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| #! /usr/bin/env perl
| # Copyright 2016-2020 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
|
| #
| # ====================================================================
| # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
| # project. The module is, however, dual licensed under OpenSSL and
| # CRYPTOGAMS licenses depending on where you obtain it. For further
| # details see http://www.openssl.org/~appro/cryptogams/.
| # ====================================================================
| #
| # This module implements Poly1305 hash for PowerPC.
| #
| # June 2015
| #
| # Numbers are cycles per processed byte with poly1305_blocks alone,
| # and improvement coefficients relative to gcc-generated code.
| #
| # -m32 -m64
| #
| # Freescale e300 14.8/+80% -
| # PPC74x0 7.60/+60% -
| # PPC970 7.00/+114% 3.51/+205%
| # POWER7 3.75/+260% 1.93/+100%
| # POWER8 - 2.03/+200%
| # POWER9 - 2.00/+150%
| #
| # Do we need floating-point implementation for PPC? Results presented
| # in poly1305_ieee754.c are tricky to compare to, because they are for
| # compiler-generated code. On the other hand it's known that floating-
| # point performance can be dominated by FPU latency, which means that
| # there is limit even for ideally optimized (and even vectorized) code.
| # And this limit is estimated to be higher than above -m64 results. Or
| # in other words floating-point implementation can be meaningful to
| # consider only in 32-bit application context. We probably have to
| # recognize that 32-bit builds are getting less popular on high-end
| # systems and therefore tend to target embedded ones, which might not
| # even have FPU...
| #
| # On side note, Power ISA 2.07 enables vector base 2^26 implementation,
| # and POWER8 might have capacity to break 1.0 cycle per byte barrier...
|
| $flavour = shift;
|
| if ($flavour =~ /64/) {
| $SIZE_T =8;
| $LRSAVE =2*$SIZE_T;
| $UCMP ="cmpld";
| $STU ="stdu";
| $POP ="ld";
| $PUSH ="std";
| } elsif ($flavour =~ /32/) {
| $SIZE_T =4;
| $LRSAVE =$SIZE_T;
| $UCMP ="cmplw";
| $STU ="stwu";
| $POP ="lwz";
| $PUSH ="stw";
| } else { die "nonsense $flavour"; }
|
| # Define endianness based on flavour
| # i.e.: linux64le
| $LITTLE_ENDIAN = ($flavour=~/le$/) ? $SIZE_T : 0;
|
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $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: $!";
|
| $FRAME=24*$SIZE_T;
|
| $sp="r1";
| my ($ctx,$inp,$len,$padbit) = map("r$_",(3..6));
| my ($mac,$nonce)=($inp,$len);
| my $mask = "r0";
|
| $code=<<___;
| .machine "any"
| .text
| ___
| if ($flavour =~ /64/) {
| ###############################################################################
| # base 2^64 implementation
|
| my ($h0,$h1,$h2,$d0,$d1,$d2, $r0,$r1,$s1, $t0,$t1) = map("r$_",(7..12,27..31));
|
| $code.=<<___;
| .globl .poly1305_init_int
| .align 4
| .poly1305_init_int:
| xor r0,r0,r0
| std r0,0($ctx) # zero hash value
| std r0,8($ctx)
| std r0,16($ctx)
|
| $UCMP $inp,r0
| beq- Lno_key
