| 1 | ! SPARC v9 32-bit __mpn_mul_1 -- Multiply a limb vector with a single |
|---|
| 2 | ! limb and store the product in a second limb vector. |
|---|
| 3 | ! |
|---|
| 4 | ! Copyright (C) 2013-2024 Free Software Foundation, Inc. |
|---|
| 5 | ! This file is part of the GNU C Library. |
|---|
| 6 | ! |
|---|
| 7 | ! The GNU C Library is free software; you can redistribute it and/or |
|---|
| 8 | ! modify it under the terms of the GNU Lesser General Public |
|---|
| 9 | ! License as published by the Free Software Foundation; either |
|---|
| 10 | ! version 2.1 of the License, or (at your option) any later version. |
|---|
| 11 | ! |
|---|
| 12 | ! The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 13 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 14 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 15 | ! Lesser General Public License for more details. |
|---|
| 16 | ! |
|---|
| 17 | ! You should have received a copy of the GNU Lesser General Public |
|---|
| 18 | ! License along with the GNU C Library; if not, see |
|---|
| 19 | ! <https://www.gnu.org/licenses/>. |
|---|
| 20 | |
|---|
| 21 | #include <sysdep.h> |
|---|
| 22 | |
|---|
| 23 | #define res_ptr %o0 |
|---|
| 24 | #define s1_ptr %o1 |
|---|
| 25 | #define sz %o2 |
|---|
| 26 | #define s2_limb %o3 |
|---|
| 27 | #define carry %o5 |
|---|
| 28 | #define tmp1 %g1 |
|---|
| 29 | #define tmp2 %g2 |
|---|
| 30 | #define tmp3 %g3 |
|---|
| 31 | #define tmp4 %o4 |
|---|
| 32 | |
|---|
| 33 | ENTRY(__mpn_mul_1) |
|---|
| 34 | srl sz, 0, sz |
|---|
| 35 | srl s2_limb, 0, s2_limb |
|---|
| 36 | subcc sz, 1, sz |
|---|
| 37 | be,pn %icc, .Lfinal_limb |
|---|
| 38 | clr carry |
|---|
| 39 | |
|---|
| 40 | .Lloop: |
|---|
| 41 | lduw [s1_ptr + 0x00], tmp1 |
|---|
| 42 | lduw [s1_ptr + 0x04], tmp2 |
|---|
| 43 | mulx tmp1, s2_limb, tmp3 |
|---|
| 44 | add s1_ptr, 8, s1_ptr |
|---|
| 45 | mulx tmp2, s2_limb, tmp4 |
|---|
| 46 | sub sz, 2, sz |
|---|
| 47 | add res_ptr, 8, res_ptr |
|---|
| 48 | add carry, tmp3, tmp3 |
|---|
| 49 | stw tmp3, [res_ptr - 0x08] |
|---|
| 50 | srlx tmp3, 32, carry |
|---|
| 51 | add carry, tmp4, tmp4 |
|---|
| 52 | stw tmp4, [res_ptr - 0x04] |
|---|
| 53 | brgz sz, .Lloop |
|---|
| 54 | srlx tmp4, 32, carry |
|---|
| 55 | |
|---|
| 56 | brlz,pt sz, .Lfinish |
|---|
| 57 | nop |
|---|
| 58 | |
|---|
| 59 | .Lfinal_limb: |
|---|
| 60 | lduw [s1_ptr + 0x00], tmp1 |
|---|
| 61 | mulx tmp1, s2_limb, tmp3 |
|---|
| 62 | add carry, tmp3, tmp3 |
|---|
| 63 | stw tmp3, [res_ptr + 0x00] |
|---|
| 64 | srlx tmp3, 32, carry |
|---|
| 65 | |
|---|
| 66 | .Lfinish: |
|---|
| 67 | retl |
|---|
| 68 | mov carry, %o0 |
|---|
| 69 | END(__mpn_mul_1) |
|---|
| 70 | |
|---|
