Architectures that don't have signaling NaNs can define
NO_SIGNALING_NANS, it will make float*_is_quiet_nan return 1 for any NaN
and float*_is_signaling_nan always return 0.
Signed-off-by: Max Filippov <jcmvb...@gmail.com>
---
fpu/softfloat-specialize.h | 64 ++++++++++++++++++++++++++++++++++++++++++++
fpu/softfloat.h | 5 +++
2 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h
index 4902450..2b203b9 100644
--- a/fpu/softfloat-specialize.h
+++ b/fpu/softfloat-specialize.h
@@ -41,6 +41,10 @@ these four paragraphs for those parts of this code that are
retained.
#define SNAN_BIT_IS_ONE 0
#endif
+#if defined(TARGET_XTENSA)
+#define NO_SIGNALING_NANS 1
+#endif
+
/*----------------------------------------------------------------------------
| The pattern for a default generated half-precision NaN.
*----------------------------------------------------------------------------*/
@@ -127,6 +131,17 @@ typedef struct {
uint64_t high, low;
} commonNaNT;
+#ifdef NO_SIGNALING_NANS
+int float16_is_quiet_nan(float16 a_)
+{
+ return float16_is_any_nan(a_);
+}
+
+int float16_is_signaling_nan(float16 a_)
+{
+ return 0;
+}
+#else
/*----------------------------------------------------------------------------
| Returns 1 if the half-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.
@@ -156,6 +171,7 @@ int float16_is_signaling_nan(float16 a_)
return (((a >> 9) & 0x3F) == 0x3E) && (a & 0x1FF);
#endif
}
+#endif
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the half-precision floating point value `a' is a
@@ -217,6 +233,17 @@ static float16 commonNaNToFloat16(commonNaNT a
STATUS_PARAM)
}
}
+#ifdef NO_SIGNALING_NANS
+int float32_is_quiet_nan(float32 a_)
+{
+ return float32_is_any_nan(a_);
+}
+
+int float32_is_signaling_nan(float32 a_)
+{
+ return 0;
+}
+#else
/*----------------------------------------------------------------------------
| Returns 1 if the single-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.
@@ -246,6 +273,7 @@ int float32_is_signaling_nan( float32 a_ )
return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
#endif
}
+#endif
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the single-precision floating point value `a' is a
@@ -586,6 +614,17 @@ static float32 propagateFloat32MulAddNaN(float32 a,
float32 b,
}
}
+#ifdef NO_SIGNALING_NANS
+int float64_is_quiet_nan(float64 a_)
+{
+ return float64_is_any_nan(a_);
+}
+
+int float64_is_signaling_nan(float64 a_)
+{
+ return 0;
+}
+#else
/*----------------------------------------------------------------------------
| Returns 1 if the double-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.
@@ -619,6 +658,7 @@ int float64_is_signaling_nan( float64 a_ )
&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
#endif
}
+#endif
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the double-precision floating point value `a' is a
@@ -773,6 +813,17 @@ static float64 propagateFloat64MulAddNaN(float64 a,
float64 b,
}
}
+#ifdef NO_SIGNALING_NANS
+int floatx80_is_quiet_nan(floatx80 a_)
+{
+ return floatx80_is_any_nan(a_);
+}
+
+int floatx80_is_signaling_nan(floatx80 a_)
+{
+ return 0;
+}
+#else
/*----------------------------------------------------------------------------
| Returns 1 if the extended double-precision floating-point value `a' is a
| quiet NaN; otherwise returns 0. This slightly differs from the same
@@ -816,6 +867,7 @@ int floatx80_is_signaling_nan( floatx80 a )
&& ( a.low == aLow );
#endif
}
+#endif
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the extended double-precision floating point value
@@ -929,6 +981,17 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80
b STATUS_PARAM)
}
}
+#ifdef NO_SIGNALING_NANS
+int float128_is_quiet_nan(float128 a_)
+{
+ return float128_is_any_nan(a_);
+}
+
+int float128_is_signaling_nan(float128 a_)
+{
+ return 0;
+}
+#else
/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.
@@ -964,6 +1027,7 @@ int float128_is_signaling_nan( float128 a )
&& ( a.low || ( a.high & LIT64( 0x00007FFFFFFFFFFF ) ) );
#endif
}
+#endif
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the quadruple-precision floating point value `a' is
diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 2860ca0..d8999b3 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -251,6 +251,11 @@ int float16_is_quiet_nan( float16 );
int float16_is_signaling_nan( float16 );
float16 float16_maybe_silence_nan( float16 );
+INLINE int float16_is_any_nan(float16 a)
+{
+ return ((float16_val(a) & ~0x8000) > 0x7c00);
+}
+
/*----------------------------------------------------------------------------
| The pattern for a default generated half-precision NaN.
*----------------------------------------------------------------------------*/
--
1.7.7.6
