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# Date Author Comment
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...
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....
37d18660 01/06/2011 11:16 pm Peter Maydell

softfloat: Implement flushing input denormals to zero

Add support to softfloat for flushing input denormal float32 and float64
to zero. softfloat's existing 'flush_to_zero' flag only flushes denormals
to zero on output. Some CPUs need input denormals to be flushed before...
cbcef455 12/07/2010 05:37 pm Peter Maydell

softfloat: Add float/double to 16 bit integer conversion functions

The ARM architecture needs float/double to 16 bit integer conversions.
(The 32 bit versions aren't sufficient because of the requirement
to saturate at 16 bit MAXINT/MININT and to get the exception bits right.)...
8229c991 07/13/2010 07:18 pm Aurelien Jarno

softfloat: add float32_exp2()

Signed-off-by: Aurelien Jarno <>
ed086f3d 03/07/2010 03:49 pm Blue Swirl

softfloat: remove dead assignments, spotted by clang

Value stored to 'bSign' is never read.

Signed-off-by: Blue Swirl <>
60011498 11/19/2009 06:45 pm Paul Brook

ARM FP16 support

Implement the ARM VFP half precision floating point extensions.

Signed-off-by: Paul Brook <>
374dfc33 02/05/2009 03:42 pm aurel32

soft-float: add float32_log2() and float64_log2()

Signed-off-by: Aurelien Jarno <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6518 c046a42c-6fe2-441c-8c8c-71466251a162
fe76d976 12/19/2008 04:33 pm pbrook

Implement flush-to-zero mode (denormal results are replaced with zero).

Signed-off-by: Paul Brook <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6107 c046a42c-6fe2-441c-8c8c-71466251a162
69397542 12/19/2008 02:59 pm pbrook

Correctly normalize values and handle zero inputs to scalbn functions.

Signed-off-by: Paul Brook <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6102 c046a42c-6fe2-441c-8c8c-71466251a162
b55266b5 09/20/2008 11:07 am blueswir1

Suppress gcc 4.x -Wpointer-sign (included in -Wall) warnings

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5275 c046a42c-6fe2-441c-8c8c-71466251a162
1f587329 11/25/2007 08:40 pm blueswir1

128-bit float support for user mode

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3740 c046a42c-6fe2-441c-8c8c-71466251a162
cd8a2533 11/21/2007 08:57 pm blueswir1

Fix more typos in softloat code (Eduardo Felipe)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3716 c046a42c-6fe2-441c-8c8c-71466251a162
a1b91bb4 11/21/2007 05:32 pm pbrook

Fix typo in softfloat code.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3714 c046a42c-6fe2-441c-8c8c-71466251a162
f090c9d4 11/18/2007 04:33 pm pbrook

Add strict checking mode for softfp code.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3688 c046a42c-6fe2-441c-8c8c-71466251a162
9ee6e8bb 11/11/2007 02:04 am pbrook

ARMv7 support.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3572 c046a42c-6fe2-441c-8c8c-71466251a162
3430b0be 03/21/2007 12:25 am j_mayer

Ooops... Typo.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2520 c046a42c-6fe2-441c-8c8c-71466251a162
75d62a58 03/21/2007 12:10 am j_mayer

Add missing softfloat helpers.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2518 c046a42c-6fe2-441c-8c8c-71466251a162
750afe93 10/28/2006 10:27 pm bellard

avoid using char when it is not necessary

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2204 c046a42c-6fe2-441c-8c8c-71466251a162
e6e5906b 10/22/2006 03:18 am pbrook

ColdFire target.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2196 c046a42c-6fe2-441c-8c8c-71466251a162
1d6bda35 03/13/2005 08:52 pm bellard

added abs, chs and compare functions

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1338 c046a42c-6fe2-441c-8c8c-71466251a162
158142c2 03/13/2005 06:54 pm bellard

soft float support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1332 c046a42c-6fe2-441c-8c8c-71466251a162