[AArch64] Add ARMv8.2-A FP16 scalar instructions

Description

[AArch64] Add ARMv8.2-A FP16 scalar instructions

ARMv8.2-A adds 16-bit floating point versions of all existing VFP
floating-point instructions. This is an optional extension, so all of
these instructions require the FeatureFullFP16 subtarget feature.

Most of these instructions are the same as the 32- and 64-bit versions,
but with the type field (bits 23-22) set to 0b11. Previously the top bit
of the size field was always 0, so the instruction classes only provided
a 1-bit size field, which I have widened to 2 bits.

Differential Revision: http://reviews.llvm.org/D15014

Details

Committed
olista01Nov 27 2015, 5:04 AM
Differential Revision
D15014: [AArch64] Add ARMv8.2-A FP16 scalar instructions
Parents
rL254197: [compiler-rt] [dfsan] Unify aarch64 mapping
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