projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5ae3e846 UD |
1 | /* SPARC v9 __mpn_mul_1 -- Multiply a limb vector with a single limb and |
| 2 | store the product in a second limb vector. | |
| 6b628d36 | 3 | |
| f7a9f785 | 4 | Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| 6b628d36 | 5 | |
| 5ae3e846 | 6 | This file is part of the GNU MP Library. |
| 6b628d36 | 7 | |
| 5ae3e846 | 8 | The GNU MP Library is free software; you can redistribute it and/or modify |
| 6d84f89a AJ |
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 | |
| 5ae3e846 | 11 | option) any later version. |
| 6b628d36 | 12 | |
| 5ae3e846 UD |
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 | |
| 6d84f89a | 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 5ae3e846 | 16 | License for more details. |
| 6b628d36 | 17 | |
| 6d84f89a | 18 | You should have received a copy of the GNU Lesser General Public License |
| 59ba27a6 PE |
19 | along with the GNU MP Library; see the file COPYING.LIB. If not, |
| 20 | see <http://www.gnu.org/licenses/>. */ | |
| 6b628d36 | 21 | |
| 5ae3e846 | 22 | #include <sysdep.h> |
| 6b628d36 | 23 | |
| 6b628d36 | 24 | |
| 5ae3e846 UD |
25 | /* INPUT PARAMETERS |
| 26 | res_ptr o0 | |
| 27 | s1_ptr o1 | |
| 28 | size o2 | |
| 29 | s2_limb o3 */ | |
| 30 | ||
| 31 | ENTRY(__mpn_mul_1) | |
| 6b628d36 | 32 | !#PROLOGUE# 0 |
| 9c4c0024 | 33 | save %sp,-192,%sp |
| 6b628d36 | 34 | !#PROLOGUE# 1 |
| 5ae3e846 | 35 | |
| 6b628d36 RM |
36 | sub %g0,%i2,%o7 |
| 37 | sllx %o7,3,%g5 | |
| 38 | sub %i1,%g5,%o3 | |
| 39 | sub %i0,%g5,%o4 | |
| 40 | mov 0,%o0 ! zero cy_limb | |
| 41 | ||
| 42 | srl %i3,0,%o1 ! extract low 32 bits of s2_limb | |
| 43 | srlx %i3,32,%i3 ! extract high 32 bits of s2_limb | |
| 44 | mov 1,%o2 | |
| 45 | sllx %o2,32,%o2 ! o2 = 0x100000000 | |
| 46 | ||
| 47 | ! hi ! | |
| 48 | ! mid-1 ! | |
| 49 | ! mid-2 ! | |
| 50 | ! lo ! | |
| 51 | .Loop: | |
| 52 | sllx %o7,3,%g1 | |
| 53 | ldx [%o3+%g1],%g5 | |
| 54 | srl %g5,0,%i0 ! zero hi bits | |
| 55 | srlx %g5,32,%g5 | |
| 56 | mulx %o1,%i0,%i4 ! lo product | |
| 57 | mulx %i3,%i0,%i1 ! mid-1 product | |
| 58 | mulx %o1,%g5,%l2 ! mid-2 product | |
| 59 | mulx %i3,%g5,%i5 ! hi product | |
| 60 | srlx %i4,32,%i0 ! extract high 32 bits of lo product... | |
| 61 | add %i1,%i0,%i1 ! ...and add it to the mid-1 product | |
| 62 | addcc %i1,%l2,%i1 ! add mid products | |
| 63 | mov 0,%l0 ! we need the carry from that add... | |
| 64 | movcs %xcc,%o2,%l0 ! ...compute it and... | |
| 65 | add %i5,%l0,%i5 ! ...add to bit 32 of the hi product | |
| 66 | sllx %i1,32,%i0 ! align low bits of mid product | |
| 67 | srl %i4,0,%g5 ! zero high 32 bits of lo product | |
| 68 | add %i0,%g5,%i0 ! combine into low 64 bits of result | |
| 69 | srlx %i1,32,%i1 ! extract high bits of mid product... | |
| 70 | add %i5,%i1,%i1 ! ...and add them to the high result | |
| 71 | addcc %i0,%o0,%i0 ! add cy_limb to low 64 bits of result | |
| 72 | mov 0,%g5 | |
| 73 | movcs %xcc,1,%g5 | |
| 2e65ca2b | 74 | addcc %o7,1,%o7 |
| 6b628d36 | 75 | stx %i0,[%o4+%g1] |
| 2e65ca2b | 76 | bne,pt %xcc,.Loop |
| 5ae3e846 | 77 | add %i1,%g5,%o0 ! compute new cy_limb |
| 6b628d36 | 78 | |
| 5ae3e846 | 79 | jmpl %i7+8,%g0 |
| 2e65ca2b | 80 | restore %o0,%g0,%o0 |
| 5ae3e846 UD |
81 | |
| 82 | END(__mpn_mul_1) |