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| ld $d0,0($inp) # load key material
| ld $d1,8($inp)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $h0,4
| lwbrx $d0,0,$inp # load key material
| li $d1,8
| lwbrx $h0,$h0,$inp
| li $h1,12
| lwbrx $d1,$d1,$inp
| lwbrx $h1,$h1,$inp
| insrdi $d0,$h0,32,0
| insrdi $d1,$h1,32,0
| ___
| $code.=<<___;
| lis $h1,0xfff # 0x0fff0000
| ori $h1,$h1,0xfffc # 0x0ffffffc
| insrdi $h1,$h1,32,0 # 0x0ffffffc0ffffffc
| ori $h0,$h1,3 # 0x0ffffffc0fffffff
|
| and $d0,$d0,$h0
| and $d1,$d1,$h1
|
| std $d0,32($ctx) # store key
| std $d1,40($ctx)
|
| Lno_key:
| xor r3,r3,r3
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,2,0
| .size .poly1305_init_int,.-.poly1305_init_int
|
| .globl .poly1305_blocks
| .align 4
| .poly1305_blocks:
| srdi. $len,$len,4
| beq- Labort
|
| $STU $sp,-$FRAME($sp)
| mflr r0
| $PUSH r27,`$FRAME-$SIZE_T*5`($sp)
| $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
| $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
| $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
| $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
| $PUSH r0,`$FRAME+$LRSAVE`($sp)
|
| ld $r0,32($ctx) # load key
| ld $r1,40($ctx)
|
| ld $h0,0($ctx) # load hash value
| ld $h1,8($ctx)
| ld $h2,16($ctx)
|
| srdi $s1,$r1,2
| mtctr $len
| add $s1,$s1,$r1 # s1 = r1 + r1>>2
| li $mask,3
| b Loop
|
| .align 4
| Loop:
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| ld $t0,0($inp) # load input
| ld $t1,8($inp)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $d0,4
| lwbrx $t0,0,$inp # load input
| li $t1,8
| lwbrx $d0,$d0,$inp
| li $d1,12
| lwbrx $t1,$t1,$inp
| lwbrx $d1,$d1,$inp
| insrdi $t0,$d0,32,0
| insrdi $t1,$d1,32,0
| ___
| $code.=<<___;
| addi $inp,$inp,16
|
| addc $h0,$h0,$t0 # accumulate input
| adde $h1,$h1,$t1
|
| mulld $d0,$h0,$r0 # h0*r0
| mulhdu $d1,$h0,$r0
| adde $h2,$h2,$padbit
|
| mulld $t0,$h1,$s1 # h1*5*r1
| mulhdu $t1,$h1,$s1
| addc $d0,$d0,$t0
| adde $d1,$d1,$t1
|
| mulld $t0,$h0,$r1 # h0*r1
| mulhdu $d2,$h0,$r1
| addc $d1,$d1,$t0
| addze $d2,$d2
|
| mulld $t0,$h1,$r0 # h1*r0
| mulhdu $t1,$h1,$r0
| addc $d1,$d1,$t0
| adde $d2,$d2,$t1
|
| mulld $t0,$h2,$s1 # h2*5*r1
| mulld $t1,$h2,$r0 # h2*r0
| addc $d1,$d1,$t0
| adde $d2,$d2,$t1
|
| andc $t0,$d2,$mask # final reduction step
| and $h2,$d2,$mask
| srdi $t1,$t0,2
| add $t0,$t0,$t1
| addc $h0,$d0,$t0
| addze $h1,$d1
| addze $h2,$h2
|
| bdnz Loop
|
| std $h0,0($ctx) # store hash value
| std $h1,8($ctx)
| std $h2,16($ctx)
|
| $POP r27,`$FRAME-$SIZE_T*5`($sp)
| $POP r28,`$FRAME-$SIZE_T*4`($sp)
| $POP r29,`$FRAME-$SIZE_T*3`($sp)
| $POP r30,`$FRAME-$SIZE_T*2`($sp)
| $POP r31,`$FRAME-$SIZE_T*1`($sp)
| addi $sp,$sp,$FRAME
| Labort:
| blr
| .long 0
| .byte 0,12,4,1,0x80,5,4,0
| .size .poly1305_blocks,.-.poly1305_blocks
|
| .globl .poly1305_emit
| .align 4
| .poly1305_emit:
| ld $h0,0($ctx) # load hash
| ld $h1,8($ctx)
| ld $h2,16($ctx)
| ld $padbit,0($nonce) # load nonce
| ld $nonce,8($nonce)
|
| addic $d0,$h0,5 # compare to modulus
| addze $d1,$h1
| addze $d2,$h2
|
| srdi $mask,$d2,2 # did it carry/borrow?
