Patchwork [04/10] softfloat: Add float*_is_any_nan() functions

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Submitter Peter Maydell
Date Dec. 6, 2010, 5 p.m.
Message ID <1291654811-29863-5-git-send-email-peter.maydell@linaro.org>
Download mbox | patch
Permalink /patch/74414/
State New
Headers show

Comments

Peter Maydell - Dec. 6, 2010, 5 p.m.
Add float*_is_any_nan() functions which return true if the argument
is a NaN of any kind (quiet or signalling).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 fpu/softfloat.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
Nathan Froyd - Dec. 6, 2010, 6:15 p.m.
On Mon, Dec 06, 2010 at 05:00:05PM +0000, Peter Maydell wrote:
> Add float*_is_any_nan() functions which return true if the argument
> is a NaN of any kind (quiet or signalling).
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>

-Nathan

Patch

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 9528825..9bece80 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -314,6 +314,11 @@  INLINE int float32_is_zero(float32 a)
     return (float32_val(a) & 0x7fffffff) == 0;
 }
 
+INLINE int float32_is_any_nan(float32 a)
+{
+    return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
+}
+
 #define float32_zero make_float32(0)
 #define float32_one make_float32(0x3f800000)
 #define float32_ln2 make_float32(0x3f317218)
@@ -386,6 +391,11 @@  INLINE int float64_is_zero(float64 a)
     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 }
 
+INLINE int float64_is_any_nan(float64 a)
+{
+    return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
+}
+
 #define float64_zero make_float64(0)
 #define float64_one make_float64(0x3ff0000000000000LL)
 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)