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|
dnl SPARC v9 32-bit mpn_sqr_diagonal.
dnl Copyright 2001, 2003 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
C rp i0
C up i1
C n i2
C This code uses a very deep software pipeline, due to the need for moving data
C forth and back between the integer registers and floating-point registers.
C
C A VIS variant of this code would make the pipeline less deep, since the
C masking now done in the integer unit could take place in the floating-point
C unit using the FAND instruction. It would be possible to save several cycles
C too.
C
C On UltraSPARC 1 and 2, this code runs at 11 cycles/limb from the Dcache and
C not much slower from the Ecache. It would perhaps be possible to shave off
C one cycle, but not easily. We cannot do better than 10 cycles/limb with the
C used instructions, since we have 10 memory operations per limb. But a VIS
C variant could run three cycles faster than the corresponding non-VIS code.
C This is non-pipelined code showing the algorithm:
C
C .Loop:
C lduw [up+0],%g4 C 00000000hhhhllll
C sllx %g4,16,%g3 C 0000hhhhllll0000
C or %g3,%g4,%g2 C 0000hhhhXXXXllll
C andn %g2,%g5,%g2 C 0000hhhh0000llll
C stx %g2,[%fp+80]
C ldd [%fp+80],%f0
C fitod %f0,%f4 C hi16
C fitod %f1,%f6 C lo16
C ld [up+0],%f9
C fxtod %f8,%f2
C fmuld %f2,%f4,%f4
C fmuld %f2,%f6,%f6
C fdtox %f4,%f4
C fdtox %f6,%f6
C std %f4,[%fp-24]
C std %f6,[%fp-16]
C ldx [%fp-24],%g2
C ldx [%fp-16],%g1
C sllx %g2,16,%g2
C add %g2,%g1,%g1
C stw %g1,[rp+0]
C srlx %g1,32,%l0
C stw %l0,[rp+4]
C add up,4,up
C subcc n,1,n
C bne,pt %icc,.Loop
C add rp,8,rp
define(`fanop',`fitod %f12,%f10') dnl A quasi nop running in the FA pipe
ASM_START()
TEXT
ALIGN(4)
.Lnoll:
.word 0
PROLOGUE(mpn_sqr_diagonal)
save %sp,-256,%sp
ifdef(`PIC',
`.Lpc: rd %pc,%o7
ld [%o7+.Lnoll-.Lpc],%f8',
` sethi %hi(.Lnoll),%g1
ld [%g1+%lo(.Lnoll)],%f8')
sethi %hi(0xffff0000),%g5
add %i1,-8,%i1
lduw [%i1+8],%g4
add %i1,4,%i1 C s1_ptr++
sllx %g4,16,%g3 C 0000hhhhllll0000
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
bne,pt %icc,.L_grt_1
andn %g2,%g5,%g2 C 0000hhhh0000llll
add %i1,4,%i1 C s1_ptr++
stx %g2,[%fp+80]
ld [%i1],%f9
ldd [%fp+80],%f0
fxtod %f8,%f2
fitod %f0,%f4
fitod %f1,%f6
fmuld %f2,%f4,%f4
fmuld %f2,%f6,%f6
fdtox %f4,%f4
fdtox %f6,%f6
std %f4,[%fp-24]
std %f6,[%fp-16]
add %fp, 80, %l3
add %fp, -24, %l4
add %fp, 72, %l5
b .L1
add %fp, -40, %l6
.L_grt_1:
stx %g2,[%fp+80]
lduw [%i1+8],%g4
add %i1,4,%i1 C s1_ptr++
sllx %g4,16,%g3 C 0000hhhhllll0000
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
bne,pt %icc,.L_grt_2