| neg $mask,$mask
|
| andc $h0,$h0,$mask
| and $d0,$d0,$mask
| andc $h1,$h1,$mask
| and $d1,$d1,$mask
| or $h0,$h0,$d0
| or $h1,$h1,$d1
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| rotldi $padbit,$padbit,32 # flip nonce words
| rotldi $nonce,$nonce,32
| ___
| $code.=<<___;
| addc $h0,$h0,$padbit # accumulate nonce
| adde $h1,$h1,$nonce
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| std $h0,0($mac) # write result
| std $h1,8($mac)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| extrdi r0,$h0,32,0
| li $d0,4
| stwbrx $h0,0,$mac # write result
| extrdi $h0,$h1,32,0
| li $d1,8
| stwbrx r0,$d0,$mac
| li $d2,12
| stwbrx $h1,$d1,$mac
| stwbrx $h0,$d2,$mac
| ___
| $code.=<<___;
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,3,0
| .size .poly1305_emit,.-.poly1305_emit
| ___
| } else {
| ###############################################################################
| # base 2^32 implementation
|
| my ($h0,$h1,$h2,$h3,$h4, $r0,$r1,$r2,$r3, $s1,$s2,$s3,
| $t0,$t1,$t2,$t3, $D0,$D1,$D2,$D3, $d0,$d1,$d2,$d3
| ) = map("r$_",(7..12,14..31));
|
| $code.=<<___;
| .globl .poly1305_init_int
| .align 4
| .poly1305_init_int:
| xor r0,r0,r0
| stw r0,0($ctx) # zero hash value
| stw r0,4($ctx)
| stw r0,8($ctx)
| stw r0,12($ctx)
| stw r0,16($ctx)
|
| $UCMP $inp,r0
| beq- Lno_key
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| lw $h0,0($inp) # load key material
| lw $h1,4($inp)
| lw $h2,8($inp)
| lw $h3,12($inp)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $h1,4
| lwbrx $h0,0,$inp # load key material
| li $h2,8
| lwbrx $h1,$h1,$inp
| li $h3,12
| lwbrx $h2,$h2,$inp
| lwbrx $h3,$h3,$inp
| ___
| $code.=<<___;
| lis $mask,0xf000 # 0xf0000000
| li $r0,-4
| andc $r0,$r0,$mask # 0x0ffffffc
|
| andc $h0,$h0,$mask
| and $h1,$h1,$r0
| and $h2,$h2,$r0
| and $h3,$h3,$r0
|
| stw $h0,32($ctx) # store key
| stw $h1,36($ctx)
| stw $h2,40($ctx)
| stw $h3,44($ctx)
|
| Lno_key:
| xor r3,r3,r3
| blr
| .long 0
| .byte 0,12,0x14,0,0,0,2,0
| .size .poly1305_init_int,.-.poly1305_init_int
|
| .globl .poly1305_blocks
| .align 4
| .poly1305_blocks:
| srwi. $len,$len,4
| beq- Labort
|
| $STU $sp,-$FRAME($sp)
| mflr r0
| $PUSH r14,`$FRAME-$SIZE_T*18`($sp)
| $PUSH r15,`$FRAME-$SIZE_T*17`($sp)
| $PUSH r16,`$FRAME-$SIZE_T*16`($sp)
| $PUSH r17,`$FRAME-$SIZE_T*15`($sp)
| $PUSH r18,`$FRAME-$SIZE_T*14`($sp)
| $PUSH r19,`$FRAME-$SIZE_T*13`($sp)
| $PUSH r20,`$FRAME-$SIZE_T*12`($sp)
| $PUSH r21,`$FRAME-$SIZE_T*11`($sp)
| $PUSH r22,`$FRAME-$SIZE_T*10`($sp)
| $PUSH r23,`$FRAME-$SIZE_T*9`($sp)
| $PUSH r24,`$FRAME-$SIZE_T*8`($sp)
| $PUSH r25,`$FRAME-$SIZE_T*7`($sp)
| $PUSH r26,`$FRAME-$SIZE_T*6`($sp)
| $PUSH r27,`$FRAME-$SIZE_T*5`($sp)
| $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
