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| 1 dnl SPARC mpn_rshift -- Shift a number right. | |
| 2 | |
| 3 dnl Copyright 1995, 1996, 2000 Free Software Foundation, Inc. | |
| 4 | |
| 5 dnl This file is part of the GNU MP Library. | |
| 6 | |
| 7 dnl The GNU MP Library is free software; you can redistribute it and/or modify | |
| 8 dnl it under the terms of the GNU Lesser General Public License as published | |
| 9 dnl by the Free Software Foundation; either version 3 of the License, or (at | |
| 10 dnl your option) any later version. | |
| 11 | |
| 12 dnl The GNU MP Library is distributed in the hope that it will be useful, but | |
| 13 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 14 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
| 15 dnl License for more details. | |
| 16 | |
| 17 dnl You should have received a copy of the GNU Lesser General Public License | |
| 18 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. | |
| 19 | |
| 20 | |
| 21 include(`../config.m4') | |
| 22 | |
| 23 C INPUT PARAMETERS | |
| 24 C res_ptr %o0 | |
| 25 C src_ptr %o1 | |
| 26 C size %o2 | |
| 27 C cnt %o3 | |
| 28 | |
| 29 ASM_START() | |
| 30 PROLOGUE(mpn_rshift) | |
| 31 ld [%o1],%g2 C load first limb | |
| 32 sub %g0,%o3,%o5 C negate shift count | |
| 33 add %o2,-1,%o2 | |
| 34 andcc %o2,4-1,%g4 C number of limbs in first loop | |
| 35 sll %g2,%o5,%g1 C compute function result | |
| 36 be L(0) C if multiple of 4 limbs, skip first loop | |
| 37 st %g1,[%sp+80] | |
| 38 | |
| 39 sub %o2,%g4,%o2 C adjust count for main loop | |
| 40 | |
| 41 L(loop0): | |
| 42 ld [%o1+4],%g3 | |
| 43 add %o0,4,%o0 | |
| 44 add %o1,4,%o1 | |
| 45 addcc %g4,-1,%g4 | |
| 46 srl %g2,%o3,%o4 | |
| 47 sll %g3,%o5,%g1 | |
| 48 mov %g3,%g2 | |
| 49 or %o4,%g1,%o4 | |
| 50 bne L(loop0) | |
| 51 st %o4,[%o0-4] | |
| 52 | |
| 53 L(0): tst %o2 | |
| 54 be L(end) | |
| 55 nop | |
| 56 | |
| 57 L(loop): | |
| 58 ld [%o1+4],%g3 | |
| 59 add %o0,16,%o0 | |
| 60 addcc %o2,-4,%o2 | |
| 61 srl %g2,%o3,%o4 | |
| 62 sll %g3,%o5,%g1 | |
| 63 | |
| 64 ld [%o1+8],%g2 | |
| 65 srl %g3,%o3,%g4 | |
| 66 or %o4,%g1,%o4 | |
| 67 st %o4,[%o0-16] | |
| 68 sll %g2,%o5,%g1 | |
| 69 | |
| 70 ld [%o1+12],%g3 | |
| 71 srl %g2,%o3,%o4 | |
| 72 or %g4,%g1,%g4 | |
| 73 st %g4,[%o0-12] | |
| 74 sll %g3,%o5,%g1 | |
| 75 | |
| 76 ld [%o1+16],%g2 | |
| 77 srl %g3,%o3,%g4 | |
| 78 or %o4,%g1,%o4 | |
| 79 st %o4,[%o0-8] | |
| 80 sll %g2,%o5,%g1 | |
| 81 | |
| 82 add %o1,16,%o1 | |
| 83 or %g4,%g1,%g4 | |
| 84 bne L(loop) | |
| 85 st %g4,[%o0-4] | |
| 86 | |
| 87 L(end): srl %g2,%o3,%g2 | |
| 88 st %g2,[%o0-0] | |
| 89 retl | |
| 90 ld [%sp+80],%o0 | |
| 91 EPILOGUE(mpn_rshift) | |
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Chromium Code Reviews
Issue 3050029:
[gcc] GCC 4.5.0=>4.5.1 (Closed)
Base URL: ssh://git@gitrw.chromium.org:9222/nacl-toolchain.git