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mpir/mpn/ia64/rsh1sub_n.asm

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NASM
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dnl IA-64 mpn_rsh1add_n/mpn_rsh1sub_n -- rp[] = (up[] +- vp[]) >> 1.
dnl Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 3 of the License, or (at
dnl your option) any later version.
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 Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C Itanium: 2.5
C Itanium 2: 1.5
C TODO
C * Rewrite function entry code using aorslsh1_n.asm style.
C * Micro-optimize feed-in and wind-down code.
C INPUT PARAMETERS
define(`rp',`r32')
define(`up',`r33')
define(`vp',`r34')
define(`n',`r35')
define(OPERATION_rsh1sub_n,1)
ifdef(`OPERATION_rsh1add_n',`
define(ADDSUB, add)
define(PRED, ltu)
define(INCR, 1)
define(LIM, -1)
define(func, mpn_rsh1add_n)
')
ifdef(`OPERATION_rsh1sub_n',`
define(ADDSUB, sub)
define(PRED, gtu)
define(INCR, -1)
define(LIM, 0)
define(func, mpn_rsh1sub_n)
')
C Some useful aliases for registers we use
define(`u0',`r14') define(`u1',`r15') define(`u2',`r16') define(`u3',`r17')
define(`v0',`r18') define(`v1',`r19') define(`v2',`r20') define(`v3',`r21')
define(`w0',`r22') define(`w1',`r23') define(`w2',`r24') define(`w3',`r25')
define(`x0',`r26') define(`x1',`r9') define(`x2',`r30') define(`x3',`r31')
ASM_START()
PROLOGUE(func)
.prologue
.save ar.lc, r2
.body
ifdef(`HAVE_ABI_32',`
addp4 rp = 0, rp C M I
addp4 up = 0, up C M I
addp4 vp = 0, vp C M I
zxt4 n = n C I
;;
')
{.mmi; ld8 r11 = [vp], 8 C M01
ld8 r10 = [up], 8 C M01
mov.i r2 = ar.lc C I0
}{.mmi; and r14 = 3, n C M I
cmp.lt p15, p0 = 4, n C M I
add n = -4, n C M I
;;
}{.mmi; cmp.eq p6, p0 = 1, r14 C M I
cmp.eq p7, p0 = 2, r14 C M I
cmp.eq p8, p0 = 3, r14 C M I
}{.bbb
(p6) br.dptk .Lb01 C B
(p7) br.dptk .Lb10 C B
(p8) br.dptk .Lb11 C B
}
.Lb00: ld8 v0 = [vp], 8 C M01
ld8 u0 = [up], 8 C M01
shr.u n = n, 2 C I0
;;
ld8 v1 = [vp], 8 C M01
ld8 u1 = [up], 8 C M01
ADDSUB w3 = r10, r11 C M I
;;
ld8 v2 = [vp], 8 C M01
ld8 u2 = [up], 8 C M01
(p15) br.dpnt .grt4 C B
;;
cmp.PRED p7, p0 = w3, r10 C M I
and r8 = 1, w3 C M I
ADDSUB w0 = u0, v0 C M I
;;
cmp.PRED p8, p0 = w0, u0 C M I
ADDSUB w1 = u1, v1 C M I
;;
cmp.PRED p9, p0 = w1, u1 C M I
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
;;
shrp x3 = w0, w3, 1 C I0
ADDSUB w2 = u2, v2 C M I
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
br .Lcj4 C B
.grt4: ld8 v3 = [vp], 8 C M01
cmp.PRED p7, p0 = w3, r10 C M I
ld8 u3 = [up], 8 C M01
and r8 = 1, w3 C M I
;;
ADDSUB w0 = u0, v0 C M I
ld8 v0 = [vp], 8 C M01
add n = -1, n
;;
cmp.PRED p8, p0 = w0, u0 C M I
ld8 u0 = [up], 8 C M01
ADDSUB w1 = u1, v1 C M I
;;
ld8 v1 = [vp], 8 C M01
mov.i ar.lc = n C I0
cmp.PRED p9, p0 = w1, u1 C M I
ld8 u1 = [up], 8 C M01
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
;;
ADDSUB w2 = u2, v2 C M I
ld8 v2 = [vp], 8 C M01
shrp x3 = w0, w3, 1 C I0