| $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
| $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
| $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
| $PUSH r0,`$FRAME+$LRSAVE`($sp)
|
| lwz $r0,32($ctx) # load key
| lwz $r1,36($ctx)
| lwz $r2,40($ctx)
| lwz $r3,44($ctx)
|
| lwz $h0,0($ctx) # load hash value
| lwz $h1,4($ctx)
| lwz $h2,8($ctx)
| lwz $h3,12($ctx)
| lwz $h4,16($ctx)
|
| srwi $s1,$r1,2
| srwi $s2,$r2,2
| srwi $s3,$r3,2
| add $s1,$s1,$r1 # si = ri + ri>>2
| add $s2,$s2,$r2
| add $s3,$s3,$r3
| mtctr $len
| li $mask,3
| b Loop
|
| .align 4
| Loop:
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| lwz $d0,0($inp) # load input
| lwz $d1,4($inp)
| lwz $d2,8($inp)
| lwz $d3,12($inp)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $d1,4
| lwbrx $d0,0,$inp # load input
| li $d2,8
| lwbrx $d1,$d1,$inp
| li $d3,12
| lwbrx $d2,$d2,$inp
| lwbrx $d3,$d3,$inp
| ___
| $code.=<<___;
| addi $inp,$inp,16
|
| addc $h0,$h0,$d0 # accumulate input
| adde $h1,$h1,$d1
| adde $h2,$h2,$d2
|
| mullw $d0,$h0,$r0 # h0*r0
| mulhwu $D0,$h0,$r0
|
| mullw $d1,$h0,$r1 # h0*r1
| mulhwu $D1,$h0,$r1
|
| mullw $d2,$h0,$r2 # h0*r2
| mulhwu $D2,$h0,$r2
|
| adde $h3,$h3,$d3
| adde $h4,$h4,$padbit
|
| mullw $d3,$h0,$r3 # h0*r3
| mulhwu $D3,$h0,$r3
|
| mullw $t0,$h1,$s3 # h1*s3
| mulhwu $t1,$h1,$s3
|
| mullw $t2,$h1,$r0 # h1*r0
| mulhwu $t3,$h1,$r0
| addc $d0,$d0,$t0
| adde $D0,$D0,$t1
|
| mullw $t0,$h1,$r1 # h1*r1
| mulhwu $t1,$h1,$r1
| addc $d1,$d1,$t2
| adde $D1,$D1,$t3
|
| mullw $t2,$h1,$r2 # h1*r2
| mulhwu $t3,$h1,$r2
| addc $d2,$d2,$t0
| adde $D2,$D2,$t1
|
| mullw $t0,$h2,$s2 # h2*s2
| mulhwu $t1,$h2,$s2
| addc $d3,$d3,$t2
| adde $D3,$D3,$t3
|
| mullw $t2,$h2,$s3 # h2*s3
| mulhwu $t3,$h2,$s3
| addc $d0,$d0,$t0
| adde $D0,$D0,$t1
|
| mullw $t0,$h2,$r0 # h2*r0
| mulhwu $t1,$h2,$r0
| addc $d1,$d1,$t2
| adde $D1,$D1,$t3
|
| mullw $t2,$h2,$r1 # h2*r1
| mulhwu $t3,$h2,$r1
| addc $d2,$d2,$t0
| adde $D2,$D2,$t1
|
| mullw $t0,$h3,$s1 # h3*s1
| mulhwu $t1,$h3,$s1
| addc $d3,$d3,$t2
| adde $D3,$D3,$t3
|
| mullw $t2,$h3,$s2 # h3*s2
| mulhwu $t3,$h3,$s2
| addc $d0,$d0,$t0
| adde $D0,$D0,$t1
|
| mullw $t0,$h3,$s3 # h3*s3
| mulhwu $t1,$h3,$s3
| addc $d1,$d1,$t2
| adde $D1,$D1,$t3
|
| mullw $t2,$h3,$r0 # h3*r0
| mulhwu $t3,$h3,$r0
| addc $d2,$d2,$t0
| adde $D2,$D2,$t1
|
| mullw $t0,$h4,$s1 # h4*s1
| addc $d3,$d3,$t2
| adde $D3,$D3,$t3
| addc $d1,$d1,$t0
|
| mullw $t1,$h4,$s2 # h4*s2
| addze $D1,$D1
| addc $d2,$d2,$t1
| addze $D2,$D2
|
| mullw $t2,$h4,$s3 # h4*s3
| addc $d3,$d3,$t2
| addze $D3,$D3
|
| mullw $h4,$h4,$r0 # h4*r0
|
| addc $h1,$d1,$D0
| adde $h2,$d2,$D1
| adde $h3,$d3,$D2
| adde $h4,$h4,$D3
|
| andc $D0,$h4,$mask # final reduction step
| and $h4,$h4,$mask
| srwi $D1,$D0,2
| add $D0,$D0,$D1
