diff --git a/sys/src/libmp/test/dat.h b/sys/src/libmp/test/dat.h
new file mode 100644
index 000000000..fb81ea079
--- /dev/null
+++ b/sys/src/libmp/test/dat.h
@@ -0,0 +1,10 @@
+typedef struct ldint ldint;
+
+struct ldint {
+	int n;
+	u8int *b;
+};
+
+enum {NTEST = 2 * 257 + 32};
+
+#pragma varargck type "L" ldint *
diff --git a/sys/src/libmp/test/fns.h b/sys/src/libmp/test/fns.h
new file mode 100644
index 000000000..c70d1c27e
--- /dev/null
+++ b/sys/src/libmp/test/fns.h
@@ -0,0 +1,8 @@
+ldint* ldnew(int);
+void ldfree(ldint *);
+void testgen(int, ldint *);
+int ldmpeq(ldint *, mpint *);
+mpint* ldtomp(ldint *, mpint *);
+void mptarget(mpint *);
+void tests(void);
+void mpdiv_(mpint *, mpint *, mpint *, mpint *);
diff --git a/sys/src/libmp/test/ld.c b/sys/src/libmp/test/ld.c
new file mode 100644
index 000000000..bea53e87b
--- /dev/null
+++ b/sys/src/libmp/test/ld.c
@@ -0,0 +1,660 @@
+#include <u.h>
+#include <libc.h>
+#include <mp.h>
+#include <libsec.h>
+#include "dat.h"
+#include "fns.h"
+
+ldint _ldzero = {1, (u8int*)"\0"};
+ldint _ldone = {2, (u8int*)"\1\0"};
+ldint *ldzero = &_ldzero;
+ldint *ldone = &_ldone;
+
+int
+ldget(ldint *a, int n)
+{
+	if(n < 0) return 0;
+	if(n >= a->n) return a->b[a->n - 1]&1;
+	return a->b[n]&1;
+}
+
+void
+ldbits(ldint *a, int n)
+{
+	a->b = realloc(a->b, n);
+	a->n = n;
+}
+
+ldint *
+ldnorm(ldint *a)
+{
+	int i;
+
+	if(a->n > 0){
+		for(i = a->n - 2; i >= 0; i--)
+			if(a->b[i] != a->b[a->n-1])
+				break;
+		ldbits(a, i + 2);
+	}else{
+		ldbits(a, 1);
+		a->b[0] = 0;
+	}
+	return a;
+}
+
+void
+ldneg(ldint *a)
+{
+	int i, c, s, z;
+	
+	c = 1;
+	s = a->b[a->n - 1];
+	z = 1;
+	for(i = 0; i < a->n; i++){
+		if(a->b[i]) z = 0;
+		c += 1 ^ a->b[i] & 1;
+		a->b[i] = c & 1;
+		c >>= 1;
+	}
+	if(!z && s == a->b[a->n - 1]){
+		ldbits(a, a->n + 1);
+		a->b[a->n - 1] = !s;
+	}
+}
+
+int
+max(int a, int b)
+{
+	return a>b? a : b;
+}
+
+ldint *
+ldnew(int n)
+{
+	ldint *a;
+	
+	a = malloc(sizeof(ldint));
+	if(n <= 0) n = 1;
+	a->b = malloc(n);
+	a->n = n;
+	return a;
+}
+
+void
+ldfree(ldint *a)
+{
+	if(a == nil) return;
+	free(a->b);
+	free(a);
+}
+
+void
+ldsanity(ldint *a)
+{
+	int i;
+	
+	assert(a->n > 0);
+	for(i = 0; i < a->n; i++)
+		assert(a->b[i] < 2);
+}
+
+ldint *
+ldrand(int n, ldint *a)
+{
+	int i;
+	
+	if(a == nil)
+		a = ldnew(n);
+	else
+		ldbits(a, n);
+	for(i = 0; i < n; i++)
+		a->b[i] = rand() & 1;
+	return a;
+}
+
+mpint *
+ldtomp(ldint *a, mpint *b)
+{
+	int s, c, i;
+
+	if(b == nil)
+		b = mpnew(0);
+	mpbits(b, a->n);
+	s = a->b[a->n - 1] & 1;
+	b->sign = 1 - 2 * s;
+	c = s;
+	memset(b->p, 0, (a->n + Dbits - 1) / Dbits * Dbytes);
+	for(i = 0; i < a->n; i++){
+		c += s ^ a->b[i] & 1;
