SVE Instruction List by Dougall Johnson
UQDECP (scalar): Unsigned saturating decrement scalar by count of true predicate elements
UQDECP Wdn, Pm.D (SVE (SME
uint32_t svqdecp[_n_u32]_b64(uint32_t op, svbool_t pg)
128-bit SVE

Considering only predicate bits from (1) corresponding to 64-bit elements, set (3) to (2) − popcount( (1) ), with unsigned saturation to zero.
256-bit SVE

Considering only predicate bits from (1) corresponding to 64-bit elements, set (3) to (2) − popcount( (1) ), with unsigned saturation to zero.
512-bit SVE

Considering only predicate bits from (1) corresponding to 64-bit elements, set (3) to (2) − popcount( (1) ), with unsigned saturation to zero.
Larger sizes
1024-bit SVE

Considering only predicate bits from (1) corresponding to 64-bit elements, set (3) to (2) − popcount( (1) ), with unsigned saturation to zero.
2048-bit SVE

Considering only predicate bits from (1) corresponding to 64-bit elements, set (3) to (2) − popcount( (1) ), with unsigned saturation to zero.
Report mistakes or give feedback
Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.