On Sat, 6 Aug 2005 21:04:16 -0400 Mike Frysinger <[EMAIL PROTECTED]> babbled:
> On Friday 05 August 2005 05:59 pm, Mike Frysinger wrote: > > find attached a PoC patch ive been toying with lately for asm_blend.S which > > fixes each memory reference so that it is PIC aware. i can understand if > > some people could care less if their library has textrel's in them and > > would rather sacrifice a bit of slowdown at load time rather than slowdown > > at runtime > > i reviewed the stuff with some other Gentoo devs (Ned Ludd and Kevin F. Quinn) > > and the PaX team and we've come up with a much nicer patch which shouldnt > really shouldnt add significant overhead to the mmx routines :) > > the trick here is to go from doing: > .data > mVX000000: .byte 0, 0, 0, 0, 0, 0, 255, 127 > m00XXXXXX: .byte 255, 255, 255, 255, 255, 255, 0, 0 > .text > movq mVX000000, %mm5 > movq m00XXXXXX, %mm6 > > to this: > .text > pushl $0x7FFF0000 > pushl $0x00000000 > movq (%esp), %mm5 > pushl $0x0000FFFF > pushl $0xFFFFFFFF > movq (%esp), %mm6 > addl $16, %esp > > of course, these pretty little details are macro-ed out so in the source files > > you simply do: > LOAD_IMMQ(mVX000000, %mm5) > LOAD_IMMQ(m00XXXXXX, %mm6) > CLEANUP_IMMQ_LOADS(2) aaah that is much better. and i see it's now in cvs. yes. very much better. :) -- ------------- Codito, ergo sum - "I code, therefore I am" -------------- The Rasterman (Carsten Haitzler) [EMAIL PROTECTED] 裸好多 [EMAIL PROTECTED] Tokyo, Japan (東京 日本) ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
