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-rw-r--r--src/gallium/drivers/radeonsi/si_shader.c70
-rw-r--r--src/gallium/drivers/radeonsi/si_shader.h5
-rw-r--r--src/gallium/drivers/radeonsi/si_state_shaders.c6
3 files changed, 76 insertions, 5 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 43619dd329d..d151ba4c5c4 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -98,10 +98,10 @@ static void si_build_ps_prolog_function(struct si_shader_context *ctx,
static void si_build_ps_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
-/* Ideally pass the sample mask input to the PS epilog as v13, which
+/* Ideally pass the sample mask input to the PS epilog as v14, which
* is its usual location, so that the shader doesn't have to add v_mov.
*/
-#define PS_EPILOG_SAMPLEMASK_MIN_LOC 13
+#define PS_EPILOG_SAMPLEMASK_MIN_LOC 14
enum {
CONST_ADDR_SPACE = 2,
@@ -4553,6 +4553,7 @@ static void create_function(struct si_shader_context *ctx)
shader->info.face_vgpr_index = 20;
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->i32,
&ctx->abi.ancillary, SI_PARAM_ANCILLARY);
+ shader->info.ancillary_vgpr_index = 21;
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.sample_coverage, SI_PARAM_SAMPLE_COVERAGE);
add_arg_checked(&fninfo, ARG_VGPR, ctx->i32, SI_PARAM_POS_FIXED_PT);
@@ -4624,6 +4625,7 @@ static void create_function(struct si_shader_context *ctx)
S_0286D0_LINEAR_CENTER_ENA(1) |
S_0286D0_LINEAR_CENTROID_ENA(1) |
S_0286D0_FRONT_FACE_ENA(1) |
+ S_0286D0_ANCILLARY_ENA(1) |
S_0286D0_POS_FIXED_PT_ENA(1));
}
@@ -5830,6 +5832,7 @@ static void si_get_ps_prolog_key(struct si_shader *shader,
key->ps_prolog.states.force_linear_center_interp ||
key->ps_prolog.states.bc_optimize_for_persp ||
key->ps_prolog.states.bc_optimize_for_linear);
+ key->ps_prolog.ancillary_vgpr_index = shader->info.ancillary_vgpr_index;
if (info->colors_read) {
unsigned *color = shader->selector->color_attr_index;
@@ -5939,7 +5942,8 @@ static bool si_need_ps_prolog(const union si_shader_part_key *key)
key->ps_prolog.states.force_linear_center_interp ||
key->ps_prolog.states.bc_optimize_for_persp ||
key->ps_prolog.states.bc_optimize_for_linear ||
- key->ps_prolog.states.poly_stipple;
+ key->ps_prolog.states.poly_stipple ||
+ key->ps_prolog.states.samplemask_log_ps_iter;
}
/**
@@ -6583,6 +6587,7 @@ int si_compile_tgsi_shader(struct si_screen *sscreen,
if (ctx.type == PIPE_SHADER_FRAGMENT) {
shader->info.num_input_vgprs = 0;
shader->info.face_vgpr_index = -1;
+ shader->info.ancillary_vgpr_index = -1;
if (G_0286CC_PERSP_SAMPLE_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
@@ -6612,8 +6617,10 @@ int si_compile_tgsi_shader(struct si_screen *sscreen,
shader->info.face_vgpr_index = shader->info.num_input_vgprs;
shader->info.num_input_vgprs += 1;
}
- if (G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr))
+ if (G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr)) {
+ shader->info.ancillary_vgpr_index = shader->info.num_input_vgprs;
shader->info.num_input_vgprs += 1;
+ }
if (G_0286CC_SAMPLE_COVERAGE_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_FIXED_PT_ENA(shader->config.spi_ps_input_addr))
@@ -7285,6 +7292,54 @@ static void si_build_ps_prolog_function(struct si_shader_context *ctx,
}
}
+ /* Section 15.2.2 (Shader Inputs) of the OpenGL 4.5 (Core Profile) spec
+ * says:
+ *
+ * "When per-sample shading is active due to the use of a fragment
+ * input qualified by sample or due to the use of the gl_SampleID
+ * or gl_SamplePosition variables, only the bit for the current
+ * sample is set in gl_SampleMaskIn. When state specifies multiple
+ * fragment shader invocations for a given fragment, the sample
+ * mask for any single fragment shader invocation may specify a
+ * subset of the covered samples for the fragment. In this case,
+ * the bit corresponding to each covered sample will be set in
+ * exactly one fragment shader invocation."
+ *
+ * The samplemask loaded by hardware is always the coverage of the
+ * entire pixel/fragment, so mask bits out based on the sample ID.
