diff options
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/i586/memcopy.h | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/sysdeps/i386/i586/memcopy.h b/sysdeps/i386/i586/memcopy.h index 0a8768788e..d8928988f3 100644 --- a/sysdeps/i386/i586/memcopy.h +++ b/sysdeps/i386/i586/memcopy.h @@ -1,5 +1,5 @@ /* memcopy.h -- definitions for memory copy functions. Pentium version. - Copyright (C) 1994, 1995 Free Software Foundation, Inc. + Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc. Contributed by Torbjorn Granlund (tege@sics.se). This file is part of the GNU C Library. @@ -33,11 +33,14 @@ Cambridge, MA 02139, USA. */ { \ asm volatile ("subl $32,%2\n" \ "js 2f\n" \ + "movl 0(%0),%%edx\n" /* alloc dest line */ \ "1:\n" \ - "movl 0(%1),%%eax\n" \ - "movl 4(%1),%%edx\n" \ - "movl %%eax,0(%0)\n" \ - "movl %%edx,4(%0)\n" \ + "movl 28(%0),%%eax\n" /* alloc dest line */ \ + "subl $32,%2\n" /* decr loop count */ \ + "movl 0(%1),%%eax\n" /* U pipe */ \ + "movl 4(%1),%%edx\n" /* V pipe */ \ + "movl %%eax,0(%0)\n" /* U pipe */ \ + "movl %%edx,4(%0)\n" /* V pipe */ \ "movl 8(%1),%%eax\n" \ "movl 12(%1),%%edx\n" \ "movl %%eax,8(%0)\n" \ @@ -50,9 +53,8 @@ Cambridge, MA 02139, USA. */ "movl 28(%1),%%edx\n" \ "movl %%eax,24(%0)\n" \ "movl %%edx,28(%0)\n" \ - "addl $32,%1\n" \ - "addl $32,%0\n" \ - "subl $32,%2\n" \ + "leal 32(%1),%1\n" /* update src ptr */ \ + "leal 32(%0),%0\n" /* update dst ptr */ \ "jns 1b\n" \ "2: addl $32,%2" : \ "=r" (dst_bp), "=r" (src_bp), "=r" (nbytes_left) : \ @@ -66,7 +68,10 @@ Cambridge, MA 02139, USA. */ { \ asm volatile ("subl $32,%2\n" \ "js 2f\n" \ + "movl -4(%0),%%edx\n" \ "1:\n" \ + "movl -32(%0),%%eax\n" \ + "subl $32,%2\n" \ "movl -4(%1),%%eax\n" \ "movl -8(%1),%%edx\n" \ "movl %%eax,-4(%0)\n" \ @@ -83,9 +88,8 @@ Cambridge, MA 02139, USA. */ "movl -32(%1),%%edx\n" \ "movl %%eax,-28(%0)\n" \ "movl %%edx,-32(%0)\n" \ - "subl $32,%1\n" \ - "subl $32,%0\n" \ - "subl $32,%2\n" \ + "leal -32(%1),%1\n" \ + "leal -32(%0),%0\n" \ "jns 1b\n" \ "2: addl $32,%2" : \ "=r" (dst_ep), "=r" (src_ep), "=r" (nbytes_left) : \ |