power4 compiling
Alan Modra
amodra at bigpond.net.au
Tue Nov 4 11:23:44 EST 2003
On Mon, Nov 03, 2003 at 10:09:30AM -0600, Hollis Blanchard wrote:
> You shouldn't need to comment out tlbiel. Instead do this:
> CFLAGS = -mtune=power4 -Wa,-mcpu=power4
> That will tell the compiler not to use POWER4-specific instructions,
> but also tell the assembler it's ok when we use inline asm statements.
No, this is dangerous. -mcpu=power4 tells the assembler to use the
power4 form of mtcrf if it so happens that only one field of cr is
being set. gcc may generate such mtcrf instruction.
--
Alan Modra
IBM OzLabs - Linux Technology Centre
** Sent via the linuxppc64-dev mail list. See http://lists.linuxppc.org/
More information about the Linuxppc64-dev
mailing list