projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 32fcb36d DM |
1 | ! SPARC v9 64-bit VIS3 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 |
| 2 | ! and store difference in a third limb vector. | |
| 3 | ! | |
| 04277e02 | 4 | ! Copyright (C) 2013-2019 Free Software Foundation, Inc. |
| 32fcb36d DM |
5 | ! This file is part of the GNU C Library. |
| 6 | ! Contributed by David S. Miller <davem@davemloft.net> | |
| 7 | ! | |
| 8 | ! The GNU C Library is free software; you can redistribute it and/or | |
| 9 | ! modify it under the terms of the GNU Lesser General Public | |
| 10 | ! License as published by the Free Software Foundation; either | |
| 11 | ! version 2.1 of the License, or (at your option) any later version. | |
| 12 | ! | |
| 13 | ! The GNU C Library is distributed in the hope that it will be useful, | |
| 14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | ! Lesser General Public License for more details. | |
| 17 | ! | |
| 18 | ! You should have received a copy of the GNU Lesser General Public | |
| 19 | ! License along with the GNU C Library; if not, see | |
| 20 | ! <http://www.gnu.org/licenses/>. | |
| 21 | ||
| 22 | #include <sysdep.h> | |
| 23 | ||
| 24 | #define res_ptr %o0 | |
| 25 | #define s1_ptr %o1 | |
| 26 | #define s2_ptr %o2 | |
| 27 | #define sz %o3 | |
| 28 | #define tmp1 %g1 | |
| 29 | #define tmp2 %g2 | |
| 30 | #define tmp3 %g3 | |
| 31 | #define tmp4 %o4 | |
| 32 | ||
| 33 | .register %g2,#scratch | |
| 34 | .register %g3,#scratch | |
| 35 | ENTRY(__mpn_sub_n_vis3) | |
| 36 | subcc sz, 1, sz | |
| 37 | be .Lfinal_limb | |
| 38 | cmp %g0, 1 | |
| 39 | ||
| 40 | .Lloop: | |
| 41 | ldx [s2_ptr + 0x00], tmp1 | |
| 42 | add s2_ptr, 0x10, s2_ptr | |
| 43 | ldx [s1_ptr + 0x00], tmp2 | |
| 44 | add s1_ptr, 0x10, s1_ptr | |
| 45 | ldx [s2_ptr - 0x08], tmp3 | |
| 46 | add res_ptr, 0x10, res_ptr | |
| 47 | ldx [s1_ptr - 0x08], tmp4 | |
| 48 | sub sz, 2, sz | |
| 49 | xnor tmp1, %g0, tmp1 | |
| 50 | addxccc tmp1, tmp2, tmp1 | |
| 51 | stx tmp1, [res_ptr - 0x10] | |
| 52 | xnor tmp3, %g0, tmp3 | |
| 53 | addxccc tmp3, tmp4, tmp3 | |
| 54 | brgz sz, .Lloop | |
| 55 | stx tmp3, [res_ptr - 0x08] | |
| 56 | ||
| 57 | brlz,pt sz, .Lfinish | |
| 58 | nop | |
| 59 | ||
| 60 | .Lfinal_limb: | |
| 61 | ldx [s2_ptr + 0x00], tmp1 | |
| 62 | ldx [s1_ptr + 0x00], tmp2 | |
| 63 | xnor tmp1, %g0, tmp1 | |
| 64 | addxccc tmp1, tmp2, tmp1 | |
| 65 | stx tmp1, [res_ptr + 0x00] | |
| 66 | ||
| 67 | .Lfinish: | |
| 68 | clr %o0 | |
| 69 | retl | |
| 70 | movcc %xcc, 1, %o0 | |
| 71 | END(__mpn_sub_n_vis3) |