| 1 | ! SPARC v8 __mpn_submul_1 -- Multiply a limb vector with a limb and |
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| 2 | ! subtract the result from a second limb vector. |
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| 3 | |
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| 4 | ! Copyright (C) 1992-2024 Free Software Foundation, Inc. |
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| 5 | |
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| 6 | ! This file is part of the GNU MP Library. |
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| 7 | |
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| 8 | ! The GNU MP Library is free software; you can redistribute it and/or modify |
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| 9 | ! it under the terms of the GNU Lesser General Public License as published by |
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| 10 | ! the Free Software Foundation; either version 2.1 of the License, or (at your |
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| 11 | ! option) any later version. |
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| 12 | |
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| 13 | ! The GNU MP Library is distributed in the hope that it will be useful, but |
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| 14 | ! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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| 15 | ! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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| 16 | ! License for more details. |
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| 17 | |
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| 18 | ! You should have received a copy of the GNU Lesser General Public License |
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| 19 | ! along with the GNU MP Library; see the file COPYING.LIB. If not, |
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| 20 | ! see <https://www.gnu.org/licenses/>. |
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| 21 | |
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| 22 | |
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| 23 | ! INPUT PARAMETERS |
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| 24 | ! res_ptr o0 |
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| 25 | ! s1_ptr o1 |
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| 26 | ! size o2 |
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| 27 | ! s2_limb o3 |
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| 28 | |
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| 29 | #include <sysdep.h> |
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| 30 | |
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| 31 | ENTRY(__mpn_submul_1) |
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| 32 | sub %g0,%o2,%o2 ! negate ... |
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| 33 | sll %o2,2,%o2 ! ... and scale size |
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| 34 | sub %o1,%o2,%o1 ! o1 is offset s1_ptr |
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| 35 | sub %o0,%o2,%g1 ! g1 is offset res_ptr |
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| 36 | |
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| 37 | mov 0,%o0 ! clear cy_limb |
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| 38 | |
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| 39 | LOC(loop): |
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| 40 | ld [%o1+%o2],%o4 |
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| 41 | ld [%g1+%o2],%g2 |
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| 42 | umul %o4,%o3,%o5 |
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| 43 | rd %y,%g3 |
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| 44 | addcc %o5,%o0,%o5 |
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| 45 | addx %g3,0,%o0 |
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| 46 | subcc %g2,%o5,%g2 |
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| 47 | addx %o0,0,%o0 |
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| 48 | st %g2,[%g1+%o2] |
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| 49 | |
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| 50 | addcc %o2,4,%o2 |
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| 51 | bne LOC(loop) |
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| 52 | nop |
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| 53 | |
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| 54 | retl |
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| 55 | nop |
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| 56 | |
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| 57 | END(__mpn_submul_1) |
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| 58 | |
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