SVE Instruction List by Dougall Johnson
# CLASTB (scalar): Conditionally extract last element to general-purpose register

CLASTB Wdn, Pg, Wdn, Zm.S (SVE (SME

float32_t svclastb[_n_f32](svbool_t pg, float32_t fallback, svfloat32_t data)

int32_t svclastb[_n_s32](svbool_t pg, int32_t fallback, svint32_t data)

uint32_t svclastb[_n_u32](svbool_t pg, uint32_t fallback, svuint32_t data)

## 128-bit SVE

Set (4) to the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero. If there are no such elements, preserve the value from the low 32-bits of (3), zeroing the high bits.

## 256-bit SVE

Set (4) to the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero. If there are no such elements, preserve the value from the low 32-bits of (3), zeroing the high bits.

## 512-bit SVE

Set (4) to the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero. If there are no such elements, preserve the value from the low 32-bits of (3), zeroing the high bits.

## Larger sizes

## 1024-bit SVE

Set (4) to the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero. If there are no such elements, preserve the value from the low 32-bits of (3), zeroing the high bits.

## 2048-bit SVE

Set (4) to the last (leftmost) 32-bit element from (2) where the corresponding predicate bit in (1) is non-zero. If there are no such elements, preserve the value from the low 32-bits of (3), zeroing the high bits.

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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.