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pan/bi: Implement fragment_out by builder

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Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8135>
This commit is contained in:
Alyssa Rosenzweig 2020-12-09 08:42:41 -05:00 • committed by Marge Bot
parent 3c5097bbfd
commit 49f38aa9e7
1 changed files with 63 additions and 0 deletions
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63
src/panfrost/bifrost/bifrost_compile.c
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@ -559,6 +559,69 @@ bi_emit_zs_emit(bi_context *ctx, unsigned z, unsigned stencil)
bi_emit(ctx, ins); bi_emit(ctx, ins);
} }
static void
bi_emit_fragment_out(bi_builder *b, nir_intrinsic_instr *instr)
{
bool combined = instr->intrinsic ==
nir_intrinsic_store_combined_output_pan;
unsigned writeout = combined ? nir_intrinsic_component(instr) :
PAN_WRITEOUT_C;
bool emit_blend = writeout & (PAN_WRITEOUT_C);
bool emit_zs = writeout & (PAN_WRITEOUT_Z | PAN_WRITEOUT_S);
const nir_variable *var =
nir_find_variable_with_driver_location(b->shader->nir,
nir_var_shader_out, nir_intrinsic_base(instr));
assert(var);
if (!b->shader->emitted_atest && !b->shader->is_blend) {
nir_alu_type T = nir_intrinsic_src_type(instr);
assert(T == nir_type_float16 || T == nir_type_float32);
bi_index rgba = bi_src_index(&instr->src[0]);
bi_index alpha = (T == nir_type_float32) ? bi_word(rgba, 3) :
bi_half(bi_word(rgba, 1), true) ;
bi_atest_to(b, bi_register(60), bi_register(60), alpha);
b->shader->emitted_atest = true;
}
if (emit_zs) {
bi_index z = { 0 }, s = { 0 };
if (writeout & PAN_WRITEOUT_Z)
z = bi_src_index(&instr->src[2]);
if (writeout & PAN_WRITEOUT_S)
s = bi_src_index(&instr->src[3]);
bi_zs_emit_to(b, bi_register(60), z, s,
bi_register(60) /* TODO RA */,
writeout & PAN_WRITEOUT_S,
writeout & PAN_WRITEOUT_Z);
}
if (emit_blend) {
unsigned loc = var->data.location;
assert(loc == FRAG_RESULT_COLOR || loc >= FRAG_RESULT_DATA0);
unsigned rt = loc == FRAG_RESULT_COLOR ? 0 :
(loc - FRAG_RESULT_DATA0);
bi_emit_blend_op(b, bi_src_index(&instr->src[0]),
nir_intrinsic_src_type(instr), rt);
}
if (b->shader->is_blend) {
/* Jump back to the fragment shader, return address is stored
* in r48 (see above).
*/
bi_jump_to(b, bi_null(), bi_register(48));
}
}
static void static void
bi_emit_frag_out(bi_context *ctx, nir_intrinsic_instr *instr) bi_emit_frag_out(bi_context *ctx, nir_intrinsic_instr *instr)
{ {