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target/arm: Implement MVE VCADD

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Implement the MVE VCADD insn.  Note that here the size bit is the
opposite sense to the other 2-operand fp insns.

We don't check for the sz == 1 && Qd == Qm UNPREDICTABLE case,
because that would mean we can't use the DO_2OP_FP macro in
translate-mve.c.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2021-09-01 09:02:35 +01:00
parent 82af0153d3
commit 104afc68cf
4 changed files with 57 additions and 1 deletions
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8
target/arm/mve.decode
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@ -29,6 +29,8 @@
# 2 operand fp insns have size in bit 20: 1 for 16 bit, 0 for 32 bit,
# like Neon FP insns.
%2op_fp_size 20:1 !function=neon_3same_fp_size
# VCADD is an exception, where bit 20 is 0 for 16 bit and 1 for 32 bit
%2op_fp_size_rev 20:1 !function=plus_1
# 1imm format immediate
%imm_28_16_0 28:1 16:3 0:4
@ -125,6 +127,9 @@
@2op_fp .... .... .... .... .... .... .... .... &2op \
qd=%qd qn=%qn qm=%qm size=%2op_fp_size
@2op_fp_size_rev .... .... .... .... .... .... .... .... &2op \
qd=%qd qn=%qn qm=%qm size=%2op_fp_size_rev
# Vector loads and stores
# Widening loads and narrowing stores:
@ -631,3 +636,6 @@ VABD_fp 1111 1111 0 . 1 . ... 0 ... 0 1101 . 1 . 0 ... 0 @2op_fp
VMAXNM 1111 1111 0 . 0 . ... 0 ... 0 1111 . 1 . 1 ... 0 @2op_fp
VMINNM 1111 1111 0 . 1 . ... 0 ... 0 1111 . 1 . 1 ... 0 @2op_fp
VCADD90_fp 1111 1100 1 . 0 . ... 0 ... 0 1000 . 1 . 0 ... 0 @2op_fp_size_rev
VCADD270_fp 1111 1101 1 . 0 . ... 0 ... 0 1000 . 1 . 0 ... 0 @2op_fp_size_rev