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
br .LL00 C B
.Lb01: ADDSUB w2 = r10, r11 C M I
shr.u n = n, 2 C I0
(p15) br.dpnt .grt1 C B
;;
cmp.PRED p6, p7 = w2, r10 C M I
shr.u x2 = w2, 1 C I0
and r8 = 1, w2 C M I
;;
(p6) dep x2 = -1, x2, 63, 1 C I0
br .Lcj1 C B
.grt1: ld8 v3 = [vp], 8 C M01
ld8 u3 = [up], 8 C M01
;;
ld8 v0 = [vp], 8 C M01
ld8 u0 = [up], 8 C M01
mov.i ar.lc = n C FIXME swap with next I0
;;
ld8 v1 = [vp], 8 C M01
ld8 u1 = [up], 8 C M01
;;
ld8 v2 = [vp], 8 C M01
ld8 u2 = [up], 8 C M01
cmp.PRED p6, p0 = w2, r10 C M I
and r8 = 1, w2 C M I
ADDSUB w3 = u3, v3 C M I
br.cloop.dptk .grt5 C B
;;
cmp.PRED p7, p0 = w3, u3 C M I
;;
ADDSUB w0 = u0, v0 C M I
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
;;
cmp.PRED p8, p0 = w0, u0 C M I
shrp x2 = w3, w2, 1 C I0
ADDSUB w1 = u1, v1 C M I
;;
cmp.PRED p9, p0 = w1, u1 C M I
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
br .Lcj5 C B
.grt5: ld8 v3 = [vp], 8 C M01
cmp.PRED p7, p0 = w3, u3 C M I
ld8 u3 = [up], 8 C M01
;;
ADDSUB w0 = u0, v0 C M I
ld8 v0 = [vp], 8 C M01
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
;;
cmp.PRED p8, p0 = w0, u0 C M I
shrp x2 = w3, w2, 1 C I0
ld8 u0 = [up], 8 C M01
ADDSUB w1 = u1, v1 C M I
;;
ld8 v1 = [vp], 8 C M01
cmp.PRED p9, p0 = w1, u1 C M I
ld8 u1 = [up], 8 C M01
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
br .LL01 C B
.Lb10: ld8 v2 = [vp], 8 C M01
ld8 u2 = [up], 8 C M01
shr.u n = n, 2 C I0
ADDSUB w1 = r10, r11 C M I
(p15) br.dpnt .grt2 C B
;;
cmp.PRED p9, p0 = w1, r10 C M I
and r8 = 1, w1 C M I
ADDSUB w2 = u2, v2 C M I
;;
cmp.PRED p6, p0 = w2, u2 C M I
;;
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
shrp x1 = w2, w1, 1 C I0
shr.u x2 = w2, 1 C I0
br .Lcj2 C B
.grt2: ld8 v3 = [vp], 8 C M01
ld8 u3 = [up], 8 C M01
;;
ld8 v0 = [vp], 8 C M01
ld8 u0 = [up], 8 C M01
mov.i ar.lc = n C I0
;;
ld8 v1 = [vp], 8 C M01
cmp.PRED p9, p0 = w1, r10 C M I
ld8 u1 = [up], 8 C M01
and r8 = 1, w1 C M I
;;
ADDSUB w2 = u2, v2 C M I
ld8 v2 = [vp], 8 C M01
;;
cmp.PRED p6, p0 = w2, u2 C M I
ld8 u2 = [up], 8 C M01
ADDSUB w3 = u3, v3 C M I
br.cloop.dptk .grt6 C B
;;
cmp.PRED p7, p0 = w3, u3 C M I
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
shrp x1 = w2, w1, 1 C I0
ADDSUB w0 = u0, v0 C M I
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
br .Lcj6 C B
.grt6: ld8 v3 = [vp], 8 C M01
cmp.PRED p7, p0 = w3, u3 C M I
ld8 u3 = [up], 8 C M01
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
shrp x1 = w2, w1, 1 C I0
ADDSUB w0 = u0, v0 C M I
ld8 v0 = [vp], 8 C M01
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
br .LL10 C B
.Lb11: ld8 v1 = [vp], 8 C M01
ld8 u1 = [up], 8 C M01
shr.u n = n, 2 C I0
;;
ld8 v2 = [vp], 8 C M01
ld8 u2 = [up], 8 C M01
ADDSUB w0 = r10, r11 C M I
(p15) br.dpnt .grt3 C B
;;
cmp.PRED p8, p0 = w0, r10 C M I
ADDSUB w1 = u1, v1 C M I
and r8 = 1, w0 C M I
;;
cmp.PRED p9, p0 = w1, u1 C M I
;;
ADDSUB w2 = u2, v2 C M I
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
;;
