X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ffltcalc.c;h=d6105a8972817303daeca99dd561e5a82658d86e;hb=0f234e2d94155d13c0e4727871125beda0eaa66d;hp=639f84815882d58cca619baaffd2804f9bdecc90;hpb=a7a3ee1e12b2d3854a5600a69d8bd14ac3369fc4;p=libfirm

diff --git a/ir/tv/fltcalc.c b/ir/tv/fltcalc.c
index 639f84815..d6105a897 100644
--- a/ir/tv/fltcalc.c
+++ b/ir/tv/fltcalc.c
@@ -24,21 +24,18 @@
  * @author   Mathias Heil
  * @version  $Id$
  */
-
 #include "config.h"
 
 #include "fltcalc.h"
 #include "strcalc.h"
 
-#include <math.h>    /* need isnan() and isinf() (will be changed)*/
+#include <math.h>
 /* undef some reused constants defined by math.h */
 #ifdef NAN
 #  undef NAN
 #endif
 
-#ifdef HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
+#include <inttypes.h>
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -1228,6 +1225,12 @@ fp_value *fc_cast(const fp_value *value, const ieee_descriptor_t *desc, fp_value
 		else
 			return fc_get_snan(desc, result);
 	}
+	else if(value->desc.clss == INF) {
+		if (value->sign == 0)
+			return fc_get_plusinf(desc, result);
+		else
+			return fc_get_minusinf(desc, result);
+	}
 
 	/* set the descriptor of the new value */
 	result->desc.exponent_size = desc->exponent_size;
@@ -1329,7 +1332,10 @@ fp_value *fc_get_qnan(const ieee_descriptor_t *desc, fp_value *result) {
 	return result;
 }
 
-fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result) {
+fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result)
+{
+	char *mant;
+
 	if (result == NULL) result = calc_buffer;
 
 	result->desc.exponent_size = desc->exponent_size;
@@ -1341,7 +1347,11 @@ fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result) {
 
 	sc_val_from_ulong((1 << desc->exponent_size) - 1, _exp(result));
 
-	sc_val_from_ulong(0, _mant(result));
+	mant = _mant(result);
+	sc_val_from_ulong(0, mant);
+	if (desc->explicit_one) {
+		sc_set_bit_at(mant, result->desc.mantissa_size + ROUNDING_BITS);
+	}
 
 	return result;
 }
@@ -1685,27 +1695,34 @@ fp_value *fc_rnd(const fp_value *a, fp_value *result) {
 /*
  * convert a floating point value into an sc value ...
  */
-int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode) {
+int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode)
+{
 	if (a->desc.clss == NORMAL) {
 		int exp_bias = (1 << (a->desc.exponent_size - 1)) - 1;
 		int exp_val  = sc_val_to_long(_exp(a)) - exp_bias;
 		int shift, highest;
 		int mantissa_size;
+		int tgt_bits;
 
 		if (a->sign && !mode_is_signed(dst_mode)) {
 			/* FIXME: for now we cannot convert this */
 			return 0;
 		}
 
+		tgt_bits = get_mode_size_bits(dst_mode);
+		if (mode_is_signed(dst_mode))
+			--tgt_bits;
+
 		assert(exp_val >= 0 && "floating point value not integral before fc_flt2int() call");
 		mantissa_size = a->desc.mantissa_size + ROUNDING_BITS;
 		shift         = exp_val - mantissa_size;
 
-		mantissa_size += 1;
+		if (tgt_bits < mantissa_size + 1)
+			tgt_bits = mantissa_size + 1;
 		if (shift > 0) {
-			sc_shlI(_mant(a),  shift, mantissa_size, 0, result);
+			sc_shlI(_mant(a),  shift, tgt_bits, 0, result);
 		} else {
-			sc_shrI(_mant(a), -shift, mantissa_size, 0, result);
+			sc_shrI(_mant(a), -shift, tgt_bits, 0, result);
 		}
 
 		/* check for overflow */