--- /dev/null
+#!/usr/bin/env perl
+#
+# ====================================================================
+# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
+# project.
+#
+# Rights for redistribution and usage in source and binary forms are
+# granted according to the OpenSSL license. Warranty of any kind is
+# disclaimed.
+# ====================================================================
+
+
+# July 1999
+#
+# This is drop-in MIPS III/IV ISA replacement for crypto/bn/bn_asm.c.
+#
+# The module is designed to work with either of the "new" MIPS ABI(5),
+# namely N32 or N64, offered by IRIX 6.x. It's not ment to work under
+# IRIX 5.x not only because it doesn't support new ABIs but also
+# because 5.x kernels put R4x00 CPU into 32-bit mode and all those
+# 64-bit instructions (daddu, dmultu, etc.) found below gonna only
+# cause illegal instruction exception:-(
+#
+# In addition the code depends on preprocessor flags set up by MIPSpro
+# compiler driver (either as or cc) and therefore (probably?) can't be
+# compiled by the GNU assembler. GNU C driver manages fine though...
+# I mean as long as -mmips-as is specified or is the default option,
+# because then it simply invokes /usr/bin/as which in turn takes
+# perfect care of the preprocessor definitions. Another neat feature
+# offered by the MIPSpro assembler is an optimization pass. This gave
+# me the opportunity to have the code looking more regular as all those
+# architecture dependent instruction rescheduling details were left to
+# the assembler. Cool, huh?
+#
+# Performance improvement is astonishing! 'apps/openssl speed rsa dsa'
+# goes way over 3 times faster!
+#
+# <appro@fy.chalmers.se>
+
+# October 2010
+#
+# Adapt the module even for 32-bit ABIs and other OSes. The former was
+# achieved by mechanical replacement of 64-bit arithmetic instructions
+# such as dmultu, daddu, etc. with their 32-bit counterparts and
+# adjusting offsets denoting multiples of BN_ULONG. Above mentioned
+# >3x performance improvement naturally does not apply to 32-bit code
+# [because there is no instruction 32-bit compiler can't use], one
+# has to content with 40-85% improvement depending on benchmark and
+# key length, more for longer keys.
+
+$flavour = shift;
+
+if ($flavour =~ /64|n32/i) {
+ $LD="ld";
+ $ST="sd";
+ $MULTU="dmultu";
+ $DIVU="ddivu";
+ $ADDU="daddu";
+ $SUBU="dsubu";
+ $SRL="dsrl";
+ $SLL="dsll";
+ $BNSZ=8;
+ $PTR_ADD="daddu";
+ $PTR_SUB="dsubu";
+ $SZREG=8;
+ $REG_S="sd";
+ $REG_L="ld";
+} else {
+ $LD="lw";
+ $ST="sw";
+ $MULTU="multu";
+ $DIVU="divu";
+ $ADDU="addu";
+ $SUBU="subu";
+ $SRL="srl";
+ $SLL="sll";
+ $BNSZ=4;
+ $PTR_ADD="addu";
+ $PTR_SUB="subu";
+ $SZREG=4;
+ $REG_S="sw";
+ $REG_L="lw";
+ $code=".set mips2\n";
+}
+
+# Below is N32/64 register layout used in the original module.
+#
+($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));
+($ta0,$ta1,$ta2,$ta3)=($a4,$a5,$a6,$a7);
+#
+# No special adaptation is required for O32. NUBI on the other hand
+# is treated by saving/restoring ($v1,$t0..$t3).
+
+$gp=$v1 if ($flavour =~ /nubi/i);
+
+$minus4=$v1;
+
+$code.=<<___;
+.rdata
+.asciiz "mips3.s, Version 1.2"
+.asciiz "MIPS II/III/IV ISA artwork by Andy Polyakov <appro\@fy.chalmers.se>"
+
+.text
+.set noat
+
+.align 5
+.globl bn_mul_add_words
+.ent bn_mul_add_words
+bn_mul_add_words:
+ .set noreorder
+ bgtz $a2,bn_mul_add_words_internal
+ move $v0,$zero
+ jr $ra
+ move $a0,$v0
+.end bn_mul_add_words
+
+.align 5
+.ent bn_mul_add_words_internal
+bn_mul_add_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ li $minus4,-4
+ and $ta0,$a2,$minus4
+ $LD $t0,0($a1)
+ beqz $ta0,.L_bn_mul_add_words_tail
+
+.L_bn_mul_add_words_loop:
+ $MULTU $t0,$a3
+ $LD $t1,0($a0)
+ $LD $t2,$BNSZ($a1)
+ $LD $t3,$BNSZ($a0)
+ $LD $ta0,2*$BNSZ($a1)
+ $LD $ta1,2*$BNSZ($a0)
+ $ADDU $t1,$v0
+ sltu $v0,$t1,$v0 # All manuals say it "compares 32-bit
+ # values", but it seems to work fine
+ # even on 64-bit registers.
