On Thu, Oct 4, 2012 at 10:53 AM, Tom Stellard <t...@stellard.net> wrote: > On Thu, Oct 04, 2012 at 10:42:45PM +0800, Liu Xin wrote: >> Hi, Tom, >> >> thank you for your instant response. we decide to try clover for r600. it >> should work on ubuntu(11.10), right? >> have you refined tgsi compiler for r600? >> > > Build instructions for clover + r600g are here: > http://dri.freedesktop.org/wiki/GalliumCompute#How_to_Install > these should work on most any distro. > > We are in the process of transitioning from LLVM 3.2 to LLVM 3.1, so > these instructions may change in the near future.
3.1 to 3.2 ;) > > There are no plans to update the r600g tgsi compiler to handle TGSI > compute instructions. LLVM IR is the preferred IR for compute programs, > and it is well supported. > > -Tom > > >> thanks, >> --lx >> >> >> >> >> >> On Thu, Oct 4, 2012 at 9:42 PM, Tom Stellard <t...@stellard.net> wrote: >> >> > On Wed, Oct 03, 2012 at 08:15:07PM +0800, Liu Xin wrote: >> > > Hi, Gallium Hackers, >> > > >> > > We are working on Gallium3D on android-x86, APU. We want to run general >> > > compute programs on r600 GPU, specifically, "Radeon HD6310(Evergreen >> > > family)". >> > > >> > > The first thing drawn our eyes are gallium/tests/trivial/compute.c >> > because >> > > it calls general compute APIs and attempts to execute tgsi programs on a >> > > back-end. unfortunately, we failed to execute it even we have >> > pipe_r600.so >> > > on android-x86. now we have a healthy android-x86 and it supports opengl >> > > well. further, we can run tri.c under tests/trivial/ directory as well. >> > > >> > >> > The gallium/tests/trivial/compute.c program won't work on r600g, because >> > the driver only supports compute programs written in LLVM IR and not >> > TGSI. >> > >> > There are some example OpenCL programs here: >> > http://cgit.freedesktop.org/~tstellar/opencl-example/ >> > that work with r600g. Make sure you build Mesa with the --enable-opencl >> > configure flag. >> > >> > If you don't want to use OpenCL and just want to play with the Gallium >> > compute interface, you can replace the TGSI program with LLVM IR. >> > You can use the LLVM C API builder interface to create a program (see: >> > http://llvm.org/docs/doxygen/html/Core_8h.html) or you can write the >> > LLVM IR by hand and then parse it into LLVM bitcode (I think there are C >> > API functions that will do this too). >> > >> > >> > Hope this helps. >> > >> > -Tom >> > > let's take a simple example. can a kind person give us pointers? >> > > static void test_resource_access(struct context *ctx) >> > > { >> > > const char *src = "COMP\n" >> > > "DCL RES[0], BUFFER, RAW, WR\n" >> > > "DCL RES[1], 2D, RAW, WR\n" >> > > "DCL SV[0], BLOCK_ID[0]\n" >> > > "DCL TEMP[0], LOCAL\n" >> > > "DCL TEMP[1], LOCAL\n" >> > > "IMM UINT32 { 15, 0, 0, 0 }\n" >> > > "IMM UINT32 { 16, 1, 0, 0 }\n" >> > > "\n" >> > > " BGNSUB\n" >> > > " UADD TEMP[0].x, SV[0].xxxx, SV[0].yyyy\n" >> > > " AND TEMP[0].x, TEMP[0], IMM[0]\n" >> > > " UMUL TEMP[0].x, TEMP[0], IMM[1]\n" >> > > " LOAD TEMP[0].xyzw, RES[0], TEMP[0]\n" >> > > " UMUL TEMP[1], SV[0], IMM[1]\n" >> > > " STORE RES[1].xyzw, TEMP[1], TEMP[0]\n" >> > > " RET\n" >> > > " ENDSUB\n"; >> > > void init0(void *p, int s, int x, int y) { >> > > *(float *)p = 8.0 - (float)x; >> > > } >> > > void init1(void *p, int s, int x, int y) { >> > > *(uint32_t *)p = 0xdeadbeef; >> > > } >> > > void expect(void *p, int s, int x, int y) { >> > > *(float *)p = 8.0 - (float)((x + 4*y) & 0x3f); >> > > } >> > > >> > > printf("- %s\n", __func__); >> > > >> > > init_prog(ctx, 0, 0, 0, src, NULL); >> > > init_tex(ctx, 0, PIPE_BUFFER, true, PIPE_FORMAT_R32_FLOAT, >> > > 256, 0, init0); >> > > init_tex(ctx, 1, PIPE_TEXTURE_2D, true, PIPE_FORMAT_R32_FLOAT, >> > > 60, 12, init1); >> > > init_compute_resources(ctx, (int []) { 0, 1, -1 }); >> > > launch_grid(ctx, (uint []){1, 1, 1}, (uint []){15, 12, 1}, 0, >> > NULL); >> > > check_tex(ctx, 1, expect, NULL); >> > > destroy_compute_resources(ctx); >> > > destroy_tex(ctx); >> > > destroy_prog(ctx); >> > > } >> > > >> > > for init_prog, here is the key functions: >> > > *tgsi_text_translate(psrc, prog, Elements(prog)); >> > > what's the meaning for this API? the input is tgsi program, what's the >> > > output? >> > > in a nutshell, how can gallium translate tgsi to evergreen's ISA. >> > > >> > > *ctx->hwcs = pipe->create_compute_state(pipe, &cs); >> > > *pipe->bind_compute_state(pipe, ctx->hwcs); >> > > in evergreen_compute.c, it doesn't calloc kernels array and process >> > > cso->prog if HAVE_OPENCL is not set. should we set HAVE_OPENCL for >> > general >> > > compute? >> > > >> > > thanks, >> > > --lx >> > >> > > _______________________________________________ >> > > mesa-dev mailing list >> > > mesa-dev@lists.freedesktop.org >> > > http://lists.freedesktop.org/mailman/listinfo/mesa-dev >> > >> > > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
