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pan/midgard: Implement some compute builtins

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We implement gl_WorkGroupID and gl_LocalInvocationID, which map to
ld_compute_id with special sources.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-08-06 13:47:17 -07:00
parent 2b4e579585
commit 7229af794b
1 changed files with 28 additions and 0 deletions
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28
src/panfrost/midgard/midgard_compile.c
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@ -189,6 +189,7 @@ M_LOAD(ld_color_buffer_8);
//M_STORE(st_vary_16);
M_STORE(st_vary_32);
M_LOAD(st_cubemap_coords);
M_LOAD(ld_compute_id);
static midgard_instruction
v_alu_br_compact_cond(midgard_jmp_writeout_op op, unsigned tag, signed offset, unsigned cond)
@ -1326,6 +1327,28 @@ emit_sysval_read(compiler_context *ctx, nir_instr *instr, signed dest_override,
ins->mask = mask_of(nr_components);
}
static unsigned
compute_builtin_arg(nir_op op)
{
switch (op) {
case nir_intrinsic_load_work_group_id:
return 0x14;
case nir_intrinsic_load_local_invocation_id:
return 0x10;
default:
unreachable("Invalid compute paramater loaded");
}
}
static void
emit_compute_builtin(compiler_context *ctx, nir_intrinsic_instr *instr)
{
unsigned reg = nir_dest_index(ctx, &instr->dest);
midgard_instruction ins = m_ld_compute_id(reg, 0);
ins.mask = mask_of(3);
ins.load_store.arg_1 = compute_builtin_arg(instr->intrinsic);
emit_mir_instruction(ctx, ins);
}
static void
emit_intrinsic(compiler_context *ctx, nir_intrinsic_instr *instr)
{
@ -1555,6 +1578,11 @@ emit_intrinsic(compiler_context *ctx, nir_intrinsic_instr *instr)
emit_sysval_read(ctx, &instr->instr, -1, 3);
break;
case nir_intrinsic_load_work_group_id:
case nir_intrinsic_load_local_invocation_id:
emit_compute_builtin(ctx, instr);
break;
default:
printf ("Unhandled intrinsic\n");
assert(0);