SVE Instruction List by Dougall Johnson
SQDMLALT (indexed): Signed saturating doubling multiply-add long to accumulator (top, indexed)
SQDMLALT Zda.D, Zn.S, Zm.S[imm] (SVE2 (SME
svint64_t svqdmlalt_lane[_s64](svint64_t op1, svint32_t op2, svint32_t op3, uint64_t imm_index)
128-bit SVE
For each odd signed 32-bit integer set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), 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 odd signed 32-bit integer set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), 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 odd signed 32-bit integer set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), 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 odd signed 32-bit integer set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), 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 odd signed 32-bit integer set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), 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.