+ mflo $at
+ mfhi $t0
+ $ADDU $t1,$at
+ $ADDU $v0,$t0
+ $MULTU $t2,$a3
+ sltu $at,$t1,$at
+ $ST $t1,0($a0)
+ $ADDU $v0,$at
+
+ $LD $ta2,3*$BNSZ($a1)
+ $LD $ta3,3*$BNSZ($a0)
+ $ADDU $t3,$v0
+ sltu $v0,$t3,$v0
+ mflo $at
+ mfhi $t2
+ $ADDU $t3,$at
+ $ADDU $v0,$t2
+ $MULTU $ta0,$a3
+ sltu $at,$t3,$at
+ $ST $t3,$BNSZ($a0)
+ $ADDU $v0,$at
+
+ subu $a2,4
+ $PTR_ADD $a0,4*$BNSZ
+ $PTR_ADD $a1,4*$BNSZ
+ $ADDU $ta1,$v0
+ sltu $v0,$ta1,$v0
+ mflo $at
+ mfhi $ta0
+ $ADDU $ta1,$at
+ $ADDU $v0,$ta0
+ $MULTU $ta2,$a3
+ sltu $at,$ta1,$at
+ $ST $ta1,-2*$BNSZ($a0)
+ $ADDU $v0,$at
+
+
+ and $ta0,$a2,$minus4
+ $ADDU $ta3,$v0
+ sltu $v0,$ta3,$v0
+ mflo $at
+ mfhi $ta2
+ $ADDU $ta3,$at
+ $ADDU $v0,$ta2
+ sltu $at,$ta3,$at
+ $ST $ta3,-$BNSZ($a0)
+ $ADDU $v0,$at
+ .set noreorder
+ bgtzl $ta0,.L_bn_mul_add_words_loop
+ $LD $t0,0($a1)
+
+ beqz $a2,.L_bn_mul_add_words_return
+ nop
+
+.L_bn_mul_add_words_tail:
+ .set reorder
+ $LD $t0,0($a1)
+ $MULTU $t0,$a3
+ $LD $t1,0($a0)
+ subu $a2,1
+ $ADDU $t1,$v0
+ sltu $v0,$t1,$v0
+ mflo $at
+ mfhi $t0
+ $ADDU $t1,$at
+ $ADDU $v0,$t0
+ sltu $at,$t1,$at
+ $ST $t1,0($a0)
+ $ADDU $v0,$at
+ beqz $a2,.L_bn_mul_add_words_return
+
+ $LD $t0,$BNSZ($a1)
+ $MULTU $t0,$a3
+ $LD $t1,$BNSZ($a0)
+ subu $a2,1
+ $ADDU $t1,$v0
+ sltu $v0,$t1,$v0
+ mflo $at
+ mfhi $t0
+ $ADDU $t1,$at
+ $ADDU $v0,$t0
+ sltu $at,$t1,$at
+ $ST $t1,$BNSZ($a0)
+ $ADDU $v0,$at
+ beqz $a2,.L_bn_mul_add_words_return
+
+ $LD $t0,2*$BNSZ($a1)
+ $MULTU $t0,$a3
+ $LD $t1,2*$BNSZ($a0)
+ $ADDU $t1,$v0
+ sltu $v0,$t1,$v0
+ mflo $at
+ mfhi $t0
+ $ADDU $t1,$at
+ $ADDU $v0,$t0
+ sltu $at,$t1,$at
+ $ST $t1,2*$BNSZ($a0)
+ $ADDU $v0,$at
+
+.L_bn_mul_add_words_return:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+.end bn_mul_add_words
+
+.align 5
+.globl bn_mul_words
+.ent bn_mul_words
+bn_mul_words:
+ .set noreorder
+ bgtz $a2,bn_mul_words_internal
+ move $v0,$zero
+ jr $ra
+ move $a0,$v0
+.end bn_mul_words
+
+.align 5
+.ent bn_mul_words_internal
+bn_mul_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ li $minus4,-4
+ and $ta0,$a2,$minus4
+ $LD $t0,0($a1)
+ beqz $ta0,.L_bn_mul_words_tail
+
+.L_bn_mul_words_loop:
+ $MULTU $t0,$a3
+ $LD $t2,$BNSZ($a1)
+ $LD $ta0,2*$BNSZ($a1)
+ $LD $ta2,3*$BNSZ($a1)
+ mflo $at
+ mfhi $t0
+ $ADDU $v0,$at
+ sltu $t1,$v0,$at
+ $MULTU $t2,$a3
+ $ST $v0,0($a0)
+ $ADDU $v0,$t1,$t0
+
+ subu $a2,4
+ $PTR_ADD $a0,4*$BNSZ
+ $PTR_ADD $a1,4*$BNSZ
+ mflo $at
+ mfhi $t2
+ $ADDU $v0,$at
+ sltu $t3,$v0,$at
+ $MULTU $ta0,$a3
+ $ST $v0,-3*$BNSZ($a0)
+ $ADDU $v0,$t3,$t2
+
+ mflo $at
+ mfhi $ta0
+ $ADDU $v0,$at
+ sltu $ta1,$v0,$at
+ $MULTU $ta2,$a3
+ $ST $v0,-2*$BNSZ($a0)
+ $ADDU $v0,$ta1,$ta0
+
+ and $ta0,$a2,$minus4
+ mflo $at
+ mfhi $ta2
+ $ADDU $v0,$at
+ sltu $ta3,$v0,$at
+ $ST $v0,-$BNSZ($a0)
+ $ADDU $v0,$ta3,$ta2
+ .set noreorder
+ bgtzl $ta0,.L_bn_mul_words_loop
+ $LD $t0,0($a1)
+
+ beqz $a2,.L_bn_mul_words_return
+ nop
+
+.L_bn_mul_words_tail:
+ .set reorder
+ $LD $t0,0($a1)
+ $MULTU $t0,$a3
+ subu $a2,1
+ mflo $at
+ mfhi $t0
+ $ADDU $v0,$at
+ sltu $t1,$v0,$at
+ $ST $v0,0($a0)
+ $ADDU $v0,$t1,$t0
+ beqz $a2,.L_bn_mul_words_return
+
+ $LD $t0,$BNSZ($a1)
+ $MULTU $t0,$a3
+ subu $a2,1
+ mflo $at
+ mfhi $t0
+ $ADDU $v0,$at
+ sltu $t1,$v0,$at
+ $ST $v0,$BNSZ($a0)
+ $ADDU $v0,$t1,$t0
+ beqz $a2,.L_bn_mul_words_return
+
+ $LD $t0,2*$BNSZ($a1)
+ $MULTU $t0,$a3
+ mflo $at
+ mfhi $t0
+ $ADDU $v0,$at
+ sltu $t1,$v0,$at
+ $ST $v0,2*$BNSZ($a0)
+ $ADDU $v0,$t1,$t0
+
+.L_bn_mul_words_return:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+.end bn_mul_words_internal
+
+.align 5
