--- /dev/null
+dnl MIPS64 mpn_rshift -- Right shift.
+
+dnl Copyright 1995, 2000, 2001, 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_rshift)
+ ld $10,0($5) C load first limb
+ dsubu $13,$0,$7
+ daddiu $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
+ dsll $2,$10,$13 C compute function result
+
+ dsubu $6,$6,$9
+
+.Loop0: ld $3,8($5)
+ daddiu $4,$4,8
+ daddiu $5,$5,8
+ daddiu $9,$9,-1
+ dsrl $11,$10,$7
+ dsll $12,$3,$13
+ move $10,$3
+ or $8,$11,$12
+ bne $9,$0,.Loop0
+ sd $8,-8($4)
+
+.L0: beq $6,$0,.Lend
+ nop
+
+.Loop: ld $3,8($5)
+ daddiu $4,$4,32
+ daddiu $6,$6,-4
+ dsrl $11,$10,$7
+ dsll $12,$3,$13
+
+ ld $10,16($5)
+ dsrl $14,$3,$7
+ or $8,$11,$12
+ sd $8,-32($4)
+ dsll $9,$10,$13
+
+ ld $3,24($5)
+ dsrl $11,$10,$7
+ or $8,$14,$9
+ sd $8,-24($4)
+ dsll $12,$3,$13
+
+ ld $10,32($5)
+ dsrl $14,$3,$7
+ or $8,$11,$12
+ sd $8,-16($4)
+ dsll $9,$10,$13
+
+ daddiu $5,$5,32
+ or $8,$14,$9
+ bgtz $6,.Loop
+ sd $8,-8($4)
+
+.Lend: dsrl $8,$10,$7
+ j $31
+ sd $8,0($4)
+EPILOGUE(mpn_rshift)
projects / msp430-gcc.git / blobdiff