43d241c28d
- Add arena allocator for zero-allocation hot paths - Add thread pool for parallel operations - Add mmap utilities for memory-mapped I/O - Implement queue_index with heap-based priority queue - Implement dataset_hash with SIMD support (SHA-NI, ARMv8) - Add runtime SIMD detection for cross-platform correctness - Add comprehensive tests and benchmarks
34 lines
991 B
C++
34 lines
991 B
C++
#include "sha256_base.h"
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// Intel SHA-NI (SHA Extensions) implementation
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#if defined(__x86_64__) || defined(_M_X64)
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#include <cpuid.h>
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#include <immintrin.h>
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// TODO: Full SHA-NI implementation using:
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// _mm_sha256msg1_epu32, _mm_sha256msg2_epu32 for message schedule
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// _mm_sha256rnds2_epu32 for rounds
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// For now, falls back to generic (implementation placeholder)
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static void transform_sha_ni(uint32_t* state, const uint8_t* data) {
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// Placeholder: full implementation would use SHA-NI intrinsics
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// This requires message scheduling with sha256msg1/sha256msg2
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// and rounds with sha256rnds2
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transform_generic(state, data);
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}
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TransformFunc detect_x86_transform(void) {
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unsigned int eax, ebx, ecx, edx;
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if (__get_cpuid(7, &eax, &ebx, &ecx, &edx)) {
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if (ebx & (1 << 29)) { // SHA bit
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return transform_sha_ni;
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}
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}
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return nullptr;
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}
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#else // No x86 support
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TransformFunc detect_x86_transform(void) { return nullptr; }
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#endif
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