#include "gc.h" intswcmp(const void *a1, const void *a2){	C1 *p1, *p2; 	p1 = (C1*)a1;	p2 = (C1*)a2;	if(p1->val < p2->val)		return -1;	return p1->val > p2->val;} voiddoswit(Node *n){	Case *c;	C1 *q, *iq;	long def, nc, i, isv;	int dup; 	def = 0;	nc = 0;	isv = 0;	for(c = cases; c->link != C; c = c->link) {		if(c->def) {			if(def)				diag(n, "more than one default in switch");			def = c->label;			continue;		}		isv |= c->isv;		nc++;	}	if(isv && !typev[n->type->etype])		warn(n, "32-bit switch expression with 64-bit case constant"); 	iq = alloc(nc*sizeof(C1));	q = iq;	for(c = cases; c->link != C; c = c->link) {		if(c->def)			continue;		q->label = c->label;		if(isv)			q->val = c->val;		else			q->val = (long)c->val;	/* cast ensures correct value for 32-bit switch on 64-bit architecture */		q++;	}	qsort(iq, nc, sizeof(C1), swcmp);	if(debug['W'])	for(i=0; i<nc; i++)		print("case %2ld: = %.8llux\n", i, (vlong)iq[i].val);	dup = 0;	for(i=0; i<nc-1; i++)		if(iq[i].val == iq[i+1].val) {			diag(n, "duplicate cases in switch %lld", (vlong)iq[i].val);			dup = 1;		}	if(dup)		return;	if(def == 0) {		def = breakpc;		nbreak++;	}	swit1(iq, nc, def, n);} voidcasf(void){	Case *c; 	c = alloc(sizeof(*c));	c->link = cases;	cases = c;} longoutlstring(ushort *s, long n){	char buf[2];	int c;	long r; 	if(suppress)		return nstring;	while(nstring & 1)		outstring("", 1);	r = nstring;	while(n > 0) {		c = *s++;		if(align(0, types[TCHAR], Aarg1)) {			buf[0] = c>>8;			buf[1] = c;		} else {			buf[0] = c;			buf[1] = c>>8;		}		outstring(buf, 2);		n -= sizeof(ushort);	}	return r;} voidnullwarn(Node *l, Node *r){	warn(Z, "result of operation not used");	if(l != Z)		cgen(l, Z);	if(r != Z)		cgen(r, Z);} voidieeedtod(Ieee *ieee, double native){	double fr, ho, f;	int exp; 	if(native < 0) {		ieeedtod(ieee, -native);		ieee->h |= 0x80000000L;		return;	}	if(native == 0) {		ieee->l = 0;		ieee->h = 0;		return;	}	fr = frexp(native, &exp);	f = 2097152L;		/* shouldnt use fp constants here */	fr = modf(fr*f, &ho);	ieee->h = ho;	ieee->h &= 0xfffffL;	ieee->h |= (exp+1022L) << 20;	f = 65536L;	fr = modf(fr*f, &ho);	ieee->l = ho;	ieee->l <<= 16;	ieee->l |= (long)(fr*f);}