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# Date Author Comment
87b8cc3c 03/21/2011 10:46 pm Andreas Färber

softfloat: Resolve type mismatches between declaration and implementation

The original SoftFloat 2.0b library avoided the use of custom integer types
in its public headers. This requires the definitions of int{8,16,32,64} to
match the assumptions in the declarations. This breaks on BeOS R5 and Haiku/x86,...

8d725fac 03/21/2011 10:46 pm Andreas Färber

softfloat: Prepend QEMU-style header with derivation notice

The SoftFloat license requires "prominent notice that the work
is derivative". Having added features like improved 16-bit support
for arm already, add such a notice to the sources.

softfloat-native.[ch] are not under the SoftFloat license...

8559666d 02/24/2011 09:53 am Christophe Lyon

softfloat: move all default NaN definitions to softfloat.h.

These special values are needed to implement some helper functions,
which return/use these values in some cases.

Signed-off-by: Christophe Lyon <>
Reviewed-by: Peter Maydell <>...

c30fe7df 02/24/2011 09:53 am Christophe Lyon

softfloat: add _set_sign(), _infinity and _half for 32 and 64 bits floats.

These constants and utility function are needed to implement some
helpers. Defining constants avoids the need to re-compute them at

Signed-off-by: Christophe Lyon <>...

d5138cf4 02/10/2011 09:16 pm Peter Maydell

softfloat: Fix compilation failures with USE_SOFTFLOAT_STRUCT_TYPES

Make softfloat compile with USE_SOFTFLOAT_STRUCT_TYPES defined, by
adding and using new macros const_float16(), const_float32() and
const_float64() so you can use array initializers in an array of...

f591e1be 02/10/2011 07:28 pm Peter Maydell

softfloat: Correctly handle NaNs in float16_to_float32()

Correctly handle NaNs in float16_to_float32(), by defining and
using a float16ToCommonNaN() function, as we do with the other formats.

Signed-off-by: Peter Maydell <>
Signed-off-by: Aurelien Jarno <>

600e30d2 02/10/2011 07:28 pm Peter Maydell

softfloat: Fix single-to-half precision float conversions

Fix various bugs in the single-to-half-precision conversion code: * input NaNs not correctly converted in IEEE mode
(fixed by defining and using a commonNaNToFloat16()) * wrong values returned when converting NaN/Inf into non-IEEE...

bcd4d9af 02/10/2011 07:28 pm Christophe Lyon

softfloat: Honour default_nan_mode for float-to-float conversions

Honour the default_nan_mode flag when doing conversions between
different floating point formats, as well as when returning a NaN from
a two-operand floating point function. This corrects the behaviour...

bb4d4bb3 02/10/2011 07:28 pm Peter Maydell

softfloat: Add float16 type and float16 NaN handling functions

Add a float16 type to softfloat, rather than using bits16 directly.
Also add the missing functions float16_is_quiet_nan(),
float16_is_signaling_nan() and float16_maybe_silence_nan(),
which are needed for the float16 conversion routines....

de4af5f7 01/20/2011 01:37 pm Aurelien Jarno

softfloat: fix floatx80_is_{quiet,signaling}_nan()

floatx80_is_{quiet,signaling}_nan() functions are incorrectly detecting
the type of NaN, depending on SNAN_BIT_IS_ONE, one of the two is
returning the correct value, and the other true for any kind of NaN....

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