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Shorten x86-64 strlen a bit.

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This commit is contained in:
Ulrich Drepper 2010-08-26 22:12:16 -07:00
parent 623aac7f84
commit 107b2fa56c
1 changed files with 3 additions and 7 deletions
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10
sysdeps/x86_64/strlen.S
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@ -1,7 +1,6 @@
/* strlen(str) -- determine the length of the string STR.
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
Modified by Intel Corporation.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -85,22 +84,19 @@ L(exit_less16):
L(exit16):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $16, %rax
lea 16(%rdx), %rax
ret
.p2align 4
L(exit32):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $32, %rax
lea 32(%rdx), %rax
ret
.p2align 4
L(exit48):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $48, %rax
lea 48(%rdx), %rax
ret
END(strlen)
libc_hidden_builtin_def (strlen)