+		b->p[i / Dbits] |= (mpdigit)(c & 1) << (i & Dbits - 1);
+		c >>= 1;
+	}
+	b->top = (a->n + Dbits - 1) / Dbits;
+	mpnorm(b);
+	return b;
+}
+
+void
+mptold(mpint *b, ldint *a)
+{
+	int i, j, n, c;
+
+	n = mpsignif(b) + 1;
+	ldbits(a, n);
+	memset(a->b, 0, n);
+	for(i = 0; i <= b->top; i++)
+		for(j = 0; j < Dbits; j++)
+			if(Dbits * i + j < n)
+				a->b[Dbits * i + j] = b->p[i] >> j & 1;
+	if(b->sign < 0){
+		c = 1;
+		for(i = 0; i < a->n; i++){
+			c += 1 ^ a->b[i] & 1;
+			a->b[i] = c & 1;
+			c >>= 1;
+		}
+	}	
+}
+
+ldint *
+itold(int n, ldint *a)
+{
+	int i;
+
+	if(a == nil)
+		a = ldnew(sizeof(n)*8);
+	else
+		ldbits(a, sizeof(n)*8);
+	for(i = 0; i < sizeof(n)*8; i++)
+		a->b[i] = n >> i & 1;
+	ldnorm(a);
+	return a;
+}
+
+ldint *
+pow2told(int n, ldint *a)
+{
+	int k;
+	
+	k = abs(n);
+	if(a == nil)
+		a = ldnew(k+2);
+	else
+		ldbits(a, k+2);
+	memset(a->b, 0, k+2);
+	a->b[k] = 1;
+	if(n < 0) ldneg(a);
+	ldnorm(a);
+	return a;
+}
+
+int
+ldfmt(Fmt *f)
+{
+	ldint *a;
+	char *b, *p;
+	int i, d, s, c;
+	
+	a = va_arg(f->args, ldint *);
+	d = (a->n + 3) / 4;
+	b = calloc(1, d + 1);
+	c = s = a->b[a->n - 1];
+	for(i = 0; i < a->n; i++){
+		c += s^ldget(a, i);
+		b[d - 1 - (i >> 2)] |= (c & 1) << (i & 3);
+		c >>= 1;
+	}
+	for(i = 0; i < d; i++)
+		b[i] = "0123456789ABCDEF"[b[i]];
+	p = b;
+	while(*p == '0' && p[1] != 0) p++;
+	if(a->b[a->n - 1]) fmtrune(f, '-');
+	fmtprint(f, "0x%s", p);
+	free(b);
+	return 0;
+}
+
+int
+ldcmp(ldint *a, ldint *b)
+{
+	int x, y;
+	int i, r;
+	
+	r = max(a->n, b->n);
+	if(a->b[a->n-1] != b->b[b->n-1])
+		return b->b[b->n - 1] - a->b[a->n - 1];
+	for(i = r - 1; --i >= 0; ){
+		x = ldget(a, i);
+		y = ldget(b, i);
+		if(x != y)
+			return x - y;
+	}
+	return 0;
+}
+
+int
+ldmagcmp(ldint *a, ldint *b)
+{
+	int s1, s2, r;
+	
+	s1 = a->b[a->n - 1];
+	s2 = b->b[b->n - 1];
+	if(s1) ldneg(a);
+	if(s2) ldneg(b);
+	r = ldcmp(a, b);
+	if(s1) ldneg(a);
+	if(s2) ldneg(b);
+	return r;
+}
+
+int
+ldmpeq(ldint *a, mpint *b)
+{
+	int i, c;
+
+	if(b->sign > 0){
+		for(i = 0; i < b->top * Dbits; i++)
+			if(ldget(a, i) != (b->p[i / Dbits] >> (i & Dbits - 1) & 1))
+				return 0;
+		for(; i < a->n; i++)
+			if(a->b[i] != 0)
+				return 0;
+		return 1;
+	}else{
+		c = 1;
+		for(i = 0; i < b->top * Dbits; i++){
+			c += !ldget(a, i);
+			if((c & 1) != (b->p[i / Dbits] >> (i & Dbits - 1) & 1))
+				return 0;
+			c >>= 1;
+		}
+		for(; i < a->n; i++)
+			if(a->b[i] != 1)
+				return 0;
+		return 1;
+	}
+}
+
+void
+mptarget(mpint *r)
+{
+	int n;
+
+	n = nrand(16);
+	mpbits(r, n * Dbits);
+	r->top = n;
+	prng((void *) r->p, n * Dbytes);
+	r->sign = 1 - 2 * (rand() & 1);
+}
+
+void
+ldadd(ldint *a, ldint *b, ldint *q)
