Changeset e649dfa in mainline

Timestamp:

2005-12-20T16:29:19Z (19 years ago)

Author:

Josef Cejka <malyzelenyhnus@…>

Branches:

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

Children:

ef0aa999

Parents:

7e557805

Message:

Comparison function for float type added.

Location:

softfloat

Files:

• generic/comparison.c (modified) (2 diffs)
• generic/softfloat.c (modified) (1 diff)
• include/comparison.h (modified) (1 diff)

softfloat/generic/comparison.c ¶

@@ -54 +54 @@
 
 /**
- * @return 1, if a>b - but NaNs are not recognized 
+ * @return 1, if a<b - but NaNs are not recognized 
  */
 inline int isFloat32lt(float32 a, float32 b) 
@@ -67 +67 @@
 }
 
+/**
+ * @return 1, if a>b - but NaNs are not recognized 
+ */
+inline int isFloat32gt(float32 a, float32 b) 
+{
+        if (((a.binary| b.binary)&0x7FFFFFFF)==0) {
+                return 0;
+        };
+        a.parts.sign^=a.parts.sign;
+        b.parts.sign^=b.parts.sign;
+        return (a.binary>b.binary);
+                        
+}
 
+

softfloat/generic/softfloat.c ¶

@@ -137 +137 @@
         return __eqsf2(a,b);
 };
+
+/* return value >= 0 if a>=b and neither is NaN */
+int __gesf2(float a, float b)
+{
+        float32 fa,fb;
+        fa.f=a;
+        fb.f=b;
+        if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {
+                /* TODO: sigNaNs*/
+                return 1;
+                };
+        
+        if (isFloat32eq(fa,fb)) {
+                return 0;
+        };
+        
+        if (isFloat32gt(fa,fb)) {
+                return 1;
+                };
+        
+        return -1;
+}
+
+/** Return negative value, if a<b and neither is NaN*/
+int __ltsf2(float a, float b)
+{
+        float32 fa,fb;
+        fa.f=a;
+        fb.f=b;
+        if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {
+                /* TODO: sigNaNs*/
+                return 1;
+                };
+        if (isFloat32lt(fa, fb)) {
+                return -1;
+                };
+        return 0;
+}
+
+/* return value <= 0 if a<=b and neither is NaN */
+int __lesf2(float a, float b)
+{
+        float32 fa,fb;
+        fa.f=a;
+        fb.f=b;
+        if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {
+                /* TODO: sigNaNs*/
+                return 1;
+                };
+        
+        if (isFloat32eq(fa,fb)) {
+                return 0;
+        };
+        
+        if (isFloat32lt(fa,fb)) {
+                return -1;
+                };
+        
+        return 1;
+}
+
+/** Return positive value, if a>b and neither is NaN*/
+int __ltsf2(float a, float b)
+{
+        float32 fa,fb;
+        fa.f=a;
+        fb.f=b;
+        if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {
+                /* TODO: sigNaNs*/
+                return 1;
+                };
+        if (isFloat32gt(fa, fb)) {
+                return 1;
+                };
+        return 0;
+}
+
 /* Other functions */
 

softfloat/include/comparison.h ¶

@@ -33 +33 @@
 inline int isFloat32SigNaN(float32 f);
 
+inline int isFloat32Infinity(float32 f) 
+
+inline int isFloat32eq(float32 a, float32 b);
+inline int isFloat32lt(float32 a, float32 b);
+inline int isFloat32gt(float32 a, float32 b);
+
 #endif