| /* Add two limb vectors of the same length > 0 and store sum in a third |
| limb vector. |
| Copyright (C) 1992,94,95,97,98,2000,2005 Free Software Foundation, Inc. |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| MA 02111-1307, USA. */ |
| |
| #include "sysdep.h" |
| #include "asm-syntax.h" |
| #include "bp-sym.h" |
| #include "bp-asm.h" |
| |
| #define PARMS LINKAGE+8 /* space for 2 saved regs */ |
| #define RES PARMS |
| #define S1 RES+PTR_SIZE |
| #define S2 S1+PTR_SIZE |
| #define SIZE S2+PTR_SIZE |
| |
| .text |
| #ifdef PIC |
| L(1): addl (%esp), %eax |
| ret |
| #endif |
| ENTRY (BP_SYM (__mpn_add_n)) |
| ENTER |
| |
| pushl %edi |
| cfi_adjust_cfa_offset (4) |
| pushl %esi |
| cfi_adjust_cfa_offset (4) |
| |
| movl RES(%esp),%edi |
| cfi_rel_offset (edi, 4) |
| movl S1(%esp),%esi |
| cfi_rel_offset (esi, 0) |
| movl S2(%esp),%edx |
| movl SIZE(%esp),%ecx |
| #if __BOUNDED_POINTERS__ |
| shll $2, %ecx /* convert limbs to bytes */ |
| CHECK_BOUNDS_BOTH_WIDE (%edi, RES(%esp), %ecx) |
| CHECK_BOUNDS_BOTH_WIDE (%esi, S1(%esp), %ecx) |
| CHECK_BOUNDS_BOTH_WIDE (%edx, S2(%esp), %ecx) |
| shrl $2, %ecx |
| #endif |
| movl %ecx,%eax |
| shrl $3,%ecx /* compute count for unrolled loop */ |
| negl %eax |
| andl $7,%eax /* get index where to start loop */ |
| jz L(oop) /* necessary special case for 0 */ |
| incl %ecx /* adjust loop count */ |
| shll $2,%eax /* adjustment for pointers... */ |
| subl %eax,%edi /* ... since they are offset ... */ |
| subl %eax,%esi /* ... by a constant when we ... */ |
| subl %eax,%edx /* ... enter the loop */ |
| shrl $2,%eax /* restore previous value */ |
| #ifdef PIC |
| /* Calculate start address in loop for PIC. */ |
| leal (L(oop)-L(0)-3)(%eax,%eax,8),%eax |
| call L(1) |
| L(0): |
| #else |
| /* Calculate start address in loop for non-PIC. */ |
| leal (L(oop) - 3)(%eax,%eax,8),%eax |
| #endif |
| jmp *%eax /* jump into loop */ |
| ALIGN (3) |
| L(oop): movl (%esi),%eax |
| adcl (%edx),%eax |
| movl %eax,(%edi) |
| movl 4(%esi),%eax |
| adcl 4(%edx),%eax |
| movl %eax,4(%edi) |
| movl 8(%esi),%eax |
| adcl 8(%edx),%eax |
| movl %eax,8(%edi) |
| movl 12(%esi),%eax |
| adcl 12(%edx),%eax |
| movl %eax,12(%edi) |
| movl 16(%esi),%eax |
| adcl 16(%edx),%eax |
| movl %eax,16(%edi) |
| movl 20(%esi),%eax |
| adcl 20(%edx),%eax |
| movl %eax,20(%edi) |
| movl 24(%esi),%eax |
| adcl 24(%edx),%eax |
| movl %eax,24(%edi) |
| movl 28(%esi),%eax |
| adcl 28(%edx),%eax |
| movl %eax,28(%edi) |
| leal 32(%edi),%edi |
| leal 32(%esi),%esi |
| leal 32(%edx),%edx |
| decl %ecx |
| jnz L(oop) |
| |
| sbbl %eax,%eax |
| negl %eax |
| |
| popl %esi |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (esi) |
| popl %edi |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (edi) |
| |
| LEAVE |
| ret |
| END (BP_SYM (__mpn_add_n)) |
