mleku
14dc85cdc3
- Port field operations assembler from libsecp256k1 (field_amd64.s,
field_amd64_bmi2.s) with MULX/ADCX/ADOX instructions
- Add AVX2 scalar and affine point operations in avx/ package
- Implement CPU feature detection (cpufeatures.go) for AVX2/BMI2
- Add libsecp256k1.so via purego for native C library comparison
- Create comprehensive SIMD benchmark suite comparing btcec, P256K1
pure Go, P256K1 ASM, and libsecp256k1
- Add BENCHMARK_SIMD.md documenting performance across implementations
- Remove BtcecSigner, consolidate on P256K1Signer as primary impl
- Add field operation tests and benchmarks (field_asm_test.go,
field_bench_test.go)
- Update GLV endomorphism with wNAF scalar multiplication
- Add scalar assembly (scalar_amd64.s) for optimized operations
- Clean up dependencies and update benchmark reports
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
//go:build amd64
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package p256k1
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// fieldMulAsm multiplies two field elements using x86-64 assembly.
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// This is a direct port of bitcoin-core secp256k1_fe_mul_inner.
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// r, a, b are 5x52-bit limb representations.
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//
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//go:noescape
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func fieldMulAsm(r, a, b *FieldElement)
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// fieldSqrAsm squares a field element using x86-64 assembly.
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// This is a direct port of bitcoin-core secp256k1_fe_sqr_inner.
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// Squaring is optimized compared to multiplication.
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//
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//go:noescape
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func fieldSqrAsm(r, a *FieldElement)
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// fieldMulAsmBMI2 multiplies two field elements using BMI2+ADX instructions.
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// Uses MULX for flag-free multiplication enabling parallel carry chains.
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// r, a, b are 5x52-bit limb representations.
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//
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//go:noescape
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func fieldMulAsmBMI2(r, a, b *FieldElement)
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// fieldSqrAsmBMI2 squares a field element using BMI2+ADX instructions.
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// Uses MULX for flag-free multiplication.
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//
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//go:noescape
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func fieldSqrAsmBMI2(r, a *FieldElement)
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// hasFieldAsm returns true if field assembly is available.
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// On amd64, this is always true.
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func hasFieldAsm() bool {
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return true
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}
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// hasFieldAsmBMI2 returns true if BMI2+ADX optimized field assembly is available.
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func hasFieldAsmBMI2() bool {
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return HasBMI2()
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}
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