SVE Instruction List by Dougall Johnson
SQRSHRUNT: Signed saturating rounding shift right unsigned narrow by immediate (top)
SQRSHRUNT Zd.S, Zn.D, #const (SVE2 (SME
svuint32_t svqrshrunt[_n_s64](svuint32_t even, svint64_t op1, uint64_t imm2)
128-bit SVE
For each signed 64-bit integer set the odd 32-bit elements of (2) to ( (1) + ( 1 << ( const − 1 ) ) >> const, with unsigned saturation to 0 (if (1) is negative) or 0xFFFFFFFF, preserving even elements. This is the same as a regular shift, but with result incremented if the most-significant bit that was shifted out was set. The shift amount is limited to 1 ≤ const ≤ 32.
256-bit SVE
For each signed 64-bit integer set the odd 32-bit elements of (2) to ( (1) + ( 1 << ( const − 1 ) ) >> const, with unsigned saturation to 0 (if (1) is negative) or 0xFFFFFFFF, preserving even elements. This is the same as a regular shift, but with result incremented if the most-significant bit that was shifted out was set. The shift amount is limited to 1 ≤ const ≤ 32.
512-bit SVE
For each signed 64-bit integer set the odd 32-bit elements of (2) to ( (1) + ( 1 << ( const − 1 ) ) >> const, with unsigned saturation to 0 (if (1) is negative) or 0xFFFFFFFF, preserving even elements. This is the same as a regular shift, but with result incremented if the most-significant bit that was shifted out was set. The shift amount is limited to 1 ≤ const ≤ 32.
Larger sizes
1024-bit SVE
For each signed 64-bit integer set the odd 32-bit elements of (2) to ( (1) + ( 1 << ( const − 1 ) ) >> const, with unsigned saturation to 0 (if (1) is negative) or 0xFFFFFFFF, preserving even elements. This is the same as a regular shift, but with result incremented if the most-significant bit that was shifted out was set. The shift amount is limited to 1 ≤ const ≤ 32.
2048-bit SVE
For each signed 64-bit integer set the odd 32-bit elements of (2) to ( (1) + ( 1 << ( const − 1 ) ) >> const, with unsigned saturation to 0 (if (1) is negative) or 0xFFFFFFFF, preserving even elements. This is the same as a regular shift, but with result incremented if the most-significant bit that was shifted out was set. The shift amount is limited to 1 ≤ const ≤ 32.
Report mistakes or give feedback
Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.