CLS: Count leading sign bits (predicated)

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

svuint8_t svcls[_s8]_m(svuint8_t inactive, svbool_t pg, svint8_t op)

128-bit SVE

For each 8-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 0xFF, the result is 7.

256-bit SVE

For each 8-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 0xFF, the result is 7.

512-bit SVE

For each 8-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 0xFF, the result is 7.

Larger sizes

1024-bit SVE

For each 8-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 0xFF, the result is 7.

2048-bit SVE

For each 8-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 0xFF, the result is 7.

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