--- np2/io/gdc_sub.c	2004/02/21 00:25:33	1.17
+++ np2/io/gdc_sub.c	2004/07/01 11:42:54	1.20
@@ -1,5 +1,7 @@
 #include	"compiler.h"
+#if !defined(DISABLE_MATH_H)
 #include	<math.h>
+#endif
 #include	"cpucore.h"
 #include	"pccore.h"
 #include	"iocore.h"
@@ -14,6 +16,8 @@ enum {
 	RT_TABLEMAX		= (1 << RT_TABLEBIT)
 };
 
+static	UINT16	gdc_rt[RT_TABLEMAX+1];
+
 typedef struct {
 	SINT16	x;
 	SINT16	y;
@@ -23,8 +27,6 @@ typedef struct {
 
 const UINT32 gdcplaneseg[4] = {VRAM_E, VRAM_B, VRAM_R, VRAM_G};
 
-static	UINT16	gdc_rt[RT_TABLEMAX+1];
-
 static const VECTDIR vectdir[16] = {
 					{ 0, 1, 1, 0}, { 1, 1, 1,-1},
 					{ 1, 0, 0,-1}, { 1,-1,-1,-1},
@@ -90,12 +92,14 @@ REG8 gdcbitreverse(REG8 data) {
 
 void gdcsub_initialize(void) {
 
+#if !defined(DISABLE_MATH_H)
 	int		i;
 
 	for (i=0; i<=RT_TABLEMAX; i++) {
 		gdc_rt[i] = (UINT16)((double)(1 << RT_MULBIT) *
 				(1 - sqrt(1 - pow((0.70710678118654 * i) / RT_TABLEMAX, 2))));
 	}
+#endif
 }
 
 void gdcslavewait(NEVENTITEM item) {
@@ -179,7 +183,7 @@ void gdcsub_setvectl(GDCVECT *vect, int 
 			}
 		}
 	}
-	if (ope & 1) {
+	if (!((ope + 1) & 2)) {
 		tmp = dx;
 		dx = dy;
 		dy = tmp;