SVE Instruction List by Dougall Johnson
FMLALLBT (indexed): 8-bit floating-point multiply-add by indexed element to single-precision (bottom top)
FMLALLBT Zda.S, Zn.B, Zm.B[imm] (SVE2+FP8FMA+NS (SSVE-FP8FMA
128-bit SVE
For each 32-bit float element of (4), multiply the 8-bit float at byte position 1 of the corresponding 4-byte group in (2) with the 8-bit float from (1), and add the product to the 32-bit float accumulator (3). Within each 128-bit segment, the value used from (1) is specified by imm. The FP8 format for each 8-bit source operand is selected independently by FPMR.
256-bit SVE
For each 32-bit float element of (4), multiply the 8-bit float at byte position 1 of the corresponding 4-byte group in (2) with the 8-bit float from (1), and add the product to the 32-bit float accumulator (3). Within each 128-bit segment, the value used from (1) is specified by imm. The FP8 format for each 8-bit source operand is selected independently by FPMR.
512-bit SVE
For each 32-bit float element of (4), multiply the 8-bit float at byte position 1 of the corresponding 4-byte group in (2) with the 8-bit float from (1), and add the product to the 32-bit float accumulator (3). Within each 128-bit segment, the value used from (1) is specified by imm. The FP8 format for each 8-bit source operand is selected independently by FPMR.
Larger sizes
1024-bit SVE
For each 32-bit float element of (4), multiply the 8-bit float at byte position 1 of the corresponding 4-byte group in (2) with the 8-bit float from (1), and add the product to the 32-bit float accumulator (3). Within each 128-bit segment, the value used from (1) is specified by imm. The FP8 format for each 8-bit source operand is selected independently by FPMR.
2048-bit SVE
For each 32-bit float element of (4), multiply the 8-bit float at byte position 1 of the corresponding 4-byte group in (2) with the 8-bit float from (1), and add the product to the 32-bit float accumulator (3). Within each 128-bit segment, the value used from (1) is specified by imm. The FP8 format for each 8-bit source operand is selected independently by FPMR.
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Inspired by and based on the x86/x64 SIMD Instruction List by Daytime.