[Qemu-devel] [PATCH v3 0/3] ARM: fix Neon vrecpe and vrsqrte instructions.

[christophe.lyon]

From: Christophe Lyon <address@hidden>

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