From: Richard Biener <richard.guenther@gmail.com>
To: Aldy Hernandez <aldyh@redhat.com>
Cc: GCC patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] Add debug functions for REAL_VALUE_TYPE.
Date: Fri, 23 Sep 2022 08:54:23 +0200 [thread overview]
Message-ID: <CAFiYyc0RUb60DqOK+bwgCn5a4EMuFDC=Koy2Z=7cjH8wFSR8XQ@mail.gmail.com> (raw)
In-Reply-To: <20220922164752.2566043-1-aldyh@redhat.com>
On Thu, Sep 22, 2022 at 6:48 PM Aldy Hernandez via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> We currently have no way of dumping REAL_VALUE_TYPEs when debugging.
>
> Tested on a gdb session examining the real value 10.0:
>
> (gdb) p min
> $9 = {cl = 1, decimal = 0, sign = 0, signalling = 0, canonical = 0, uexp = 4, sig = {0, 0, 11529215046068469760}}
> (gdb) p debug (min)
> 0x0.ap+4
>
> OK for trunk?
I'd say the reference taking variant is enough (just remember to do
debug (*val)),
but OK (maybe simplify the pointer variant by forwarding instead of duplicating)
Richard.
>
> gcc/ChangeLog:
>
> * real.cc (debug): New.
> ---
> gcc/real.cc | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/gcc/real.cc b/gcc/real.cc
> index 73bbac645d9..a31b256a47b 100644
> --- a/gcc/real.cc
> +++ b/gcc/real.cc
> @@ -1900,6 +1900,22 @@ real_to_decimal (char *str, const REAL_VALUE_TYPE *r_orig, size_t buf_size,
> digits, crop_trailing_zeros, VOIDmode);
> }
>
> +DEBUG_FUNCTION void
> +debug (const REAL_VALUE_TYPE *r)
> +{
> + char s[60];
> + real_to_hexadecimal (s, r, sizeof (s), 0, 1);
> + fprintf (stderr, "%s\n", s);
> +}
> +
> +DEBUG_FUNCTION void
> +debug (const REAL_VALUE_TYPE &r)
> +{
> + char s[60];
> + real_to_hexadecimal (s, &r, sizeof (s), 0, 1);
> + fprintf (stderr, "%s\n", s);
> +}
> +
> /* Render R as a hexadecimal floating point constant. Emit DIGITS
> significant digits in the result, bounded by BUF_SIZE. If DIGITS is 0,
> choose the maximum for the representation. If CROP_TRAILING_ZEROS,
> --
> 2.37.1
>
next prev parent reply other threads:[~2022-09-23 6:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 16:47 Aldy Hernandez
2022-09-23 6:54 ` Richard Biener [this message]
2022-09-23 7:01 ` Aldy Hernandez
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