On Sun, 4 Nov 2018, Fredrik Noring wrote: > It appears the correct function is tcg_gen_mov_tl because the TX79 manual > says > > MFHI: GPR[rd]63..0 <- HI63..0 > MFLO: GPR[rd]63..0 <- LO63..0 > MTHI: HI63..0 <- GPR[rs]63..0 > MTLO: LO63..0 <- GPR[rs]63..0 > MFHI1: GPR[rd]63..0 <- HI127..64 > MFLO1: GPR[rd]63..0 <- LO127..64 > MTHI1: HI127..64 <- GPR[rs]63..0 > MTLO1: LO127..64 <- GPR[rs]63..0 > > so the GPR is copied to/from in full in all cases. This is slightly > different to how acc = 1 is handled in gen_HILO.
However `gen_HILO' looks wrong to me as it'll truncate the values of $acc3-$acc1 with the 64-bit DSP ASE. Maciej
