See "SQDMLALBT" in the exploration tools

SQDMLALBT: Signed saturating doubling multiply-add long to accumulator (bottom × top)

SQDMLALBT Zda.H, Zn.B, Zm.B (SVE2 (SME

svint16_t svqdmlalbt[_s16](svint16_t op1, svint8_t op2, svint8_t op3)

128-bit SVE

For each odd signed 8-bit integer from (1) and even signed 8-bit integer from (2) set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), with signed saturation to 0x7FFF or −0x8000.

256-bit SVE

For each odd signed 8-bit integer from (1) and even signed 8-bit integer from (2) set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), with signed saturation to 0x7FFF or −0x8000.

512-bit SVE

For each odd signed 8-bit integer from (1) and even signed 8-bit integer from (2) set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), with signed saturation to 0x7FFF or −0x8000.

Larger sizes

1024-bit SVE

For each odd signed 8-bit integer from (1) and even signed 8-bit integer from (2) set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), with signed saturation to 0x7FFF or −0x8000.

2048-bit SVE

For each odd signed 8-bit integer from (1) and even signed 8-bit integer from (2) set the double-width (4) to sat( (3) + sat( (1) * (2) << 1 ) ), with signed saturation to 0x7FFF or −0x8000.

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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.