}
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#endif
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#endif
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blake3_compress_xof_portable(cv, block, block_len, counter, flags, out);
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}
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void blake3_hash_many(const uint8_t *const *inputs, size_t num_inputs,
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size_t blocks, const uint32_t key[8], uint64_t counter,
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bool increment_counter, uint8_t flags,
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uint8_t flags_start, uint8_t flags_end, uint8_t *out) {
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#if defined(IS_X86)
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const enum cpu_feature features = get_cpu_features();
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MAYBE_UNUSED(features);
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#if !defined(BLAKE3_NO_AVX512)
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if ((features & (AVX512F|AVX512VL)) == (AVX512F|AVX512VL)) {
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blake3_hash_many_avx512(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end,
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out);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_AVX2)
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if (features & AVX2) {
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blake3_hash_many_avx2(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end,
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out);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE41)
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if (features & SSE41) {
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blake3_hash_many_sse41(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end,
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out);
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return;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE2)
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if (features & SSE2) {
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blake3_hash_many_sse2(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end,
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out);
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return;
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}
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#endif
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#endif
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#if BLAKE3_USE_NEON == 1
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blake3_hash_many_neon(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end, out);
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return;
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#endif
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blake3_hash_many_portable(inputs, num_inputs, blocks, key, counter,
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increment_counter, flags, flags_start, flags_end,
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out);
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}
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// The dynamically detected SIMD degree of the current platform.
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size_t blake3_simd_degree(void) {
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#if defined(IS_X86)
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const enum cpu_feature features = get_cpu_features();
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MAYBE_UNUSED(features);
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#if !defined(BLAKE3_NO_AVX512)
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if ((features & (AVX512F|AVX512VL)) == (AVX512F|AVX512VL)) {
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return 16;
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}
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#endif
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#if !defined(BLAKE3_NO_AVX2)
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if (features & AVX2) {
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return 8;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE41)
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if (features & SSE41) {
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return 4;
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}
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#endif
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#if !defined(BLAKE3_NO_SSE2)
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if (features & SSE2) {
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return 4;
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}
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#endif
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#endif
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#if BLAKE3_USE_NEON == 1
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return 4;
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#endif
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return 1;
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}
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