+{
+	int r, i, c;
+	
+	r = max(a->n, b->n) + 1;
+	ldbits(q, r);
+	c = 0;
+	for(i = 0; i < r; i++){
+		c += ldget(a, i) + ldget(b, i);
+		q->b[i] = c & 1;
+		c >>= 1;
+	}
+	ldnorm(q);
+}
+
+void
+ldmagadd(ldint *a, ldint *b, ldint *q)
+{
+	int i, r, s1, s2, c1, c2, co;
+	
+	r = max(a->n, b->n) + 2;
+	ldbits(q, r);
+	co = 0;
+	s1 = c1 = a->b[a->n - 1] & 1;
+	s2 = c2 = b->b[b->n - 1] & 1;
+	for(i = 0; i < r; i++){
+		c1 += s1 ^ ldget(a, i) & 1;
+		c2 += s2 ^ ldget(b, i) & 1;
+		co += (c1 & 1) + (c2 & 1);
+		q->b[i] = co & 1;
+		co >>= 1;
+		c1 >>= 1;
+		c2 >>= 1;
+	}
+	ldnorm(q);
+}
+
+void
+ldmagsub(ldint *a, ldint *b, ldint *q)
+{
+	int i, r, s1, s2, c1, c2, co;
+	
+	r = max(a->n, b->n) + 2;
+	ldbits(q, r);
+	co = 0;
+	s1 = c1 = a->b[a->n - 1] & 1;
+	s2 = c2 = 1 ^ b->b[b->n - 1] & 1;
+	for(i = 0; i < r; i++){
+		c1 += s1 ^ ldget(a, i) & 1;
+		c2 += s2 ^ ldget(b, i) & 1;
+		co += (c1 & 1) + (c2 & 1);
+		q->b[i] = co & 1;
+		co >>= 1;
+		c1 >>= 1;
+		c2 >>= 1;
+	}
+	ldnorm(q);
+}
+
+void
+ldsub(ldint *a, ldint *b, ldint *q)
+{
+	int r, i, c;
+	
+	r = max(a->n, b->n) + 1;
+	ldbits(q, r);
+	c = 1;
+	for(i = 0; i < r; i++){
+		c += ldget(a, i) + (1^ldget(b, i));
+		q->b[i] = c & 1;
+		c >>= 1;
+	}
+	ldnorm(q);
+}
+
+void
+ldmul(ldint *a, ldint *b, ldint *q)
+{
+	int c1, c2, co, s1, s2, so, i, j;
+	
+	c1 = s1 = a->b[a->n - 1] & 1;
+	s2 = b->b[b->n - 1] & 1;
+	so = s1 ^ s2;
+	ldbits(q, a->n + b->n + 1);
+	memset(q->b, 0, a->n + b->n + 1);
+	for(i = 0; i < a->n; i++){
+		c1 += s1 ^ a->b[i] & 1;
+		if((c1 & 1) != 0){
+			c2 = s2;
+			for(j = 0; j < b->n; j++){
+				c2 += (s2 ^ b->b[j] & 1) + q->b[i + j];
+				q->b[i + j] = c2 & 1;
+				c2 >>= 1;
+			}
+			for(; c2 > 0; j++){
+				assert(i + j < q->n);
+				q->b[i + j] = c2 & 1;
+				c2 >>= 1;
+			}
+		}
+		c1 >>= 1;
+	}
+	co = so;
+	for(i = 0; i < q->n; i++){
+		co += so ^ q->b[i];
+		q->b[i] = co & 1;
+		co >>= 1;
+	}
+}
+
+void
+lddiv(ldint *a, ldint *b, ldint *q, ldint *r)
+{
+	int n, i, j, c, s;
+	
+	n = max(a->n, b->n) + 1;
+	ldbits(q, n);
+	ldbits(r, n);
+	memset(r->b, 0, n);
+	c = s = a->b[a->n-1];
+	for(i = 0; i < n; i++){
+		c += s ^ ldget(a, i);
+		q->b[i] = c & 1;
+		c >>= 1;
+	}
+	for(i = 0; i < n; i++){
+		for(j = n-1; --j >= 0; )
+			r->b[j + 1] = r->b[j];
+		r->b[0] = q->b[n - 1];
+		for(j = n-1; --j >= 0; )
+			q->b[j + 1] = q->b[j];
+		q->b[0] = !r->b[n - 1];
+		c = s = r->b[n - 1] == b->b[b->n - 1];
+		for(j = 0; j < n; j++){
+			c += r->b[j] + (s ^ ldget(b, j));
+			r->b[j] = c & 1;
+			c >>= 1;
+		}
+	}
+	for(j = n-1; --j >= 0; )
+		q->b[j + 1] = q->b[j];
+	q->b[0] = 1;
+	if(r->b[r->n - 1]){
+		c = 0;
+		for(j = 0; j < n; j++){
+			c += 1 + q->b[j];
+			q->b[j] = c & 1;
