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20 Commits

Author SHA1 Message Date
Peter Maydell
37d18660bb 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
processing as well. Implement this, using a new status flag to enable it
and a new exception status bit to indicate when it has happened. Existing
CPUs should be unaffected as there is no behaviour change unless the
mode is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
 2011-01-06 22:16:59 +01:00
Peter Maydell
cbcef455a2 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.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
 2010-12-07 15:37:34 +00:00
Aurelien Jarno
8229c9913a softfloat: add float32_exp2() 
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
 2010-07-13 18:18:23 +02:00
Blue Swirl
ed086f3dde softfloat: remove dead assignments, spotted by clang 
Value stored to 'bSign' is never read.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
 2010-03-07 13:49:58 +00:00
Paul Brook
600114988c ARM FP16 support 
Implement the ARM VFP half precision floating point extensions.

Signed-off-by: Paul Brook <paul@codesourcery.com>
 2009-11-19 16:45:20 +00:00
aurel32
374dfc33e2 soft-float: add float32_log2() and float64_log2() 
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6518 c046a42c-6fe2-441c-8c8c-71466251a162
 2009-02-05 13:42:47 +00:00
pbrook
fe76d97653 Implement flush-to-zero mode (denormal results are replaced with zero). 
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6107 c046a42c-6fe2-441c-8c8c-71466251a162
 2008-12-19 14:33:59 +00:00
pbrook
69397542d6 Correctly normalize values and handle zero inputs to scalbn functions. 
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6102 c046a42c-6fe2-441c-8c8c-71466251a162
 2008-12-19 12:59:28 +00:00
blueswir1
b55266b5a2 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
 2008-09-20 08:07:15 +00:00
blueswir1
1f58732916 128-bit float support for user mode 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3740 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-11-25 18:40:20 +00:00
blueswir1
cd8a25337e Fix more typos in softloat code (Eduardo Felipe) 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3716 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-11-21 18:57:44 +00:00
pbrook
a1b91bb406 Fix typo in softfloat code. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3714 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-11-21 15:32:12 +00:00
pbrook
f090c9d4ad Add strict checking mode for softfp code. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3688 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-11-18 14:33:24 +00:00
pbrook
9ee6e8bb85 ARMv7 support. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3572 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-11-11 00:04:49 +00:00
j_mayer
3430b0be36 Ooops... Typo. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2520 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-03-20 22:25:37 +00:00
j_mayer
75d62a5856 Add missing softfloat helpers. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2518 c046a42c-6fe2-441c-8c8c-71466251a162
 2007-03-20 22:10:42 +00:00
bellard
750afe93fd avoid using char when it is not necessary 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2204 c046a42c-6fe2-441c-8c8c-71466251a162
 2006-10-28 19:27:11 +00:00
pbrook
e6e5906b6e ColdFire target. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2196 c046a42c-6fe2-441c-8c8c-71466251a162
 2006-10-22 00:18:54 +00:00
bellard
1d6bda3561 added abs, chs and compare functions 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1338 c046a42c-6fe2-441c-8c8c-71466251a162
 2005-03-13 18:52:29 +00:00
bellard
158142c2c2 soft float support 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1332 c046a42c-6fe2-441c-8c8c-71466251a162
 2005-03-13 16:54:06 +00:00