SVE Instruction List by Dougall Johnson
SQRDMLSH (indexed): Signed saturating rounding doubling multiply-subtract high from accumulator (indexed)
SQRDMLSH Zda.D, Zn.D, Zm.D[imm] (SVE2 (SME
svint64_t svqrdmlsh_lane[_s64](svint64_t op1, svint64_t op2, svint64_t op3, uint64_t imm_index)
128-bit SVE
For each signed 64-bit integer set (4) to ( ( (3) << 63 ) − (1) * (2) + 0x4000000000000000 ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF or −0x8000000000000000. Within each 128-bit segment, the value used from (1) is specified by imm.
256-bit SVE
For each signed 64-bit integer set (4) to ( ( (3) << 63 ) − (1) * (2) + 0x4000000000000000 ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF or −0x8000000000000000. Within each 128-bit segment, the value used from (1) is specified by imm.
512-bit SVE
For each signed 64-bit integer set (4) to ( ( (3) << 63 ) − (1) * (2) + 0x4000000000000000 ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF or −0x8000000000000000. Within each 128-bit segment, the value used from (1) is specified by imm.
Larger sizes
1024-bit SVE
For each signed 64-bit integer set (4) to ( ( (3) << 63 ) − (1) * (2) + 0x4000000000000000 ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF or −0x8000000000000000. Within each 128-bit segment, the value used from (1) is specified by imm.
2048-bit SVE
For each signed 64-bit integer set (4) to ( ( (3) << 63 ) − (1) * (2) + 0x4000000000000000 ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF or −0x8000000000000000. Within each 128-bit segment, the value used from (1) is specified by imm.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.