[PATCH 13/17][ARM] Add VFP FP16 instrinsics.

[Matthew Wahab]

The ARMv8.2-A architecture introduces an optional FP16 extension adding
half-precision floating point data processing instructions to the
existing scalar (floating point) support. A future version of the ACLE
will add support for these instructions and this patch implements that
support.

The ACLE will introduce new intrinsics for the scalar (floating-point)
instructions together with a new header file arm_fp16.h. The ACLE will
require that the intrinsics are available when both the header file is
included and the ACLE feature macro __ARM_FEATURE_FP16_SCALAR_ARITHMETIC
is defined. (The new ACLE feature macros are dealt with in an earlier
patch.)

The patch adds the arm_fp16.h header file with the following new
intrinsics:
----
float16_t vabsh_f16 (float16_t __a)
int32_t vcvtah_s32_f16 (float16_t __a)
uint32_t vcvtah_u32_f16 (float16_t __a)
float16_t vcvth_f16_s32 (int32_t __a)
float16_t vcvth_f16_u32 (uint32_t __a)
int32_t vcvth_s32_f16 (float16_t __a)
uint32_t vcvth_u32_f16 (float16_t __a)
int32_t vcvtmh_s32_f16 (float16_t __a)
uint32_t vcvtmh_u32_f16 (float16_t __a)
int32_t vcvtnh_s32_f16 (float16_t __a)
uint32_t vcvtnh_u32_f16 (float16_t __a)
int32_t vcvtph_s32_f16 (float16_t __a)
uint32_t vcvtph_u32_f16 (float16_t __a)
float16_t vnegh_f16 (float16_t __a)
float16_t vrndah_f16 (float16_t __a)
float16_t vrndh_f16 (float16_t __a)
float16_t vrndih_f16 (float16_t __a)
float16_t vrndmh_f16 (float16_t __a)
float16_t vrndnh_f16 (float16_t __a)
float16_t vrndph_f16 (float16_t __a)
float16_t vrndxh_f16 (float16_t __a)
float16_t vsqrth_f16 (float16_t __a)

float16_t vaddh_f16 (float16_t __a, float16_t __b)
float16_t vcvth_n_f16_s32 (int32_t __a, const int __b)
float16_t vcvth_n_f16_u32 (uint32_t __a, const int __b)
int32_t vcvth_n_s32_f16 (float16_t __a, const int __b)
uint32_t vcvth_n_u32_f16 (float16_t __a, const int __b)
float16_t vdivh_f16 (float16_t __a, float16_t __b)
float16_t vmaxnmh_f16 (float16_t __a, float16_t __b)
float16_t vminnmh_f16 (float16_t __a, float16_t __b)
float16_t vmulh_f16 (float16_t __a, float16_t __b)
float16_t vsubh_f16 (float16_t __a, float16_t __b)

float16_t vfmah_f16 (float16_t __a, float16_t __b, float16_t __c)
float16_t vfmsh_f16 (float16_t __a, float16_t __b, float16_t __c)
----

Tested the series for arm-none-linux-gnueabihf with native bootstrap and
make check and for arm-none-eabi and armeb-none-eabi with make check on
an ARMv8.2-A emulator.

Ok for trunk?
Matthew

2016-05-17  Matthew Wahab  <matthew.wahab@arm.com>

	* config.gcc (extra_headers): Add arm_fp16.h
	* config/arm/arm_fp16.h: New.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0013-PATCH-13-17-ARM-Add-VFP-FP16-instrinsics.patch
Type: text/x-patch
Size: 8252 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20160517/4c2bfe2c/attachment.bin>