| // 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) | |