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| author | Richard Henderson <richard.henderson@linaro.org> | 2018-06-15 14:57:14 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-06-15 15:23:34 +0100 |
| commit | ef23cb726dc32375bc2fca7ac3e9f34816f6ee13 (patch) | |
| tree | fce4317eb82a0e7e4e42c6e73db131129f6e8f10 /target/arm/sve_helper.c | |
| parent | 3ca879aeb3412bc2be35d01a7bedf5fada960b5d (diff) | |
| download | qemu-ef23cb726dc32375bc2fca7ac3e9f34816f6ee13.zip qemu-ef23cb726dc32375bc2fca7ac3e9f34816f6ee13.tar.gz qemu-ef23cb726dc32375bc2fca7ac3e9f34816f6ee13.tar.bz2 | |
target/arm: Implement SVE conditionally broadcast/extract element
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180613015641.5667-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/sve_helper.c')
| -rw-r--r-- | target/arm/sve_helper.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index ed3c6d4..cb7d101 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -2070,3 +2070,15 @@ void HELPER(sve_compact_d)(void *vd, void *vn, void *vg, uint32_t desc) d[j] = 0; } } + +/* Similar to the ARM LastActiveElement pseudocode function, except the + * result is multiplied by the element size. This includes the not found + * indication; e.g. not found for esz=3 is -8. + */ +int32_t HELPER(sve_last_active_element)(void *vg, uint32_t pred_desc) +{ + intptr_t oprsz = extract32(pred_desc, 0, SIMD_OPRSZ_BITS) + 2; + intptr_t esz = extract32(pred_desc, SIMD_DATA_SHIFT, 2); + + return last_active_element(vg, DIV_ROUND_UP(oprsz, 8), esz); +} |