X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=rts%2FStgPrimFloat.c;h=e523f328c33b14f804acc29fb5ca7088b025e6fd;hp=743e0ea408ab2ba1f0e01f8a801d96bf5392140a;hb=a2a67cd520b9841114d69a87a423dabcb3b4368e;hpb=2016964946f0bff4753295bd4918f98cc1195a7c

diff --git a/rts/StgPrimFloat.c b/rts/StgPrimFloat.c
index 743e0ea..e523f32 100644
--- a/rts/StgPrimFloat.c
+++ b/rts/StgPrimFloat.c
@@ -10,34 +10,18 @@
 #include "PosixSource.h"
 #include "Rts.h"
 
+#include "StgPrimFloat.h"
+
 #include <math.h>
+#include <float.h>
+
+#define IEEE_FLOATING_POINT 1
 
 /*
  * Encoding and decoding Doubles.  Code based on the HBC code
  * (lib/fltcode.c).
  */
 
-#ifdef _SHORT_LIMB
-#define SIZEOF_LIMB_T SIZEOF_UNSIGNED_INT
-#else
-#ifdef _LONG_LONG_LIMB
-#define SIZEOF_LIMB_T SIZEOF_UNSIGNED_LONG_LONG
-#else
-#define SIZEOF_LIMB_T SIZEOF_UNSIGNED_LONG
-#endif
-#endif
-
-#if SIZEOF_LIMB_T == 4
-#define GMP_BASE 4294967296.0
-#elif SIZEOF_LIMB_T == 8
-#define GMP_BASE 18446744073709551616.0
-#else
-#error Cannot cope with SIZEOF_LIMB_T -- please add definition of GMP_BASE
-#endif
-
-#define DNBIGIT	 ((SIZEOF_DOUBLE+SIZEOF_LIMB_T-1)/SIZEOF_LIMB_T)
-#define FNBIGIT	 ((SIZEOF_FLOAT +SIZEOF_LIMB_T-1)/SIZEOF_LIMB_T)
-
 #if IEEE_FLOATING_POINT
 #define MY_DMINEXP  ((DBL_MIN_EXP) - (DBL_MANT_DIG) - 1)
 /* DMINEXP is defined in values.h on Linux (for example) */
@@ -153,66 +137,6 @@ __word_encodeFloat (W_ j, I_ e)
 /* This only supports IEEE floating point */
 
 void
-__decodeDouble (MP_INT *man, I_ *exp, StgDouble dbl)
-{
-    /* Do some bit fiddling on IEEE */
-    unsigned int low, high; 	     	/* assuming 32 bit ints */
-    int sign, iexp;
-    union { double d; unsigned int i[2]; } u;	/* assuming 32 bit ints, 64 bit double */
-
-    ASSERT(sizeof(unsigned int ) == 4            );
-    ASSERT(sizeof(dbl          ) == SIZEOF_DOUBLE);
-    ASSERT(sizeof(man->_mp_d[0]) == SIZEOF_LIMB_T);
-    ASSERT(DNBIGIT*SIZEOF_LIMB_T >= SIZEOF_DOUBLE);
-
-    u.d = dbl;	    /* grab chunks of the double */
-    low = u.i[L];
-    high = u.i[H];
-
-    /* we know the MP_INT* passed in has size zero, so we realloc
-    	no matter what.
-    */
-    man->_mp_alloc = DNBIGIT;
-
-    if (low == 0 && (high & ~DMSBIT) == 0) {
-	man->_mp_size = 0;
-	*exp = 0L;
-    } else {
-	man->_mp_size = DNBIGIT;
-	iexp = ((high >> 20) & 0x7ff) + MY_DMINEXP;
-	sign = high;
-
-	high &= DHIGHBIT-1;
-	if (iexp != MY_DMINEXP)	/* don't add hidden bit to denorms */
-	    high |= DHIGHBIT;
-	else {
-	    iexp++;
-	    /* A denorm, normalize the mantissa */
-	    while (! (high & DHIGHBIT)) {
-		high <<= 1;
-		if (low & DMSBIT)
-		    high++;
-		low <<= 1;
-		iexp--;
-	    }
-	}
-        *exp = (I_) iexp;
-#if DNBIGIT == 2
-	man->_mp_d[0] = (mp_limb_t)low;
-	man->_mp_d[1] = (mp_limb_t)high;
-#else
-#if DNBIGIT == 1
-	man->_mp_d[0] = ((mp_limb_t)high) << 32 | (mp_limb_t)low;
-#else
-#error Cannot cope with DNBIGIT
-#endif
-#endif
-	if (sign < 0)
-	    man->_mp_size = -man->_mp_size;
-    }
-}
-
-void
 __decodeDouble_2Int (I_ *man_sign, W_ *man_high, W_ *man_low, I_ *exp, StgDouble dbl)
 {
     /* Do some bit fiddling on IEEE */
@@ -299,252 +223,3 @@ __decodeFloat_Int (I_ *man, I_ *exp, StgFloat flt)
     }
 }
 
