Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpn / mips32 / sub_n.asm

diff --git a/gmp/mpn/mips32/sub_n.asm b/gmp/mpn/mips32/sub_n.asm
new file mode 100644 (file)
index 0000000..ed41271
--- /dev/null
+++ b/gmp/mpn/mips32/sub_n.asm
@@ -0,0 +1,112 @@
+dnl  MIPS32 mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+dnl  store difference in a third limb vector.
+
+dnl  Copyright 1995, 2000, 2002 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of the GNU Lesser General Public License as published
+dnl  by the Free Software Foundation; either version 3 of the License, or (at
+dnl  your option) any later version.
+
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+dnl  License for more details.
+
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C INPUT PARAMETERS
+C res_ptr      $4
+C s1_ptr       $5
+C s2_ptr       $6
+C size         $7
+
+ASM_START()
+PROLOGUE(mpn_sub_n)
+       lw      $10,0($5)
+       lw      $11,0($6)
+
+       addiu   $7,$7,-1
+       and     $9,$7,4-1       C number of limbs in first loop
+       beq     $9,$0,.L0       C if multiple of 4 limbs, skip first loop
+        move   $2,$0
+
+       subu    $7,$7,$9
+
+.Loop0:        addiu   $9,$9,-1
+       lw      $12,4($5)
+       addu    $11,$11,$2
+       lw      $13,4($6)
+       sltu    $8,$11,$2
+       subu    $11,$10,$11
+       sltu    $2,$10,$11
+       sw      $11,0($4)
+       or      $2,$2,$8
+
+       addiu   $5,$5,4
+       addiu   $6,$6,4
+       move    $10,$12
+       move    $11,$13
+       bne     $9,$0,.Loop0
+        addiu  $4,$4,4
+
+.L0:   beq     $7,$0,.Lend
+        nop
+
+.Loop: addiu   $7,$7,-4
+
+       lw      $12,4($5)
+       addu    $11,$11,$2
+       lw      $13,4($6)
+       sltu    $8,$11,$2
+       subu    $11,$10,$11
+       sltu    $2,$10,$11
+       sw      $11,0($4)
+       or      $2,$2,$8
+
+       lw      $10,8($5)
+       addu    $13,$13,$2
+       lw      $11,8($6)
+       sltu    $8,$13,$2
+       subu    $13,$12,$13
+       sltu    $2,$12,$13
+       sw      $13,4($4)
+       or      $2,$2,$8
+
+       lw      $12,12($5)
+       addu    $11,$11,$2
+       lw      $13,12($6)
+       sltu    $8,$11,$2
+       subu    $11,$10,$11
+       sltu    $2,$10,$11
+       sw      $11,8($4)
+       or      $2,$2,$8
+
+       lw      $10,16($5)
+       addu    $13,$13,$2
+       lw      $11,16($6)
+       sltu    $8,$13,$2
+       subu    $13,$12,$13
+       sltu    $2,$12,$13
+       sw      $13,12($4)
+       or      $2,$2,$8
+
+       addiu   $5,$5,16
+       addiu   $6,$6,16
+
+       bne     $7,$0,.Loop
+        addiu  $4,$4,16
+
+.Lend: addu    $11,$11,$2
+       sltu    $8,$11,$2
+       subu    $11,$10,$11
+       sltu    $2,$10,$11
+       sw      $11,0($4)
+       j       $31
+       or      $2,$2,$8
+EPILOGUE(mpn_sub_n)