+.globl bn_sqr_words
+.ent bn_sqr_words
+bn_sqr_words:
+ .set noreorder
+ bgtz $a2,bn_sqr_words_internal
+ move $v0,$zero
+ jr $ra
+ move $a0,$v0
+.end bn_sqr_words
+
+.align 5
+.ent bn_sqr_words_internal
+bn_sqr_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ li $minus4,-4
+ and $ta0,$a2,$minus4
+ $LD $t0,0($a1)
+ beqz $ta0,.L_bn_sqr_words_tail
+
+.L_bn_sqr_words_loop:
+ $MULTU $t0,$t0
+ $LD $t2,$BNSZ($a1)
+ $LD $ta0,2*$BNSZ($a1)
+ $LD $ta2,3*$BNSZ($a1)
+ mflo $t1
+ mfhi $t0
+ $ST $t1,0($a0)
+ $ST $t0,$BNSZ($a0)
+
+ $MULTU $t2,$t2
+ subu $a2,4
+ $PTR_ADD $a0,8*$BNSZ
+ $PTR_ADD $a1,4*$BNSZ
+ mflo $t3
+ mfhi $t2
+ $ST $t3,-6*$BNSZ($a0)
+ $ST $t2,-5*$BNSZ($a0)
+
+ $MULTU $ta0,$ta0
+ mflo $ta1
+ mfhi $ta0
+ $ST $ta1,-4*$BNSZ($a0)
+ $ST $ta0,-3*$BNSZ($a0)
+
+
+ $MULTU $ta2,$ta2
+ and $ta0,$a2,$minus4
+ mflo $ta3
+ mfhi $ta2
+ $ST $ta3,-2*$BNSZ($a0)
+ $ST $ta2,-$BNSZ($a0)
+
+ .set noreorder
+ bgtzl $ta0,.L_bn_sqr_words_loop
+ $LD $t0,0($a1)
+
+ beqz $a2,.L_bn_sqr_words_return
+ nop
+
+.L_bn_sqr_words_tail:
+ .set reorder
+ $LD $t0,0($a1)
+ $MULTU $t0,$t0
+ subu $a2,1
+ mflo $t1
+ mfhi $t0
+ $ST $t1,0($a0)
+ $ST $t0,$BNSZ($a0)
+ beqz $a2,.L_bn_sqr_words_return
+
+ $LD $t0,$BNSZ($a1)
+ $MULTU $t0,$t0
+ subu $a2,1
+ mflo $t1
+ mfhi $t0
+ $ST $t1,2*$BNSZ($a0)
+ $ST $t0,3*$BNSZ($a0)
+ beqz $a2,.L_bn_sqr_words_return
+
+ $LD $t0,2*$BNSZ($a1)
+ $MULTU $t0,$t0
+ mflo $t1
+ mfhi $t0
+ $ST $t1,4*$BNSZ($a0)
+ $ST $t0,5*$BNSZ($a0)
+
+.L_bn_sqr_words_return:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+
+.end bn_sqr_words_internal
+
+.align 5
+.globl bn_add_words
+.ent bn_add_words
+bn_add_words:
+ .set noreorder
+ bgtz $a3,bn_add_words_internal
+ move $v0,$zero
+ jr $ra
+ move $a0,$v0
+.end bn_add_words
+
+.align 5
+.ent bn_add_words_internal
+bn_add_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ li $minus4,-4
+ and $at,$a3,$minus4
+ $LD $t0,0($a1)
+ beqz $at,.L_bn_add_words_tail
+
+.L_bn_add_words_loop:
+ $LD $ta0,0($a2)
+ subu $a3,4
+ $LD $t1,$BNSZ($a1)
+ and $at,$a3,$minus4
+ $LD $t2,2*$BNSZ($a1)
+ $PTR_ADD $a2,4*$BNSZ
+ $LD $t3,3*$BNSZ($a1)
+ $PTR_ADD $a0,4*$BNSZ
+ $LD $ta1,-3*$BNSZ($a2)
+ $PTR_ADD $a1,4*$BNSZ
+ $LD $ta2,-2*$BNSZ($a2)
+ $LD $ta3,-$BNSZ($a2)
+ $ADDU $ta0,$t0
+ sltu $t8,$ta0,$t0
+ $ADDU $t0,$ta0,$v0
+ sltu $v0,$t0,$ta0
+ $ST $t0,-4*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+ $ADDU $ta1,$t1
+ sltu $t9,$ta1,$t1
+ $ADDU $t1,$ta1,$v0
+ sltu $v0,$t1,$ta1
+ $ST $t1,-3*$BNSZ($a0)
+ $ADDU $v0,$t9
+
+ $ADDU $ta2,$t2
+ sltu $t8,$ta2,$t2
+ $ADDU $t2,$ta2,$v0
+ sltu $v0,$t2,$ta2
+ $ST $t2,-2*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+ $ADDU $ta3,$t3
+ sltu $t9,$ta3,$t3
+ $ADDU $t3,$ta3,$v0
+ sltu $v0,$t3,$ta3
+ $ST $t3,-$BNSZ($a0)
+ $ADDU $v0,$t9
+
+ .set noreorder
+ bgtzl $at,.L_bn_add_words_loop
+ $LD $t0,0($a1)
+
+ beqz $a3,.L_bn_add_words_return
+ nop
+
+.L_bn_add_words_tail:
+ .set reorder
+ $LD $t0,0($a1)
+ $LD $ta0,0($a2)
+ $ADDU $ta0,$t0
+ subu $a3,1
+ sltu $t8,$ta0,$t0
+ $ADDU $t0,$ta0,$v0
+ sltu $v0,$t0,$ta0
+ $ST $t0,0($a0)
+ $ADDU $v0,$t8
+ beqz $a3,.L_bn_add_words_return
+
+ $LD $t1,$BNSZ($a1)
+ $LD $ta1,$BNSZ($a2)
+ $ADDU $ta1,$t1
+ subu $a3,1
+ sltu $t9,$ta1,$t1
+ $ADDU $t1,$ta1,$v0
+ sltu $v0,$t1,$ta1
+ $ST $t1,$BNSZ($a0)
+ $ADDU $v0,$t9
+ beqz $a3,.L_bn_add_words_return
+
+ $LD $t2,2*$BNSZ($a1)
+ $LD $ta2,2*$BNSZ($a2)
+ $ADDU $ta2,$t2
+ sltu $t8,$ta2,$t2
+ $ADDU $t2,$ta2,$v0
+ sltu $v0,$t2,$ta2
+ $ST $t2,2*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+.L_bn_add_words_return:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+