+			c >>= 1;
+		}
+		c = s = b->b[b->n - 1];
+		for(j = 0; j < n; j++){
+			c += r->b[j] + (s ^ ldget(b, j));
+			r->b[j] = c & 1;
+			c >>= 1;
+		}
+	}
+	c = s = a->b[a->n-1] ^ b->b[b->n-1];
+	for(j = 0; j < n; j++){
+		c += s ^ q->b[j];
+		q->b[j] = c & 1;
+		c >>= 1;
+	}
+	c = s = a->b[a->n-1];
+	for(j = 0; j < n; j++){
+		c += s ^ r->b[j];
+		r->b[j] = c & 1;
+		c >>= 1;
+	}
+	ldnorm(q);
+	ldnorm(r);
+}
+
+void
+lddiv_(ldint *a, ldint *b, ldint *q, ldint *r)
+{
+	if(ldmpeq(b, mpzero)){
+		memset(q->b, 0, q->n);
+		memset(r->b, 0, r->n);
+		return;
+	}
+	lddiv(a, b, q, r);
+}
+
+void
+mpdiv_(mpint *a, mpint *b, mpint *q, mpint *r)
+{
+	if(mpcmp(b, mpzero) == 0){
+		mpassign(mpzero, q);
+		mpassign(mpzero, r);
+		return;
+	}
+	mpdiv(a, b, q, r);
+}
+
+void
+ldand(ldint *a, ldint *b, ldint *q)
+{
+	int r, i;
+	
+	r = max(a->n, b->n);
+	ldbits(q, r);
+	for(i = 0; i < r; i++)
+		q->b[i] = ldget(a, i) & ldget(b, i);
+	ldnorm(q);
+}
+
+void
+ldbic(ldint *a, ldint *b, ldint *q)
+{
+	int r, i;
+	
+	r = max(a->n, b->n);
+	ldbits(q, r);
+	for(i = 0; i < r; i++)
+		q->b[i] = ldget(a, i) & ~ldget(b, i);
+	ldnorm(q);
+}
+
+void
+ldor(ldint *a, ldint *b, ldint *q)
+{
+	int r, i;
+	
+	r = max(a->n, b->n);
+	ldbits(q, r);
+	for(i = 0; i < r; i++)
+		q->b[i] = ldget(a, i) | ldget(b, i);
+	ldnorm(q);
+}
+
+void
+ldxor(ldint *a, ldint *b, ldint *q)
+{
+	int r, i;
+	
+	r = max(a->n, b->n);
+	ldbits(q, r);
+	for(i = 0; i < r; i++)
+		q->b[i] = ldget(a, i) ^ ldget(b, i);
+	ldnorm(q);
+}
+
+void
+ldleft(ldint *a, int n, ldint *b)
+{
+	int i, c;
+
+	if(n < 0){
+		if(a->n <= -n){
+			b->n = 0;
+			ldnorm(b);
+			return;
+		}
+		c = 0;
+		if(a->b[a->n - 1])
+			for(i = 0; i < -n; i++)
+				if(a->b[i]){
+					c = 1;
+					break;
+				}
+		ldbits(b, a->n + n);
+		for(i = 0; i < a->n + n; i++){
+			c += a->b[i - n] & 1;
+			b->b[i] = c & 1;
+			c >>= 1;
+		}
+	}else{
+		ldbits(b, a->n + n);
+		memmove(b->b + n, a->b, a->n);
+		memset(b->b, 0, n);
+	}
+	ldnorm(b);
+}
+
+void
+ldright(ldint *a, int n, ldint *b)
+{
+	ldleft(a, -n, b);
+}
+
+void
+ldasr(ldint *a, int n, ldint *b)
+{
+	if(n < 0){
+		ldleft(a, -n, b);
+		return;
+	}
+	if(a->n <= n){
+		ldbits(b, 1);
+		b->b[0] = a->b[a->n - 1];
+		return;
+	}
+	ldbits(b, a->n - n);
+	memmove(b->b, a->b + n, a->n - n);
+	ldnorm(b);
+}
+
+void
+ldtrunc(ldint *a, int n, ldint *b)
+{
+	ldbits(b, n+1);
+	b->b[n] = 0;
+	if(a->n >= n)
+		memmove(b->b, a->b, n);
+	else{
+		memmove(b->b, a->b, a->n);
+		memset(b->b + a->n, a->b[a->n - 1], n - a->n);
+	}
+	ldnorm(b);
+}
+
+void
+ldxtend(ldint *a, int n, ldint *b)
+{
+	ldbits(b, n);
+	if(a->n >= n)
+		memmove(b->b, a->b, n);
+	else{
+		memmove(b->b, a->b, a->n);
