diff options
Diffstat (limited to 'sysdeps/i386/i586/strchr.S')
| -rw-r--r-- | sysdeps/i386/i586/strchr.S | 35 |
1 files changed, 10 insertions, 25 deletions
diff --git a/sysdeps/i386/i586/strchr.S b/sysdeps/i386/i586/strchr.S index 136b19a3f3..9df504d335 100644 --- a/sysdeps/i386/i586/strchr.S +++ b/sysdeps/i386/i586/strchr.S @@ -1,6 +1,6 @@ /* Find character CH in a NUL terminated string. Highly optimized version for ix85, x>=5. - Copyright (C) 1995,1996,1997,2000,2003,2005 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>. @@ -47,21 +47,16 @@ ENTRY (BP_SYM (strchr)) ENTER pushl %edi /* Save callee-safe registers. */ - cfi_adjust_cfa_offset (-4) pushl %esi - cfi_adjust_cfa_offset (-4) pushl %ebx - cfi_adjust_cfa_offset (-4) pushl %ebp - cfi_adjust_cfa_offset (-4) movl STR(%esp), %eax movl CHR(%esp), %edx CHECK_BOUNDS_LOW (%eax, STR(%esp)) movl %eax, %edi /* duplicate string pointer for later */ - cfi_rel_offset (edi, 12) xorl %ecx, %ecx /* clear %ecx */ /* At the moment %edx contains C. What we need for the @@ -112,10 +107,6 @@ L(0): movb (%eax), %cl /* load single byte */ incl %eax /* increment pointer */ - cfi_rel_offset (esi, 8) - cfi_rel_offset (ebx, 4) - cfi_rel_offset (ebp, 0) - /* The following code is the preparation for the loop. The four instruction up to `L1' will not be executed in the loop because the same code is found at the end of the loop, but @@ -292,28 +283,15 @@ L(5): subl $4, %eax /* adjust pointer */ L(2): CHECK_BOUNDS_HIGH (%eax, STR(%esp), jb) RETURN_BOUNDED_POINTER (STR(%esp)) -L(out): popl %ebp /* restore saved registers */ - cfi_adjust_cfa_offset (-4) - cfi_restore (ebp) + popl %ebp /* restore saved registers */ popl %ebx - cfi_adjust_cfa_offset (-4) - cfi_restore (ebx) popl %esi - cfi_adjust_cfa_offset (-4) - cfi_restore (esi) popl %edi - cfi_adjust_cfa_offset (-4) - cfi_restore (edi) LEAVE RET_PTR - cfi_adjust_cfa_offset (16) - cfi_rel_offset (edi, 12) - cfi_rel_offset (esi, 8) - cfi_rel_offset (ebx, 4) - cfi_rel_offset (ebp, 0) /* We know there is a NUL byte in the word. But we have to test whether there is an C byte before it in the word. */ L(4): subl $4, %eax /* adjust pointer */ @@ -349,7 +327,14 @@ L(4): subl $4, %eax /* adjust pointer */ L(3): xorl %eax, %eax RETURN_NULL_BOUNDED_POINTER - jmp L(out) + popl %ebp /* restore saved registers */ + popl %ebx + + popl %esi + popl %edi + + LEAVE + RET_PTR END (BP_SYM (strchr)) #undef index |