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 mpn_addmul_1 mpn_submul_1
C cycles/limb cycles/limb
C POWER3/PPC630 ? ?
C POWER4/PPC970 ? ?
C POWER5 ? ?
C POWER6 12.25 12.8
C POWER7 ? ?
C TODO
C * Reduce register usage.
C * Schedule function entry code.
C * Unroll more. 8-way unrolling would bring us to 10 c/l, 16-way unrolling
C would bring us to 9 c/l.
C * Handle n = 1 and perhaps n = 2 separately, without saving any registers.
rldicl. r0, n, 0,62 C r0 = n & 3, set cr0
cmpdi cr6, r0, 2
addi n, n, 3 C compute count...
srdi n, n, 2 C ...for ctr
mtctr n C copy loop count into ctr
beq cr0, L(b0)
blt cr6, L(b1)
beq cr6, L(b2)
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