From: Dave Airlie <[email protected]> This adds support to write to sample mask from the fragment shader.
We can optimise this later like radeonsi. Signed-off-by: Dave Airlie <[email protected]> --- src/amd/common/ac_nir_to_llvm.c | 8 ++++++-- src/amd/common/ac_nir_to_llvm.h | 1 + src/amd/vulkan/radv_cmd_buffer.c | 2 ++ 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c index 6021647..9778581 100644 --- a/src/amd/common/ac_nir_to_llvm.c +++ b/src/amd/common/ac_nir_to_llvm.c @@ -4753,13 +4753,17 @@ handle_fs_outputs_post(struct nir_to_llvm_context *ctx) ctx->shader_info->fs.writes_stencil = true; stencil = to_float(ctx, LLVMBuildLoad(ctx->builder, ctx->outputs[radeon_llvm_reg_index_soa(i, 0)], "")); + } else if (i == FRAG_RESULT_SAMPLE_MASK) { + ctx->shader_info->fs.writes_sample_mask = true; + samplemask = to_float(ctx, LLVMBuildLoad(ctx->builder, + ctx->outputs[radeon_llvm_reg_index_soa(i, 0)], "")); } else { bool last = false; for (unsigned j = 0; j < 4; j++) values[j] = to_float(ctx, LLVMBuildLoad(ctx->builder, ctx->outputs[radeon_llvm_reg_index_soa(i, j)], "")); - if (!ctx->shader_info->fs.writes_z && !ctx->shader_info->fs.writes_stencil) + if (!ctx->shader_info->fs.writes_z && !ctx->shader_info->fs.writes_stencil && !ctx->shader_info->fs.writes_sample_mask) last = ctx->output_mask <= ((1ull << (i + 1)) - 1); si_export_mrt_color(ctx, values, V_008DFC_SQ_EXP_MRT + index, last); @@ -4767,7 +4771,7 @@ handle_fs_outputs_post(struct nir_to_llvm_context *ctx) } } - if (depth || stencil) + if (depth || stencil || samplemask) si_export_mrt_z(ctx, depth, stencil, samplemask); else if (!index) si_export_mrt_color(ctx, NULL, V_008DFC_SQ_EXP_NULL, true); diff --git a/src/amd/common/ac_nir_to_llvm.h b/src/amd/common/ac_nir_to_llvm.h index c2662e2..6c2b78b 100644 --- a/src/amd/common/ac_nir_to_llvm.h +++ b/src/amd/common/ac_nir_to_llvm.h @@ -118,6 +118,7 @@ struct ac_shader_variant_info { bool can_discard; bool writes_z; bool writes_stencil; + bool writes_sample_mask; bool early_fragment_test; bool writes_memory; bool force_persample; diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c index 5b7564c..1e38cbe 100644 --- a/src/amd/vulkan/radv_cmd_buffer.c +++ b/src/amd/vulkan/radv_cmd_buffer.c @@ -674,6 +674,7 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer, S_02880C_Z_EXPORT_ENABLE(ps->info.fs.writes_z) | S_02880C_STENCIL_TEST_VAL_EXPORT_ENABLE(ps->info.fs.writes_stencil) | S_02880C_KILL_ENABLE(!!ps->info.fs.can_discard) | + S_02880C_MASK_EXPORT_ENABLE(ps->info.fs.writes_sample_mask) | S_02880C_Z_ORDER(z_order) | S_02880C_DEPTH_BEFORE_SHADER(ps->info.fs.early_fragment_test) | S_02880C_EXEC_ON_HIER_FAIL(ps->info.fs.writes_memory) | @@ -694,6 +695,7 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer, radeon_set_context_reg(cmd_buffer->cs, R_0286E0_SPI_BARYC_CNTL, spi_baryc_cntl); radeon_set_context_reg(cmd_buffer->cs, R_028710_SPI_SHADER_Z_FORMAT, + ps->info.fs.writes_sample_mask ? V_028710_SPI_SHADER_32_ABGR : ps->info.fs.writes_stencil ? V_028710_SPI_SHADER_32_GR : ps->info.fs.writes_z ? V_028710_SPI_SHADER_32_R : V_028710_SPI_SHADER_ZERO); -- 2.9.3 _______________________________________________ mesa-dev mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-dev
