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softfloat-macros.h 24.2 kB
softfloat-native.c 11.1 kB
softfloat-native.h 13.2 kB
softfloat-specialize.h 27.1 kB
softfloat.c 218.3 kB
softfloat.h 24.5 kB

Latest revisions

# Date Author Comment
274f1b04 04/03/2011 06:19 pm Peter Maydell

softfloat: Add float*_min() and float*_max() functions

Add min and max operations to softfloat. This allows us to implement
propagation of NaNs and handling of negative zero correctly (unlike
the approach of having target helper routines return one of the operands...
bb98fe42 03/21/2011 10:46 pm Andreas Färber

softfloat: Drop [s]bits{8, 16, 32, 64} types in favor of [u]int{8, 16, 32, 64}_t

They are defined with the same semantics as the POSIX types,
so prefer those for consistency. Suggested by Peter Maydell.

Cc: Peter Maydell <>
Cc: Aurelien Jarno <>...
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
runtime.

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...

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