The ECX guide is vague and lacks more examples but some PPC ASM constructs are unsupported. The compiler will attempt to throw an error but will send a corrupt pointer to output and crash. Depending on the severity it can recover after the crash and will write corrupt code to binary.
Consider the following construct:
LZW Rx, .member(object:Rx)
This will crash:
DEF object:PTR TO object, base:REG PTR TO object
LZW R13, .member(object)
LZW R13, .member(object:object)
LZW R13, .member(base:object)
LZW R13, member(base)
As you can see, technically it should accept base as base is a register, but it doesn't work and crashes. On top of this it's also rather complicated. In most cases, internally it will need to load the base in and the load a member off the base. But if the base is already a register all it needs to do is to load member offset from base. I also tested using OFFSETOF to calculate a member offset from base but it gives another error about that even after setting it in a CONST value.
The problem code is in ppcgen.e in the doAsm() proc at the section examining "." member case.
The ECX guide is vague and lacks more examples but some PPC ASM constructs are unsupported. The compiler will attempt to throw an error but will send a corrupt pointer to output and crash. Depending on the severity it can recover after the crash and will write corrupt code to binary.
Consider the following construct:
LZW Rx, .member(object:Rx)This will crash:
As you can see, technically it should accept base as base is a register, but it doesn't work and crashes. On top of this it's also rather complicated. In most cases, internally it will need to load the base in and the load a member off the base. But if the base is already a register all it needs to do is to load member offset from base. I also tested using OFFSETOF to calculate a member offset from base but it gives another error about that even after setting it in a CONST value.
The problem code is in ppcgen.e in the doAsm() proc at the section examining "." member case.