SVE Instruction List by Dougall Johnson
See "SQDMULLB (vectors)" in the exploration tools

SQDMULLB (vectors): Signed saturating doubling multiply long (bottom)

SQDMULLB Zd.S, Zn.H, Zm.H (SVE2 (SME
svint32_t svqdmullb[_s32](svint16_t op1, svint16_t op2)

128-bit SVE

For each even signed 16-bit integer set the double-width (3) to (1) * (2) << 1, with signed saturation to 0x7FFFFFFF.

256-bit SVE

For each even signed 16-bit integer set the double-width (3) to (1) * (2) << 1, with signed saturation to 0x7FFFFFFF.

512-bit SVE

For each even signed 16-bit integer set the double-width (3) to (1) * (2) << 1, with signed saturation to 0x7FFFFFFF.
Larger sizes

1024-bit SVE

For each even signed 16-bit integer set the double-width (3) to (1) * (2) << 1, with signed saturation to 0x7FFFFFFF.

2048-bit SVE

For each even signed 16-bit integer set the double-width (3) to (1) * (2) << 1, with signed saturation to 0x7FFFFFFF.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.