From: Richard Henderson <rth@twiddle.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] TCGv_i64 type?
Date: Sun, 13 Dec 2009 18:27:44 -0800 [thread overview]
Message-ID: <4B25A2A0.4060007@twiddle.net> (raw)
In-Reply-To: <fdaac4d50912131800i2be62122h9c46967159a599d8@mail.gmail.com>
On 12/13/2009 06:00 PM, Jun Koi wrote:
> I found that in tcg/tcg.h, we have following definitions:
>
> typedef int TCGv_i32;
> typedef int TCGv_i64;
>
> Is that correct? Why do we have the same definition for 64bit and 32
> bit types? Doesnt TCGv_i64 suppose to be 64 bit?
Look higher up in the DEBUG_TCGV section and you'll find
typedef struct
{
int i32;
} TCGv_i32;
typedef struct
{
int i64;
} TCGv_i64;
which are separate types for type checking purposes.
Both are "int" because at the TCG level these are register numbers.
They are separate types because they indicate 32-bit or 64-bit
quantities in the compiled code.
r~
prev parent reply other threads:[~2009-12-14 2:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-14 2:00 [Qemu-devel] TCGv_i64 type? Jun Koi
2009-12-14 2:27 ` Richard Henderson [this message]
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