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authorVadim Girlin <[email protected]>2012-06-11 13:11:47 +0400
committerVadim Girlin <[email protected]>2012-06-27 02:06:55 +0400
commit4acf71f01ea1edb253cd38cc059d4af1a2a40bf4 (patch)
treef735a384fda706b02f0c12fb3e391e5496490c26 /src/gallium
parent55a89889ba8b9e58fdccf9d363d22aac93ba1281 (diff)
r600g: cache shader variants instead of rebuilding v3
Shader variants are stored in the list, the key for lookup is based on the states that require different hw shaders - currently it's rctx->two_side (all gpus) and rctx->nr_cbufs (evergreen/cayman, when writes_all property is set). v2: - use simple list instead of keymap as suggested by Marek on irc - call r600_adjust_gprs from r600_bind_vs_shader for r6xx/r7xx (r600_shader_select isn't used for vertex shaders currently) v3: - fix call to r600_adjust_gprs - do it after updating current shader Improves performance for some apps, e.g. FlightGear - see https://bugs.freedesktop.org/show_bug.cgi?id=50360 Signed-off-by: Vadim Girlin <[email protected]>
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/r600/evergreen_state.c4
-rw-r--r--src/gallium/drivers/r600/r600_pipe.h38
-rw-r--r--src/gallium/drivers/r600/r600_shader.c19
-rw-r--r--src/gallium/drivers/r600/r600_state.c23
-rw-r--r--src/gallium/drivers/r600/r600_state_common.c227
5 files changed, 217 insertions, 94 deletions
diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index d6ed20d6cf9..4b82b06f177 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -1848,12 +1848,12 @@ void evergreen_init_state_functions(struct r600_context *rctx)
rctx->context.create_blend_state = evergreen_create_blend_state;
rctx->context.create_depth_stencil_alpha_state = evergreen_create_dsa_state;
- rctx->context.create_fs_state = r600_create_shader_state;
+ rctx->context.create_fs_state = r600_create_shader_state_ps;
rctx->context.create_rasterizer_state = evergreen_create_rs_state;
rctx->context.create_sampler_state = evergreen_create_sampler_state;
rctx->context.create_sampler_view = evergreen_create_sampler_view;
rctx->context.create_vertex_elements_state = r600_create_vertex_elements;
- rctx->context.create_vs_state = r600_create_shader_state;
+ rctx->context.create_vs_state = r600_create_shader_state_vs;
rctx->context.bind_blend_state = r600_bind_blend_state;
rctx->context.bind_depth_stencil_alpha_state = r600_bind_dsa_state;
rctx->context.bind_fragment_sampler_states = evergreen_bind_ps_sampler;
diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h
index 9806e5b261d..5d194e325f7 100644
--- a/src/gallium/drivers/r600/r600_pipe.h
+++ b/src/gallium/drivers/r600/r600_pipe.h
@@ -185,18 +185,38 @@ struct r600_vertex_element
struct r600_pipe_state rstate;
};
+struct r600_pipe_shader;
+
+struct r600_pipe_shader_selector {
+ struct r600_pipe_shader *current;
+
+ struct tgsi_token *tokens;
+ struct pipe_stream_output_info so;
+
+ unsigned num_shaders;
+
+ /* PIPE_SHADER_[VERTEX|FRAGMENT|...] */
+ unsigned type;
+
+ /* 1 on evergreen+ when the shader contains
+ * TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS, otherwise it's 0.
+ * Used to determine whether we need to include nr_cbufs in the key */
+ unsigned eg_fs_write_all;
+};
+
struct r600_pipe_shader {
+ struct r600_pipe_shader_selector *selector;
+ struct r600_pipe_shader *next_variant;
struct r600_shader shader;
struct r600_pipe_state rstate;
struct r600_resource *bo;
struct r600_resource *bo_fetch;
struct r600_vertex_element vertex_elements;
- struct tgsi_token *tokens;
unsigned sprite_coord_enable;
unsigned flatshade;
unsigned pa_cl_vs_out_cntl;
- unsigned ps_cb_shader_mask;
- struct pipe_stream_output_info so;
+ unsigned ps_cb_shader_mask;
+ unsigned key;
};
struct r600_pipe_sampler_state {
@@ -272,8 +292,8 @@ struct r600_context {
struct pipe_stencil_ref stencil_ref;
struct pipe_viewport_state viewport;
struct pipe_clip_state clip;
- struct r600_pipe_shader *ps_shader;
- struct r600_pipe_shader *vs_shader;
+ struct r600_pipe_shader_selector *ps_shader;
+ struct r600_pipe_shader_selector *vs_shader;
struct r600_pipe_compute *cs_shader;
struct r600_pipe_rasterizer *rasterizer;
struct r600_pipe_state vgt;
@@ -436,8 +456,6 @@ int r600_compute_shader_create(struct pipe_context * ctx,
LLVMModuleRef mod, struct r600_bytecode * bytecode);
#endif
void r600_pipe_shader_destroy(struct pipe_context *ctx, struct r600_pipe_shader *shader);
-int r600_find_vs_semantic_index(struct r600_shader *vs,
- struct r600_shader *ps, int id);
/* r600_state.c */
void r600_set_scissor_state(struct r600_context *rctx,
@@ -497,8 +515,10 @@ void r600_sampler_view_destroy(struct pipe_context *ctx,
struct pipe_sampler_view *state);
void r600_delete_state(struct pipe_context *ctx, void *state);
void r600_bind_vertex_elements(struct pipe_context *ctx, void *state);
-void *r600_create_shader_state(struct pipe_context *ctx,
- const struct pipe_shader_state *state);
+void *r600_create_shader_state_ps(struct pipe_context *ctx,
+ const struct pipe_shader_state *state);
+void *r600_create_shader_state_vs(struct pipe_context *ctx,
+ const struct pipe_shader_state *state);
void r600_bind_ps_shader(struct pipe_context *ctx, void *state);
void r600_bind_vs_shader(struct pipe_context *ctx, void *state);
void r600_delete_ps_shader(struct pipe_context *ctx, void *state);
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index d294084de9c..f690c10fd7c 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -109,6 +109,7 @@ int r600_pipe_shader_create(struct pipe_context *ctx, struct r600_pipe_shader *s
{
static int dump_shaders = -1;
struct r600_context *rctx = (struct r600_context *)ctx;
+ struct r600_pipe_shader_selector *sel = shader->selector;
int r;
/* Would like some magic "get_bool_option_once" routine.