-union stg_ieee754_flt
-{
-   float f;
-   struct {
-
-#if WORDS_BIGENDIAN
-	unsigned int negative:1;
-	unsigned int exponent:8;
-	unsigned int mantissa:23;
-#else
-	unsigned int mantissa:23;
-	unsigned int exponent:8;
-	unsigned int negative:1;
-#endif
-   } ieee;
-   struct {
-
-#if WORDS_BIGENDIAN
-	unsigned int negative:1;
-	unsigned int exponent:8;
-	unsigned int quiet_nan:1;
-	unsigned int mantissa:22;
-#else
-	unsigned int mantissa:22;
-	unsigned int quiet_nan:1;
-	unsigned int exponent:8;
-	unsigned int negative:1;
-#endif
-   } ieee_nan;
-};
-
-/*
- 
- To recap, here's the representation of a double precision
- IEEE floating point number:
-
- sign         63           sign bit (0==positive, 1==negative)
- exponent     62-52        exponent (biased by 1023)
- fraction     51-0         fraction (bits to right of binary point)
-*/
-
-union stg_ieee754_dbl
-{
-   double d;
-   struct {
-
-#if WORDS_BIGENDIAN
-	unsigned int negative:1;
-	unsigned int exponent:11;
-	unsigned int mantissa0:20;
-	unsigned int mantissa1:32;
-#else
-#if FLOAT_WORDS_BIGENDIAN
-	unsigned int mantissa0:20;
-	unsigned int exponent:11;
-	unsigned int negative:1;
-	unsigned int mantissa1:32;
-#else
-	unsigned int mantissa1:32;
-	unsigned int mantissa0:20;
-	unsigned int exponent:11;
-	unsigned int negative:1;
-#endif
-#endif
-   } ieee;
-    /* This format makes it easier to see if a NaN is a signalling NaN.  */
-   struct {
-
-#if WORDS_BIGENDIAN
-	unsigned int negative:1;
-	unsigned int exponent:11;
-	unsigned int quiet_nan:1;
-	unsigned int mantissa0:19;
-	unsigned int mantissa1:32;
-#else
-#if FLOAT_WORDS_BIGENDIAN
-	unsigned int mantissa0:19;
-	unsigned int quiet_nan:1;
-	unsigned int exponent:11;
-	unsigned int negative:1;
-	unsigned int mantissa1:32;
-#else
-	unsigned int mantissa1:32;
-	unsigned int mantissa0:19;
-	unsigned int quiet_nan:1;
-	unsigned int exponent:11;
-	unsigned int negative:1;
-#endif
-#endif
-   } ieee_nan;
-};
-
-/*
- * Predicates for testing for extreme IEEE fp values. Used
- * by the bytecode evaluator and the Prelude.
- *
- */ 
-
-/* In case you don't suppport IEEE, you'll just get dummy defs.. */
-#ifdef IEEE_FLOATING_POINT
-
-StgInt
-isDoubleNaN(StgDouble d)
-{
-  union stg_ieee754_dbl u;
-  
-  u.d = d;
-
-  return (
-    u.ieee.exponent  == 2047 /* 2^11 - 1 */ &&  /* Is the exponent all ones? */
-    (u.ieee.mantissa0 != 0 || u.ieee.mantissa1 != 0)
-    	/* and the mantissa non-zero? */
-    );
-}
-
-StgInt
-isDoubleInfinite(StgDouble d)
-{
-    union stg_ieee754_dbl u;
-
-    u.d = d;
-
-    /* Inf iff exponent is all ones, mantissa all zeros */
-    return (
-        u.ieee.exponent  == 2047 /* 2^11 - 1 */ &&
-	u.ieee.mantissa0 == 0 		        &&
-	u.ieee.mantissa1 == 0
-      );
-}
-
-StgInt