+.end bn_add_words_internal
+
+.align 5
+.globl bn_sub_words
+.ent bn_sub_words
+bn_sub_words:
+ .set noreorder
+ bgtz $a3,bn_sub_words_internal
+ move $v0,$zero
+ jr $ra
+ move $a0,$zero
+.end bn_sub_words
+
+.align 5
+.ent bn_sub_words_internal
+bn_sub_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ li $minus4,-4
+ and $at,$a3,$minus4
+ $LD $t0,0($a1)
+ beqz $at,.L_bn_sub_words_tail
+
+.L_bn_sub_words_loop:
+ $LD $ta0,0($a2)
+ subu $a3,4
+ $LD $t1,$BNSZ($a1)
+ and $at,$a3,$minus4
+ $LD $t2,2*$BNSZ($a1)
+ $PTR_ADD $a2,4*$BNSZ
+ $LD $t3,3*$BNSZ($a1)
+ $PTR_ADD $a0,4*$BNSZ
+ $LD $ta1,-3*$BNSZ($a2)
+ $PTR_ADD $a1,4*$BNSZ
+ $LD $ta2,-2*$BNSZ($a2)
+ $LD $ta3,-$BNSZ($a2)
+ sltu $t8,$t0,$ta0
+ $SUBU $ta0,$t0,$ta0
+ $SUBU $t0,$ta0,$v0
+ sgtu $v0,$t0,$ta0
+ $ST $t0,-4*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+ sltu $t9,$t1,$ta1
+ $SUBU $ta1,$t1,$ta1
+ $SUBU $t1,$ta1,$v0
+ sgtu $v0,$t1,$ta1
+ $ST $t1,-3*$BNSZ($a0)
+ $ADDU $v0,$t9
+
+
+ sltu $t8,$t2,$ta2
+ $SUBU $ta2,$t2,$ta2
+ $SUBU $t2,$ta2,$v0
+ sgtu $v0,$t2,$ta2
+ $ST $t2,-2*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+ sltu $t9,$t3,$ta3
+ $SUBU $ta3,$t3,$ta3
+ $SUBU $t3,$ta3,$v0
+ sgtu $v0,$t3,$ta3
+ $ST $t3,-$BNSZ($a0)
+ $ADDU $v0,$t9
+
+ .set noreorder
+ bgtzl $at,.L_bn_sub_words_loop
+ $LD $t0,0($a1)
+
+ beqz $a3,.L_bn_sub_words_return
+ nop
+
+.L_bn_sub_words_tail:
+ .set reorder
+ $LD $t0,0($a1)
+ $LD $ta0,0($a2)
+ subu $a3,1
+ sltu $t8,$t0,$ta0
+ $SUBU $ta0,$t0,$ta0
+ $SUBU $t0,$ta0,$v0
+ sgtu $v0,$t0,$ta0
+ $ST $t0,0($a0)
+ $ADDU $v0,$t8
+ beqz $a3,.L_bn_sub_words_return
+
+ $LD $t1,$BNSZ($a1)
+ subu $a3,1
+ $LD $ta1,$BNSZ($a2)
+ sltu $t9,$t1,$ta1
+ $SUBU $ta1,$t1,$ta1
+ $SUBU $t1,$ta1,$v0
+ sgtu $v0,$t1,$ta1
+ $ST $t1,$BNSZ($a0)
+ $ADDU $v0,$t9
+ beqz $a3,.L_bn_sub_words_return
+
+ $LD $t2,2*$BNSZ($a1)
+ $LD $ta2,2*$BNSZ($a2)
+ sltu $t8,$t2,$ta2
+ $SUBU $ta2,$t2,$ta2
+ $SUBU $t2,$ta2,$v0
+ sgtu $v0,$t2,$ta2
+ $ST $t2,2*$BNSZ($a0)
+ $ADDU $v0,$t8
+
+.L_bn_sub_words_return:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+.end bn_sub_words
+
+.align 5
+.globl bn_div_3_words
+.ent bn_div_3_words
+bn_div_3_words:
+ .set noreorder
+ move $a3,$a0 # we know that bn_div_words does not
+ # touch $a3, $ta2, $ta3 and preserves $a2
+ # so that we can save two arguments
+ # and return address in registers
+ # instead of stack:-)
+
+ $LD $a0,($a3)
+ move $ta2,$a1
+ bne $a0,$a2,bn_div_3_words_internal
+ $LD $a1,-$BNSZ($a3)
+ li $v0,-1
+ jr $ra
+ move $a0,$v0
+.end bn_div_3_words
+
+.align 5
+.ent bn_div_3_words_internal
+bn_div_3_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ move $ta3,$ra
+ bal bn_div_words
+ move $ra,$ta3
+ $MULTU $ta2,$v0
+ $LD $t2,-2*$BNSZ($a3)
+ move $ta0,$zero
+ mfhi $t1
+ mflo $t0
+ sltu $t8,$t1,$a1
+.L_bn_div_3_words_inner_loop:
+ bnez $t8,.L_bn_div_3_words_inner_loop_done
+ sgeu $at,$t2,$t0
+ seq $t9,$t1,$a1
+ and $at,$t9
+ sltu $t3,$t0,$ta2
+ $ADDU $a1,$a2
+ $SUBU $t1,$t3
+ $SUBU $t0,$ta2
+ sltu $t8,$t1,$a1
+ sltu $ta0,$a1,$a2
+ or $t8,$ta0
+ .set noreorder
+ beqzl $at,.L_bn_div_3_words_inner_loop
+ $SUBU $v0,1
+ .set reorder
+.L_bn_div_3_words_inner_loop_done:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+.end bn_div_3_words_internal
+
+.align 5
+.globl bn_div_words
+.ent bn_div_words
+bn_div_words:
+ .set noreorder
+ bnez $a2,bn_div_words_internal
+ li $v0,-1 # I would rather signal div-by-zero
+ # which can be done with 'break 7'
+ jr $ra
+ move $a0,$v0
+.end bn_div_words
+
+.align 5
+.ent bn_div_words_internal
