From: Richard Henderson <rth@cygnus.com>
To: "Joseph S. Myers" <jsm28@cam.ac.uk>
Cc: gcc@gcc.gnu.org, libc-alpha@sourceware.cygnus.com
Subject: Re: Implementation of <tgmath.h>
Date: Mon, 31 Jul 2000 11:14:00 -0000 [thread overview]
Message-ID: <20000731111450.A6913@cygnus.com> (raw)
In-Reply-To: <Pine.SOL.4.21.0007282023140.4217-100000@red.csi.cam.ac.uk>
On Fri, Jul 28, 2000 at 08:47:26PM +0100, Joseph S. Myers wrote:
> The best suggestion I have for a compiler extension to allow a correct
> implementation would be a series of builtin functions corresponding to
> the glibc macros, so that for example
>
> #define expm1(Val) __builtin_tgmath_unary_real_only(Val, expm1f, expm1, \
> expm1l)
>
> would have the compiler create a call to the appropriate one of expm1f,
> expm1, expm1l according to the type of Val and the rules of <tgmath.h>
> when it sees a call to __builtin_tgmath_unary_real_only.
Ug. This would seem to need the addition of mini-templates to
the C front end.
OTOH, the IA-64 abi has some builtin functions that could benefit
from this. At present we implement two separate builtins and
play header file tricks to try and make it come out right.
r~
next prev parent reply other threads:[~2000-07-31 11:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-28 12:47 Joseph S. Myers
2000-07-28 12:54 ` Mark Mitchell
2000-07-28 13:43 ` Geoff Keating
2000-07-28 13:55 ` Ulrich Drepper
2000-07-28 15:12 ` Joern Rennecke
2000-07-28 15:36 ` Joseph S. Myers
2000-07-28 19:04 ` Joseph S. Myers
2000-07-31 11:14 ` Richard Henderson [this message]
2000-07-31 12:45 ` Declaration clashing Matt Minnis
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