+		memset(b->b + a->n, a->b[a->n - 1], n - a->n);
+	}
+	ldnorm(b);
+}
+
+void
+ldnot(ldint *a, ldint *b)
+{
+	int i;
+	
+	ldbits(b, a->n);
+	for(i = 0; i < a->n; i++)
+		b->b[i] = a->b[i] ^ 1;
+}
+
+u32int xorshift(u32int *state)
+{
+	u32int x = *state;
+	x ^= x << 13;
+	x ^= x >> 17;
+	x ^= x << 5;
+	*state = x;
+	return x;
+}
+
+void
+testgen(int i, ldint *a)
+{
+	u32int state;
+	u32int r;
+	int j;
+
+	if(i < 257)
+		itold(i-128, a);
+	else if(i < 514)
+		pow2told(i-385, a);
+	else{
+		state = i;
+		xorshift(&state);
+		xorshift(&state);
+		xorshift(&state);
+		ldbits(a, Dbits * (1 + (xorshift(&state) & 15)));
+		SET(r);
+		for(j = 0; j < a->n; j++){
+			if((j & 31) == 0)
+				r = xorshift(&state);
+			a->b[j] = r & 1;
+			r >>= 1;
+		}
+	}
+}
diff --git a/sys/src/libmp/test/main.c b/sys/src/libmp/test/main.c
new file mode 100644
index 000000000..e9f0ba6f5
--- /dev/null
+++ b/sys/src/libmp/test/main.c
@@ -0,0 +1,52 @@
+#include <u.h>
+#include <libc.h>
+#include <mp.h>
+#include "dat.h"
+#include "fns.h"
+
+static int
+mpdetfmt(Fmt *f)
+{
+	mpint *a;
+	int i, j;
+	
+	a = va_arg(f->args, mpint *);
+	fmtprint(f, "(sign=%d,top=%d,size=%d,", a->sign, a->top, a->size);
+	for(i=0;i<a->top;){
+		fmtprint(f, "%ullx", (uvlong)a->p[i]);
+		if(++i == a->top) break;
+		fmtrune(f, ',');
+		for(j = i+1; j < a->top;  j++)
+			if(a->p[i] != a->p[j])
+				goto next;
+		fmtprint(f, "...");
+		break;
+	next:;
+	}
+	fmtrune(f, '|');
+	for(i=a->top;i<a->size;){
+		fmtprint(f, "%ullx", (uvlong)a->p[i]);
+		if(++i == a->size) break;
+		fmtrune(f, ',');
+		for(j = i+1; j < a->top;  j++)
+			if(a->p[i] != a->p[j])
+				goto next2;
+		fmtprint(f, "...");
+		break;
+	next2:;
+	}
+	fmtrune(f, ')');
+	return 0;
+}
+
+void
+main()
+{
+	extern int ldfmt(Fmt *);
+
+	fmtinstall('B', mpfmt);
+	fmtinstall(L'β', mpdetfmt);
+	fmtinstall('L', ldfmt);
+	
+	tests();
+}
diff --git a/sys/src/libmp/test/mkfile b/sys/src/libmp/test/mkfile
new file mode 100644
index 000000000..87cb46f5b
--- /dev/null
+++ b/sys/src/libmp/test/mkfile
@@ -0,0 +1,16 @@
+</$objtype/mkfile
+
+TARG=test
+OFILES=\
+	main.$O\
+	ld.$O\
+	gen.tab.$O\
+
+HFILES=dat.h fns.h
+
+CLEANFILES=gen.tab.c
+
+</sys/src/cmd/mkone
+
+gen.tab.c:D: testgen.rc
+	rc testgen.rc >gen.tab.c
diff --git a/sys/src/libmp/test/testgen.rc b/sys/src/libmp/test/testgen.rc
new file mode 100644
index 000000000..ecb98a664
--- /dev/null
+++ b/sys/src/libmp/test/testgen.rc
@@ -0,0 +1,275 @@
+#!/bin/rc
+echo '
+cmp	in	in	retsign
+magcmp	in	in	retsign
+add	in	in	out
+sub	in	in	out
+magadd	in	in	out
+magsub	in	in	out
+and	in	in	out
+bic	in	in	out
+or	in	in	out
+xor	in	in	out
+not	in	out
+left	in	int	out
+right	in	int	out
+asr	in	int	out
