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| Commit | Line | Data |
|---|---|---|
| dd552284 | 1 | /* 64-bit multiplication support for TILEPro. |
| 7adcbafe | 2 | Copyright (C) 2011-2022 Free Software Foundation, Inc. |
| dd552284 WL |
3 | Contributed by Walter Lee (walt@tilera.com) |
| 4 | ||
| 5 | This file is free software; you can redistribute it and/or modify it | |
| 6 | under the terms of the GNU General Public License as published by the | |
| 7 | Free Software Foundation; either version 3, or (at your option) any | |
| 8 | later version. | |
| 9 | ||
| 10 | This file is distributed in the hope that it will be useful, but | |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | General Public License for more details. | |
| 14 | ||
| 15 | Under Section 7 of GPL version 3, you are granted additional | |
| 16 | permissions described in the GCC Runtime Library Exception, version | |
| 17 | 3.1, as published by the Free Software Foundation. | |
| 18 | ||
| 19 | You should have received a copy of the GNU General Public License and | |
| 20 | a copy of the GCC Runtime Library Exception along with this program; | |
| 21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 22 | <http://www.gnu.org/licenses/>. */ | |
| 23 | ||
| 24 | /* 64-bit multiplication support. */ | |
| 25 | ||
| 26 | .file "softmpy.S" | |
| 27 | ||
| 28 | /* Parameters */ | |
| 29 | #define lo0 r9 /* low 32 bits of n0 */ | |
| 30 | #define hi0 r1 /* high 32 bits of n0 */ | |
| 31 | #define lo1 r2 /* low 32 bits of n1 */ | |
| 32 | #define hi1 r3 /* high 32 bits of n1 */ | |
| 33 | ||
| 34 | /* temps */ | |
| 35 | #define result1_a r4 | |
| 36 | #define result1_b r5 | |
| 37 | ||
| 38 | #define tmp0 r6 | |
| 39 | #define tmp0_left_16 r7 | |
| 40 | #define tmp1 r8 | |
| 41 | ||
| 42 | .section .text.__muldi3, "ax" | |
| 43 | .align 8 | |
| 44 | .globl __muldi3 | |
| 45 | .type __muldi3, @function | |
| 46 | __muldi3: | |
| 47 | { | |
| 48 | move lo0, r0 /* so we can write "out r0" while "in r0" alive */ | |
| 49 | mulhl_uu tmp0, lo1, r0 | |
| 50 | } | |
| 51 | { | |
| 52 | mulll_uu result1_a, lo1, hi0 | |
| 53 | } | |
| 54 | { | |
| 55 | move tmp1, tmp0 | |
| 56 | mulhla_uu tmp0, lo0, lo1 | |
| 57 | } | |
| 58 | { | |
| 59 | mulhlsa_uu result1_a, lo1, hi0 | |
| 60 | } | |
| 61 | { | |
| 62 | mulll_uu result1_b, lo0, hi1 | |
| 63 | slt_u tmp1, tmp0, tmp1 | |
| 64 | } | |
| 65 | { | |
| 66 | mulhlsa_uu result1_a, lo0, hi1 | |
| 67 | shli r0, tmp0, 16 | |
| 68 | } | |
| 69 | { | |
| 70 | move tmp0_left_16, r0 | |
| 71 | mulhha_uu result1_b, lo0, lo1 | |
| 72 | } | |
| 73 | { | |
| 74 | mullla_uu r0, lo1, lo0 | |
| 75 | shli tmp1, tmp1, 16 | |
| 76 | } | |
| 77 | { | |
| 78 | mulhlsa_uu result1_b, hi0, lo1 | |
| 79 | inthh tmp1, tmp1, tmp0 | |
| 80 | } | |
| 81 | { | |
| 82 | mulhlsa_uu result1_a, hi1, lo0 | |
| 83 | slt_u tmp0, r0, tmp0_left_16 | |
| 84 | } | |
| 85 | /* NOTE: this will stall for a cycle here. Oh well. */ | |
| 86 | { | |
| 87 | add r1, tmp0, tmp1 | |
| 88 | add result1_a, result1_a, result1_b | |
| 89 | } | |
| 90 | { | |
| 91 | add r1, r1, result1_a | |
| 92 | jrp lr | |
| 93 | } | |
| 94 | .size __muldi3,.-__muldi3 |