+ */
+ if (key->ps_prolog.states.samplemask_log_ps_iter) {
+ /* The bit pattern matches that used by fixed function fragment
+ * processing. */
+ static const uint16_t ps_iter_masks[] = {
+ 0xffff, /* not used */
+ 0x5555,
+ 0x1111,
+ 0x0101,
+ 0x0001,
+ };
+ assert(key->ps_prolog.states.samplemask_log_ps_iter < ARRAY_SIZE(ps_iter_masks));
+
+ uint32_t ps_iter_mask = ps_iter_masks[key->ps_prolog.states.samplemask_log_ps_iter];
+ unsigned ancillary_vgpr = key->ps_prolog.num_input_sgprs +
+ key->ps_prolog.ancillary_vgpr_index;
+ LLVMValueRef sampleid = unpack_param(ctx, ancillary_vgpr, 8, 4);
+ LLVMValueRef samplemask = LLVMGetParam(func, ancillary_vgpr + 1);
+
+ samplemask = LLVMBuildBitCast(gallivm->builder, samplemask, ctx->i32, "");
+ samplemask = LLVMBuildAnd(
+ gallivm->builder,
+ samplemask,
+ LLVMBuildShl(gallivm->builder,
+ LLVMConstInt(ctx->i32, ps_iter_mask, false),
+ sampleid, ""),
+ "");
+ samplemask = LLVMBuildBitCast(gallivm->builder, samplemask, ctx->f32, "");
+
+ ret = LLVMBuildInsertValue(gallivm->builder, ret, samplemask,
+ ancillary_vgpr + 1, "");
+ }
+
/* Tell LLVM to insert WQM instruction sequence when needed. */
if (key->ps_prolog.wqm) {
LLVMAddTargetDependentFunctionAttr(func,
@@ -7481,6 +7536,12 @@ static bool si_shader_select_ps_parts(struct si_screen *sscreen,
assert(G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_addr));
}
+ /* Samplemask fixup requires the sample ID. */
+ if (shader->key.part.ps.prolog.samplemask_log_ps_iter) {
+ shader->config.spi_ps_input_ena |= S_0286CC_ANCILLARY_ENA(1);
+ assert(G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr));
+ }
+
/* The sample mask input is always enabled, because the API shader always
* passes it through to the epilog. Disable it here if it's unused.
*/
@@ -7565,6 +7626,7 @@ int si_shader_create(struct si_screen *sscreen, LLVMTargetMachineRef tm,
shader->info.num_input_sgprs = mainp->info.num_input_sgprs;
shader->info.num_input_vgprs = mainp->info.num_input_vgprs;
shader->info.face_vgpr_index = mainp->info.face_vgpr_index;
+ shader->info.ancillary_vgpr_index = mainp->info.ancillary_vgpr_index;
memcpy(shader->info.vs_output_param_offset,
mainp->info.vs_output_param_offset,
sizeof(mainp->info.vs_output_param_offset));
diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index 4592ac551ce..641f49cbac2 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -424,6 +424,7 @@ struct si_ps_prolog_bits {
unsigned force_linear_center_interp:1;
unsigned bc_optimize_for_persp:1;
unsigned bc_optimize_for_linear:1;
+ unsigned samplemask_log_ps_iter:3;
};
/* Common PS bits between the shader key and the epilog key. */
@@ -465,6 +466,7 @@ union si_shader_part_key {
unsigned colors_read:8; /* color input components read */
unsigned num_interp_inputs:5; /* BCOLOR is at this location */
unsigned face_vgpr_index:5;
+ unsigned ancillary_vgpr_index:5;
unsigned wqm:1;
char color_attr_index[2];
char color_interp_vgpr_index[2]; /* -1 == constant */
@@ -557,7 +559,8 @@ struct si_shader_info {
ubyte vs_output_param_offset[SI_MAX_VS_OUTPUTS];
ubyte num_input_sgprs;
ubyte num_input_vgprs;
- char face_vgpr_index;
+ signed char face_vgpr_index;
+ signed char ancillary_vgpr_index;
bool uses_instanceid;
ubyte nr_pos_exports;
ubyte nr_param_exports;
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index ac8b65e398c..6d87cab9883 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1425,6 +1425,12 @@ static inline void si_shader_selector_key(struct pipe_context *ctx,
sctx->framebuffer.nr_samples <= 1;
key->part.ps.epilog.clamp_color = rs->clamp_fragment_color;
+ if (sctx->ps_iter_samples > 1 &&
+ sel->info.reads_samplemask) {
+ key->part.ps.prolog.samplemask_log_ps_iter =
+ util_logbase2(util_next_power_of_two(sctx->ps_iter_samples));
+ }
+
if (rs->force_persample_interp &&
rs->multisample_enable &&
sctx->framebuffer.nr_samples > 1 &&
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 13:44:31 +0000