+bn_div_words_internal:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ move $v1,$zero
+ bltz $a2,.L_bn_div_words_body
+ move $t9,$v1
+ $SLL $a2,1
+ bgtz $a2,.-4
+ addu $t9,1
+
+ .set reorder
+ negu $t1,$t9
+ li $t2,-1
+ $SLL $t2,$t1
+ and $t2,$a0
+ $SRL $at,$a1,$t1
+ .set noreorder
+ bnezl $t2,.+8
+ break 6 # signal overflow
+ .set reorder
+ $SLL $a0,$t9
+ $SLL $a1,$t9
+ or $a0,$at
+___
+$QT=$ta0;
+$HH=$ta1;
+$DH=$v1;
+$code.=<<___;
+.L_bn_div_words_body:
+ $SRL $DH,$a2,4*$BNSZ # bits
+ sgeu $at,$a0,$a2
+ .set noreorder
+ bnezl $at,.+8
+ $SUBU $a0,$a2
+ .set reorder
+
+ li $QT,-1
+ $SRL $HH,$a0,4*$BNSZ # bits
+ $SRL $QT,4*$BNSZ # q=0xffffffff
+ beq $DH,$HH,.L_bn_div_words_skip_div1
+ $DIVU $zero,$a0,$DH
+ mflo $QT
+.L_bn_div_words_skip_div1:
+ $MULTU $a2,$QT
+ $SLL $t3,$a0,4*$BNSZ # bits
+ $SRL $at,$a1,4*$BNSZ # bits
+ or $t3,$at
+ mflo $t0
+ mfhi $t1
+.L_bn_div_words_inner_loop1:
+ sltu $t2,$t3,$t0
+ seq $t8,$HH,$t1
+ sltu $at,$HH,$t1
+ and $t2,$t8
+ sltu $v0,$t0,$a2
+ or $at,$t2
+ .set noreorder
+ beqz $at,.L_bn_div_words_inner_loop1_done
+ $SUBU $t1,$v0
+ $SUBU $t0,$a2
+ b .L_bn_div_words_inner_loop1
+ $SUBU $QT,1
+ .set reorder
+.L_bn_div_words_inner_loop1_done:
+
+ $SLL $a1,4*$BNSZ # bits
+ $SUBU $a0,$t3,$t0
+ $SLL $v0,$QT,4*$BNSZ # bits
+
+ li $QT,-1
+ $SRL $HH,$a0,4*$BNSZ # bits
+ $SRL $QT,4*$BNSZ # q=0xffffffff
+ beq $DH,$HH,.L_bn_div_words_skip_div2
+ $DIVU $zero,$a0,$DH
+ mflo $QT
+.L_bn_div_words_skip_div2:
+ $MULTU $a2,$QT
+ $SLL $t3,$a0,4*$BNSZ # bits
+ $SRL $at,$a1,4*$BNSZ # bits
+ or $t3,$at
+ mflo $t0
+ mfhi $t1
+.L_bn_div_words_inner_loop2:
+ sltu $t2,$t3,$t0
+ seq $t8,$HH,$t1
+ sltu $at,$HH,$t1
+ and $t2,$t8
+ sltu $v1,$t0,$a2
+ or $at,$t2
+ .set noreorder
+ beqz $at,.L_bn_div_words_inner_loop2_done
+ $SUBU $t1,$v1
+ $SUBU $t0,$a2
+ b .L_bn_div_words_inner_loop2
+ $SUBU $QT,1
+ .set reorder
+.L_bn_div_words_inner_loop2_done:
+
+ $SUBU $a0,$t3,$t0
+ or $v0,$QT
+ $SRL $v1,$a0,$t9 # $v1 contains remainder if anybody wants it
+ $SRL $a2,$t9 # restore $a2
+
+ .set noreorder
+ move $a1,$v1
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ move $a0,$v0
+.end bn_div_words_internal
+___
+undef $HH; undef $QT; undef $DH;
+
+($a_0,$a_1,$a_2,$a_3)=($t0,$t1,$t2,$t3);
+($b_0,$b_1,$b_2,$b_3)=($ta0,$ta1,$ta2,$ta3);
+
+($a_4,$a_5,$a_6,$a_7)=($s0,$s2,$s4,$a1); # once we load a[7], no use for $a1
+($b_4,$b_5,$b_6,$b_7)=($s1,$s3,$s5,$a2); # once we load b[7], no use for $a2
+
+($t_1,$t_2,$c_1,$c_2,$c_3)=($t8,$t9,$v0,$v1,$a3);
+
+$code.=<<___;
+
+.align 5
+.globl bn_mul_comba8
+.ent bn_mul_comba8
+bn_mul_comba8:
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,12*$SZREG,$ra
+ .mask 0x803ff008,-$SZREG
+ $PTR_SUB $sp,12*$SZREG
+ $REG_S $ra,11*$SZREG($sp)
+ $REG_S $s5,10*$SZREG($sp)
+ $REG_S $s4,9*$SZREG($sp)
+ $REG_S $s3,8*$SZREG($sp)
+ $REG_S $s2,7*$SZREG($sp)
+ $REG_S $s1,6*$SZREG($sp)
+ $REG_S $s0,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___ if ($flavour !~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x003f0000,-$SZREG
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $s5,5*$SZREG($sp)
+ $REG_S $s4,4*$SZREG($sp)
+ $REG_S $s3,3*$SZREG($sp)
+ $REG_S $s2,2*$SZREG($sp)
+ $REG_S $s1,1*$SZREG($sp)
+ $REG_S $s0,0*$SZREG($sp)
+___
+$code.=<<___;
+
+ .set reorder
+ $LD $a_0,0($a1) # If compiled with -mips3 option on
+ # R5000 box assembler barks on this
+ # 1ine with "should not have mult/div
+ # as last instruction in bb (R10K
+ # bug)" warning. If anybody out there
+ # has a clue about how to circumvent
+ # this do send me a note.
