Imported gcc-4.4.3

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

diff --git a/gmp/mpn/mips32/lshift.asm b/gmp/mpn/mips32/lshift.asm
new file mode 100644 (file)
index 0000000..8a27951
--- /dev/null
+++ b/gmp/mpn/mips32/lshift.asm
@@ -0,0 +1,88 @@
+dnl  MIPS32 mpn_lshift -- Left shift.
+
+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 src_ptr      $5
+C size         $6
+C cnt          $7
+
+ASM_START()
+PROLOGUE(mpn_lshift)
+       sll     $2,$6,2
+       addu    $5,$5,$2        C make r5 point at end of src
+       lw      $10,-4($5)      C load first limb
+       subu    $13,$0,$7
+       addu    $4,$4,$2        C make r4 point at end of res
+       addiu   $6,$6,-1
+       and     $9,$6,4-1       C number of limbs in first loop
+       beq     $9,$0,.L0       C if multiple of 4 limbs, skip first loop
+        srl    $2,$10,$13      C compute function result
+
+       subu    $6,$6,$9
+
+.Loop0:        lw      $3,-8($5)
+       addiu   $4,$4,-4
+       addiu   $5,$5,-4
+       addiu   $9,$9,-1
+       sll     $11,$10,$7
+       srl     $12,$3,$13
+       move    $10,$3
+       or      $8,$11,$12
+       bne     $9,$0,.Loop0
+        sw     $8,0($4)
+
+.L0:   beq     $6,$0,.Lend
+        nop
+
+.Loop: lw      $3,-8($5)
+       addiu   $4,$4,-16
+       addiu   $6,$6,-4
+       sll     $11,$10,$7
+       srl     $12,$3,$13
+
+       lw      $10,-12($5)
+       sll     $14,$3,$7
+       or      $8,$11,$12
+       sw      $8,12($4)
+       srl     $9,$10,$13
+
+       lw      $3,-16($5)
+       sll     $11,$10,$7
+       or      $8,$14,$9
+       sw      $8,8($4)
+       srl     $12,$3,$13
+
+       lw      $10,-20($5)
+       sll     $14,$3,$7
+       or      $8,$11,$12
+       sw      $8,4($4)
+       srl     $9,$10,$13
+
+       addiu   $5,$5,-16
+       or      $8,$14,$9
+       bgtz    $6,.Loop
+        sw     $8,0($4)
+
+.Lend: sll     $8,$10,$7
+       j       $31
+       sw      $8,-4($4)
+EPILOGUE(mpn_lshift)