Changeset cf4a823 in mainline for softfloat/generic/comparison.c

Timestamp:

2005-12-22T12:11:35Z (20 years ago)

Author:

Josef Cejka <malyzelenyhnus@…>

Branches:

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

Children:

75a23abf

Parents:

ef0aa999

Message:

Fixed some bugs in softfloat after tests.

File:

• softfloat/generic/comparison.c (modified) (3 diffs)

softfloat/generic/comparison.c

@@ -50 +50 @@
 inline int isFloat32eq(float32 a, float32 b)
 {
-        return ((a==b)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */
+        return ((a.binary==b.binary)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */
 }
 
@@ -59 +59 @@
 {
         if (((a.binary| b.binary)&0x7FFFFFFF)==0) {
-                return 0;
+                return 0; /* +- zeroes */
         };
-        a.parts.sign^=a.parts.sign;
-        b.parts.sign^=b.parts.sign;
+        
+        if ((a.parts.sign)&&(b.parts.sign)) {
+                /*if both are negative, smaller is that with greater binary value*/
+                return (a.binary>b.binary);
+                };
+        
+        /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/
+        a.parts.sign=!a.parts.sign;
+        b.parts.sign=!b.parts.sign;
         return (a.binary<b.binary);
                         
@@ -73 +80 @@
 {
         if (((a.binary| b.binary)&0x7FFFFFFF)==0) {
-                return 0;
+                return 0; /* zeroes are equal with any sign */
         };
-        a.parts.sign^=a.parts.sign;
-        b.parts.sign^=b.parts.sign;
+        
+        if ((a.parts.sign)&&(b.parts.sign)) {
+                /*if both are negative, greater is that with smaller binary value*/
+                return (a.binary<b.binary);
+                };
+        
+        /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/
+        a.parts.sign=!a.parts.sign;
+        b.parts.sign=!b.parts.sign;
         return (a.binary>b.binary);