From: Christophe Lyon <christophe.l...@st.com>
These 3 patches fix the ARM Neon vrecpe and vrsqrte instructions by
matching the algorithms descibed in the ARM ARM.
With these patches, qemu passes my ARM/Neon tests.
Patch #1 modifies softfloat by exporting float32_default_nan and
float32_infinity. For consistency, I have also moved all the
target-dependent definitions of floatXX_default_nan to softfloat.h (ie
the 16, 64, x80 and 128 bits versions in addition to the 32 bits
ones).
It also adds float32_set_sign() to help return the right special
values (-0, -infinity).
Patch #2 uses these newly exported values and uses the vrecpe
algorithm described in the ARM ARM.
Patch #3 uses these newly exported values and uses the vrsqrte
algorithm described in the ARM ARM.
Christophe Lyon (3):
softfloat: export float32_default_nan, and float32_infinity. Add
float32_set_sign().
target-arm: fix support for vrecpe.
target-arm: fix support for vrsqrte.
fpu/softfloat-specialize.h | 68 ---------------
fpu/softfloat.h | 75 ++++++++++++++++
target-arm/helper.c | 206 +++++++++++++++++++++++++++++++++++++++-----
3 files changed, 259 insertions(+), 90 deletions(-)
--
1.7.2.3
