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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/.
| # ====================================================================
|
| # Poly1305 hash for MIPS64.
| #
| # May 2016
| #
| # Numbers are cycles per processed byte with poly1305_blocks alone.
| #
| # IALU/gcc
| # R1x000 5.64/+120% (big-endian)
| # Octeon II 3.80/+280% (little-endian)
|
| ######################################################################
| # There is a number of MIPS ABI in use, O32 and N32/64 are most
| # widely used. Then there is a new contender: NUBI. It appears that if
| # one picks the latter, it's possible to arrange code in ABI neutral
| # manner. Therefore let's stick to NUBI register layout:
| #
| ($zero,$at,$t0,$t1,$t2)=map("\$$_",(0..2,24,25));
| ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
| ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7,$s8,$s9,$s10,$s11)=map("\$$_",(12..23));
| ($gp,$tp,$sp,$fp,$ra)=map("\$$_",(3,28..31));
| #
| # The return value is placed in $a0. Following coding rules facilitate
| # interoperability:
| #
| # - never ever touch $tp, "thread pointer", former $gp [o32 can be
| # excluded from the rule, because it's specified volatile];
| # - copy return value to $t0, former $v0 [or to $a0 if you're adapting
| # old code];
| # - on O32 populate $a4-$a7 with 'lw $aN,4*N($sp)' if necessary;
| #
| # For reference here is register layout for N32/64 MIPS ABIs:
| #
| # ($zero,$at,$v0,$v1)=map("\$$_",(0..3));
| # ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
| # ($t0,$t1,$t2,$t3,$t8,$t9)=map("\$$_",(12..15,24,25));
| # ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7)=map("\$$_",(16..23));
| # ($gp,$sp,$fp,$ra)=map("\$$_",(28..31));
| #
| # <appro@openssl.org>
| #
| ######################################################################
|
| $flavour = shift || "o32"; # supported flavours are o32,n32,64,nubi32,nubi64
|
| die "MIPS64 only" unless ($flavour =~ /64|n32/i);
|
| $v0 = ($flavour =~ /nubi/i) ? $a0 : $t0;
| $SAVED_REGS_MASK = ($flavour =~ /nubi/i) ? "0x0003f000" : "0x00030000";
|
| ($ctx,$inp,$len,$padbit) = ($a0,$a1,$a2,$a3);
| ($in0,$in1,$tmp0,$tmp1,$tmp2,$tmp3,$tmp4) = ($a4,$a5,$a6,$a7,$at,$t0,$t1);
|
| $code.=<<___;
| #include "mips_arch.h"
|
| #ifdef MIPSEB
| # define MSB 0
| # define LSB 7
| #else
| # define MSB 7
| # define LSB 0
| #endif
|
| .text
| .set noat
| .set noreorder
|
| .align 5
| .globl poly1305_init
| .ent poly1305_init
| poly1305_init:
| .frame $sp,0,$ra
| .set reorder
|
| sd $zero,0($ctx)
| sd $zero,8($ctx)
| sd $zero,16($ctx)
|
| beqz $inp,.Lno_key
|
| #if defined(_MIPS_ARCH_MIPS64R6)
| ld $in0,0($inp)
| ld $in1,8($inp)
| #else
| ldl $in0,0+MSB($inp)
| ldl $in1,8+MSB($inp)
| ldr $in0,0+LSB($inp)
| ldr $in1,8+LSB($inp)
| #endif
| #ifdef MIPSEB
| # if defined(_MIPS_ARCH_MIPS64R2)
| dsbh $in0,$in0 # byte swap
| dsbh $in1,$in1
| dshd $in0,$in0
| dshd $in1,$in1
| # else
| ori $tmp0,$zero,0xFF
| dsll $tmp2,$tmp0,32
| or $tmp0,$tmp2 # 0x000000FF000000FF
