| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 1 | dnl SPARC mpn_lshift -- Shift a number left. |
| 2 | |
| 3 | dnl Copyright 1995, 1996, 2000 Free Software Foundation, Inc. |
| 4 | |
| 5 | dnl This file is part of the GNU MP Library. |
| 6 | dnl |
| 7 | dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| 8 | dnl it under the terms of either: |
| 9 | dnl |
| 10 | dnl * the GNU Lesser General Public License as published by the Free |
| 11 | dnl Software Foundation; either version 3 of the License, or (at your |
| 12 | dnl option) any later version. |
| 13 | dnl |
| 14 | dnl or |
| 15 | dnl |
| 16 | dnl * the GNU General Public License as published by the Free Software |
| 17 | dnl Foundation; either version 2 of the License, or (at your option) any |
| 18 | dnl later version. |
| 19 | dnl |
| 20 | dnl or both in parallel, as here. |
| 21 | dnl |
| 22 | dnl The GNU MP Library is distributed in the hope that it will be useful, but |
| 23 | dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 24 | dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 25 | dnl for more details. |
| 26 | dnl |
| 27 | dnl You should have received copies of the GNU General Public License and the |
| 28 | dnl GNU Lesser General Public License along with the GNU MP Library. If not, |
| 29 | dnl see https://www.gnu.org/licenses/. |
| 30 | |
| 31 | |
| 32 | include(`../config.m4') |
| 33 | |
| 34 | C INPUT PARAMETERS |
| 35 | C res_ptr %o0 |
| 36 | C src_ptr %o1 |
| 37 | C size %o2 |
| 38 | C cnt %o3 |
| 39 | |
| 40 | ASM_START() |
| 41 | PROLOGUE(mpn_lshift) |
| 42 | sll %o2,2,%g1 |
| 43 | add %o1,%g1,%o1 C make %o1 point at end of src |
| 44 | ld [%o1-4],%g2 C load first limb |
| 45 | sub %g0,%o3,%o5 C negate shift count |
| 46 | add %o0,%g1,%o0 C make %o0 point at end of res |
| 47 | add %o2,-1,%o2 |
| 48 | andcc %o2,4-1,%g4 C number of limbs in first loop |
| 49 | srl %g2,%o5,%g1 C compute function result |
| 50 | be L(0) C if multiple of 4 limbs, skip first loop |
| 51 | st %g1,[%sp+80] |
| 52 | |
| 53 | sub %o2,%g4,%o2 C adjust count for main loop |
| 54 | |
| 55 | L(loop0): |
| 56 | ld [%o1-8],%g3 |
| 57 | add %o0,-4,%o0 |
| 58 | add %o1,-4,%o1 |
| 59 | addcc %g4,-1,%g4 |
| 60 | sll %g2,%o3,%o4 |
| 61 | srl %g3,%o5,%g1 |
| 62 | mov %g3,%g2 |
| 63 | or %o4,%g1,%o4 |
| 64 | bne L(loop0) |
| 65 | st %o4,[%o0+0] |
| 66 | |
| 67 | L(0): tst %o2 |
| 68 | be L(end) |
| 69 | nop |
| 70 | |
| 71 | L(loop): |
| 72 | ld [%o1-8],%g3 |
| 73 | add %o0,-16,%o0 |
| 74 | addcc %o2,-4,%o2 |
| 75 | sll %g2,%o3,%o4 |
| 76 | srl %g3,%o5,%g1 |
| 77 | |
| 78 | ld [%o1-12],%g2 |
| 79 | sll %g3,%o3,%g4 |
| 80 | or %o4,%g1,%o4 |
| 81 | st %o4,[%o0+12] |
| 82 | srl %g2,%o5,%g1 |
| 83 | |
| 84 | ld [%o1-16],%g3 |
| 85 | sll %g2,%o3,%o4 |
| 86 | or %g4,%g1,%g4 |
| 87 | st %g4,[%o0+8] |
| 88 | srl %g3,%o5,%g1 |
| 89 | |
| 90 | ld [%o1-20],%g2 |
| 91 | sll %g3,%o3,%g4 |
| 92 | or %o4,%g1,%o4 |
| 93 | st %o4,[%o0+4] |
| 94 | srl %g2,%o5,%g1 |
| 95 | |
| 96 | add %o1,-16,%o1 |
| 97 | or %g4,%g1,%g4 |
| 98 | bne L(loop) |
| 99 | st %g4,[%o0+0] |
| 100 | |
| 101 | L(end): sll %g2,%o3,%g2 |
| 102 | st %g2,[%o0-4] |
| 103 | retl |
| 104 | ld [%sp+80],%o0 |
| 105 | EPILOGUE(mpn_lshift) |