git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a334319f UD |
1 | /* MIPS3 __mpn_mul_1 -- Multiply a limb vector with a single limb and |
| 2 | * store the product in a second limb vector. | |
| 3 | * | |
| 4 | * Copyright (C) 1992, 1994, 1995, 2000, 2002, 2003 | |
| 5 | * Free Software Foundation, Inc. | |
| 6 | * | |
| 7 | * This file is part of the GNU MP Library. | |
| 8 | * | |
| 9 | * The GNU MP Library is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU Lesser General Public License as published by | |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or (at your | |
| 12 | * option) any later version. | |
| 13 | * | |
| 14 | * The GNU MP Library is distributed in the hope that it will be useful, but | |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
| 17 | * License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public License | |
| 20 | * along with the GNU MP Library; see the file COPYING.LIB. If not, write to | |
| 21 | * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 22 | * MA 02111-1307, USA. | |
| 23 | */ | |
| 24 | ||
| 25 | #include <sysdep.h> | |
| 26 | #include <sys/asm.h> | |
| 27 | ||
| 28 | /* INPUT PARAMETERS | |
| 29 | * res_ptr $4 | |
| 30 | * s1_ptr $5 | |
| 31 | * size $6 | |
| 32 | * s2_limb $7 | |
| 33 | */ | |
| 34 | ||
| 35 | #ifdef __PIC__ | |
| 36 | .option pic2 | |
| 37 | #endif | |
| 38 | .text | |
| 39 | .align 4 | |
| 40 | .globl __mpn_mul_1 | |
| 41 | .ent __mpn_mul_1 | |
| 42 | __mpn_mul_1: | |
| 43 | #ifdef __PIC__ | |
| 44 | SETUP_GP /* ??? unused */ | |
| 45 | #endif | |
| 46 | .set noreorder | |
| 47 | .set nomacro | |
| 48 | ||
| 49 | # warm up phase 0 | |
| 50 | ld $8,0($5) | |
| 51 | ||
| 52 | # warm up phase 1 | |
| 53 | daddiu $5,$5,8 | |
| 54 | dmultu $8,$7 | |
| 55 | ||
| 56 | daddiu $6,$6,-1 | |
| 57 | beq $6,$0,L(LC0) | |
| 58 | move $2,$0 # zero cy2 | |
| 59 | ||
| 60 | daddiu $6,$6,-1 | |
| 61 | beq $6,$0,L(LC1) | |
| 62 | ld $8,0($5) # load new s1 limb as early as possible | |
| 63 | ||
| 64 | L(Loop): mflo $10 | |
| 65 | mfhi $9 | |
| 66 | daddiu $5,$5,8 | |
| 67 | daddu $10,$10,$2 # add old carry limb to low product limb | |
| 68 | dmultu $8,$7 | |
| 69 | ld $8,0($5) # load new s1 limb as early as possible | |
| 70 | daddiu $6,$6,-1 # decrement loop counter | |
| 71 | sltu $2,$10,$2 # carry from previous addition -> $2 | |
| 72 | sd $10,0($4) | |
| 73 | daddiu $4,$4,8 | |
| 74 | bne $6,$0,L(Loop) | |
| 75 | daddu $2,$9,$2 # add high product limb and carry from addition | |
| 76 | ||
| 77 | # cool down phase 1 | |
| 78 | L(LC1): mflo $10 | |
| 79 | mfhi $9 | |
| 80 | daddu $10,$10,$2 | |
| 81 | sltu $2,$10,$2 | |
| 82 | dmultu $8,$7 | |
| 83 | sd $10,0($4) | |
| 84 | daddiu $4,$4,8 | |
| 85 | daddu $2,$9,$2 # add high product limb and carry from addition | |
| 86 | ||
| 87 | # cool down phase 0 | |
| 88 | L(LC0): mflo $10 | |
| 89 | mfhi $9 | |
| 90 | daddu $10,$10,$2 | |
| 91 | sltu $2,$10,$2 | |
| 92 | sd $10,0($4) | |
| 93 | j $31 | |
| 94 | daddu $2,$9,$2 # add high product limb and carry from addition | |
| 95 | ||
| 96 | .end __mpn_mul_1 |