SVE Instruction List by Dougall Johnson
# CLS: Count leading sign bits (predicated)

CLS Zd.S, Pg/M, Zn.S (SVE (SME

svuint32_t svcls[_s32]_m(svuint32_t inactive, svbool_t pg, svint32_t op)

## 128-bit SVE

For each 32-bit integer set (2) to the number of leading bits that are equal to the sign bit in (1), excluding the sign bit itself. If (1) is zero or 0xFFFFFFFF, the result is 31.

## 256-bit SVE

For each 32-bit integer set (2) to the number of leading bits that are equal to the sign bit in (1), excluding the sign bit itself. If (1) is zero or 0xFFFFFFFF, the result is 31.

## 512-bit SVE

For each 32-bit integer set (2) to the number of leading bits that are equal to the sign bit in (1), excluding the sign bit itself. If (1) is zero or 0xFFFFFFFF, the result is 31.

## Larger sizes

## 1024-bit SVE

For each 32-bit integer set (2) to the number of leading bits that are equal to the sign bit in (1), excluding the sign bit itself. If (1) is zero or 0xFFFFFFFF, the result is 31.

## 2048-bit SVE

For each 32-bit integer set (2) to the number of leading bits that are equal to the sign bit in (1), excluding the sign bit itself. If (1) is zero or 0xFFFFFFFF, the result is 31.

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