changes for different byte orderings

mach/proto/fp/cmf8.c

@@ -23,8 +23,13 @@ _double	d1,d2;
 	int	sign1,sign2;
 	int	rv;
 
+#if FL_MSL_AT_LOW_ADDRESS
 	l1 = get4((char *)&d1);
 	l2 = get4((char *)&d2);
+#else
+	l1 = get4(((char *)&d1+4));
+	l2 = get4(((char *)&d2+4));
+#endif
 	sign1 = SIGN(l1);
 	sign2 = SIGN(l2);
 	if (sign1 != sign2) {
@@ -39,8 +44,13 @@ _double	d1,d2;
 	}
 	else	{ 		/* decide in 2nd half */
 		unsigned long u1, u2;
+#if FL_MSL_AT_LOW_ADDRESS
 		u1 = get4(((char *)&d1 + 4));
 		u2 = get4(((char *)&d2 + 4));
+#else
+		u1 = get4((char *)&d1);
+		u2 = get4((char *)&d2);
+#endif
 		if (u1 == u2)
 			return(0);
 		if (u1 < u2) rv = 1;

mach/proto/fp/compact.c

@@ -108,8 +108,16 @@ dbl_over:			trap(EFOVFL);
 		 * STORE MANTISSA
 		 */
 
+#if FL_MSL_AT_LOW_ADDRESS
 		put4(DBL->_s.p1.fract, (char *) &DBL->_s.p1.fract);
 		put4(DBL->_s.p2, (char *) &DBL->_s.p2);
+#else
+		{ unsigned long l;
+		  put4(DBL->_s.p2, (char *) &l);
+		  put4(DBL->_s.p1.fract, (char *) &DBL->_s.p2);
+		  DBL->_s.p1.fract = l;
+		}
+#endif
 	}
 	else {
 		/*

mach/proto/fp/extend.c

@@ -52,9 +52,20 @@ zero:			zrf_ext(to);
 			goto zero;
 	}
 /*	there is a number to convert so lets get started	*/
-/*	first extract the exponent; its always in the first two bytes */
 
+#if FL_MSL_AT_LOW_ADDRESS
+#if FL_MSW_AT_LOW_ADDRESS
 	to->exp = uget2(cpt1);
+#else
+	to->exp = uget2(cpt1+2);
+#endif
+#else
+#if FL_MSW_AT_LOW_ADDRESS
+	to->exp = uget2(cpt1+4);
+#else
+	to->exp = uget2(cpt1+6);
+#endif
+#endif
 	to->sign = (to->exp & 0x8000);	/* set sign bit */
 	to->exp ^= to->sign;
 	if (size == sizeof(DOUBLE))
@@ -65,17 +76,23 @@ zero:			zrf_ext(to);
 		leadbit++;	/* will set Lead bit later	*/
 	else to->exp++;
 
-	to->m1 = get4(cpt1);
-
 	if (size == sizeof(DOUBLE))	{
-		to->m1 <<= DBL_M1LEFT;		/* shift	*/
+#if FL_MSL_AT_LOW_ADDRESS
-		to->exp -= DBL_BIAS;		/* remove bias	*/
+		to->m1 = get4(cpt1);
 		cpt1 += 4;
 		tmp = get4(cpt1);
+#else
+		tmp = get4(cpt1);
+		cpt1 += 4;
+		to->m1 = get4(cpt1);
+#endif
+		to->m1 <<= DBL_M1LEFT;		/* shift	*/
+		to->exp -= DBL_BIAS;		/* remove bias	*/
 		to->m1 |= (tmp>>DBL_RPACK);	/* plus 10 == 32	*/
 		to->m2 = (tmp<<DBL_LPACK);	/* plus 22 == 32	*/
 	}
 	else	{	/* size == sizeof(SINGLE)		*/
+		to->m1 = get4(cpt1);
 		to->m1  <<= SGL_M1LEFT;	/* shift	*/
 		to->exp -= SGL_BIAS;		/* remove bias	*/
 		to->m2 = 0L;