|
| and $tmp1,$in0,$tmp0 # byte swap
| and $tmp3,$in1,$tmp0
| dsrl $tmp2,$in0,24
| dsrl $tmp4,$in1,24
| dsll $tmp1,24
| dsll $tmp3,24
| and $tmp2,$tmp0
| and $tmp4,$tmp0
| dsll $tmp0,8 # 0x0000FF000000FF00
| or $tmp1,$tmp2
| or $tmp3,$tmp4
| and $tmp2,$in0,$tmp0
| and $tmp4,$in1,$tmp0
| dsrl $in0,8
| dsrl $in1,8
| dsll $tmp2,8
| dsll $tmp4,8
| and $in0,$tmp0
| and $in1,$tmp0
| or $tmp1,$tmp2
| or $tmp3,$tmp4
| or $in0,$tmp1
| or $in1,$tmp3
| dsrl $tmp1,$in0,32
| dsrl $tmp3,$in1,32
| dsll $in0,32
| dsll $in1,32
| or $in0,$tmp1
| or $in1,$tmp3
| # endif
| #endif
| li $tmp0,1
| dsll $tmp0,32
| daddiu $tmp0,-63
| dsll $tmp0,28
| daddiu $tmp0,-1 # 0ffffffc0fffffff
|
| and $in0,$tmp0
| daddiu $tmp0,-3 # 0ffffffc0ffffffc
| and $in1,$tmp0
|
| sd $in0,24($ctx)
| dsrl $tmp0,$in1,2
| sd $in1,32($ctx)
| daddu $tmp0,$in1 # s1 = r1 + (r1 >> 2)
| sd $tmp0,40($ctx)
|
| .Lno_key:
| li $v0,0 # return 0
| jr $ra
| .end poly1305_init
| ___
| {
| my ($h0,$h1,$h2,$r0,$r1,$s1,$d0,$d1,$d2) =
| ($s0,$s1,$s2,$s3,$s4,$s5,$in0,$in1,$t2);
|
| $code.=<<___;
| .align 5
| .globl poly1305_blocks
| .ent poly1305_blocks
| poly1305_blocks:
| .set noreorder
| dsrl $len,4 # number of complete blocks
| bnez $len,poly1305_blocks_internal
| nop
| jr $ra
| nop
| .end poly1305_blocks
|
| .align 5
| .ent poly1305_blocks_internal
| poly1305_blocks_internal:
| .frame $sp,6*8,$ra
| .mask $SAVED_REGS_MASK,-8
| .set noreorder
| dsubu $sp,6*8
| sd $s5,40($sp)
| sd $s4,32($sp)
| ___
| $code.=<<___ if ($flavour =~ /nubi/i); # optimize non-nubi prologue
| sd $s3,24($sp)
| sd $s2,16($sp)
| sd $s1,8($sp)
| sd $s0,0($sp)
| ___
| $code.=<<___;
| .set reorder
|
| ld $h0,0($ctx) # load hash value
| ld $h1,8($ctx)
| ld $h2,16($ctx)
|
| ld $r0,24($ctx) # load key
| ld $r1,32($ctx)
| ld $s1,40($ctx)
|
| .Loop:
| #if defined(_MIPS_ARCH_MIPS64R6)
| ld $in0,0($inp) # load input
| ld $in1,8($inp)
| #else
| ldl $in0,0+MSB($inp) # load input
| ldl $in1,8+MSB($inp)
| ldr $in0,0+LSB($inp)
| ldr $in1,8+LSB($inp)
| #endif
| daddiu $len,-1
| daddiu $inp,16
| #ifdef MIPSEB
| # if defined(_MIPS_ARCH_MIPS64R2)
| dsbh $in0,$in0 # byte swap
| dsbh $in1,$in1
| dshd $in0,$in0
| dshd $in1,$in1
| # else
| ori $tmp0,$zero,0xFF
| dsll $tmp2,$tmp0,32
| or $tmp0,$tmp2 # 0x000000FF000000FF
|
| and $tmp1,$in0,$tmp0 # byte swap
| and $tmp3,$in1,$tmp0
| dsrl $tmp2,$in0,24
| dsrl $tmp4,$in1,24
| dsll $tmp1,24
| dsll $tmp3,24
| and $tmp2,$tmp0
| and $tmp4,$tmp0
| dsll $tmp0,8 # 0x0000FF000000FF00
| or $tmp1,$tmp2
| or $tmp3,$tmp4
| and $tmp2,$in0,$tmp0
| and $tmp4,$in1,$tmp0
| dsrl $in0,8
| dsrl $in1,8
| dsll $tmp2,8
| dsll $tmp4,8
| and $in0,$tmp0
| and $in1,$tmp0
| or $tmp1,$tmp2
| or $tmp3,$tmp4
| or $in0,$tmp1
| or $in1,$tmp3
| dsrl $tmp1,$in0,32
| dsrl $tmp3,$in1,32
| dsll $in0,32
| dsll $in1,32
| or $in0,$tmp1
| or $in1,$tmp3
| # endif
| #endif
| daddu $h0,$in0 # accumulate input
| daddu $h1,$in1
| sltu $tmp0,$h0,$in0
| sltu $tmp1,$h1,$in1
| daddu $h1,$tmp0
|
| dmultu ($r0,$h0) # h0*r0
| daddu $h2,$padbit
| sltu $tmp0,$h1,$tmp0