-isDoubleDenormalized(StgDouble d) 
-{
-    union stg_ieee754_dbl u;
-
-    u.d = d;
-
-    /* A (single/double/quad) precision floating point number
-       is denormalised iff:
-        - exponent is zero
-	- mantissa is non-zero.
-        - (don't care about setting of sign bit.)
-
-    */
-    return (  
-	u.ieee.exponent  == 0 &&
-	(u.ieee.mantissa0 != 0 ||
-	 u.ieee.mantissa1 != 0)
-      );
-	 
-}
-
-StgInt
-isDoubleNegativeZero(StgDouble d) 
-{
-    union stg_ieee754_dbl u;
-
-    u.d = d;
-    /* sign (bit 63) set (only) => negative zero */
-
-    return (
-    	u.ieee.negative  == 1 &&
-	u.ieee.exponent  == 0 &&
-	u.ieee.mantissa0 == 0 &&
-	u.ieee.mantissa1 == 0);
-}
-
-/* Same tests, this time for StgFloats. */
-
-/*
- To recap, here's the representation of a single precision
- IEEE floating point number:
-
- sign         31           sign bit (0 == positive, 1 == negative)
- exponent     30-23        exponent (biased by 127)
- fraction     22-0         fraction (bits to right of binary point)
-*/
-
-
-StgInt
-isFloatNaN(StgFloat f)
-{
-    union stg_ieee754_flt u;
-    u.f = f;
-
-   /* Floating point NaN iff exponent is all ones, mantissa is
-      non-zero (but see below.) */
-   return (
-   	u.ieee.exponent == 255 /* 2^8 - 1 */ &&
-	u.ieee.mantissa != 0);
-}
-
-StgInt
-isFloatInfinite(StgFloat f)
-{
-    union stg_ieee754_flt u;
-    u.f = f;
-  
-    /* A float is Inf iff exponent is max (all ones),
-       and mantissa is min(all zeros.) */
-    return (
-    	u.ieee.exponent == 255 /* 2^8 - 1 */ &&
-	u.ieee.mantissa == 0);
-}
-
-StgInt
-isFloatDenormalized(StgFloat f)
-{
-    union stg_ieee754_flt u;
-    u.f = f;
-
-    /* A (single/double/quad) precision floating point number
-       is denormalised iff:
-        - exponent is zero
-	- mantissa is non-zero.
-        - (don't care about setting of sign bit.)
-
-    */
-    return (
-    	u.ieee.exponent == 0 &&
-	u.ieee.mantissa != 0);
-}
-
-StgInt
-isFloatNegativeZero(StgFloat f) 
-{
-    union stg_ieee754_flt u;
-    u.f = f;
-
-    /* sign (bit 31) set (only) => negative zero */
-    return (
-	u.ieee.negative      &&
-	u.ieee.exponent == 0 &&
-	u.ieee.mantissa == 0);
-}
-
-#else /* ! IEEE_FLOATING_POINT */
-
-/* Dummy definitions of predicates - they all return false */
-StgInt isDoubleNaN(d) StgDouble d; { return 0; }
-StgInt isDoubleInfinite(d) StgDouble d; { return 0; }
-StgInt isDoubleDenormalized(d) StgDouble d; { return 0; }
-StgInt isDoubleNegativeZero(d) StgDouble d; { return 0; }
-StgInt isFloatNaN(f) StgFloat f; { return 0; }
-StgInt isFloatInfinite(f) StgFloat f; { return 0; }
-StgInt isFloatDenormalized(f) StgFloat f; { return 0; }
-StgInt isFloatNegativeZero(f) StgFloat f; { return 0; }
-
-#endif /* ! IEEE_FLOATING_POINT */