Server : LiteSpeed System : Linux us-phx-web1202.main-hosting.eu 4.18.0-553.84.1.lve.el8.x86_64 #1 SMP Tue Nov 25 18:33:03 UTC 2025 x86_64 User : u615232177 ( 615232177) PHP Version : 8.1.33 Disable Function : NONE Directory :  /opt/golang/1.22.0/src/crypto/sha1/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

// Copyright 2016 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.

package sha1

import "internal/cpu"

//go:noescape
func blockAVX2(dig *digest, p []byte)

//go:noescape
func blockAMD64(dig *digest, p []byte)

var useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI1 && cpu.X86.HasBMI2

func block(dig *digest, p []byte) {
	if useAVX2 && len(p) >= 256 {
		// blockAVX2 calculates sha1 for 2 block per iteration
		// it also interleaves precalculation for next block.
		// So it may read up-to 192 bytes past end of p
		// We may add checks inside blockAVX2, but this will
		// just turn it into a copy of blockAMD64,
		// so call it directly, instead.
		safeLen := len(p) - 128
		if safeLen%128 != 0 {
			safeLen -= 64
		}
		blockAVX2(dig, p[:safeLen])
		blockAMD64(dig, p[safeLen:])
	} else {
		blockAMD64(dig, p)
	}
}