+div_	in	in	out	out
+' | sed 's/#.*//g' | awk '
+BEGIN {
+	print "#include <u.h>"
+	print "#include <libc.h>"
+	print "#include <mp.h>"
+	print "#include \"dat.h\""
+	print "#include \"fns.h\""
+}
+function initio()
+{
+	for(j=2;j<=NF;j++){
+		if($j == "in")
+			printf "ldtomp(l%d, m%d);\n", j, j
+		if($j == "out")
+			printf "mptarget(m%d);\n", j
+	}
+}
+function fail0()
+{
+	printf "fprint(2, \"FAIL: mp%s(", $1
+	first = 1
+	for(j=2;j<=NF;j++){
+		if(!first) printf ", "
+		first = 0
+		if($j == "in")
+			printf "%%L"
+		if($j == "int")
+			printf "%%d"
+		if($j == "out")
+			printf "out"
+	}
+	printf "): "
+	if(test) printf "%s: ", test
+}
+function fail1()
+{
+	for(j=2;j<=NF;j++){
+		if($j == "in")
+			printf ", l%d", j
+		if($j == "int")
+			printf ", i%d", j
+	}
+}
+function testarg(ref,i,t)
+{
+	if(t == "in"){
+		printf "if(!ldmpeq(l%d, m%d)){\n", ref, i
+		fail0()
+		printf "arg %d: input corrupted\\n\"", ref - 1
+		fail1()
+		printf ");\n"
+		printf "fail=1;\n}\n"
+	}
+	if(t == "out"){
+		printf "if(m%d->top == 0 && m%d->sign < 0){\n", i, i
+		fail0()
+		printf "arg %d: got -0, shouldn''t happen\\n\"", ref - 1
+		fail1()
+		printf ");\n"
+		print "fail=1;"
+		printf "}else if(m%d->top != 0 && m%d->p[m%d->top - 1] == 0){\n", i, i, i
+		fail0()
+		printf "arg %d: got denormalised result\\n\"", ref - 1
+		fail1()
+		printf ");\n"
+		print "fail=1;"
+		printf "}else if(!ldmpeq(l%d, m%d)){\n", ref, i
+		fail0()
+		printf "arg %d: got %%#B, expected %%L\\n\"", ref - 1
+		fail1()
+		printf ", m%d, l%d);\n", i, ref
+		printf "fail=1;\n"
+		printf "}\n"
+	}
+}
+
+NF > 0 && !($NF ~ /^ret/) {
+	printf "void ld%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "ldint *"
+		if($i == "int")
+			printf "int"
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+
+	printf "void\ntest%s(void)\n{\n", $1
+	print "int fail=0;"
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out"){
+			printf "ldint *l%d = ldnew(0);\n", i
+			printf "mpint *m%d = mpnew(0);\n", i
+		}
+		if($i == "int" || $i == "in")
+			printf "int i%d;\n", i
+	}
+	for(i=2;i<=NF;i++){
+		if($i == "in"){
+			printf "for(i%d=0;i%d<NTEST;i%d++){\n", i, i, i
+			printf "testgen(i%d, l%d);\n", i, i
+		}
+		if($i == "int")
+			printf "for(i%d=-128;i%d<=128;i%d++){\n", i, i, i
+	}
+	
+	test=""
+	printf "ld%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "l%d", i
+		if($i == "int")
+			printf "i%d", i
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+	initio()
+
+	printf "mp%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "m%d", i
+		if($i == "int")
+			printf "i%d", i
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+	
+	for(i=2;i<=NF;i++)
+		testarg(i, i, $i)