| addc $h0,$d0,$D0
| addze $h1,$h1
| addze $h2,$h2
| addze $h3,$h3
| addze $h4,$h4
|
| bdnz Loop
|
| stw $h0,0($ctx) # store hash value
| stw $h1,4($ctx)
| stw $h2,8($ctx)
| stw $h3,12($ctx)
| stw $h4,16($ctx)
|
| $POP r14,`$FRAME-$SIZE_T*18`($sp)
| $POP r15,`$FRAME-$SIZE_T*17`($sp)
| $POP r16,`$FRAME-$SIZE_T*16`($sp)
| $POP r17,`$FRAME-$SIZE_T*15`($sp)
| $POP r18,`$FRAME-$SIZE_T*14`($sp)
| $POP r19,`$FRAME-$SIZE_T*13`($sp)
| $POP r20,`$FRAME-$SIZE_T*12`($sp)
| $POP r21,`$FRAME-$SIZE_T*11`($sp)
| $POP r22,`$FRAME-$SIZE_T*10`($sp)
| $POP r23,`$FRAME-$SIZE_T*9`($sp)
| $POP r24,`$FRAME-$SIZE_T*8`($sp)
| $POP r25,`$FRAME-$SIZE_T*7`($sp)
| $POP r26,`$FRAME-$SIZE_T*6`($sp)
| $POP r27,`$FRAME-$SIZE_T*5`($sp)
| $POP r28,`$FRAME-$SIZE_T*4`($sp)
| $POP r29,`$FRAME-$SIZE_T*3`($sp)
| $POP r30,`$FRAME-$SIZE_T*2`($sp)
| $POP r31,`$FRAME-$SIZE_T*1`($sp)
| addi $sp,$sp,$FRAME
| Labort:
| blr
| .long 0
| .byte 0,12,4,1,0x80,18,4,0
| .size .poly1305_blocks,.-.poly1305_blocks
|
| .globl .poly1305_emit
| .align 4
| .poly1305_emit:
| $STU $sp,-$FRAME($sp)
| mflr r0
| $PUSH r28,`$FRAME-$SIZE_T*4`($sp)
| $PUSH r29,`$FRAME-$SIZE_T*3`($sp)
| $PUSH r30,`$FRAME-$SIZE_T*2`($sp)
| $PUSH r31,`$FRAME-$SIZE_T*1`($sp)
| $PUSH r0,`$FRAME+$LRSAVE`($sp)
|
| lwz $h0,0($ctx) # load hash
| lwz $h1,4($ctx)
| lwz $h2,8($ctx)
| lwz $h3,12($ctx)
| lwz $h4,16($ctx)
|
| addic $d0,$h0,5 # compare to modulus
| addze $d1,$h1
| addze $d2,$h2
| addze $d3,$h3
| addze $mask,$h4
|
| srwi $mask,$mask,2 # did it carry/borrow?
| neg $mask,$mask
|
| andc $h0,$h0,$mask
| and $d0,$d0,$mask
| andc $h1,$h1,$mask
| and $d1,$d1,$mask
| or $h0,$h0,$d0
| lwz $d0,0($nonce) # load nonce
| andc $h2,$h2,$mask
| and $d2,$d2,$mask
| or $h1,$h1,$d1
| lwz $d1,4($nonce)
| andc $h3,$h3,$mask
| and $d3,$d3,$mask
| or $h2,$h2,$d2
| lwz $d2,8($nonce)
| or $h3,$h3,$d3
| lwz $d3,12($nonce)
|
| addc $h0,$h0,$d0 # accumulate nonce
| adde $h1,$h1,$d1
| adde $h2,$h2,$d2
| adde $h3,$h3,$d3
| ___
| $code.=<<___ if ($LITTLE_ENDIAN);
| stw $h0,0($mac) # write result
| stw $h1,4($mac)
| stw $h2,8($mac)
| stw $h3,12($mac)
| ___
| $code.=<<___ if (!$LITTLE_ENDIAN);
| li $d1,4
| stwbrx $h0,0,$mac # write result
| li $d2,8
| stwbrx $h1,$d1,$mac
| li $d3,12
| stwbrx $h2,$d2,$mac
| stwbrx $h3,$d3,$mac
| ___
| $code.=<<___;
| $POP r28,`$FRAME-$SIZE_T*4`($sp)
| $POP r29,`$FRAME-$SIZE_T*3`($sp)
| $POP r30,`$FRAME-$SIZE_T*2`($sp)
| $POP r31,`$FRAME-$SIZE_T*1`($sp)
| addi $sp,$sp,$FRAME
| blr
| .long 0
| .byte 0,12,4,1,0x80,4,3,0
| .size .poly1305_emit,.-.poly1305_emit
| ___
| }
| $code.=<<___;
| .asciz "Poly1305 for PPC, CRYPTOGAMS by <appro\@openssl.org>"
| ___
|
| $code =~ s/\`([^\`]*)\`/eval $1/gem;
| print $code;
| close STDOUT or die "error closing STDOUT: $!";
|
|
