Re: [Qemu-devel] [PULL 5/7] tcg: Add mmu helpers that take a return address argument

[Peter Maydell]

On 26 August 2013 22:00, Richard Henderson <address@hidden> wrote:
> Allow the code that tcg generates to be less obtuse, passing in
> the return address directly instead of computing it in the helper.

> +uint8_t helper_ret_ldb_mmu(CPUArchState *env, target_ulong addr,
> +                           int mmu_idx, uintptr_t retaddr);

>  uint8_t helper_ldb_mmu(CPUArchState *env, target_ulong addr, int mmu_idx);

I thought the reason we did it this way round was to avoid having
so many arguments to helpers that we overflowed registers and
into the stack on some calling conventions? Or does this not make
much difference in practice?

thanks
-- PMM