1dnl MIPS32 mpn_lshift -- Left shift. 2 3dnl Copyright 1995, 2000, 2002 Free Software Foundation, Inc. 4 5dnl This file is part of the GNU MP Library. 6 7dnl The GNU MP Library is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU Lesser General Public License as published 9dnl by the Free Software Foundation; either version 3 of the License, or (at 10dnl your option) any later version. 11 12dnl The GNU MP Library is distributed in the hope that it will be useful, but 13dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15dnl License for more details. 16 17dnl You should have received a copy of the GNU Lesser General Public License 18dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 19 20include(`../config.m4') 21 22C INPUT PARAMETERS 23C res_ptr $4 24C src_ptr $5 25C size $6 26C cnt $7 27 28ASM_START() 29PROLOGUE(mpn_lshift) 30 sll $2,$6,2 31 addu $5,$5,$2 C make r5 point at end of src 32 lw $10,-4($5) C load first limb 33 subu $13,$0,$7 34 addu $4,$4,$2 C make r4 point at end of res 35 addiu $6,$6,-1 36 and $9,$6,4-1 C number of limbs in first loop 37 beq $9,$0,.L0 C if multiple of 4 limbs, skip first loop 38 srl $2,$10,$13 C compute function result 39 40 subu $6,$6,$9 41 42.Loop0: lw $3,-8($5) 43 addiu $4,$4,-4 44 addiu $5,$5,-4 45 addiu $9,$9,-1 46 sll $11,$10,$7 47 srl $12,$3,$13 48 move $10,$3 49 or $8,$11,$12 50 bne $9,$0,.Loop0 51 sw $8,0($4) 52 53.L0: beq $6,$0,.Lend 54 nop 55 56.Loop: lw $3,-8($5) 57 addiu $4,$4,-16 58 addiu $6,$6,-4 59 sll $11,$10,$7 60 srl $12,$3,$13 61 62 lw $10,-12($5) 63 sll $14,$3,$7 64 or $8,$11,$12 65 sw $8,12($4) 66 srl $9,$10,$13 67 68 lw $3,-16($5) 69 sll $11,$10,$7 70 or $8,$14,$9 71 sw $8,8($4) 72 srl $12,$3,$13 73 74 lw $10,-20($5) 75 sll $14,$3,$7 76 or $8,$11,$12 77 sw $8,4($4) 78 srl $9,$10,$13 79 80 addiu $5,$5,-16 81 or $8,$14,$9 82 bgtz $6,.Loop 83 sw $8,0($4) 84 85.Lend: sll $8,$10,$7 86 j $31 87 sw $8,-4($4) 88EPILOGUE(mpn_lshift) 89