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openssl/crypto/ppccpuid.pl
Bernd Edlinger b6769a3865 PPC: Try out if mftb works before using it 
If this fails try out if mfspr268 works.

Use OPENSSL_ppccap=0x20 for enabling mftb,
OPENSSL_ppccap=0x40 for enabling mfspr268,
and OPENSSL_ppccap=0 for enabling neither.

Fixes #8012

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8043)

(cherry picked from commit c8f370485c)
2019-01-21 15:45:53 +01:00

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#! /usr/bin/env perl
# Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
$flavour = shift;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
( $xlate="${dir}perlasm/ppc-xlate.pl" and -f $xlate) or
die "can't locate ppc-xlate.pl";
open STDOUT,"| $^X $xlate $flavour ".shift || die "can't call $xlate: $!";
if ($flavour=~/64/) {
$CMPLI="cmpldi";
$SHRLI="srdi";
$SIGNX="extsw";
} else {
$CMPLI="cmplwi";
$SHRLI="srwi";
$SIGNX="mr";
}
$code=<<___;
.machine "any"
.text
.globl .OPENSSL_fpu_probe
.align 4
.OPENSSL_fpu_probe:
fmr f0,f0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_fpu_probe,.-.OPENSSL_fpu_probe
.globl .OPENSSL_ppc64_probe
.align 4
.OPENSSL_ppc64_probe:
fcfid f1,f1
extrdi r0,r0,32,0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_ppc64_probe,.-.OPENSSL_ppc64_probe
.globl .OPENSSL_altivec_probe
.align 4
.OPENSSL_altivec_probe:
.long 0x10000484 # vor v0,v0,v0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_altivec_probe,.-..OPENSSL_altivec_probe
.globl .OPENSSL_crypto207_probe
.align 4
.OPENSSL_crypto207_probe:
lvx_u v0,0,r1
vcipher v0,v0,v0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_crypto207_probe,.-.OPENSSL_crypto207_probe
.globl .OPENSSL_madd300_probe
.align 4
.OPENSSL_madd300_probe:
xor r0,r0,r0
maddld r3,r0,r0,r0
maddhdu r3,r0,r0,r0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.globl .OPENSSL_wipe_cpu
.align 4
.OPENSSL_wipe_cpu:
xor r0,r0,r0
fmr f0,f31
fmr f1,f31
fmr f2,f31
mr r3,r1
fmr f3,f31
xor r4,r4,r4
fmr f4,f31
xor r5,r5,r5
fmr f5,f31
xor r6,r6,r6
fmr f6,f31
xor r7,r7,r7
fmr f7,f31
xor r8,r8,r8
fmr f8,f31
xor r9,r9,r9
fmr f9,f31
xor r10,r10,r10
fmr f10,f31
xor r11,r11,r11
fmr f11,f31
xor r12,r12,r12
fmr f12,f31
fmr f13,f31
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_wipe_cpu,.-.OPENSSL_wipe_cpu
.globl .OPENSSL_atomic_add
.align 4
.OPENSSL_atomic_add:
Ladd: lwarx r5,0,r3
add r0,r4,r5
stwcx. r0,0,r3
bne- Ladd
$SIGNX r3,r0
blr
.long 0
.byte 0,12,0x14,0,0,0,2,0
.long 0
.size .OPENSSL_atomic_add,.-.OPENSSL_atomic_add
.globl .OPENSSL_rdtsc_mftb
.align 4
.OPENSSL_rdtsc_mftb:
mftb r3
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_rdtsc_mftb,.-.OPENSSL_rdtsc_mftb
.globl .OPENSSL_rdtsc_mfspr268
.align 4
.OPENSSL_rdtsc_mfspr268:
mfspr r3,268
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size .OPENSSL_rdtsc_mfspr268,.-.OPENSSL_rdtsc_mfspr268
.globl .OPENSSL_cleanse
.align 4
.OPENSSL_cleanse:
$CMPLI r4,7
li r0,0
bge Lot
$CMPLI r4,0
beqlr-
Little: mtctr r4
stb r0,0(r3)
addi r3,r3,1
bdnz \$-8
blr
Lot: andi. r5,r3,3
beq Laligned
stb r0,0(r3)
subi r4,r4,1
addi r3,r3,1
b Lot
Laligned:
$SHRLI r5,r4,2
mtctr r5
stw r0,0(r3)
addi r3,r3,4
bdnz \$-8
andi. r4,r4,3
bne Little
blr
.long 0
.byte 0,12,0x14,0,0,0,2,0
.long 0
.size .OPENSSL_cleanse,.-.OPENSSL_cleanse
globl .CRYPTO_memcmp
