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authorDuncan Wilkie <antigravityd@gmail.com>2023-11-18 06:11:09 -0600
committerDuncan Wilkie <antigravityd@gmail.com>2023-11-18 06:11:09 -0600
commit11da511c784eca003deb90c23570f0873954e0de (patch)
treee14fdd3d5d6345956d67e79ae771d0633d28362b /gmp-6.3.0/mpn/arm64/cnd_aors_n.asm
Initial commit.
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+dnl ARM64 mpn_cnd_add_n, mpn_cnd_sub_n
+
+dnl Contributed to the GNU project by Torbjörn Granlund.
+
+dnl Copyright 2012, 2013, 2017 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 Cortex-A53 3.87-4.37
+C Cortex-A57 1.75
+C X-Gene 2.0
+
+changecom(blah)
+
+define(`cnd', `x0')
+define(`rp', `x1')
+define(`up', `x2')
+define(`vp', `x3')
+define(`n', `x4')
+
+ifdef(`OPERATION_cnd_add_n', `
+ define(`ADDSUBC', adcs)
+ define(`CLRCY', `cmn xzr, xzr')
+ define(`RETVAL', `cset x0, cs')
+ define(`func', mpn_cnd_add_n)')
+ifdef(`OPERATION_cnd_sub_n', `
+ define(`ADDSUBC', sbcs)
+ define(`CLRCY', `cmp xzr, xzr')
+ define(`RETVAL', `cset x0, cc')
+ define(`func', mpn_cnd_sub_n)')
+
+MULFUNC_PROLOGUE(mpn_cnd_add_n mpn_cnd_sub_n)
+
+ASM_START()
+PROLOGUE(func)
+ cmp cnd, #1
+ sbc cnd, cnd, cnd
+
+ CLRCY
+
+ lsr x17, n, #2
+ tbz n, #0, L(bx0)
+
+L(bx1): ldr x13, [vp]
+ ldr x11, [up]
+ bic x7, x13, cnd
+ ADDSUBC x9, x11, x7
+ str x9, [rp]
+ tbnz n, #1, L(b11)
+
+L(b01): cbz x17, L(rt)
+ ldp x12, x13, [vp,#8]
+ ldp x10, x11, [up,#8]
+ sub up, up, #8
+ sub vp, vp, #8
+ sub rp, rp, #24
+ b L(mid)
+
+L(b11): ldp x12, x13, [vp,#8]!
+ ldp x10, x11, [up,#8]!
+ sub rp, rp, #8
+ cbz x17, L(end)
+ b L(top)
+
+L(bx0): ldp x12, x13, [vp]
+ ldp x10, x11, [up]
+ tbnz n, #1, L(b10)
+
+L(b00): sub up, up, #16
+ sub vp, vp, #16
+ sub rp, rp, #32
+ b L(mid)
+
+L(b10): sub rp, rp, #16
+ cbz x17, L(end)
+
+ ALIGN(16)
+L(top): bic x6, x12, cnd
+ bic x7, x13, cnd
+ ldp x12, x13, [vp,#16]
+ ADDSUBC x8, x10, x6
+ ADDSUBC x9, x11, x7
+ ldp x10, x11, [up,#16]
+ stp x8, x9, [rp,#16]
+L(mid): bic x6, x12, cnd
+ bic x7, x13, cnd
+ ldp x12, x13, [vp,#32]!
+ ADDSUBC x8, x10, x6
+ ADDSUBC x9, x11, x7
+ ldp x10, x11, [up,#32]!
+ stp x8, x9, [rp,#32]!
+ sub x17, x17, #1
+ cbnz x17, L(top)
+
+L(end): bic x6, x12, cnd
+ bic x7, x13, cnd
+ ADDSUBC x8, x10, x6
+ ADDSUBC x9, x11, x7
+ stp x8, x9, [rp,#16]
+L(rt): RETVAL
+ ret
+EPILOGUE()