[Qemu-devel] [6049] softfloat-native: fix *nan()

[Aurelien Jarno]

Revision: 6049
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6049
Author:   aurel32
Date:     2008-12-15 17:14:12 +0000 (Mon, 15 Dec 2008)

Log Message:
-----------
softfloat-native: fix *nan()

Fix float64_is_nan()
Fix floatx80_is_signaling_nan()
Add floatx80_is_nan()

Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/fpu/softfloat-native.c
    trunk/fpu/softfloat-native.h

Modified: trunk/fpu/softfloat-native.c
===================================================================
--- trunk/fpu/softfloat-native.c        2008-12-15 17:14:05 UTC (rev 6048)
+++ trunk/fpu/softfloat-native.c        2008-12-15 17:14:12 UTC (rev 6049)
@@ -431,7 +431,7 @@
     u.f = a1;
     a = u.i;
 
-    return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) );
+    return ( LIT64( 0xFFF0000000000000 ) < (bits64) ( a<<1 ) );
 
 }
 
@@ -507,7 +507,20 @@
 int floatx80_is_signaling_nan( floatx80 a1)
 {
     floatx80u u;
+    uint64_t aLow;
     u.f = a1;
+
+    aLow = u.i.low & ~ LIT64( 0x4000000000000000 );
+    return
+           ( ( u.i.high & 0x7FFF ) == 0x7FFF )
+        && (bits64) ( aLow<<1 )
+        && ( u.i.low == aLow );
+}
+
+int floatx80_is_nan( floatx80 a1 )
+{
+    floatx80u u;
+    u.f = a1;
     return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );
 }
 

Modified: trunk/fpu/softfloat-native.h
===================================================================
--- trunk/fpu/softfloat-native.h        2008-12-15 17:14:05 UTC (rev 6048)
+++ trunk/fpu/softfloat-native.h        2008-12-15 17:14:12 UTC (rev 6049)
@@ -425,6 +425,7 @@
 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 int floatx80_is_signaling_nan( floatx80 );
+int floatx80_is_nan( floatx80 );
 
 INLINE floatx80 floatx80_abs(floatx80 a)
 {