Changeset 1d83419 in mainline for softfloat/generic/conversion.c

Timestamp:

2006-02-24T17:27:19Z (19 years ago)

Author:

Josef Cejka <malyzelenyhnus@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ba5870d

Parents:

a82695c

Message:

32 bit integers to float type conversions.

File:

• softfloat/generic/conversion.c (modified) (2 diffs)

softfloat/generic/conversion.c

@@ -30 +30 @@
 #include "conversion.h"
 #include "comparison.h"
+#include "common.h"
 
 float64 convertFloat32ToFloat64(float32 a) 
@@ -386 +387 @@
 }       
 
-
+        
+/** Convert unsigned integer to float32
+ *
+ *
+ */
+float32 uint32_to_float32(__u32 i)
+{
+        int counter;
+        __s32 exp;
+        float32 result;
+        
+        result.parts.sign = 0;
+        result.parts.fraction = 0;
+
+        counter = countZeroes32(i);
+
+        exp = FLOAT32_BIAS + 32 - counter - 1;
+        
+        if (counter == 32) {
+                result.binary = 0;
+                return result;
+        }
+        
+        if (counter > 0) {
+                i <<= counter - 1;
+        } else {
+                i >>= 1;
+        }
+
+        roundFloat32(&exp, &i);
+
+        result.parts.fraction = i >> 7;
+        result.parts.exp = exp;
+
+        return result;
+}
+
+float32 int32_to_float32(__s32 i) 
+{
+        float32 result;
+
+        if (i < 0) {
+                result = uint32_to_float32((__u32)(-i));
+        } else {
+                result = uint32_to_float32((__u32)i);
+        }
+        
+        result.parts.sign = i < 0;
+
+        return result;
+}
+
+
+float32 uint64_to_float32(__u64 i) 
+{
+}
+
+float32 int64_to_float32(__s64 i) 
+{
+        float32 result;
+
+        if (i < 0) {
+                result = uint64_to_float32((__u64)(-i));
+        } else {
+                result = uint64_to_float32((__u64)i);
+        }
+        
+        result.parts.sign = i < 0;
+
+        return result;
+}