Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpn / mips2 / lshift.s

diff --git a/rts/gmp/mpn/mips2/lshift.s b/rts/gmp/mpn/mips2/lshift.s
new file mode 100644 (file)
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+++ b/rts/gmp/mpn/mips2/lshift.s
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+ # MIPS2 __gmpn_lshift --
+
+ # Copyright (C) 1995, 2000 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.
+
+
+ # INPUT PARAMETERS
+ # res_ptr     $4
+ # src_ptr     $5
+ # size                $6
+ # cnt         $7
+
+       .text
+       .align  2
+       .globl  __gmpn_lshift
+       .ent    __gmpn_lshift
+__gmpn_lshift:
+       .set    noreorder
+       .set    nomacro
+
+       sll     $2,$6,2
+       addu    $5,$5,$2        # make r5 point at end of src
+       lw      $10,-4($5)      # load first limb
+       subu    $13,$0,$7
+       addu    $4,$4,$2        # make r4 point at end of res
+       addiu   $6,$6,-1
+       and     $9,$6,4-1       # number of limbs in first loop
+       beq     $9,$0,.L0       # if multiple of 4 limbs, skip first loop
+        srl    $2,$10,$13      # 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)
+       .end    __gmpn_lshift