--- /dev/null
+#! /usr/bin/env perl
+# This file is dual-licensed, meaning that you can use it under your
+# choice of either of the following two licenses:
+#
+# Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License"). You can obtain
+# a copy in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+#
+# or
+#
+# Copyright (c) 2025, Julian Zhu <jz531210@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+use strict;
+use warnings;
+
+# $output is the last argument if it looks like a file (it has an extension)
+# $flavour is the first argument if it doesn't look like a file
+my $output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
+my $flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
+
+$output and open STDOUT,">$output";
+
+my $code=<<___;
+.text
+___
+
+my $K256 = "K256";
+
+# Function arguments
+my ($zero,$ra,$tp,$sp,$fp)=map("\$r$_",(0..3,22));
+my ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$r$_",(4..11));
+my ($t0,$t1,$t2,$t3,$t4,$t5,$t6,$t7,$t8,$x)=map("\$r$_",(12..21));
+my ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7,$s8)=map("\$r$_",(23..31));
+
+my ($INP, $LEN, $ADDR) = ($a1, $a2, $sp);
+my ($KT, $T1, $T2, $T3, $T4, $T5, $T6) = ($t0, $t1, $t2, $t3, $t4, $t5, $t6);
+my ($A, $B, $C, $D ,$E ,$F ,$G ,$H) = ($s0, $s1, $s2, $s3, $s4, $s5, $s6, $s7);
+
+sub MSGSCHEDULE0 {
+ my ($index) = @_;
+ my $code=<<___;
+ ld.w $T1, $INP, 4*$index
+ revb.2w $T1, $T1
+ st.w $T1, $ADDR, 4*$index
+___
+ return $code;
+}
+
+sub MSGSCHEDULE1 {
+ my ($index) = @_;
+ my $code=<<___;
+ ld.w $T1, $ADDR, (($index-2)&0x0f)*4
+ ld.w $T2, $ADDR, (($index-15)&0x0f)*4
+ ld.w $T3, $ADDR, (($index-7)&0x0f)*4
+ ld.w $T4, $ADDR, ($index&0x0f)*4
+ rotri.w $T5, $T1, 17
+ rotri.w $T6, $T1, 19
+ srli.w $T1, $T1, 10
+ xor $T1, $T1, $T5
+ xor $T1, $T1, $T6
+ add.w $T1, $T1, $T3
+ rotri.w $T5, $T2, 7
+ rotri.w $T6, $T2, 18
+ srli.w $T2, $T2, 3
+ xor $T2, $T2, $T5
+ xor $T2, $T2, $T6
+ add.w $T1, $T1, $T2
+ add.w $T1, $T1, $T4
+ st.w $T1, $ADDR, ($index&0x0f)*4
+___
+ return $code;
+}
+
+sub sha256_T1 {
+ my ($index, $e, $f, $g, $h) = @_;
+ my $code=<<___;
+ ld.w $T4, $KT, 4*$index
+ add.w $h, $h, $T1
+ add.w $h, $h, $T4
+ rotri.w $T2, $e, 6
+ rotri.w $T3, $e, 11
+ rotri.w $T4, $e, 25
+ xor $T2, $T2, $T3
+ xor $T1, $f, $g
+ xor $T2, $T2, $T4
+ and $T1, $T1, $e
+ add.w $h, $h, $T2
+ xor $T1, $T1, $g
+ add.w $T1, $T1, $h
+___
+ return $code;
+}
+
+sub sha256_T2 {
+ my ($a, $b, $c) = @_;
+ my $code=<<___;
+ rotri.w $T2, $a, 2
+ rotri.w $T3, $a, 13
+ rotri.w $T4, $a, 22
+ xor $T2, $T2, $T3
+ xor $T2, $T2, $T4
+ xor $T4, $b, $c
+ and $T3, $b, $c
+ and $T4, $T4, $a
+ xor $T4, $T4, $T3
+ add.w $T2, $T2, $T4
+___
+ return $code;
+}
+
+sub SHA256ROUND {
+ my ($index, $a, $b, $c, $d, $e, $f, $g, $h) = @_;
+ my $code=<<___;
+ @{[sha256_T1 $index, $e, $f, $g, $h]}
+ @{[sha256_T2 $a, $b, $c]}
+ add.w $d, $d, $T1
+ add.w $h, $T2, $T1
+___
+ return $code;
+}
+
+sub SHA256ROUND0 {
+ my ($index, $a, $b, $c, $d, $e, $f, $g, $h) = @_;
+ my $code=<<___;
+ @{[MSGSCHEDULE0 $index]}
+ @{[SHA256ROUND $index, $a, $b, $c, $d, $e, $f, $g, $h]}
+___
+ return $code;
+}
+
+sub SHA256ROUND1 {
+ my ($index, $a, $b, $c, $d, $e, $f, $g, $h) = @_;
+ my $code=<<___;
+ @{[MSGSCHEDULE1 $index]}
+ @{[SHA256ROUND $index, $a, $b, $c, $d, $e, $f, $g, $h]}
+___
+ return $code;
+}
+
+################################################################################
+# void sha256_block_data_order(void *c, const void *p, size_t len)
+$code .= <<___;
+.p2align 3
+.globl sha256_block_data_order
+.type sha256_block_data_order,\@function
+sha256_block_data_order:
+
+ addi.d $sp, $sp, -80
+
+ st.d $s0, $sp, 0
+ st.d $s1, $sp, 8
+ st.d $s2, $sp, 16
+ st.d $s3, $sp, 24
+ st.d $s4, $sp, 32
+ st.d $s5, $sp, 40
+ st.d $s6, $sp, 48
+ st.d $s7, $sp, 56
+ st.d $s8, $sp, 64
+ st.d $fp, $sp, 72
+
+ addi.d $sp, $sp, -64
+
+ la $KT, $K256
+
+ # load ctx
+ ld.w $A, $a0, 0
+ ld.w $B, $a0, 4
+ ld.w $C, $a0, 8
+ ld.w $D, $a0, 12
+ ld.w $E, $a0, 16
+ ld.w $F, $a0, 20
+ ld.w $G, $a0, 24
+ ld.w $H, $a0, 28
+
+L_round_loop:
+ # Decrement length by 1
+ addi.d $LEN, $LEN, -1
+
+ @{[SHA256ROUND0 0, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND0 1, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND0 2, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND0 3, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND0 4, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND0 5, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND0 6, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND0 7, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND0 8, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND0 9, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND0 10, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND0 11, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND0 12, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND0 13, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND0 14, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND0 15, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 16, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 17, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 18, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 19, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 20, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 21, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 22, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 23, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 24, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 25, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 26, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 27, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 28, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 29, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 30, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 31, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 32, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 33, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 34, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 35, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 36, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 37, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 38, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 39, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 40, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 41, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 42, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 43, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 44, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 45, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 46, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 47, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 48, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 49, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 50, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 51, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 52, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 53, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 54, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 55, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ @{[SHA256ROUND1 56, $A, $B, $C, $D, $E, $F, $G, $H]}
+ @{[SHA256ROUND1 57, $H, $A, $B, $C, $D, $E, $F, $G]}
+ @{[SHA256ROUND1 58, $G, $H, $A, $B, $C, $D, $E, $F]}
+ @{[SHA256ROUND1 59, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+ @{[SHA256ROUND1 60, $E, $F, $G, $H, $A, $B, $C, $D]}
+ @{[SHA256ROUND1 61, $D, $E, $F, $G, $H, $A, $B, $C]}
+ @{[SHA256ROUND1 62, $C, $D, $E, $F, $G, $H, $A, $B]}
+ @{[SHA256ROUND1 63, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+ ld.w $T1, $a0, 0
+ ld.w $T2, $a0, 4
+ ld.w $T3, $a0, 8
+ ld.w $T4, $a0, 12
+
+ add.w $A, $A, $T1
+ add.w $B, $B, $T2
+ add.w $C, $C, $T3
+ add.w $D, $D, $T4
+
+ st.w $A, $a0, 0
+ st.w $B, $a0, 4
+ st.w $C, $a0, 8
+ st.w $D, $a0, 12
+
+ ld.w $T1, $a0, 16
+ ld.w $T2, $a0, 20
+ ld.w $T3, $a0, 24
+ ld.w $T4, $a0, 28
+
+ add.w $E, $E, $T1
+ add.w $F, $F, $T2
+ add.w $G, $G, $T3
+ add.w $H, $H, $T4
+
+ st.w $E, $a0, 16
+ st.w $F, $a0, 20
+ st.w $G, $a0, 24
+ st.w $H, $a0, 28
+
+ addi.d $INP, $INP, 64
+
+ bnez $LEN, L_round_loop
+
+ addi.d $sp, $sp, 64
+
+ ld.d $s0, $sp, 0
+ ld.d $s1, $sp, 8
+ ld.d $s2, $sp, 16
+ ld.d $s3, $sp, 24
+ ld.d $s4, $sp, 32
+ ld.d $s5, $sp, 40
+ ld.d $s6, $sp, 48
+ ld.d $s7, $sp, 56
+ ld.d $s8, $sp, 64
+ ld.d $fp, $sp, 72
+
+ addi.d $sp, $sp, 80
+
+ ret
+.size sha256_block_data_order,.-sha256_block_data_order
+
+.section .rodata
+.p2align 3
+.type $K256,\@object
+$K256:
+ .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5
+ .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5
+ .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3
+ .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174
+ .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc
+ .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da
+ .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7
+ .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967
+ .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13
+ .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85
+ .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3
+ .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070
+ .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5
+ .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3
+ .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208
+ .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+.size $K256,.-$K256
+___
+
+print $code;
+
+close STDOUT or die "error closing STDOUT: $!";