#!/bin/bash
t=/tmp/mipscc$$
gcc-mipsel-4.1 -mips1 -mgp32 -mfp32 -msym32 -mno-dsp --omit-frame-pointer -S $@ -o mips.as
sed 's/#.*$//
s/\.previous.*$//
s/\.ident.*$//
s/\.file.*$//
s/\.globl.*$//
s/\.align.*$//
s/\.set.*$//
s/\.cpload.*$//
s/\.cprestore.*$//
s/\.size.*$//
s/\.end.*$//
s/\.type.*$//
s/\.frame.*$//
s/\.mask.*$//
s/\.fmask.*$//
s/[ \t]nop[ \t]*$//
s/\$zero/$0/g
s/\$at/$1/g
s/\$v0/$2/g
s/\$v1/$3/g
s/\$a0/$4/g
s/\$a1/$5/g
s/\$a2/$6/g
s/\$a3/$7/g
s/\$t0/$8/g
s/\$t1/$9/g
s/\$t2/$10/g
s/\$t3/$11/g
s/\$t4/$12/g
s/\$t5/$13/g
s/\$t6/$14/g
s/\$t7/$15/g
s/\$s0/$16/g
s/\$s1/$17/g
s/\$s2/$18/g
s/\$s3/$19/g
s/\$s4/$20/g
s/\$s5/$21/g
s/\$s6/$22/g
s/\$s7/$23/g
s/\$t8/$24/g
s/\$t9/$25/g
s/\$k0/$26/g
s/\$k1/$27/g
s/\$gp/$28/g
s/\$sp/$29/g
s/\$fp/$30/g
s/\$ra/$31/g
s/\$\([a-eg-zA-Z_][a-zA-Z_0-9]*\)/DOL_\1/g
s/,/, /g
s/\t/ /g
s/[ ]*$//
s/  / /g
/^[ \t]*$/d
s/%got(\(.*\))(\$28)/%got \1/
s/%call16(\(.*\))(\$28)/%got \1/
s/%lo(\(.*\))(\($.*\))/%lo \2/
' <mips.as |awk --non-decimal-data '
BEGIN	{
	mults = "$cannot_pair_with_mult_error"
	multt = "$cannot_pair_with_mult_error"
	cmpf = "cannot_pair_with_cfc1_error"
	nxtlab = 0
	frame = 0
	}
/^ break /	{
	/* This seems to be used for trap of divide by 0 */
	next
	}
/^ c\.lt\.s /	{
	cmpf = "sltf"
	cmp2 = $2
	cmp3 = $3
	cmpnot = "bc1t"
	next
	}
/^ c\.le\.s /	{
	cmpf = "sltf"
	cmp2 = $3
	cmp3 = $2
	cmpnot = "bc1t"
	next
	}
/^ c\.eq\.s /	{
	cmpf = "eqf"
	cmp2 = $2
	cmp3 = $3
	cmpnot = "bc1t"
	next
	}
/^ (bc1t|bc1f) /	{
	if (cmpf == "eqf") {
		if (cmpnot == $1) {
			print " beq " cmp2 " " cmp3 " " $2
		} else {
			print " bne " cmp2 " " cmp3 " " $2
		}
	} else {
		print " " cmpf " $32 " cmp2 " " cmp3
		if (cmpnot == $1) {
			print " bne $0, $32, " $2
		} else {
			print " beq $0, $32, " $2
		}
	}
	next
	}
/^ cfc1 /	{
	if ($3 != "$31") {
		print "kcc does not understand this cfc1" >>"/dev/stderr"
	}
	print " " cmpf " " $2 " " cmp2 " " cmp3
	if (cmpnot == "t") {
		print " xori " $2 " " $2 " " 1
	}
	next
	}
/^ mul /	{
	print $0 " happened?" >>"/dev/stderr"
	next
	}
/^ (mult|multu) /	{
	/* Remove mult, replace when mflo or mfhi... */
	/* really sloppy, because control flow is */
	/* not considered, so may not pair correctly */
	mulop = "mul"
	mults = $2
	multt = $3
	next
	}
/^ (div|divu) /	{
	/* Remove div, replace when mflo or mfhi... */
	/* really sloppy, because control flow is */
	/* not considered, so may not pair correctly */
	mulop = $1
	mults = $2
	multt = $3
	if ($4 != "") {
		/* Synthetic div instruction? */
		if ($2 == "$0,") {
			/* Nope, special case */
			mults = $3
			multt = $4
		} else {
			/* Yup, do it */
