diff options
Diffstat (limited to 'gmp-6.3.0/mpn/arm/v7a/cora15/aors_n.asm')
-rw-r--r-- | gmp-6.3.0/mpn/arm/v7a/cora15/aors_n.asm | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/arm/v7a/cora15/aors_n.asm b/gmp-6.3.0/mpn/arm/v7a/cora15/aors_n.asm new file mode 100644 index 0000000..dc3f839 --- /dev/null +++ b/gmp-6.3.0/mpn/arm/v7a/cora15/aors_n.asm @@ -0,0 +1,162 @@ +dnl ARM mpn_add_n/mpn_sub_n optimised for A15. + +dnl Copyright 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 best +C StrongARM: - +C XScale ? +C Cortex-A7 ? +C Cortex-A8 ? +C Cortex-A9 3.55 2.5 +C Cortex-A15 1.27 this + +C This was a major improvement compared to the code we had before, but it might +C not be the best 8-way code possible. We've tried some permutations of auto- +C increments and separate pointer updates, but they all ran at the same speed +C on A15. + +C Architecture requirements: +C v5 - +C v5t - +C v5te ldrd strd +C v6 - +C v6t2 - +C v7a - + +define(`rp', `r0') +define(`up', `r1') +define(`vp', `r2') +define(`n', `r3') + +ifdef(`OPERATION_add_n', ` + define(`ADDSUBC', adcs) + define(`IFADD', `$1') + define(`SETCY', `cmp $1, #1') + define(`RETVAL', `adc r0, n, #0') + define(`RETVAL2', `adc r0, n, #1') + define(`func', mpn_add_n) + define(`func_nc', mpn_add_nc)') +ifdef(`OPERATION_sub_n', ` + define(`ADDSUBC', sbcs) + define(`IFADD', `') + define(`SETCY', `rsbs $1, $1, #0') + define(`RETVAL', `sbc r0, r0, r0 + and r0, r0, #1') + define(`RETVAL2', `RETVAL') + define(`func', mpn_sub_n) + define(`func_nc', mpn_sub_nc)') + +MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc) + +ASM_START() +PROLOGUE(func_nc) + ldr r12, [sp] + b L(ent) +EPILOGUE() +PROLOGUE(func) + mov r12, #0 +L(ent): push { r4-r9 } + + ands r6, n, #3 + mov n, n, lsr #2 + beq L(b00) + cmp r6, #2 + bcc L(b01) + beq L(b10) + +L(b11): ldr r5, [up], #4 + ldr r7, [vp], #4 + SETCY( r12) + ADDSUBC r9, r5, r7 + ldrd r4, r5, [up, #0] + ldrd r6, r7, [vp, #0] + str r9, [rp], #-4 + b L(lo) + +L(b00): ldrd r4, r5, [up], #-8 + ldrd r6, r7, [vp], #-8 + SETCY( r12) + sub rp, rp, #16 + b L(mid) + +L(b01): ldr r5, [up], #-4 + ldr r7, [vp], #-4 + SETCY( r12) + ADDSUBC r9, r5, r7 + str r9, [rp], #-12 + tst n, n + beq L(wd1) +L(gt1): ldrd r4, r5, [up, #8] + ldrd r6, r7, [vp, #8] + b L(mid) + +L(b10): ldrd r4, r5, [up] + ldrd r6, r7, [vp] + SETCY( r12) + sub rp, rp, #8 + b L(lo) + + ALIGN(16) +L(top): ldrd r4, r5, [up, #8] + ldrd r6, r7, [vp, #8] + strd r8, r9, [rp, #8] +L(mid): ADDSUBC r8, r4, r6 + ADDSUBC r9, r5, r7 + ldrd r4, r5, [up, #16] + ldrd r6, r7, [vp, #16] + strd r8, r9, [rp, #16] + ADDSUBC r8, r4, r6 + ADDSUBC r9, r5, r7 + sub n, n, #2 + tst n, n + bmi L(dne) + ldrd r4, r5, [up, #24] + ldrd r6, r7, [vp, #24] + strd r8, r9, [rp, #24] + ADDSUBC r8, r4, r6 + ADDSUBC r9, r5, r7 + ldrd r4, r5, [up, #32]! + ldrd r6, r7, [vp, #32]! + strd r8, r9, [rp, #32]! +L(lo): ADDSUBC r8, r4, r6 + ADDSUBC r9, r5, r7 + tst n, n + bne L(top) + +L(end): strd r8, r9, [rp, #8] +L(wd1): RETVAL + pop { r4-r9 } + bx r14 +L(dne): strd r8, r9, [rp, #24] + RETVAL2 + pop { r4-r9 } + bx r14 +EPILOGUE() |