+ # <appro\@fy.chalmers.se>
+
+ $LD $b_0,0($a2)
+ $LD $a_1,$BNSZ($a1)
+ $LD $a_2,2*$BNSZ($a1)
+ $MULTU $a_0,$b_0 # mul_add_c(a[0],b[0],c1,c2,c3);
+ $LD $a_3,3*$BNSZ($a1)
+ $LD $b_1,$BNSZ($a2)
+ $LD $b_2,2*$BNSZ($a2)
+ $LD $b_3,3*$BNSZ($a2)
+ mflo $c_1
+ mfhi $c_2
+
+ $LD $a_4,4*$BNSZ($a1)
+ $LD $a_5,5*$BNSZ($a1)
+ $MULTU $a_0,$b_1 # mul_add_c(a[0],b[1],c2,c3,c1);
+ $LD $a_6,6*$BNSZ($a1)
+ $LD $a_7,7*$BNSZ($a1)
+ $LD $b_4,4*$BNSZ($a2)
+ $LD $b_5,5*$BNSZ($a2)
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_1,$b_0 # mul_add_c(a[1],b[0],c2,c3,c1);
+ $ADDU $c_3,$t_2,$at
+ $LD $b_6,6*$BNSZ($a2)
+ $LD $b_7,7*$BNSZ($a2)
+ $ST $c_1,0($a0) # r[0]=c1;
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_0 # mul_add_c(a[2],b[0],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ $ST $c_2,$BNSZ($a0) # r[1]=c2;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_1,$b_1 # mul_add_c(a[1],b[1],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$b_2 # mul_add_c(a[0],b[2],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$b_3 # mul_add_c(a[0],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,2*$BNSZ($a0) # r[2]=c3;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_1,$b_2 # mul_add_c(a[1],b[2],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $c_3,$c_2,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_2,$b_1 # mul_add_c(a[2],b[1],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_3,$b_0 # mul_add_c(a[3],b[0],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_4,$b_0 # mul_add_c(a[4],b[0],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,3*$BNSZ($a0) # r[3]=c1;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_3,$b_1 # mul_add_c(a[3],b[1],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_2 # mul_add_c(a[2],b[2],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_1,$b_3 # mul_add_c(a[1],b[3],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_0,$b_4 # mul_add_c(a[0],b[4],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_0,$b_5 # mul_add_c(a[0],b[5],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,4*$BNSZ($a0) # r[4]=c2;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_1,$b_4 # mul_add_c(a[1],b[4],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_2,$b_3 # mul_add_c(a[2],b[3],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_3,$b_2 # mul_add_c(a[3],b[2],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_4,$b_1 # mul_add_c(a[4],b[1],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_5,$b_0 # mul_add_c(a[5],b[0],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_6,$b_0 # mul_add_c(a[6],b[0],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,5*$BNSZ($a0) # r[5]=c3;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_5,$b_1 # mul_add_c(a[5],b[1],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $c_3,$c_2,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_4,$b_2 # mul_add_c(a[4],b[2],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_3,$b_3 # mul_add_c(a[3],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_2,$b_4 # mul_add_c(a[2],b[4],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_1,$b_5 # mul_add_c(a[1],b[5],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_0,$b_6 # mul_add_c(a[0],b[6],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_0,$b_7 # mul_add_c(a[0],b[7],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,6*$BNSZ($a0) # r[6]=c1;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_1,$b_6 # mul_add_c(a[1],b[6],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_5 # mul_add_c(a[2],b[5],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_3,$b_4 # mul_add_c(a[3],b[4],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_4,$b_3 # mul_add_c(a[4],b[3],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_5,$b_2 # mul_add_c(a[5],b[2],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_6,$b_1 # mul_add_c(a[6],b[1],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_7,$b_0 # mul_add_c(a[7],b[0],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_7,$b_1 # mul_add_c(a[7],b[1],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,7*$BNSZ($a0) # r[7]=c2;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_6,$b_2 # mul_add_c(a[6],b[2],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_5,$b_3 # mul_add_c(a[5],b[3],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_4,$b_4 # mul_add_c(a[4],b[4],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_3,$b_5 # mul_add_c(a[3],b[5],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_2,$b_6 # mul_add_c(a[2],b[6],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_1,$b_7 # mul_add_c(a[1],b[7],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_2,$b_7 # mul_add_c(a[2],b[7],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,8*$BNSZ($a0) # r[8]=c3;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_3,$b_6 # mul_add_c(a[3],b[6],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $c_3,$c_2,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_4,$b_5 # mul_add_c(a[4],b[5],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_5,$b_4 # mul_add_c(a[5],b[4],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_6,$b_3 # mul_add_c(a[6],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_7,$b_2 # mul_add_c(a[7],b[2],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_7,$b_3 # mul_add_c(a[7],b[3],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,9*$BNSZ($a0) # r[9]=c1;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_6,$b_4 # mul_add_c(a[6],b[4],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_5,$b_5 # mul_add_c(a[5],b[5],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_4,$b_6 # mul_add_c(a[4],b[6],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_3,$b_7 # mul_add_c(a[3],b[7],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_4,$b_7 # mul_add_c(a[4],b[7],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,10*$BNSZ($a0) # r[10]=c2;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_5,$b_6 # mul_add_c(a[5],b[6],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_6,$b_5 # mul_add_c(a[6],b[5],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_7,$b_4 # mul_add_c(a[7],b[4],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_7,$b_5 # mul_add_c(a[7],b[5],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,11*$BNSZ($a0) # r[11]=c3;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_6,$b_6 # mul_add_c(a[6],b[6],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $c_3,$c_2,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_5,$b_7 # mul_add_c(a[5],b[7],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_6,$b_7 # mul_add_c(a[6],b[7],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,12*$BNSZ($a0) # r[12]=c1;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_7,$b_6 # mul_add_c(a[7],b[6],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_7,$b_7 # mul_add_c(a[7],b[7],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,13*$BNSZ($a0) # r[13]=c2;
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ $ST $c_3,14*$BNSZ($a0) # r[14]=c3;
+ $ST $c_1,15*$BNSZ($a0) # r[15]=c1;
+
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $s5,10*$SZREG($sp)
+ $REG_L $s4,9*$SZREG($sp)
+ $REG_L $s3,8*$SZREG($sp)
+ $REG_L $s2,7*$SZREG($sp)
+ $REG_L $s1,6*$SZREG($sp)
+ $REG_L $s0,5*$SZREG($sp)
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ jr $ra
+ $PTR_ADD $sp,12*$SZREG
+___
+$code.=<<___ if ($flavour !~ /nubi/i);
+ $REG_L $s5,5*$SZREG($sp)
+ $REG_L $s4,4*$SZREG($sp)
+ $REG_L $s3,3*$SZREG($sp)
+ $REG_L $s2,2*$SZREG($sp)
+ $REG_L $s1,1*$SZREG($sp)
+ $REG_L $s0,0*$SZREG($sp)
+ jr $ra
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+.end bn_mul_comba8
+
+.align 5
+.globl bn_mul_comba4
+.ent bn_mul_comba4
+bn_mul_comba4:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ $LD $a_0,0($a1)
+ $LD $b_0,0($a2)
+ $LD $a_1,$BNSZ($a1)
+ $LD $a_2,2*$BNSZ($a1)
+ $MULTU $a_0,$b_0 # mul_add_c(a[0],b[0],c1,c2,c3);
+ $LD $a_3,3*$BNSZ($a1)
+ $LD $b_1,$BNSZ($a2)
+ $LD $b_2,2*$BNSZ($a2)
+ $LD $b_3,3*$BNSZ($a2)
+ mflo $c_1
+ mfhi $c_2
+ $ST $c_1,0($a0)
+
+ $MULTU $a_0,$b_1 # mul_add_c(a[0],b[1],c2,c3,c1);
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_1,$b_0 # mul_add_c(a[1],b[0],c2,c3,c1);
+ $ADDU $c_3,$t_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_0 # mul_add_c(a[2],b[0],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ $ST $c_2,$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_1,$b_1 # mul_add_c(a[1],b[1],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$b_2 # mul_add_c(a[0],b[2],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$b_3 # mul_add_c(a[0],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,2*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_1,$b_2 # mul_add_c(a[1],b[2],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $c_3,$c_2,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_2,$b_1 # mul_add_c(a[2],b[1],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_3,$b_0 # mul_add_c(a[3],b[0],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_3,$b_1 # mul_add_c(a[3],b[1],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,3*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_2 # mul_add_c(a[2],b[2],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $c_1,$c_3,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_1,$b_3 # mul_add_c(a[1],b[3],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$b_3 # mul_add_c(a[2],b[3],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,4*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_3,$b_2 # mul_add_c(a[3],b[2],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $c_2,$c_1,$t_2
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_3,$b_3 # mul_add_c(a[3],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,5*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ $ST $c_1,6*$BNSZ($a0)
+ $ST $c_2,7*$BNSZ($a0)
+
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ nop
+.end bn_mul_comba4
+___
+
+($a_4,$a_5,$a_6,$a_7)=($b_0,$b_1,$b_2,$b_3);
+
+$code.=<<___;
+
+.align 5
+.globl bn_sqr_comba8
+.ent bn_sqr_comba8
+bn_sqr_comba8:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ $LD $a_0,0($a1)
+ $LD $a_1,$BNSZ($a1)
+ $LD $a_2,2*$BNSZ($a1)
+ $LD $a_3,3*$BNSZ($a1)
+
+ $MULTU $a_0,$a_0 # mul_add_c(a[0],b[0],c1,c2,c3);
+ $LD $a_4,4*$BNSZ($a1)
+ $LD $a_5,5*$BNSZ($a1)
+ $LD $a_6,6*$BNSZ($a1)
+ $LD $a_7,7*$BNSZ($a1)
+ mflo $c_1
+ mfhi $c_2
+ $ST $c_1,0($a0)
+
+ $MULTU $a_0,$a_1 # mul_add_c2(a[0],b[1],c2,c3,c1);
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_2,$a_0 # mul_add_c2(a[2],b[0],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $c_3,$t_2,$at
+ $ST $c_2,$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_1 # mul_add_c(a[1],b[1],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$a_3 # mul_add_c2(a[0],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,2*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_3,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_2 # mul_add_c2(a[1],b[2],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_4,$a_0 # mul_add_c2(a[4],b[0],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,3*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_3,$a_1 # mul_add_c2(a[3],b[1],c2,c3,c1);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_1,$at
+ $MULTU $a_2,$a_2 # mul_add_c(a[2],b[2],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_0,$a_5 # mul_add_c2(a[0],b[5],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,4*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_4 # mul_add_c2(a[1],b[4],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_2,$at