mach/proto/fp/get_put.h

@@ -13,7 +13,11 @@
 #define Xchar(ch)	((ch) & 0377)
 #endif
 
-#if ! BYTES_REVERSED
+#define BYTES_REVERSED (MSB_AT_LOW_ADDRESS != FL_MSB_AT_LOW_ADDRESS)
+#define WORDS_REVERSED (MSW_AT_LOW_ADDRESS != FL_MSW_AT_LOW_ADDRESS)
+#define LONGS_REVERSED (FL_MSL_AT_LOW_ADDRESS)
+
+#if BYTES_REVERSED
 #define uget2(c)	(Xchar((c)[1]) | ((unsigned) Xchar((c)[0]) << 8))
 #define Xput2(i, c)	(((c)[1] = (i)), ((c)[0] = (i) >> 8))
 #define put2(i, c)	{ register int j = (i); Xput2(j, c); }
@@ -25,7 +29,7 @@
 
 #define get2(c)		((short) uget2(c))
 
-#if WORDS_REVERSED || ! BYTES_REVERSED
+#if WORDS_REVERSED || BYTES_REVERSED
 #define get4(c)		(uget2((c)+2) | ((long) uget2(c) << 16))
 #define put4(l, c)	{ register long x=(l); \
 			  Xput2((int)x,(c)+2); \

mach/proto/fp/ngf4.c

@@ -9,13 +9,11 @@
 		NEGATE A FLOATING POINT (NGF 4)
 */
 /********************************************************/
-/*
-	Assumes exponent is located in bytes 0 & 1
-*/
-/********************************************************/
 
 #include "FP_types.h"
+#include "get_put.h"
 
+#define OFF ((FL_MSW_AT_LOW_ADDRESS ? 0 : 2) + (FL_MSB_AT_LOW_ADDRESS ? 0 : 1))
 _float
 ngf4(f)
 _float	f;
@@ -23,7 +21,7 @@ _float	f;
 	unsigned char *p;
 
 	if (f != (_float) 0) {
-		p = (unsigned char *) &f;
+		p = (unsigned char *) &f + OFF;
 		*p ^= 0x80;
 	}
 	return f;

mach/proto/fp/ngf8.c

@@ -9,12 +9,11 @@
 		NEGATE A FLOATING POINT (NGF 8)
 */
 /********************************************************/
-/*
-	Assumes exponent is located in bytes 0 & 1
-*/
-/********************************************************/
 
 #include "FP_types.h"
+#include "get_put.h"
+
+#define OFF ((FL_MSL_AT_LOW_ADDRESS ? 0 : 4) + (FL_MSW_AT_LOW_ADDRESS ? 0 : 2) + (FL_MSB_AT_LOW_ADDRESS ? 0 : 1))
 
 _double
 ngf8(f)
@@ -23,7 +22,7 @@ _double	f;
 	unsigned char	*p;
 
 	if (f.__double[0] != 0 || f.__double[1] != 0) {
-		p = (unsigned char *) &f;
+		p = (unsigned char *) &f + OFF;
 		*p ^= 0x80;
 	}
 	return f;

mach/proto/fp/sbf4.c

@@ -11,20 +11,18 @@
 
 #include	"FP_types.h"
 
-extern	_float	adf4();
+extern	_float	adf4(), ngf4();
 
 _float
 sbf4(s2,s1)
 _float	s1,s2;
 {
-	unsigned char *p;
 	_float *result = &s1;	/* s1 may not be in a register! */
 
 	if (s2 == (_float) 0) {
 		return s1;
 	}
-	p = (unsigned char *) &s2;
+	s2 = ngf4(s2);
-	*p ^= 0x80;	/* change sign of s2 */
 	*result = adf4(s2,s1);
 	return(s1);	/* add and return result */
 }

mach/proto/fp/sbf8.c

@@ -11,20 +11,18 @@
 
 #include	"FP_types.h"
 
-extern	_double	adf8();
+extern	_double	adf8(), ngf8();
 
 _double
 sbf8(s2,s1)
 _double	s1,s2;
 {
-	unsigned char *p;		/* sufficient to access sign bit */
 	_double *result = &s1;	/* s1 may not be in a register! */
 
 	if (s2.__double[0] == 0 && s2.__double[1] == 0) {
 		return s1;
 	}
-	p = (unsigned char *) &s2;
+	s2 = ngf8(s2);
-	*p ^= 0x80;	/* change sign of s2 */
 	*result = adf8(s2,s1);	/* add and return result */
 	return(s1);
 }