[Qemu-devel] [PATCH 1/2] softfloat: Implement floatx80_is_any_nan() and float128_is_any_nan()

[Peter Maydell]

Implement versions of float*_is_any_nan() for the floatx80 and
float128 types.

Signed-off-by: Peter Maydell <address@hidden>
---
 fpu/softfloat.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index f2104c6..ac81845 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -469,6 +469,11 @@ INLINE int floatx80_is_zero(floatx80 a)
     return (a.high & 0x7fff) == 0 && a.low == 0;
 }
 
+INLINE int floatx80_is_any_nan(floatx80 a)
+{
+    return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
+}
+
 #endif
 
 #ifdef FLOAT128
@@ -536,6 +541,12 @@ INLINE int float128_is_zero(float128 a)
     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 }
 
+INLINE int float128_is_any_nan(float128 a)
+{
+    return ((a.high >> 48) & 0x7fff) == 0x7fff &&
+        ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
+}
+
 #endif
 
 #else /* CONFIG_SOFTFLOAT */
-- 
1.6.3.3