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target/arm: Implement SCLAMP, UCLAMP

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This is an SVE instruction that operates using the SVE vector
length but that it is present only if SME is implemented.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-31-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:45:25 +05:30 • committed by Peter Maydell
parent 7dbfafc157
commit 6b5a3bdf3a
4 changed files with 149 additions and 0 deletions
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24
target/arm/vec_helper.c
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@ -2690,3 +2690,27 @@ void HELPER(gvec_bfmlal_idx)(void *vd, void *vn, void *vm,
}
clear_tail(d, opr_sz, simd_maxsz(desc));
}
#define DO_CLAMP(NAME, TYPE) \
void HELPER(NAME)(void *d, void *n, void *m, void *a, uint32_t desc) \
{ \
intptr_t i, opr_sz = simd_oprsz(desc); \
for (i = 0; i < opr_sz; i += sizeof(TYPE)) { \
TYPE aa = *(TYPE *)(a + i); \
TYPE nn = *(TYPE *)(n + i); \
TYPE mm = *(TYPE *)(m + i); \
TYPE dd = MIN(MAX(aa, nn), mm); \
*(TYPE *)(d + i) = dd; \
} \
clear_tail(d, opr_sz, simd_maxsz(desc)); \
}
DO_CLAMP(gvec_sclamp_b, int8_t)
DO_CLAMP(gvec_sclamp_h, int16_t)
DO_CLAMP(gvec_sclamp_s, int32_t)
DO_CLAMP(gvec_sclamp_d, int64_t)
DO_CLAMP(gvec_uclamp_b, uint8_t)
DO_CLAMP(gvec_uclamp_h, uint16_t)
DO_CLAMP(gvec_uclamp_s, uint32_t)
DO_CLAMP(gvec_uclamp_d, uint64_t)