See "SQDMULH (indexed)" in the exploration tools

SQDMULH (indexed): Signed saturating doubling multiply high (indexed)

SQDMULH Zd.D, Zn.D, Zm.D[imm] (SVE2 (SME

svint64_t svqdmulh_lane[_s64](svint64_t op1, svint64_t op2, uint64_t imm_index)

128-bit SVE

For each signed 64-bit integer set (3) to ( (1) * (2) ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF. Within each 128-bit segment, the value used from (1) is specified by imm.

256-bit SVE

For each signed 64-bit integer set (3) to ( (1) * (2) ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF. Within each 128-bit segment, the value used from (1) is specified by imm.

512-bit SVE

For each signed 64-bit integer set (3) to ( (1) * (2) ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF. 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 (3) to ( (1) * (2) ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF. Within each 128-bit segment, the value used from (1) is specified by imm.

2048-bit SVE

For each signed 64-bit integer set (3) to ( (1) * (2) ) >> 63, with signed saturation to 0x7FFFFFFFFFFFFFFF. 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.