From: Richard Henderson <rth@cygnus.com>
To: Mike Stump <mrs@wrs.com>
Cc: kenner@vlsi1.ultra.nyu.edu, egcs@cygnus.com
Subject: Re: improved i960 builtin setjmp/longjmp handling
Date: Thu, 23 Apr 1998 23:53:00 -0000 [thread overview]
Message-ID: <19980423235331.31279@dot.cygnus.com> (raw)
In-Reply-To: <199804232233.PAA24114@kankakee.wrs.com>
> ! #if defined (HAVE_nonlocal_goto) && defined (NEED_HARD_FRAME_FOR_NONLOCAL_GOTO)
> ! if (HAVE_nonlocal_goto && NEED_HARD_FRAME_FOR_NONLOCAL_GOTO)
> ! /* We store the frame pointer and the address of lab1 in the buffer
> ! and use the rest of it for the stack save area, which is
> ! machine-dependent. */
> ! emit_move_insn (gen_rtx_MEM (Pmode, buf_addr),
> ! hard_frame_pointer_rtx);
> ! else
> ! #endif
> ! /* We store the frame pointer and the address of lab1 in the buffer
> ! and use the rest of it for the stack save area, which is
> ! machine-dependent. */
> ! emit_move_insn (gen_rtx_MEM (Pmode, buf_addr),
> ! virtual_stack_vars_rtx);
> !
I would suggest one of two alternate courses:
(1) Define builtin_setjmp_setup to store the hard frame pointer, either
on top of the v_s_v_rtx, or in unused slots 4 or 5.
(2) Define a macro that is an expression that evaluates to an rtx to
use, and default that macro to v_s_v_rtx. The i960 header can then
define it to h_f_p_rtx directly.
r~
prev parent reply other threads:[~1998-04-23 23:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-04-23 18:49 Mike Stump
1998-04-23 23:53 ` Richard Henderson [this message]
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