			print " mov " $2 " " substr($3, 1, length($3)-1)
			print " " $1 " " $2 " " $4
		}
	}
	next
	}
/^ mflo /	{
	print " " mulop " " $2 ", " mults " " multt
	next
	}
/^ mfhi /	{
	if (mulop == "div") {
		print " rem " $2 ", " mults " " multt
	} else {
		print " mulhi " $2 ", " mults " " multt
	}
	next
	}
/^ (mtc1|mfc1) /	{
	/* Coprocessor is not special */
	print " mov " $2 " " $3
	next
	}
/^ (ori|addi|addiu) /	{
	/* Peephole remove op with 0 */
	if ($4 == "0") next
	}
/^ (addu|xor|or) /	{
	if ($3 == "$0,") {
		print " li " $2 " " $4
		next
	}
	}
/^ addiu/	{
	if ($3 == "$0,") {
		print " li " $2 " " $4
	} else {
		print " li $32, " $4
		print " addu " $2 " " $3 " $32"
	}
	next
	}
/^ (xor|or)i /	{
	if ($3 == "$0,") {
		print " li " $2 " " $4
	} else {
		print " li $32, " $4
		print " " substr($1, 1, length($1)-1) " " $2 " " $3 " $32"
	}
	next
	}
/^ andi /	{
	print " li $32, " $4
	print " and " $2 " " $3 " $32"
	next
	}
/^ slti /	{
	print " li $32, " $4
	print " slt " $2 " " $3 " $32"
	next
	}
/^ sltiu /	{
	print " li $32, " $4
	print " sltu " $2 " " $3 " $32"
	next
	}
/^ (sltu|sll|sra|srl|slt) /	{
	if (substr($4, 1, 1) == "$") {
		print $0
	} else {
		/* Fixes a bug where LCC uses sltu not sltui */
		print " li $32, " $4
		print " " $1 " " $2 " " $3 " $32"
	}
	next
	}
/^ lui/	{
	print " li " $2 " " ($3 * 65536)
	next
	}
/%(lo|got)/	{
	/* Remove global offset table junk */
	print " la " $2 " " $4
	next
	}
/^ [ls]([whb]|bu|hu|wc1) / {
	print $0
	next
	}
/^ (beq|bne) /	{
	if ($4 == "1f") {
		print " " $1 " " $2 " " $3 " MYLOCAL_" nxtlab
	} else {
		print $0
	}
	next
	}
/^.*:$/	{
	/* Assumes only label on this line */
	if ($1 == "1:") {
		print "MYLOCAL_" nxtlab ":"
		++nxtlab
	} else {
		print $1
	}
	next
	}
/^/	{
	print $0 " ###"
	}
' |awk '
/^ [ls]([whb]|bu|hu|wc1) / {
	/* Replace offset computation inside load or store */
	/* also make c1 stuff no longer special */
	off = substr($3, 1, index($3, "(")-1)
	reg = substr($3, index($3, "(")+1)
	reg = substr(reg, 1, length(reg)-1)
	op = $1
	if (op == "lwc1") op = "lw"
	if (op == "swc1") op = "sw"
	if (op == "lhu") op = "lh"
	if (op == "lbu") op = "lb"
	if (off == "0") {
		print " " op " " $2 " " reg
	} else {
		print " li $32, " off
		if (reg != "$0") {
			print " addu $32, $32, " reg
		}
		print " " op " " $2 " $32"
	}
	if ($1 == "lhu") {
		print " li $32, 0x0000ffff"
		print " and " $2 " $32, " substr($2, 1, length($2)-1)
	}
	if ($1 == "lbu") {
		print " li $32, 0x000000ff"
		print " and " $2 " $32, " substr($2, 1, length($2)-1)
	}
	next
	}
/^/	{
	print $0
	}
' |./conflow |./twe2acc |./lrsropt |./regmap |./colseg |./deadopt