SVE Instruction List by Dougall Johnson
LASTA (scalar): Extract element after last to general-purpose register
LASTA Wd, Pg, Zn.B (SVE (SME
int8_t svlasta[_s8](svbool_t pg, svint8_t op)
uint8_t svlasta[_u8](svbool_t pg, svuint8_t op)
128-bit SVE
Find the last (leftmost) 8-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) 8-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) 8-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) 8-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) 8-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.