.align 4
.CRYPTO_memcmp:
$CMPLI r5,0
li r0,0
beq Lno_data
mtctr r5
Loop_cmp:
lbz r6,0(r3)
addi r3,r3,1
lbz r7,0(r4)
addi r4,r4,1
xor r6,r6,r7
or r0,r0,r6
bdnz Loop_cmp
Lno_data:
li r3,0
sub r3,r3,r0
extrwi r3,r3,1,0
blr
.long 0
.byte 0,12,0x14,0,0,0,3,0
.long 0
.size .CRYPTO_memcmp,.-.CRYPTO_memcmp
___
{
my ($out,$cnt,$max)=("r3","r4","r5");
my ($tick,$lasttick)=("r6","r7");
my ($diff,$lastdiff)=("r8","r9");
$code.=<<___;
.globl .OPENSSL_instrument_bus_mftb
.align 4
.OPENSSL_instrument_bus_mftb:
mtctr $cnt
mftb $lasttick # collect 1st tick
li $diff,0
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
Loop: mftb $tick
sub $diff,$tick,$lasttick
mr $lasttick,$tick
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
addi $out,$out,4 # ++$out
bdnz Loop
mr r3,$cnt
blr
.long 0
.byte 0,12,0x14,0,0,0,2,0
.long 0
.size .OPENSSL_instrument_bus_mftb,.-.OPENSSL_instrument_bus_mftb
.globl .OPENSSL_instrument_bus2_mftb
.align 4
.OPENSSL_instrument_bus2_mftb:
mr r0,$cnt
slwi $cnt,$cnt,2
mftb $lasttick # collect 1st tick
li $diff,0
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
mftb $tick # collect 1st diff
sub $diff,$tick,$lasttick
mr $lasttick,$tick
mr $lastdiff,$diff
Loop2:
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
addic. $max,$max,-1
beq Ldone2
mftb $tick
sub $diff,$tick,$lasttick
mr $lasttick,$tick
cmplw 7,$diff,$lastdiff
mr $lastdiff,$diff
mfcr $tick # pull cr
not $tick,$tick # flip bits
rlwinm $tick,$tick,1,29,29 # isolate flipped eq bit and scale
sub. $cnt,$cnt,$tick # conditional --$cnt
add $out,$out,$tick # conditional ++$out
bne Loop2
Ldone2:
srwi $cnt,$cnt,2
sub r3,r0,$cnt
blr
.long 0
.byte 0,12,0x14,0,0,0,3,0
.long 0
.size .OPENSSL_instrument_bus2_mftb,.-.OPENSSL_instrument_bus2_mftb
.globl .OPENSSL_instrument_bus_mfspr268
.align 4
.OPENSSL_instrument_bus_mfspr268:
mtctr $cnt
mfspr $lasttick,268 # collect 1st tick
li $diff,0
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
Loop3: mfspr $tick,268
sub $diff,$tick,$lasttick
mr $lasttick,$tick
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
addi $out,$out,4 # ++$out
bdnz Loop3
mr r3,$cnt
blr
.long 0
.byte 0,12,0x14,0,0,0,2,0
.long 0
.size .OPENSSL_instrument_bus_mfspr268,.-.OPENSSL_instrument_bus_mfspr268
.globl .OPENSSL_instrument_bus2_mfspr268
.align 4
.OPENSSL_instrument_bus2_mfspr268:
mr r0,$cnt
slwi $cnt,$cnt,2
mfspr $lasttick,268 # collect 1st tick
li $diff,0
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
mfspr $tick,268 # collect 1st diff
sub $diff,$tick,$lasttick
mr $lasttick,$tick
mr $lastdiff,$diff
Loop4:
dcbf 0,$out # flush cache line
lwarx $tick,0,$out # load and lock
add $tick,$tick,$diff
stwcx. $tick,0,$out
stwx $tick,0,$out
addic. $max,$max,-1
beq Ldone4
mfspr $tick,268
sub $diff,$tick,$lasttick
mr $lasttick,$tick
cmplw 7,$diff,$lastdiff
mr $lastdiff,$diff
mfcr $tick # pull cr
not $tick,$tick # flip bits
rlwinm $tick,$tick,1,29,29 # isolate flipped eq bit and scale
sub. $cnt,$cnt,$tick # conditional --$cnt
add $out,$out,$tick # conditional ++$out
bne Loop4
Ldone4:
srwi $cnt,$cnt,2
sub r3,r0,$cnt
blr
.long 0
.byte 0,12,0x14,0,0,0,3,0
.long 0
.size .OPENSSL_instrument_bus2_mfspr268,.-.OPENSSL_instrument_bus2_mfspr268
___
}
$code =~ s/\`([^\`]*)\`/eval $1/gem;
print $code;
close STDOUT;
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