* src/SDCCcse.c: partially fixed enhancement request

[fw/sdcc] / device / include / float.h

diff --git a/device/include/float.h b/device/include/float.h
index f76ba54c0af5780f27a3e2f6affafa989c2f70e3..05ad4be7be6bd29618073793337e97cb0dfe6274 100644 (file)
--- a/device/include/float.h
+++ b/device/include/float.h
@@ -24,6 +24,9 @@
 
 #ifndef __SDC51_FLOAT_H
 #define __SDC51_FLOAT_H 1
+
+#include <limits.h>
+
 #define FLT_RADIX       2
 #define FLT_MANT_DIG    24
 #define FLT_EPSILON     1.192092896E-07F
@@ -35,9 +38,60 @@
 #define FLT_MAX         3.402823466E+38F
 #define FLT_MAX_10_EXP  (+38)
 
-#endif
+/* the following deal with IEEE single-precision numbers */
+#define EXCESS         126
+#define SIGNBIT                ((unsigned long)0x80000000)
+#define HIDDEN         (unsigned long)(1ul << 23)
+#define SIGN(fp)       (((unsigned long)(fp) >> (8*sizeof(fp)-1)) & 1)
+#define EXP(fp)                (((unsigned long)(fp) >> 23) & (unsigned int) 0x00FF)
+#define MANT(fp)       (((fp) & (unsigned long)0x007FFFFF) | HIDDEN)
+#define NORM            0xff000000
+#define PACK(s,e,m)    ((s) | ((unsigned long)(e) << 23) | (m))
+
+float __uchar2fs (unsigned char);
+float __schar2fs (signed char);
+float __uint2fs (unsigned int);
+float __sint2fs (signed int);
+float __ulong2fs (unsigned long);
+float __slong2fs (signed long);
+unsigned char __fs2uchar (float);
+signed char __fs2schar (float);
+unsigned int __fs2uint (float);
+signed int __fs2sint (float);
+unsigned long __fs2ulong (float);
+signed long __fs2slong (float);
+
+float __fsadd (float, float);
+float __fssub (float, float);
+float __fsmul (float, float);
+float __fsdiv (float, float);
+
+char __fslt (float, float);
+char __fseq (float, float);
+char __fsgt (float, float);
+
+
+#if defined(SDCC_FLOAT_LIB) && defined(SDCC_mcs51) && !defined(SDCC_USE_XSTACK) && !defined(_SDCC_NO_ASM_LIB_FUNCS)
+
+#define FLOAT_ASM_MCS51
+
+// This adds extra code for proper round-off, in
+// an attempt to match the results from gcc.
+#define FLOAT_FULL_ACCURACY
 
+// This adds about 66 bytes to the code size and
+// significantly speeds up shift operations more
+// than 8 bits (common when subtracting numbers
+// of significantly different magnitude and scaling
+// to fixed point)
+#define FLOAT_SHIFT_SPEEDUP
 
+#define sign_a  psw.1
+#define sign_b  psw.5
+#define exp_a dpl
+#define exp_b dph
+#endif // using mcs51 assembly
 
 
+#endif // __SDC51_FLOAT_H