Hello, I try to make estimation of time and efforts to implement support of one CPU in gcc 4.x.
The main problem, as can I see, that CPU can only access memory using 32bit word as unit. I try to play with ggx: http://spindazzle.org/ggx/ and force it to work with memory like above mentioined CPU: #define UNITS_PER_WORD 1 #define BITS_PER_UNIT 32 #define BITS_PER_WORD 32 #define POINTER_SIZE 32 but this cause a segfault in builtin_define_float_constants. The old implementation for this CPU based on 3.3.x branch uses trick like this: #define QImode SImode but now it does not work. I define Pmode to QImode but this also not helps, it still catch segfault. Can anybody with deep knowledge in gcc, describe a little, the main steps to force compiler generate code for UINTS_PER_WORD==1 target?
