summaryrefslogtreecommitdiff
path: root/Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm')
-rw-r--r--Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm136
1 files changed, 136 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm b/Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm
new file mode 100644
index 00000000000..a3c3ca791c2
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/s390_64/aors_n.asm
@@ -0,0 +1,136 @@
+dnl S/390-64 mpn_add_n and mpn_sub_n.
+
+dnl Copyright 2011 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 z900 5.5
+C z990 3
+C z9 ?
+C z10 6
+C z196 ?
+
+C TODO
+C * Optimise for small n
+C * Use r0 and save/restore one less register
+C * Using logops_n's v1 inner loop operand order make the loop about 20%
+C faster, at the expense of highly alignment-dependent performance.
+
+C INPUT PARAMETERS
+define(`rp', `%r2')
+define(`up', `%r3')
+define(`vp', `%r4')
+define(`n', `%r5')
+
+ifdef(`OPERATION_add_n', `
+ define(ADSB, alg)
+ define(ADSBCR, alcgr)
+ define(ADSBC, alcg)
+ define(RETVAL,`dnl
+ lghi %r2, 0
+ alcgr %r2, %r2')
+ define(func, mpn_add_n)
+ define(func_nc, mpn_add_nc)')
+ifdef(`OPERATION_sub_n', `
+ define(ADSB, slg)
+ define(ADSBCR, slbgr)
+ define(ADSBC, slbg)
+ define(RETVAL,`dnl
+ slbgr %r2, %r2
+ lcgr %r2, %r2')
+ define(func, mpn_sub_n)
+ define(func_nc, mpn_sub_nc)')
+
+MULFUNC_PROLOGUE(mpn_add_n mpn_sub_n)
+
+ASM_START()
+PROLOGUE(func)
+ stmg %r6, %r8, 48(%r15)
+
+ aghi n, 3
+ lghi %r7, 3
+ srlg %r1, n, 2
+ ngr %r7, n C n mod 4
+ je L(b1)
+ cghi %r7, 2
+ jl L(b2)
+ jne L(b0)
+
+L(b3): lmg %r5, %r7, 0(up)
+ la up, 24(up)
+ ADSB %r5, 0(vp)
+ ADSBC %r6, 8(vp)
+ ADSBC %r7, 16(vp)
+ la vp, 24(vp)
+ stmg %r5, %r7, 0(rp)
+ la rp, 24(rp)
+ brctg %r1, L(top)
+ j L(end)
+
+L(b0): lmg %r5, %r8, 0(up) C This redundant insns is no mistake,
+ la up, 32(up) C it is needed to make main loop run
+ ADSB %r5, 0(vp) C fast for n = 0 (mod 4).
+ ADSBC %r6, 8(vp)
+ j L(m0)
+
+L(b1): lg %r5, 0(up)
+ la up, 8(up)
+ ADSB %r5, 0(vp)
+ la vp, 8(vp)
+ stg %r5, 0(rp)
+ la rp, 8(rp)
+ brctg %r1, L(top)
+ j L(end)
+
+L(b2): lmg %r5, %r6, 0(up)
+ la up, 16(up)
+ ADSB %r5, 0(vp)
+ ADSBC %r6, 8(vp)
+ la vp, 16(vp)
+ stmg %r5, %r6, 0(rp)
+ la rp, 16(rp)
+ brctg %r1, L(top)
+ j L(end)
+
+L(top): lmg %r5, %r8, 0(up)
+ la up, 32(up)
+ ADSBC %r5, 0(vp)
+ ADSBC %r6, 8(vp)
+L(m0): ADSBC %r7, 16(vp)
+ ADSBC %r8, 24(vp)
+ la vp, 32(vp)
+ stmg %r5, %r8, 0(rp)
+ la rp, 32(rp)
+ brctg %r1, L(top)
+
+L(end): RETVAL
+ lmg %r6, %r8, 48(%r15)
+ br %r14
+EPILOGUE()