On 18 Dec 2006 at 11:28, Shaun Jackman wrote:
On 11/26/06, Denis Vlasenko [EMAIL PROTECTED] wrote:
On Saturday 18 November 2006 00:30, Shaun Jackman wrote:
The following macro expands to some rather frightful code on the AVR:
#define BSWAP_16(x) \
x) 8) 0xff) | (((x)
On 12/18/06, Anton Erasmus [EMAIL PROTECTED] wrote:
Hi,
Not a macro, but the following seems to generate reasonable code.
...
Thanks Anton,
I came to the same conclusion.
Cheers,
Shaun
static inline uint16_t bswap_16_inline(uint16_t x)
{
union {
uint16_t x;
On 12/18/06, David VanHorn [EMAIL PROTECTED] wrote:
Am I missing something here?
Why not pop to assembler, push the high, push the low, pop the high, pop the
low?
* Inline assembler cannot be used at compile time, for example to
initialize a static variable.
* If the swap function is called
Hi,
and it is possible to use an anonymous struct:
static inline uint16_t bswap_16_inline(uint16_t x)
{
union {
uint16_t x;
struct {
uint8_t a, b;
};
} in, out;
in.x = x;
out.a = in.b;
out.b = in.a;
return out.x;
}
Regards,
Nils
On 12/18/06, Nils Springob [EMAIL PROTECTED] wrote:
Hi,
and it is possible to use an anonymous struct:
True. However, unnamed struct/union fields are an extension of the C
language provided by GCC and not strictly portable. It is a nice
feature though. It would be nice if it crept its way
On 11/19/06, Eric Weddington [EMAIL PROTECTED] wrote:
Use gcc head, __builtin_bswap and make sure the AVR backend
implements the
bswap rtl patterns.
There's the problem. You can't just glibly say make sure the AVR backend
implements the bswap rtl patterns. There are precious few volunteers
-Original Message-
From: Steven Bosscher [mailto:[EMAIL PROTECTED]
Sent: Sunday, November 19, 2006 3:55 AM
To: Eric Weddington
Cc: Paul Brook; gcc@gcc.gnu.org; Shaun Jackman;
avr-gcc-list@nongnu.org
Subject: Re: [avr-gcc-list] Re: AVR byte swap optimization
On 11/19/06, Eric
On Sun, Nov 19, 2006 at 08:31:22AM -0700, Eric Weddington wrote:
Rask, do you have FSF paperwork in place?
Yes, it was completed recently.
--
Rask Ingemann Lambertsen
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
org] On Behalf Of Paul Brook
Sent: Saturday, November 18, 2006 9:46 AM
To: gcc@gcc.gnu.org; Shaun Jackman
Cc: avr-gcc-list@nongnu.org
Subject: [avr-gcc-list] Re: AVR byte swap optimization
Ideally
