mirror of
https://github.com/golang/go
synced 2024-10-04 22:21:22 -06:00
b3946dc119
Uses SSE instructions to process 16 bytes at a time. fixes #5354 R=bradfitz, google CC=golang-dev https://golang.org/cl/8853048
74 lines
1.2 KiB
Plaintext
74 lines
1.2 KiB
Plaintext
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Routines that are implemented in assembly in asm_{amd64,386}.s
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// but are implemented in C for arm.
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package runtime
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#include "runtime.h"
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#pragma textflag 7
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func cmpstring(s1 String, s2 String) (v int) {
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uintgo i, l;
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byte c1, c2;
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l = s1.len;
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if(s2.len < l)
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l = s2.len;
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for(i=0; i<l; i++) {
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c1 = s1.str[i];
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c2 = s2.str[i];
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if(c1 < c2) {
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v = -1;
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goto done;
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}
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if(c1 > c2) {
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v = +1;
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goto done;
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}
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}
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if(s1.len < s2.len) {
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v = -1;
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goto done;
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}
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if(s1.len > s2.len) {
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v = +1;
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goto done;
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}
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v = 0;
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done:;
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}
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#pragma textflag 7
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func bytes·Compare(s1 Slice, s2 Slice) (v int) {
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uintgo i, l;
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byte c1, c2;
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l = s1.len;
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if(s2.len < l)
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l = s2.len;
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for(i=0; i<l; i++) {
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c1 = s1.array[i];
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c2 = s2.array[i];
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if(c1 < c2) {
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v = -1;
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goto done;
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}
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if(c1 > c2) {
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v = +1;
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goto done;
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}
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}
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if(s1.len < s2.len) {
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v = -1;
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goto done;
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}
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if(s1.len > s2.len) {
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v = +1;
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goto done;
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}
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v = 0;
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done:;
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}
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