From: SASADA Koichi <ko1@...>
Date: 2010-08-25T03:23:06+09:00
Subject: [ruby-dev:42130] Re: [Feature:trunk] argument delegation

　ささだです．

　あまりに暑くて目が覚めました．

(2010/08/25 0:30), Yusuke ENDOH wrote:
> --- a/vm_core.h
> +++ b/vm_core.h
> @@ -544,6 +544,7 @@ typedef struct {
>  #define VM_CALL_TAILRECURSION_BIT  (0x01 << 6)
>  #define VM_CALL_SUPER_BIT          (0x01 << 7)
>  #define VM_CALL_OPT_SEND_BIT       (0x01 << 8)
> +#define VM_CALL_ARGS_BLOCKTRGH_BIT (0x01 << 9)
> 
>  #define VM_SPECIAL_OBJECT_VMCORE       0x01
>  #define VM_SPECIAL_OBJECT_CBASE        0x02
> diff --git a/vm_insnhelper.c b/vm_insnhelper.c
> index 985a2fb..2a127d7 100644
> --- a/vm_insnhelper.c
> +++ b/vm_insnhelper.c
> @@ -261,6 +261,10 @@ caller_setup_args(const rb_thread_t *th,
> rb_control_frame_t *cfp, VALUE flag,
>  		*block = blockptr;
>  	    }
>  	}
> +	else if (flag & VM_CALL_ARGS_BLOCKTRGH_BIT) {
> +	    rb_control_frame_t *reg_cfp = cfp;
> +	    *block = GET_BLOCK_PTR();
> +	}
>  	else if (blockiseq) {
>  	    blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
>  	    blockptr->iseq = blockiseq;
> 

　できれば，VM_CALL_ARGS_BLOCKTRGH_BIT を増やすんじゃなく
て，VM_CALL_ARGS_BLOCKARG_BIT だけど，blockiseq　かなんかの値を特殊にし
ておくとか，そういう実装にしてもらえるといいんじゃないかと思います．

（命令オペランドのバリエーションが減った方が色々うれしい）

-- 
// SASADA Koichi at atdot dot net