On Wed, Feb 15, 2012 at 9:20 PM, Jeremy Huddleston <[email protected]> wrote: > Can you give me a bit more specifics? Do you have a reduced test case that > you can show me of the problems you are having? Have you opened a bug report > on llvm's bugzilla? Have you filed a radar with Apple's bug tracker? > > On Feb 15, 2012, at 3:13 PM, cu <[email protected]> wrote: > >> - The assembler code is not mine. It's a standard assembler set of >> optimized instructions for NEON (arm v7 etc) that is included with pixman >> >> - It will not build on iOS because configure script is unable to test >> NEON intrinsics (as they are not supported by iOS asm compiler) >> >> - So far, the only (somewhat) workable approach was to compile the >> assembler code on Linux, then disassemble into basic instruction set >> (i.e. not using any macros etc), and then use that "raw assembler" to >> compile for iOS. Doing so still requires somehow working around >> configure script (i.e. editing it to forcibly enable ARM NEON >> optimizations). It's a manual process and clearly not particularly >> convenient, or maintainable. >> >> >> >> Jeremy Huddleston wrote: >>> I haven't tested anything or even looked at your assembly. I just fixed it >>> such that it would build out of the box. That's not to say that it builds >>> *correct* out of the box, but now it at least builds trivially, and you can >>> look into any other issues. >>> >>> What errors are you getting trying to compile the pixman arm assembly code >>> for iOS? >>> >>> On Feb 15, 2012, at 6:34 AM, cu <[email protected]> wrote: >>> >>> >>>> I think the difficulty refers to the fact that pixman arm assembly code >>>> can't be directly compiled for iOS. >>>> >>>> Does this patch still require the precompiled-disassembled version of >>>> pixman_arm_neon.S? >>>> >>>> >>>> Jeremy Huddleston wrote: >>>> >>>>> I noticed this message in the release notes for 0.24.4: >>>>> """ >>>>> This release also contains some basic support for using the NEON >>>>> acceleration on iOS, although actually building pixman on that platform >>>>> remains difficult. >>>>> """ >>>>> >>>>> I was curious about what was so difficult about building pixman for iOS >>>>> and decided to lend a hand. Attached are 2 patches for review and build >>>>> instructions for how I got it to build. >>>>> >>>>> The script will build pixman master for iOS (after the 2 patches are >>>>> applied). The patches fix TLS detection and add support for >>>>> --disable-libpng (because I didn't feel like building libpng, too, and >>>>> pkg-config picked up my host libpng). >>>>> >>>>> Everything built just fine. I haven't tested it, but this should make it >>>>> easier for people to use in iOS if they want. You'll need to adjust the >>>>> path to the SDK and the minimum version of iOS that you want to support >>>>> as appropriate. >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------ >>>>> >>>>> >>>>> >>>>> SDK="/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk" >>>>> export CC=$(xcrun -sdk iphoneos -find clang) >>>>> export AS=$(xcrun -sdk iphoneos -find as) >>>>> export CPPFLAGS="-isysroot ${SDK}" >>>>> export CFLAGS="-g3 -gdwarf-2 -Os -pipe -miphoneos-version-min=5.0 -arch >>>>> armv6 -arch armv7" >>>>> export LDFLAGS="-isysroot ${SDK} -miphoneos-version-min=5.0 -arch armv6 >>>>> -arch armv7" >>>>> ./configure --host=arm-apple-darwin >>>>> make >>>>> >>>>> --Jeremy
CC'ing Bobby Salazar, who has worked on this. _______________________________________________ Pixman mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/pixman
