git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a334319f UD |
1 | /* MIPS __mpn_addmul_1 -- Multiply a limb vector with a single limb and |
| 2 | add the product to a second limb vector. | |
| 3 | ||
| 4 | Copyright (C) 1995, 2000, 2002, 2003 Free Software Foundation, Inc. | |
| 5 | ||
| 6 | This file is part of the GNU MP Library. | |
| 7 | ||
| 8 | The GNU MP Library is free software; you can redistribute it and/or modify | |
| 9 | it under the terms of the GNU Lesser General Public License as published by | |
| 10 | the Free Software Foundation; either version 2.1 of the License, or (at your | |
| 11 | option) any later version. | |
| 12 | ||
| 13 | The GNU MP Library is distributed in the hope that it will be useful, but | |
| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
| 16 | License for more details. | |
| 17 | ||
| 18 | You should have received a copy of the GNU Lesser General Public License | |
| 19 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to | |
| 20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 21 | MA 02111-1307, USA. */ | |
| 22 | ||
| 23 | #include <sysdep.h> | |
| 24 | ||
| 25 | /* INPUT PARAMETERS | |
| 26 | res_ptr $4 | |
| 27 | s1_ptr $5 | |
| 28 | size $6 | |
| 29 | s2_limb $7 | |
| 30 | */ | |
| 31 | #ifdef __PIC__ | |
| 32 | .option pic2 | |
| 33 | #endif | |
| 34 | ENTRY (__mpn_addmul_1) | |
| 35 | .set noreorder | |
| 36 | #ifdef __PIC__ | |
| 37 | .cpload t9 | |
| 38 | #endif | |
| 39 | .set nomacro | |
| 40 | ||
| 41 | /* warm up phase 0 */ | |
| 42 | lw $8,0($5) | |
| 43 | ||
| 44 | /* warm up phase 1 */ | |
| 45 | addiu $5,$5,4 | |
| 46 | multu $8,$7 | |
| 47 | ||
| 48 | addiu $6,$6,-1 | |
| 49 | beq $6,$0,L(LC0) | |
| 50 | move $2,$0 /* zero cy2 */ | |
| 51 | ||
| 52 | addiu $6,$6,-1 | |
| 53 | beq $6,$0,L(LC1) | |
| 54 | lw $8,0($5) /* load new s1 limb as early as possible */ | |
| 55 | ||
| 56 | L(Loop): lw $10,0($4) | |
| 57 | mflo $3 | |
| 58 | mfhi $9 | |
| 59 | addiu $5,$5,4 | |
| 60 | addu $3,$3,$2 /* add old carry limb to low product limb */ | |
| 61 | multu $8,$7 | |
| 62 | lw $8,0($5) /* load new s1 limb as early as possible */ | |
| 63 | addiu $6,$6,-1 /* decrement loop counter */ | |
| 64 | sltu $2,$3,$2 /* carry from previous addition -> $2 */ | |
| 65 | addu $3,$10,$3 | |
| 66 | sltu $10,$3,$10 | |
| 67 | addu $2,$2,$10 | |
| 68 | sw $3,0($4) | |
| 69 | addiu $4,$4,4 | |
| 70 | bne $6,$0,L(Loop) /* should be "bnel" */ | |
| 71 | addu $2,$9,$2 /* add high product limb and carry from addition */ | |
| 72 | ||
| 73 | /* cool down phase 1 */ | |
| 74 | L(LC1): lw $10,0($4) | |
| 75 | mflo $3 | |
| 76 | mfhi $9 | |
| 77 | addu $3,$3,$2 | |
| 78 | sltu $2,$3,$2 | |
| 79 | multu $8,$7 | |
| 80 | addu $3,$10,$3 | |
| 81 | sltu $10,$3,$10 | |
| 82 | addu $2,$2,$10 | |
| 83 | sw $3,0($4) | |
| 84 | addiu $4,$4,4 | |
| 85 | addu $2,$9,$2 /* add high product limb and carry from addition */ | |
| 86 | ||
| 87 | /* cool down phase 0 */ | |
| 88 | L(LC0): lw $10,0($4) | |
| 89 | mflo $3 | |
| 90 | mfhi $9 | |
| 91 | addu $3,$3,$2 | |
| 92 | sltu $2,$3,$2 | |
| 93 | addu $3,$10,$3 | |
| 94 | sltu $10,$3,$10 | |
| 95 | addu $2,$2,$10 | |
| 96 | sw $3,0($4) | |
| 97 | j $31 | |
| 98 | addu $2,$9,$2 /* add high product limb and carry from addition */ | |
| 99 | END (__mpn_addmul_1) |