andn %g2,%g5,%g2 C 0000hhhh0000llll
stx %g2,[%fp+72]
ld [%i1],%f9
add %i1,4,%i1 C s1_ptr++
ldd [%fp+80],%f0
fxtod %f8,%f2
fitod %f0,%f4
fitod %f1,%f6
fmuld %f2,%f4,%f4
ld [%i1],%f9
fmuld %f2,%f6,%f6
ldd [%fp+72],%f0
fdtox %f4,%f4
fdtox %f6,%f6
std %f4,[%fp-24]
fxtod %f8,%f2
std %f6,[%fp-16]
fitod %f0,%f4
fitod %f1,%f6
fmuld %f2,%f4,%f4
fmuld %f2,%f6,%f6
fdtox %f4,%f4
add %fp, 72, %l3
add %fp, -40, %l4
add %fp, 80, %l5
b .L2
add %fp, -24, %l6
.L_grt_2:
stx %g2,[%fp+72]
lduw [%i1+8],%g4
ld [%i1],%f9
add %i1,4,%i1 C s1_ptr++
ldd [%fp+80],%f0
sllx %g4,16,%g3 C 0000hhhhllll0000
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
fxtod %f8,%f2
bne,pt %icc,.L_grt_3
andn %g2,%g5,%g2 C 0000hhhh0000llll
stx %g2,[%fp+80]
fitod %f0,%f4
fitod %f1,%f6
fmuld %f2,%f4,%f4
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %i1,4,%i1 C s1_ptr++
ldd [%fp+72],%f0
fdtox %f4,%f4
fdtox %f6,%f6
std %f4,[%fp-24]
fxtod %f8,%f2
std %f6,[%fp-16]
fitod %f0,%f4
fitod %f1,%f6
fmuld %f2,%f4,%f4
ld [%i1],%f9
add %fp, 80, %l3
fmuld %f2,%f6,%f6
add %fp, -24, %l4
ldd [%fp+80],%f0
add %fp, 72, %l5
fdtox %f4,%f4
b .L3
add %fp, -40, %l6
.L_grt_3:
stx %g2,[%fp+80]
fitod %f0,%f4
lduw [%i1+8],%g4
fitod %f1,%f6
fmuld %f2,%f4,%f4
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %i1,4,%i1 C s1_ptr++
ldd [%fp+72],%f0
fdtox %f4,%f4
sllx %g4,16,%g3 C 0000hhhhllll0000
fdtox %f6,%f6
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
std %f4,[%fp-24]
fxtod %f8,%f2
std %f6,[%fp-16]
bne,pt %icc,.L_grt_4
andn %g2,%g5,%g2 C 0000hhhh0000llll
stx %g2,[%fp+72]
fitod %f0,%f4
fitod %f1,%f6
add %fp, 72, %l3
fmuld %f2,%f4,%f4
add %fp, -40, %l4
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %i1,4,%i1 C s1_ptr++
ldd [%fp+80],%f0
add %fp, 80, %l5
fdtox %f4,%f4
b .L4
add %fp, -24, %l6
.L_grt_4:
stx %g2,[%fp+72]
fitod %f0,%f4
lduw [%i1+8],%g4
fitod %f1,%f6
fmuld %f2,%f4,%f4
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %i1,4,%i1 C s1_ptr++
ldd [%fp+80],%f0
fdtox %f4,%f4
sllx %g4,16,%g3 C 0000hhhhllll0000
fdtox %f6,%f6
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
std %f4,[%fp-40]
fxtod %f8,%f2
std %f6,[%fp-32]
be,pn %icc,.L5
andn %g2,%g5,%g2 C 0000hhhh0000llll
b,a .Loop
.align 16
C --- LOOP BEGIN
.Loop: nop
nop
stx %g2,[%fp+80]
fitod %f0,%f4
C ---
nop
nop
lduw [%i1+8],%g4
fitod %f1,%f6
C ---
nop
nop
ldx [%fp-24],%g2 C p16
fanop
C ---
nop
nop
ldx [%fp-16],%g1 C p0
fmuld %f2,%f4,%f4
C ---
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
ld [%i1],%f9
fmuld %f2,%f6,%f6
C ---
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
add %i1,4,%i1 C s1_ptr++
ldd [%fp+72],%f0
fanop
