SVE Instruction List by Dougall Johnson
CLZ: Count leading zero bits (predicated)
CLZ Zd.D, Pg/Z, Zn.D (SVE2.2 (SME2.2
128-bit SVE
For each 64-bit integer set (2) to the number of leading zero bits in (1). If (1) is zero, the result is 64.
256-bit SVE
For each 64-bit integer set (2) to the number of leading zero bits in (1). If (1) is zero, the result is 64.
512-bit SVE
For each 64-bit integer set (2) to the number of leading zero bits in (1). If (1) is zero, the result is 64.
Larger sizes
1024-bit SVE
For each 64-bit integer set (2) to the number of leading zero bits in (1). If (1) is zero, the result is 64.
2048-bit SVE
For each 64-bit integer set (2) to the number of leading zero bits in (1). If (1) is zero, the result is 64.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.