| mflo ($d0,$r0,$h0)
| mfhi ($d1,$r0,$h0)
|
| dmultu ($s1,$h1) # h1*5*r1
| daddu $tmp0,$tmp1
| daddu $h2,$tmp0
| mflo ($tmp0,$s1,$h1)
| mfhi ($tmp1,$s1,$h1)
|
| dmultu ($r1,$h0) # h0*r1
| daddu $d0,$tmp0
| daddu $d1,$tmp1
| mflo ($tmp2,$r1,$h0)
| mfhi ($d2,$r1,$h0)
| sltu $tmp0,$d0,$tmp0
| daddu $d1,$tmp0
|
| dmultu ($r0,$h1) # h1*r0
| daddu $d1,$tmp2
| sltu $tmp2,$d1,$tmp2
| mflo ($tmp0,$r0,$h1)
| mfhi ($tmp1,$r0,$h1)
| daddu $d2,$tmp2
|
| dmultu ($s1,$h2) # h2*5*r1
| daddu $d1,$tmp0
| daddu $d2,$tmp1
| mflo ($tmp2,$s1,$h2)
|
| dmultu ($r0,$h2) # h2*r0
| sltu $tmp0,$d1,$tmp0
| daddu $d2,$tmp0
| mflo ($tmp3,$r0,$h2)
|
| daddu $d1,$tmp2
| daddu $d2,$tmp3
| sltu $tmp2,$d1,$tmp2
| daddu $d2,$tmp2
|
| li $tmp0,-4 # final reduction
| and $tmp0,$d2
| dsrl $tmp1,$d2,2
| andi $h2,$d2,3
| daddu $tmp0,$tmp1
| daddu $h0,$d0,$tmp0
| sltu $tmp0,$h0,$tmp0
| daddu $h1,$d1,$tmp0
| sltu $tmp0,$h1,$tmp0
| daddu $h2,$h2,$tmp0
|
| bnez $len,.Loop
|
| sd $h0,0($ctx) # store hash value
| sd $h1,8($ctx)
| sd $h2,16($ctx)
|
| .set noreorder
| ld $s5,40($sp) # epilogue
| ld $s4,32($sp)
| ___
| $code.=<<___ if ($flavour =~ /nubi/i); # optimize non-nubi epilogue
| ld $s3,24($sp)
| ld $s2,16($sp)
| ld $s1,8($sp)
| ld $s0,0($sp)
| ___
| $code.=<<___;
| jr $ra
| daddu $sp,6*8
| .end poly1305_blocks_internal
| ___
| }
| {
| my ($ctx,$mac,$nonce) = ($a0,$a1,$a2);
|
| $code.=<<___;
| .align 5
| .globl poly1305_emit
| .ent poly1305_emit
| poly1305_emit:
| .frame $sp,0,$ra
| .set reorder
|
| ld $tmp0,0($ctx)
| ld $tmp1,8($ctx)
| ld $tmp2,16($ctx)
|
| daddiu $in0,$tmp0,5 # compare to modulus
| sltiu $tmp3,$in0,5
| daddu $in1,$tmp1,$tmp3
| sltu $tmp3,$in1,$tmp3
| daddu $tmp2,$tmp2,$tmp3
|
| dsrl $tmp2,2 # see if it carried/borrowed
| dsubu $tmp2,$zero,$tmp2
| nor $tmp3,$zero,$tmp2
|
| and $in0,$tmp2
| and $tmp0,$tmp3
| and $in1,$tmp2
| and $tmp1,$tmp3
| or $in0,$tmp0
| or $in1,$tmp1
|
| lwu $tmp0,0($nonce) # load nonce
| lwu $tmp1,4($nonce)
| lwu $tmp2,8($nonce)
| lwu $tmp3,12($nonce)
| dsll $tmp1,32
| dsll $tmp3,32
| or $tmp0,$tmp1
| or $tmp2,$tmp3
|
| daddu $in0,$tmp0 # accumulate nonce
| daddu $in1,$tmp2
| sltu $tmp0,$in0,$tmp0
| daddu $in1,$tmp0
|
| dsrl $tmp0,$in0,8 # write mac value
| dsrl $tmp1,$in0,16
| dsrl $tmp2,$in0,24
| sb $in0,0($mac)
| dsrl $tmp3,$in0,32
| sb $tmp0,1($mac)
| dsrl $tmp0,$in0,40
| sb $tmp1,2($mac)
| dsrl $tmp1,$in0,48
| sb $tmp2,3($mac)
| dsrl $tmp2,$in0,56
| sb $tmp3,4($mac)
| dsrl $tmp3,$in1,8
| sb $tmp0,5($mac)
| dsrl $tmp0,$in1,16
| sb $tmp1,6($mac)
| dsrl $tmp1,$in1,24
| sb $tmp2,7($mac)
|
| sb $in1,8($mac)
| dsrl $tmp2,$in1,32
| sb $tmp3,9($mac)
| dsrl $tmp3,$in1,40
| sb $tmp0,10($mac)
| dsrl $tmp0,$in1,48
| sb $tmp1,11($mac)
| dsrl $tmp1,$in1,56
| sb $tmp2,12($mac)
| sb $tmp3,13($mac)
| sb $tmp0,14($mac)
| sb $tmp1,15($mac)
|
| jr $ra
| .end poly1305_emit
| .rdata
| .asciiz "Poly1305 for MIPS64, CRYPTOGAMS by <appro\@openssl.org>"
| .align 2
| ___
| }
|
| $output=pop and open STDOUT,">$output";
| print $code;
| close STDOUT or die "error closing STDOUT: $!";
|
|
