search for: acc_a

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2018 Apr 10
1
How to finalize instruction lowering after register allocation.
...he FPU instruction format has a 2 bits operand indicating which units are involved: none, only UnitA, only UnitB, and the SIMD version UnitA and UnitB. The SIMD version of a FPU instruction operates on registers with the same ID of both banks. For examples: FADD A R1, R2; // => ACC_A = RegisterA_1 + RegisterA_1 FADD B R5, R6; // => ACC_B = RegisterB_5 + RegisterB_6 FADD AB R7, R8; // => ACC_A = RegisterA_7 + RegisterA_8 and ACC_B = RegisterB_7 + RegisterB_8 >From a machine registers definition point of view, I've first defined...