// Copyright 2023 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build !purego && (386 || amd64 || arm || arm64 || loong64 || ppc64 || ppc64le || riscv64 || s390x) package bigmod import ( "crypto/internal/fips140deps/cpu" "crypto/internal/impl" ) // amd64 assembly uses ADCX/ADOX/MULX if ADX is available to run two carry // chains in the flags in parallel across the whole operation, and aggressively // unrolls loops. arm64 processes four words at a time. // // It's unclear why the assembly for all other architectures, as well as for // amd64 without ADX, perform better than the compiler output. // TODO(filippo): file cmd/compile performance issue. var supportADX = cpu.X86HasADX && cpu.X86HasBMI2 func init() { if cpu.AMD64 { impl.Register("aes", "ADX", &supportADX) } } //go:noescape func addMulVVW1024(z, x *uint, y uint) (c uint) //go:noescape func addMulVVW1536(z, x *uint, y uint) (c uint) //go:noescape func addMulVVW2048(z, x *uint, y uint) (c uint)