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.
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
