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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/loongarch/64/add_n.asm
Initial commit.
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+dnl Loongarch mpn_add_n
+
+dnl Contributed to the GNU project by Torbjorn Granlund.
+
+dnl Copyright 2023 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 INPUT PARAMETERS
+define(`rp_arg',`$r4')
+define(`ap', `$r5')
+define(`bp', `$r6')
+define(`n', `$r7')
+
+define(`rp', `$r8')
+
+ASM_START()
+PROLOGUE(mpn_add_n)
+ alsl.d rp, n, rp_arg, 3
+ alsl.d ap, n, ap, 3
+ alsl.d bp, n, bp, 3
+ sub.d n, $r0, n
+ slli.d n, n, 3
+ or $r4, $r0, $r0
+
+L(top): ldx.d $r14, ap, n
+ ldx.d $r13, bp, n
+ add.d $r12, $r14, $r13
+ sltu $r15, $r12, $r13 C cy0
+ add.d $r14, $r12, $r4
+ sltu $r16, $r14, $r4 C cy1 set iff r4=1 & r12=111...1
+ stx.d $r14, rp, n
+ addi.d n, n, 8
+ or $r4, $r15, $r16
+ bnez n, L(top)
+
+ jr $r1
+EPILOGUE()