Hi Maciej, Philippe, > So results of individual operations are as in the comments with this > code: > > mthi $0 # HI <- 0 > mtlo $0 # LO <- 0 > addiu $2, $0, 1 # $2 <- 1 > lui $3, 0x4000 # $3 <- 0x40000000 > maddu $4, $3, $2 # HI <- 0 > # LO <- 0x40000000 > # $4 <- 0x40000000 > maddu $5, $4, $2 # HI <- 0 > # LO <- 0xffffffff80000000 > # $5 <- 0xffffffff80000000 > maddu $6, $4, $2 # HI <- 1 > # LO <- 0 > # $6 <- 0
Adding tests such as the one above to for example tests/tcg/mips/txx9/ would be useful, I think. As previously noted, GCC can produce 32-bit R5900 programs but 64-bit compilations fail, so full test coverage may not be easily obtainable at the moment. Fredrik
