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?
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 > >
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