| dnl ARM mpn_cnd_add_n, mpn_cnd_sub_n |
| |
| dnl Copyright 2012, 2013 Free Software Foundation, Inc. |
| |
| dnl This file is part of the GNU MP Library. |
| dnl |
| dnl The GNU MP Library is free software; you can redistribute it and/or modify |
| dnl it under the terms of either: |
| dnl |
| dnl * the GNU Lesser General Public License as published by the Free |
| dnl Software Foundation; either version 3 of the License, or (at your |
| dnl option) any later version. |
| dnl |
| dnl or |
| dnl |
| dnl * the GNU General Public License as published by the Free Software |
| dnl Foundation; either version 2 of the License, or (at your option) any |
| dnl later version. |
| dnl |
| dnl or both in parallel, as here. |
| dnl |
| dnl The GNU MP Library is distributed in the hope that it will be useful, but |
| dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| dnl for more details. |
| dnl |
| dnl You should have received copies of the GNU General Public License and the |
| dnl GNU Lesser General Public License along with the GNU MP Library. If not, |
| dnl see https://www.gnu.org/licenses/. |
| |
| include(`config.m4') |
| |
| C cycles/limb |
| C StrongARM ? |
| C XScale ? |
| C Cortex-A7 ? |
| C Cortex-A8 ? |
| C Cortex-A9 3 |
| C Cortex-A15 2.5 |
| |
| define(`cnd', `r0') |
| define(`rp', `r1') |
| define(`up', `r2') |
| define(`vp', `r3') |
| |
| define(`n', `r12') |
| |
| |
| ifdef(`OPERATION_cnd_add_n', ` |
| define(`ADDSUB', adds) |
| define(`ADDSUBC', adcs) |
| define(`INITCY', `cmn r0, #0') |
| define(`RETVAL', `adc r0, n, #0') |
| define(func, mpn_cnd_add_n)') |
| ifdef(`OPERATION_cnd_sub_n', ` |
| define(`ADDSUB', subs) |
| define(`ADDSUBC', sbcs) |
| define(`INITCY', `cmp r0, #0') |
| define(`RETVAL', `adc r0, n, #0 |
| rsb r0, r0, #1') |
| define(func, mpn_cnd_sub_n)') |
| |
| MULFUNC_PROLOGUE(mpn_cnd_add_n mpn_cnd_sub_n) |
| |
| ASM_START() |
| PROLOGUE(func) |
| push {r4-r11} |
| ldr n, [sp, #32] |
| |
| cmp cnd, #1 |
| sbc cnd, cnd, cnd C conditionally set to 0xffffffff |
| |
| INITCY C really only needed for n = 0 (mod 4) |
| |
| ands r4, n, #3 |
| beq L(top) |
| cmp r4, #2 |
| bcc L(b1) |
| beq L(b2) |
| |
| L(b3): ldm vp!, {r4,r5,r6} |
| ldm up!, {r8,r9,r10} |
| bic r4, r4, cnd |
| bic r5, r5, cnd |
| bic r6, r6, cnd |
| ADDSUB r8, r8, r4 |
| ADDSUBC r9, r9, r5 |
| ADDSUBC r10, r10, r6 |
| stm rp!, {r8,r9,r10} |
| sub n, n, #3 |
| teq n, #0 |
| bne L(top) |
| b L(end) |
| |
| L(b2): ldm vp!, {r4,r5} |
| ldm up!, {r8,r9} |
| bic r4, r4, cnd |
| bic r5, r5, cnd |
| ADDSUB r8, r8, r4 |
| ADDSUBC r9, r9, r5 |
| stm rp!, {r8,r9} |
| sub n, n, #2 |
| teq n, #0 |
| bne L(top) |
| b L(end) |
| |
| L(b1): ldr r4, [vp], #4 |
| ldr r8, [up], #4 |
| bic r4, r4, cnd |
| ADDSUB r8, r8, r4 |
| str r8, [rp], #4 |
| sub n, n, #1 |
| teq n, #0 |
| beq L(end) |
| |
| L(top): ldm vp!, {r4,r5,r6,r7} |
| ldm up!, {r8,r9,r10,r11} |
| bic r4, r4, cnd |
| bic r5, r5, cnd |
| bic r6, r6, cnd |
| bic r7, r7, cnd |
| ADDSUBC r8, r8, r4 |
| ADDSUBC r9, r9, r5 |
| ADDSUBC r10, r10, r6 |
| ADDSUBC r11, r11, r7 |
| sub n, n, #4 |
| stm rp!, {r8,r9,r10,r11} |
| teq n, #0 |
| bne L(top) |
| |
| L(end): RETVAL |
| pop {r4-r11} |
| return r14 |
| EPILOGUE() |