cmp.PRED p6, p0 = w2, u2 C M I
shrp x0 = w1, w0, 1 C I0
;;
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
br .Lcj3 C B
.grt3: ld8 v3 = [vp], 8 C M01
ld8 u3 = [up], 8 C M01
;;
ld8 v0 = [vp], 8 C M01
mov.i ar.lc = n C I0
cmp.PRED p8, p0 = w0, r10 C M I
ld8 u0 = [up], 8 C M01
ADDSUB w1 = u1, v1 C M I
and r8 = 1, w0 C M I
;;
ld8 v1 = [vp], 8 C M01
cmp.PRED p9, p0 = w1, u1 C M I
ld8 u1 = [up], 8 C M01
;;
ADDSUB w2 = u2, v2 C M I
ld8 v2 = [vp], 8 C M01
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
;;
cmp.PRED p6, p0 = w2, u2 C M I
shrp x0 = w1, w0, 1 C I0
ld8 u2 = [up], 8 C M01
ADDSUB w3 = u3, v3 C M I
br.cloop.dptk .grt7 C B
;;
cmp.PRED p7, p0 = w3, u3 C M I
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
br .Lcj7 C B
.grt7: ld8 v3 = [vp], 8 C M01
cmp.PRED p7, p0 = w3, u3 C M I
ld8 u3 = [up], 8 C M01
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
br .LL11 C B
C *** MAIN LOOP START ***
ALIGN(32)
.Loop: st8 [rp] = x3, 8 C M23
ld8 v3 = [vp], 8 C M01
cmp.PRED p7, p0 = w3, u3 C M I
ld8 u3 = [up], 8 C M01
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
.LL11: st8 [rp] = x0, 8 C M23
shrp x1 = w2, w1, 1 C I0
ADDSUB w0 = u0, v0 C M I
ld8 v0 = [vp], 8 C M01
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
;;
.LL10: cmp.PRED p8, p0 = w0, u0 C M I
shrp x2 = w3, w2, 1 C I0
nop.b 0
ld8 u0 = [up], 8 C M01
ADDSUB w1 = u1, v1 C M I
nop.b 0
;;
st8 [rp] = x1, 8 C M23
ld8 v1 = [vp], 8 C M01
cmp.PRED p9, p0 = w1, u1 C M I
ld8 u1 = [up], 8 C M01
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
;;
.LL01: st8 [rp] = x2, 8 C M23
shrp x3 = w0, w3, 1 C I0
ADDSUB w2 = u2, v2 C M I
ld8 v2 = [vp], 8 C M01
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
;;
.LL00: cmp.PRED p6, p0 = w2, u2 C M I
shrp x0 = w1, w0, 1 C I0
nop.b 0
ld8 u2 = [up], 8 C M01
ADDSUB w3 = u3, v3 C M I
br.cloop.dptk .Loop C B
;;
C *** MAIN LOOP END ***
.Lskip: st8 [rp] = x3, 8 C M23
cmp.PRED p7, p0 = w3, u3 C M I
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
.Lcj7: st8 [rp] = x0, 8 C M23
shrp x1 = w2, w1, 1 C I0
ADDSUB w0 = u0, v0 C M I
(p6) cmp.eq.or p7, p0 = LIM, w3 C M I
(p6) add w3 = INCR, w3 C M I
;;
.Lcj6: cmp.PRED p8, p0 = w0, u0 C M I
shrp x2 = w3, w2, 1 C I0
ADDSUB w1 = u1, v1 C M I
;;
st8 [rp] = x1, 8 C M23
cmp.PRED p9, p0 = w1, u1 C M I
(p7) cmp.eq.or p8, p0 = LIM, w0 C M I
(p7) add w0 = INCR, w0 C M I
;;
.Lcj5: st8 [rp] = x2, 8 C M23
shrp x3 = w0, w3, 1 C I0
ADDSUB w2 = u2, v2 C M I
(p8) cmp.eq.or p9, p0 = LIM, w1 C M I
(p8) add w1 = INCR, w1 C M I
;;
.Lcj4: cmp.PRED p6, p0 = w2, u2 C M I
shrp x0 = w1, w0, 1 C I0
;;
st8 [rp] = x3, 8 C M23
(p9) cmp.eq.or p6, p0 = LIM, w2 C M I
(p9) add w2 = INCR, w2 C M I
;;
.Lcj3: st8 [rp] = x0, 8 C M23
shrp x1 = w2, w1, 1 C I0
shr.u x2 = w2, 1 C I0
;;
.Lcj2: st8 [rp] = x1, 8 C M23
(p6) dep x2 = -1, x2, 63, 1 C I0
;;
.Lcj1: st8 [rp] = x2 C M23
mov.i ar.lc = r2 C I0
br.ret.sptk.many b0 C B
EPILOGUE()
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