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target/arm: Implement MVE VRHADD

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Implement the MVE VRHADD insn, which performs a rounded halving
addition.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210617121628.20116-40-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-06-17 13:16:23 +01:00
parent 43364321f3
commit 1eb987a89d
4 changed files with 19 additions and 0 deletions
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6
target/arm/mve_helper.c
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@ -531,6 +531,12 @@ DO_2OP_U(vshlu, DO_VSHLU)
DO_2OP_S(vrshls, DO_VRSHLS)
DO_2OP_U(vrshlu, DO_VRSHLU)
#define DO_RHADD_S(N, M) (((int64_t)(N) + (M) + 1) >> 1)
#define DO_RHADD_U(N, M) (((uint64_t)(N) + (M) + 1) >> 1)
DO_2OP_S(vrhadds, DO_RHADD_S)
DO_2OP_U(vrhaddu, DO_RHADD_U)
static inline int32_t do_sat_bhw(int64_t val, int64_t min, int64_t max, bool *s)
{
if (val > max) {