From: "Clarke, Stephen" <stephen.clarke@superh.com>
To: "Elena Zannoni" <ezannoni@redhat.com>
Cc: <gdb@sources.redhat.com>
Subject: RE: sh4 abi doc
Date: Thu, 26 Sep 2002 11:47:00 -0000 [thread overview]
Message-ID: <287E4644B5249D449C56FA5409A874AE03EFBB@sh-us-ex01.us.w2k.superh.com> (raw)
> From: Elena Zannoni [mailto:ezannoni@redhat.com]
> Sent: Thursday, September 26, 2002 10:43 AM
>
> The cutoff is 8 bytes.
Yes: anything bigger than 8 bytes is definitely
returned in memory.
But the cutoff is not "clean", because structs smaller
than this could also be returned in memory, if they
don't pass the "same size and alignment as an integer
type" rule.
For example, in
struct s { char c[3]; } wibble;
struct s foo(void) { return wibble; }
the return value from foo() will be in memory, not
in R0, because there is no 3-byte integer type.
Sorry if that was obvious already, I just wanted to
be sure.
Steve.
next reply other threads:[~2002-09-26 18:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-26 11:47 Clarke, Stephen [this message]
2002-09-26 12:45 ` Elena Zannoni
2002-09-26 12:54 ` Andrew Cagney
-- strict thread matches above, loose matches on Subject: below --
2002-09-26 10:33 Clarke, Stephen
2002-09-26 10:10 Clarke, Stephen
2002-09-26 10:18 ` Andrew Cagney
2002-09-26 10:46 ` Elena Zannoni
2002-09-26 9:17 Clarke, Stephen
2002-09-26 9:54 ` Elena Zannoni
2002-09-26 8:21 Elena Zannoni
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