[PATCH] Optimize MIPS memcpy

[Steve Ellcey]

On Tue, 2012-09-11 at 16:34 +1200, Maxim Kuvyrkov wrote:
 
> > 2012-09-06  Steve Ellcey  <sellcey@mips.com>
> > 
> > 	* sysdeps/mips/memcpy.S: Add prefetching and more unrolling, make
> > 	it work in 32 or 64 bit modes.
> > 	* sysdeps/mips/mips64/memcpy.S: Remove.
> 
> This fails to build for me at least for N32 ABI.
> 
> ../ports/sysdeps/mips/memcpy.S: Assembler messages:
> ../ports/sysdeps/mips/memcpy.S:272: Error: Illegal operands `lw t4,((4)*4)($5)'
> ../ports/sysdeps/mips/memcpy.S:273: Error: Illegal operands `lw t5,((5)*4)($5)'
> 
> I guess the extra parenthesis screw up assembler syntax.
> 
> --
> Maxim Kuvyrkov
> CodeSourcery / Mentor Graphics

It is not the parenthesis, it is the use of t4, t5, t6, and t7 instead
of ta0, ta1, ta2, and ta3.  I use the t[4567] for 32 bit mode but I
guess I want to use ta[0123] for N32 ABI mode as well as for the 64 bit
mode.  Here is a new version with this change and with a fixed copyright
notice.

Steve Ellcey
sellcey@mips.com

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