[Qemu-devel] [PATCH 0/4] target-arm: Fix VRSQRTS

[Peter Maydell <peter.maydell@linaro.org>]

This patch series fixes various bugs in VRSQRTS including the
major one that it was calculating completely the wrong value
(missing a division by 2).

It also introduces the infrastructure to support the ARM
"Standard FPSCR Value" as used for operations which use "ARM
standard floating-point arithmetic" rather than being controlled
by the rounding/flush/NaN settings in the FPSCR. (Most Neon FP
instructions should be using this, so there will be subsequent
patches to use it with other instructions too.)

The "missing divide" bug was fixed in meego-qemu commit 438a549e0;
the remaining fixes here are new.

Tested in the usual random-instruction-generation fashion.

Peter Maydell (4):
  softfloat: Add float32_is_zero_or_denormal() function
  target-arm: Fix implementation of VRSQRTS
  target-arm: Add support for 'Standard FPSCR Value' as used by Neon
  target-arm: Use the standard FPSCR value for VRSQRTS

 fpu/softfloat.h     |    5 +++++
 target-arm/cpu.h    |   13 +++++++++++++
 target-arm/helper.c |   17 +++++++++++++++--
 3 files changed, 33 insertions(+), 2 deletions(-)