projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a0a462c | 1 | /* Multiply a limb vector by a single limb, for PowerPC. |
| f7a9f785 | 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 4cca6b86 UD |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 4cca6b86 UD |
9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 4cca6b86 | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 4cca6b86 UD |
18 | |
| 19 | #include <sysdep.h> | |
| 9a0a462c UD |
20 | |
| 21 | /* mp_limb_t mpn_submul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr, | |
| 22 | mp_size_t s1_size, mp_limb_t s2_limb) | |
| 23 | Calculate res-s1*s2 and put result back in res; return carry. */ | |
| 24 | ||
| b5510883 | 25 | ENTRY (__mpn_submul_1) |
| 217eb19b UD |
26 | mtctr r5 |
| 27 | ||
| 28 | lwz r0,0(r4) | |
| 29 | mullw r7,r0,r6 | |
| 30 | mulhwu r10,r0,r6 | |
| 31 | lwz r9,0(r3) | |
| 32 | subf r8,r7,r9 | |
| 33 | addc r7,r7,r8 # invert cy (r7 is junk) | |
| 34 | addi r3,r3,-4 # adjust res_ptr | |
| 4e141d64 | 35 | bdz L(1) |
| 9a0a462c | 36 | |
| 4e141d64 | 37 | L(0): lwzu r0,4(r4) |
| 217eb19b UD |
38 | stwu r8,4(r3) |
| 39 | mullw r8,r0,r6 | |
| 40 | adde r7,r8,r10 | |
| 41 | mulhwu r10,r0,r6 | |
| 42 | lwz r9,4(r3) | |
| 43 | addze r10,r10 | |
| 44 | subf r8,r7,r9 | |
| 45 | addc r7,r7,r8 # invert cy (r7 is junk) | |
| 4e141d64 | 46 | bdnz L(0) |
| 9a0a462c | 47 | |
| 4e141d64 | 48 | L(1): stw r8,4(r3) |
| 217eb19b | 49 | addze r3,r10 |
| 9a0a462c | 50 | blr |
| b5510883 | 51 | END (__mpn_submul_1) |