+ $MULTU $a_2,$a_3 # mul_add_c2(a[2],b[3],c3,c1,c2);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $MULTU $a_6,$a_0 # mul_add_c2(a[6],b[0],c1,c2,c3);
+ $ADDU $c_2,$at
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,5*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_3,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_5,$a_1 # mul_add_c2(a[5],b[1],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_4,$a_2 # mul_add_c2(a[4],b[2],c1,c2,c3);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_3,$a_3 # mul_add_c(a[3],b[3],c1,c2,c3);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_0,$a_7 # mul_add_c2(a[0],b[7],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,6*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_6 # mul_add_c2(a[1],b[6],c2,c3,c1);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_1,$at
+ $MULTU $a_2,$a_5 # mul_add_c2(a[2],b[5],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_1,$at
+ $MULTU $a_3,$a_4 # mul_add_c2(a[3],b[4],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_1,$at
+ $MULTU $a_7,$a_1 # mul_add_c2(a[7],b[1],c3,c1,c2);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,7*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_6,$a_2 # mul_add_c2(a[6],b[2],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_2,$at
+ $MULTU $a_5,$a_3 # mul_add_c2(a[5],b[3],c3,c1,c2);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_2,$at
+ $MULTU $a_4,$a_4 # mul_add_c(a[4],b[4],c3,c1,c2);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_2,$a_7 # mul_add_c2(a[2],b[7],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,8*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_3,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_3,$a_6 # mul_add_c2(a[3],b[6],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_4,$a_5 # mul_add_c2(a[4],b[5],c1,c2,c3);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_7,$a_3 # mul_add_c2(a[7],b[3],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,9*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_6,$a_4 # mul_add_c2(a[6],b[4],c2,c3,c1);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_1,$at
+ $MULTU $a_5,$a_5 # mul_add_c(a[5],b[5],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_4,$a_7 # mul_add_c2(a[4],b[7],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,10*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_5,$a_6 # mul_add_c2(a[5],b[6],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_2,$at
+ $MULTU $a_7,$a_5 # mul_add_c2(a[7],b[5],c1,c2,c3);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,11*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_3,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_6,$a_6 # mul_add_c(a[6],b[6],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $MULTU $a_6,$a_7 # mul_add_c2(a[6],b[7],c2,c3,c1);
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,12*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_7,$a_7 # mul_add_c(a[7],b[7],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,13*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ $ST $c_3,14*$BNSZ($a0)
+ $ST $c_1,15*$BNSZ($a0)
+
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ nop
+.end bn_sqr_comba8
+
+.align 5
+.globl bn_sqr_comba4
+.ent bn_sqr_comba4
+bn_sqr_comba4:
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ .frame $sp,6*$SZREG,$ra
+ .mask 0x8000f008,-$SZREG
+ .set noreorder
+ $PTR_SUB $sp,6*$SZREG
+ $REG_S $ra,5*$SZREG($sp)
+ $REG_S $t3,4*$SZREG($sp)
+ $REG_S $t2,3*$SZREG($sp)
+ $REG_S $t1,2*$SZREG($sp)
+ $REG_S $t0,1*$SZREG($sp)
+ $REG_S $gp,0*$SZREG($sp)
+___
+$code.=<<___;
+ .set reorder
+ $LD $a_0,0($a1)
+ $LD $a_1,$BNSZ($a1)
+ $MULTU $a_0,$a_0 # mul_add_c(a[0],b[0],c1,c2,c3);
+ $LD $a_2,2*$BNSZ($a1)
+ $LD $a_3,3*$BNSZ($a1)
+ mflo $c_1
+ mfhi $c_2
+ $ST $c_1,0($a0)
+
+ $MULTU $a_0,$a_1 # mul_add_c2(a[0],b[1],c2,c3,c1);
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_2,$a_0 # mul_add_c2(a[2],b[0],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $c_3,$t_2,$at
+ $ST $c_2,$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_1 # mul_add_c(a[1],b[1],c3,c1,c2);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $MULTU $a_0,$a_3 # mul_add_c2(a[0],b[3],c1,c2,c3);
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,2*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_3,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_1,$a_2 # mul_add_c(a2[1],b[2],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ mflo $t_1
+ mfhi $t_2
+ slt $at,$t_2,$zero
+ $ADDU $c_3,$at
+ $MULTU $a_3,$a_1 # mul_add_c2(a[3],b[1],c2,c3,c1);
+ $SLL $t_2,1
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ sltu $at,$c_2,$t_2
+ $ADDU $c_3,$at
+ $ST $c_1,3*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_1,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_2,$a_2 # mul_add_c(a[2],b[2],c2,c3,c1);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_2,$t_1
+ sltu $at,$c_2,$t_1
+ $MULTU $a_2,$a_3 # mul_add_c2(a[2],b[3],c3,c1,c2);
+ $ADDU $t_2,$at
+ $ADDU $c_3,$t_2
+ sltu $at,$c_3,$t_2
+ $ADDU $c_1,$at
+ $ST $c_2,4*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ slt $c_2,$t_2,$zero
+ $SLL $t_2,1
+ $MULTU $a_3,$a_3 # mul_add_c(a[3],b[3],c1,c2,c3);
+ slt $a2,$t_1,$zero
+ $ADDU $t_2,$a2
+ $SLL $t_1,1
+ $ADDU $c_3,$t_1
+ sltu $at,$c_3,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_1,$t_2
+ sltu $at,$c_1,$t_2
+ $ADDU $c_2,$at
+ $ST $c_3,5*$BNSZ($a0)
+
+ mflo $t_1
+ mfhi $t_2
+ $ADDU $c_1,$t_1
+ sltu $at,$c_1,$t_1
+ $ADDU $t_2,$at
+ $ADDU $c_2,$t_2
+ $ST $c_1,6*$BNSZ($a0)
+ $ST $c_2,7*$BNSZ($a0)
+
+ .set noreorder
+___
+$code.=<<___ if ($flavour =~ /nubi/i);
+ $REG_L $t3,4*$SZREG($sp)
+ $REG_L $t2,3*$SZREG($sp)
+ $REG_L $t1,2*$SZREG($sp)
+ $REG_L $t0,1*$SZREG($sp)
+ $REG_L $gp,0*$SZREG($sp)
+ $PTR_ADD $sp,6*$SZREG
+___
+$code.=<<___;
+ jr $ra
+ nop
+.end bn_sqr_comba4
+___
+print $code;
+close STDOUT;
projects / openssl.git / commitdiff