[nevcairiel]

If a register is being used has to be flagged by the ASM function in question (in its cglobal line), x86inc.asm cannot detect that automatically, the code has to tell it. If its not pushing regs that are in fact being used, then the cglobal line may be wrong. From the code it looks like the macro is being passed a "7" for numbers of register used, while RSI would be the 9th in their counting (ie. r8). I don't see it directly being used in quantize_b, but it maybe used behind a symbolic name to load a parameter.