C ---
srlx %g1,32,%l0
nop
stw %g1,[%i0-8]
fdtox %f4,%f4
C ---
sllx %g4,16,%g3 C 0000hhhhllll0000
nop
stw %l0,[%i0-4]
fdtox %f6,%f6
C ---
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
std %f4,[%fp-24]
fxtod %f8,%f2
C ---
std %f6,[%fp-16]
andn %g2,%g5,%g2 C 0000hhhh0000llll
be,pn %icc,.Lend
fanop
C --- LOOP MIDDLE
nop
nop
stx %g2,[%fp+72]
fitod %f0,%f4
C ---
nop
nop
lduw [%i1+8],%g4
fitod %f1,%f6
C ---
nop
nop
ldx [%fp-40],%g2 C p16
fanop
C ---
nop
nop
ldx [%fp-32],%g1 C p0
fmuld %f2,%f4,%f4
C ---
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
ld [%i1],%f9
fmuld %f2,%f6,%f6
C ---
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
add %i1,4,%i1 C s1_ptr++
ldd [%fp+80],%f0
fanop
C ---
srlx %g1,32,%l0
nop
stw %g1,[%i0-8]
fdtox %f4,%f4
C ---
sllx %g4,16,%g3 C 0000hhhhllll0000
nop
stw %l0,[%i0-4]
fdtox %f6,%f6
C ---
or %g3,%g4,%g2 C 0000hhhhXXXXllll
subcc %i2,1,%i2
std %f4,[%fp-40]
fxtod %f8,%f2
C ---
std %f6,[%fp-32]
andn %g2,%g5,%g2 C 0000hhhh0000llll
bne,pt %icc,.Loop
fanop
C --- LOOP END
.L5: add %fp, 80, %l3
add %fp, -24, %l4
add %fp, 72, %l5
b .Ltail
add %fp, -40, %l6
.Lend: add %fp, 72, %l3
add %fp, -40, %l4
add %fp, 80, %l5
add %fp, -24, %l6
.Ltail: stx %g2,[%l3]
fitod %f0,%f4
fitod %f1,%f6
ldx [%l4],%g2 C p16
ldx [%l4+8],%g1 C p0
fmuld %f2,%f4,%f4
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
add %i1,4,%i1 C s1_ptr++
ldd [%l5],%f0
srlx %g1,32,%l0
stw %g1,[%i0-8]
fdtox %f4,%f4
stw %l0,[%i0-4]
.L4: fdtox %f6,%f6
std %f4,[%l4]
fxtod %f8,%f2
std %f6,[%l4+8]
fitod %f0,%f4
fitod %f1,%f6
ldx [%l6],%g2 C p16
ldx [%l6+8],%g1 C p0
fmuld %f2,%f4,%f4
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
ld [%i1],%f9
fmuld %f2,%f6,%f6
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
ldd [%l3],%f0
srlx %g1,32,%l0
stw %g1,[%i0-8]
fdtox %f4,%f4
stw %l0,[%i0-4]
.L3: fdtox %f6,%f6
std %f4,[%l6]
fxtod %f8,%f2
std %f6,[%l6+8]
fitod %f0,%f4
fitod %f1,%f6
ldx [%l4],%g2 C p16
ldx [%l4+8],%g1 C p0
fmuld %f2,%f4,%f4
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
fmuld %f2,%f6,%f6
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
srlx %g1,32,%l0
stw %g1,[%i0-8]
fdtox %f4,%f4
stw %l0,[%i0-4]
.L2: fdtox %f6,%f6
std %f4,[%l4]
std %f6,[%l4+8]
ldx [%l6],%g2 C p16
ldx [%l6+8],%g1 C p0
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
srlx %g1,32,%l0
stw %g1,[%i0-8]
stw %l0,[%i0-4]
.L1: ldx [%l4],%g2 C p16
ldx [%l4+8],%g1 C p0
sllx %g2,16,%g2 C align p16
add %i0,8,%i0 C res_ptr++
add %g2,%g1,%g1 C add p16 to p0 (ADD1)
srlx %g1,32,%l0
stw %g1,[%i0-8]
stw %l0,[%i0-4]
ret
restore %g0,%g0,%o0
EPILOGUE(mpn_sqr_diagonal)
|
