SVE Instruction List by Dougall Johnson
LASTA (SIMD&FP scalar): Extract element after last to SIMD&FP scalar register
LASTA Sd, Pg, Zn.S (SVE (SME
float32_t svlasta[_f32](svbool_t pg, svfloat32_t op)
int32_t svlasta[_s32](svbool_t pg, svint32_t op)
uint32_t svlasta[_u32](svbool_t pg, svuint32_t op)
128-bit SVE
Find the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero, then set (3) to the next element. If all corresponding predicate bits are zero, or the last corresponding predicate bit is non-zero, set (3) to the first (rightmost) element from (1).
256-bit SVE
Find the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero, then set (3) to the next element. If all corresponding predicate bits are zero, or the last corresponding predicate bit is non-zero, set (3) to the first (rightmost) element from (1).
512-bit SVE
Find the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero, then set (3) to the next element. If all corresponding predicate bits are zero, or the last corresponding predicate bit is non-zero, set (3) to the first (rightmost) element from (1).
Larger sizes
1024-bit SVE
Find the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero, then set (3) to the next element. If all corresponding predicate bits are zero, or the last corresponding predicate bit is non-zero, set (3) to the first (rightmost) element from (1).
2048-bit SVE
Find the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero, then set (3) to the next element. If all corresponding predicate bits are zero, or the last corresponding predicate bit is non-zero, set (3) to the first (rightmost) element from (1).
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.