| 1 | ! Sparc __mpn_lshift -- |
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| 2 | ! |
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| 3 | ! Copyright (C) 1995-2024 Free Software Foundation, Inc. |
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| 4 | ! |
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| 5 | ! This file is part of the GNU MP Library. |
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| 6 | ! |
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| 7 | ! The GNU MP Library is free software; you can redistribute it and/or modify |
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| 8 | ! it under the terms of the GNU Lesser General Public License as published by |
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| 9 | ! the Free Software Foundation; either version 2.1 of the License, or (at your |
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| 10 | ! option) any later version. |
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| 11 | ! |
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| 12 | ! The GNU MP Library is distributed in the hope that it will be useful, but |
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| 13 | ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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| 14 | ! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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| 15 | ! License for more details. |
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| 16 | ! |
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| 17 | ! You should have received a copy of the GNU Lesser General Public License |
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| 18 | ! along with the GNU MP Library; see the file COPYING.LIB. If not, |
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| 19 | ! see <https://www.gnu.org/licenses/>. |
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| 20 | |
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| 21 | |
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| 22 | ! INPUT PARAMETERS |
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| 23 | ! RES_PTR %o0 |
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| 24 | ! SRC_PTR %o1 |
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| 25 | ! SIZE %o2 |
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| 26 | ! CNT %o3 |
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| 27 | |
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| 28 | #include <sysdep.h> |
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| 29 | |
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| 30 | ENTRY(__mpn_lshift) |
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| 31 | sll %o2,2,%g1 |
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| 32 | add %o1,%g1,%o1 ! make %o1 point at end of src |
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| 33 | ld [%o1-4],%g2 ! load first limb |
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| 34 | sub %g0,%o3,%o5 ! negate shift count |
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| 35 | add %o0,%g1,%o0 ! make %o0 point at end of res |
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| 36 | add %o2,-1,%o2 |
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| 37 | andcc %o2,4-1,%g4 ! number of limbs in first loop |
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| 38 | srl %g2,%o5,%g1 ! compute function result |
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| 39 | be LOC(0) ! if multiple of 4 limbs, skip first loop |
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| 40 | st %g1,[%sp+80] |
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| 41 | |
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| 42 | sub %o2,%g4,%o2 ! adjust count for main loop |
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| 43 | |
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| 44 | LOC(loop0): |
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| 45 | ld [%o1-8],%g3 |
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| 46 | add %o0,-4,%o0 |
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| 47 | add %o1,-4,%o1 |
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| 48 | addcc %g4,-1,%g4 |
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| 49 | sll %g2,%o3,%o4 |
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| 50 | srl %g3,%o5,%g1 |
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| 51 | mov %g3,%g2 |
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| 52 | or %o4,%g1,%o4 |
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| 53 | bne LOC(loop0) |
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| 54 | st %o4,[%o0+0] |
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| 55 | |
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| 56 | LOC(0): tst %o2 |
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| 57 | be LOC(end) |
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| 58 | nop |
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| 59 | |
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| 60 | LOC(loop): |
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| 61 | ld [%o1-8],%g3 |
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| 62 | add %o0,-16,%o0 |
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| 63 | addcc %o2,-4,%o2 |
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| 64 | sll %g2,%o3,%o4 |
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| 65 | srl %g3,%o5,%g1 |
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| 66 | |
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| 67 | ld [%o1-12],%g2 |
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| 68 | sll %g3,%o3,%g4 |
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| 69 | or %o4,%g1,%o4 |
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| 70 | st %o4,[%o0+12] |
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| 71 | srl %g2,%o5,%g1 |
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| 72 | |
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| 73 | ld [%o1-16],%g3 |
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| 74 | sll %g2,%o3,%o4 |
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| 75 | or %g4,%g1,%g4 |
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| 76 | st %g4,[%o0+8] |
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| 77 | srl %g3,%o5,%g1 |
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| 78 | |
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| 79 | ld [%o1-20],%g2 |
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| 80 | sll %g3,%o3,%g4 |
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| 81 | or %o4,%g1,%o4 |
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| 82 | st %o4,[%o0+4] |
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| 83 | srl %g2,%o5,%g1 |
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| 84 | |
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| 85 | add %o1,-16,%o1 |
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| 86 | or %g4,%g1,%g4 |
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| 87 | bne LOC(loop) |
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| 88 | st %g4,[%o0+0] |
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| 89 | |
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| 90 | LOC(end): |
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| 91 | sll %g2,%o3,%g2 |
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| 92 | st %g2,[%o0-4] |
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| 93 | retl |
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| 94 | ld [%sp+80],%o0 |
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| 95 | |
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| 96 | END(__mpn_lshift) |
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| 97 | |
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