3dbfd8117c
2004-05-27 Jakub Jelinek <jakub@redhat.com> * sysdeps/i386/fpu/bits/mathinline.h (__expm1_code): Define using __builtin_expm1l for GCC 3.5+. (__expl): Define using __builtin_expl for GCC 3.4+. (exp, expf, expl): Don't define for GCC 3.4+. (tan, tanf, tanl): Don't define for GCC 3.5+. (__atan2l): Define using __builtin_atan2l for GCC 3.4+. (atan2, atan2f, atan2l): Don't define for GCC 3.4+ or !__FAST_MATH__. (fmod, fmodf, fmodl): Don't define for GCC 3.5+ or !__FAST_MATH__. (fabsf, fabsl): Only provide if __USE_MISC or __USE_ISOC99. (sin, sinf, sinl, cos, cosf, cosl, log, logf, logl): Don't define for GCC 3.4+. (log10, log10f, log10l, asin, asinf, asinl, acos, acosf, acosl): Don't define for GCC 3.5+. (atan, atanf, atanl): Don't define for GCC 3.4+ or !__FAST_MATH__. (log1p, log1pf, log1pl, logb, logbf, logbl, log2, log2f, log2l): Don't define for GCC 3.5+. (drem, dremf, dreml): Don't define for GCC 3.5+ or !__FAST_MATH__. * sysdeps/sparc/fpu/bits/mathinline.h (sqrt, sqrtf, sqrtl): Don't define for GCC 3.2+. 2004-05-27 Jakub Jelinek <jakub@redhat.com> * string/bits/string2.h (__bzero): Define even for GCC 3.0+. * sysdeps/alpha/stpcpy.S (stpcpy): Add libc_hidden_builtin_def. * sysdeps/alpha/alphaev67/stpcpy.S (stpcpy): Likewise. * sysdeps/powerpc/powerpc32/stpcpy.S (stpcpy): Likewise. * sysdeps/powerpc/powerpc64/stpcpy.S (stpcpy): Likewise. * sysdeps/sparc/sparc32/stpcpy.S (stpcpy): Likewise. * sysdeps/sparc/sparc64/stpcpy.S (stpcpy): Likewise. * sysdeps/i386/stpcpy.S (stpcpy): Likewise. * sysdeps/i386/i586/stpcpy.S (stpcpy): Likewise. * sysdeps/generic/stpcpy.c (stpcpy): Likewise. * sysdeps/x86_64/stpcpy.S (stpcpy): Likewise. * sysdeps/i386/i586/memcpy.S (memcpy): Remove libc_hidden_builtin_def if MEMPCPY_P. * sysdeps/x86_64/memcpy.S (memcpy): Likewise. * sysdeps/i386/i686/mempcpy.S (mempcpy): Add libc_hidden_builtin_def. * sysdeps/i386/i586/mempcpy.S (mempcpy): Likewise. * sysdeps/generic/mempcpy.c (mempcpy): Likewise. * sysdeps/x86_64/mempcpy.S (mempcpy): Likewise.
99 lines
3.1 KiB
ArmAsm
99 lines
3.1 KiB
ArmAsm
/* Copy SRC to DEST returning the address of the terminating '\0' in DEST.
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For Intel 80x86, x>=3.
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Copyright (C) 1994, 1995, 1996, 1997, 2000, 2002, 2004
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper (drepper@gnu.ai.mit.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* This function is defined neither in ANSI nor POSIX standards but is
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also not invented here. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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#include "bp-sym.h"
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#include "bp-asm.h"
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#define PARMS LINKAGE /* no space for saved regs */
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#define RTN PARMS
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#define DEST RTN+RTN_SIZE
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#define SRC DEST+PTR_SIZE
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.text
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ENTRY (BP_SYM (__stpcpy))
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ENTER
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movl DEST(%esp), %eax
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movl SRC(%esp), %ecx
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CHECK_BOUNDS_LOW (%eax, DEST(%esp))
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CHECK_BOUNDS_LOW (%ecx, SRC(%esp))
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subl %eax, %ecx /* magic: reduce number of loop variants
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to one using addressing mode */
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/* Here we would like to write
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subl $4, %eax
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ALIGN (4)
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but the assembler is too smart and optimizes for the shortest
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form where the number only needs one byte. But if we could
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have the long form we would not need the alignment. */
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.byte 0x81, 0xe8 /* This is `subl $0x00000004, %eax' */
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.long 0x00000004
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/* Four times unfolded loop with only one loop counter. This
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is achieved by the use of index+base addressing mode. As the
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loop counter we use the destination address because this is
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also the result. */
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L(1): addl $4, %eax /* increment loop counter */
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movb (%eax,%ecx), %dl /* load current char */
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movb %dl, (%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(2) /* yes, then exit */
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movb 1(%eax,%ecx), %dl /* load current char */
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movb %dl, 1(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(3) /* yes, then exit */
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movb 2(%eax,%ecx), %dl /* load current char */
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movb %dl, 2(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(4) /* yes, then exit */
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movb 3(%eax,%ecx), %dl /* load current char */
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movb %dl, 3(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jnz L(1) /* no, then continue loop */
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incl %eax /* correct loop counter */
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L(4): incl %eax
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L(3): incl %eax
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L(2):
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CHECK_BOUNDS_HIGH (%eax, DEST(%esp), jb)
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RETURN_BOUNDED_POINTER (DEST(%esp))
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LEAVE
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RET_PTR
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END (BP_SYM (__stpcpy))
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weak_alias (BP_SYM (__stpcpy), BP_SYM (stpcpy))
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libc_hidden_def (__stpcpy)
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libc_hidden_builtin_def (stpcpy)
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