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pan/blend: Allow passing blend constants through a sysval

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This is needed to allow lowering blend operations in fragment shaders
when the blend operation uses dynamic blend constants.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13060>
This commit is contained in:
Boris Brezillon 2021-09-06 13:08:45 +02:00
parent 7cd402c9c8
commit 2f68c58767
4 changed files with 12 additions and 0 deletions
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5
src/panfrost/bifrost/bifrost_compile.c
View file

@ -1337,6 +1337,11 @@ bi_emit_intrinsic(bi_builder *b, nir_intrinsic_instr *instr)
nir_dest_num_components(instr->dest), 0);
break;
case nir_intrinsic_load_blend_const_color_rgba:
bi_load_sysval_nir(b, instr,
nir_dest_num_components(instr->dest), 0);
break;
case nir_intrinsic_load_sample_positions_pan:
bi_mov_i32_to(b, bi_word(dst, 0),
bi_fau(BIR_FAU_SAMPLE_POS_ARRAY, false));

4
src/panfrost/midgard/midgard_compile.c
View file

@ -2037,6 +2037,10 @@ emit_intrinsic(compiler_context *ctx, nir_intrinsic_instr *instr)
emit_sysval_read(ctx, &instr->instr, 3, 0);
break;
case nir_intrinsic_load_blend_const_color_rgba:
emit_sysval_read(ctx, &instr->instr, 4, 0);
break;
case nir_intrinsic_load_workgroup_id:
case nir_intrinsic_load_local_invocation_id:
case nir_intrinsic_load_global_invocation_id:

1
src/panfrost/util/pan_ir.h
View file

@ -58,6 +58,7 @@ enum {
PAN_SYSVAL_RT_CONVERSION = 13,
PAN_SYSVAL_VERTEX_INSTANCE_OFFSETS = 14,
PAN_SYSVAL_DRAWID = 15,
PAN_SYSVAL_BLEND_CONSTANTS = 16,
};
#define PAN_TXS_SYSVAL_ID(texidx, dim, is_array) \

2
src/panfrost/util/pan_sysval.c
View file

@ -91,6 +91,8 @@ panfrost_nir_sysval_for_intrinsic(nir_intrinsic_instr *instr)
return panfrost_sysval_for_sampler(instr);
case nir_intrinsic_image_size:
return panfrost_sysval_for_image_size(instr);
case nir_intrinsic_load_blend_const_color_rgba:
return PAN_SYSVAL_BLEND_CONSTANTS;
default:
return ~0;
}