+	
+	for(i=2;i<=NF;i++){
+		if($i != "out") continue
+		for(k=2;k<=NF;k++){
+			if($k != "in") continue
+			test="alias "(i-1)" and "(k-1)
+			initio()
+			printf "mp%s(", $1
+			for(l=2;l<=NF;l++){
+				if(l == i){
+					printf "m%d", k
+				}else{
+					if($l == "in" || $l == "out")
+						printf "m%d", l
+					if($l == "int")
+						printf "i%d", l
+				}
+				if(l<NF) printf ", "
+			}
+			printf ");\n"
+			for(l=2;l<=NF;l++)
+				if(l != k && l != i)
+					testarg(l, l, $l)
+			testarg(i, k, "out")
+		}
+	}
+
+	for(i=2;i<=NF;i++)
+		if($i == "in" || $i == "int")
+			printf "}\n"
+	for(i=2;i<=NF;i++)
+		if($i == "in" || $i == "out"){
+			printf "ldfree(l%d);\nmpfree(m%d);\n", i, i
+		}
+	printf "if(!fail) fprint(2, \"mp%s: passed\\n\");\n", $1
+	printf "}\n"
+	tests[ntests++] = $1
+	next
+}
+NF > 0 {
+	sign=$NF=="retsign";
+	NF--
+	printf "int ld%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "ldint *"
+		if($i == "int")
+			printf "int"
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+
+	printf "void\ntest%s(void)\n{\n", $1
+	print "int fail=0;"
+	print "int a, b;"
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out"){
+			printf "ldint *l%d = ldnew(0);\n", i
+			printf "mpint *m%d = mpnew(0);\n", i
+		}
+		if($i == "int" || $i == "in")
+			printf "int i%d;\n", i
+	}
+	for(i=2;i<=NF;i++){
+		if($i == "in"){
+			printf "for(i%d=0;i%d<NTEST;i%d++){\n", i, i, i
+			printf "testgen(i%d, l%d);\n", i, i
+		}
+		if($i == "int")
+			printf "for(i%d=-128;i%d<=128;i%d++){\n", i, i, i
+	}
+	
+	test=""
+	printf "a=ld%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "l%d", i
+		if($i == "int")
+			printf "i%d", i
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+	initio()
+
+	printf "b=mp%s(", $1
+	for(i=2;i<=NF;i++){
+		if($i == "in" || $i == "out")
+			printf "m%d", i
+		if($i == "int")
+			printf "i%d", i
+		if(i<NF) printf ", "
+	}
+	printf ");\n"
+
+	if(sign) printf "if(b<0) b=-1;\nif(b>0) b=1;\n"
+	printf "if(a != b){\n", ref, i
+	fail0()
+	printf "return value: got %%d, expected %%d\\n\""
+	fail1()
+	printf ", b, a);\n"
+	printf "fail=1;\n"
+	printf "}\n"
+	
+	for(i=2;i<=NF;i++)
+		testarg(i, i, $i)
+	
+	for(i=2;i<=NF;i++)
+		if($i == "in" || $i == "int")
+			printf "}\n"
+	for(i=2;i<=NF;i++)
+		if($i == "in" || $i == "out"){
+			printf "ldfree(l%d);\nmpfree(m%d);\n", i, i
+		}
+	printf "if(!fail) fprint(2, \"mp%s: passed\\n\");\n", $1
+	printf "}\n"
+	tests[ntests++] = $1
+}
+END {
+	printf "void\ntests()\n{\n"
+	for(i = 0; i < ntests; i++)
+		printf "test%s();\n", tests[i]
+	printf "}\n"
+}
+' | awk '
+/^[ 	]*}/ { ind = substr(ind, 2) }
+{ printf "%s%s\n", ind, $0 }
+/{ *$/ { ind = "\t" ind }
+'