patch-2.1.97 linux/arch/sparc64/math-emu/quad.h

• Lines: 94
• Date: Tue Apr 14 17:44:21 1998
• Orig file: v2.1.96/linux/arch/sparc64/math-emu/quad.h
• Orig date: Mon Jan 12 15:15:44 1998

diff -u --recursive --new-file v2.1.96/linux/arch/sparc64/math-emu/quad.h linux/arch/sparc64/math-emu/quad.h
@@ -1,12 +1,17 @@
 /*
  * Definitions for IEEE Quad Precision
  */
-
-#if _FP_W_TYPE_SIZE < 64
-#error "Only stud muffins allowed, schmuck."
+#if _FP_W_TYPE_SIZE < 32
+/* It appears to be traditional to abuse 16bitters in these header files... */
+#error "Here's a nickel, kid. Go buy yourself a real computer."
 #endif
 
+#if _FP_W_TYPE_SIZE < 64
+/* This is all terribly experimental and I don't know if it'll work properly -- PMM 02/1998 */
+#define _FP_FRACTBITS_Q         (4*_FP_W_TYPE_SIZE)
+#else
 #define _FP_FRACTBITS_Q		(2*_FP_W_TYPE_SIZE)
+#endif
 
 #define _FP_FRACBITS_Q		113
 #define _FP_FRACXBITS_Q		(_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
@@ -23,6 +28,66 @@
 #define _FP_OVERFLOW_Q		\
 	((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
 
+#if _FP_W_TYPE_SIZE < 64
+
+union _FP_UNION_Q
+{
+   long double flt;
+   struct 
+   {
+#if __BYTE_ORDER == __BIG_ENDIAN
+      unsigned sign : 1;
+      unsigned exp : _FP_EXPBITS_Q;
+      unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
+      unsigned long frac2 : _FP_W_TYPE_SIZE;
+      unsigned long frac1 : _FP_W_TYPE_SIZE;
+      unsigned long frac0 : _FP_W_TYPE_SIZE;
+#else
+      unsigned long frac0 : _FP_W_TYPE_SIZE;
+      unsigned long frac1 : _FP_W_TYPE_SIZE;
+      unsigned long frac2 : _FP_W_TYPE_SIZE;
+      unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
+      unsigned exp : _FP_EXPBITS_Q;
+      unsigned sign : 1;
+#endif /* not bigendian */
+   } bits __attribute__((packed));
+};
+
+
+#define FP_DECL_Q(X)		_FP_DECL(4,X)
+#define FP_UNPACK_RAW_Q(X,val)	_FP_UNPACK_RAW_4(Q,X,val)
+#define FP_PACK_RAW_Q(val,X)	_FP_PACK_RAW_4(Q,val,X)
+
+#define FP_UNPACK_Q(X,val)		\
+  do {					\
+    _FP_UNPACK_RAW_4(Q,X,val);		\
+    _FP_UNPACK_CANONICAL(Q,4,X);	\
+  } while (0)
+
+#define FP_PACK_Q(val,X)		\
+  do {					\
+    _FP_PACK_CANONICAL(Q,4,X);		\
+    _FP_PACK_RAW_4(Q,val,X);		\
+  } while (0)
+
+#define FP_NEG_Q(R,X)		_FP_NEG(Q,4,R,X)
+#define FP_ADD_Q(R,X,Y)		_FP_ADD(Q,4,R,X,Y)
+/* single.h and double.h define FP_SUB_t this way too. However, _FP_SUB is
+ * never defined in op-common.h! Fortunately nobody seems to use the FP_SUB_t 
+ * macros: I suggest a combination of FP_NEG and FP_ADD :-> -- PMM 02/1998
+ */
+#define FP_SUB_Q(R,X,Y)		_FP_SUB(Q,4,R,X,Y)
+#define FP_MUL_Q(R,X,Y)		_FP_MUL(Q,4,R,X,Y)
+#define FP_DIV_Q(R,X,Y)		_FP_DIV(Q,4,R,X,Y)
+#define FP_SQRT_Q(R,X)		_FP_SQRT(Q,4,R,X)
+
+#define FP_CMP_Q(r,X,Y,un)	_FP_CMP(Q,4,r,X,Y,un)
+#define FP_CMP_EQ_Q(r,X,Y)	_FP_CMP_EQ(Q,4,r,X,Y)
+
+#define FP_TO_INT_Q(r,X,rsz,rsg)  _FP_TO_INT(Q,4,r,X,rsz,rsg)
+#define FP_FROM_INT_Q(X,r,rs,rt)  _FP_FROM_INT(Q,4,X,r,rs,rt)
+
+#else   /* not _FP_W_TYPE_SIZE < 64 */
 union _FP_UNION_Q
 {
   long double flt /* __attribute__((mode(TF))) */ ;
@@ -69,3 +134,5 @@
 
 #define FP_TO_INT_Q(r,X,rsz,rsg)  _FP_TO_INT(Q,2,r,X,rsz,rsg)
 #define FP_FROM_INT_Q(X,r,rs,rt)  _FP_FROM_INT(Q,2,X,r,rs,rt)
+
+#endif /* not _FP_W_TYPE_SIZE < 64 */