@@ -118,16 +119,16 @@ int r600_pipe_shader_create(struct pipe_context *ctx, struct r600_pipe_shader *s
if (dump_shaders) {
fprintf(stderr, "--------------------------------------------------------------\n");
- tgsi_dump(shader->tokens, 0);
+ tgsi_dump(sel->tokens, 0);
- if (shader->so.num_outputs) {
+ if (sel->so.num_outputs) {
unsigned i;
fprintf(stderr, "STREAMOUT\n");
- for (i = 0; i < shader->so.num_outputs; i++) {
- unsigned mask = ((1 << shader->so.output[i].num_components) - 1) <<
- shader->so.output[i].start_component;
+ for (i = 0; i < sel->so.num_outputs; i++) {
+ unsigned mask = ((1 << sel->so.output[i].num_components) - 1) <<
+ sel->so.output[i].start_component;
fprintf(stderr, " %i: MEM_STREAM0_BUF%i OUT[%i].%s%s%s%s\n", i,
- shader->so.output[i].output_buffer, shader->so.output[i].register_index,
+ sel->so.output[i].output_buffer, sel->so.output[i].register_index,
mask & 1 ? "x" : "_",
(mask >> 1) & 1 ? "y" : "_",
(mask >> 2) & 1 ? "z" : "_",
@@ -156,8 +157,6 @@ void r600_pipe_shader_destroy(struct pipe_context *ctx, struct r600_pipe_shader
{
pipe_resource_reference((struct pipe_resource**)&shader->bo, NULL);
r600_bytecode_clear(&shader->shader.bc);
-
- memset(&shader->shader,0,sizeof(struct r600_shader));
}
/*
@@ -1118,8 +1117,8 @@ static int process_twoside_color_inputs(struct r600_shader_ctx *ctx)
static int r600_shader_from_tgsi(struct r600_context * rctx, struct r600_pipe_shader *pipeshader)
{
struct r600_shader *shader = &pipeshader->shader;
- struct tgsi_token *tokens = pipeshader->tokens;
- struct pipe_stream_output_info so = pipeshader->so;
+ struct tgsi_token *tokens = pipeshader->selector->tokens;
+ struct pipe_stream_output_info so = pipeshader->selector->so;
struct tgsi_full_immediate *immediate;
struct tgsi_full_property *property;
struct r600_shader_ctx ctx;
diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 3ac9b8d396b..295453a5aef 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -1810,12 +1810,12 @@ void r600_init_state_functions(struct r600_context *rctx)
rctx->context.create_blend_state = r600_create_blend_state;
rctx->context.create_depth_stencil_alpha_state = r600_create_dsa_state;
- rctx->context.create_fs_state = r600_create_shader_state;
+ rctx->context.create_fs_state = r600_create_shader_state_ps;
rctx->context.create_rasterizer_state = r600_create_rs_state;
rctx->context.create_sampler_state = r600_create_sampler_state;
rctx->context.create_sampler_view = r600_create_sampler_view;
rctx->context.create_vertex_elements_state = r600_create_vertex_elements;
- rctx->context.create_vs_state = r600_create_shader_state;
+ rctx->context.create_vs_state = r600_create_shader_state_vs;
rctx->context.bind_blend_state = r600_bind_blend_state;
rctx->context.bind_depth_stencil_alpha_state = r600_bind_dsa_state;
rctx->context.bind_fragment_sampler_states = r600_bind_ps_samplers;
@@ -1851,6 +1851,7 @@ void r600_init_state_functions(struct r600_context *rctx)
rctx->context.set_stream_output_targets = r600_set_so_targets;
}
+/* Adjust GPR allocation on R6xx/R7xx */
void r600_adjust_gprs(struct r600_context *rctx)
{
struct r600_pipe_state rstate;
@@ -1859,22 +1860,22 @@ void r600_adjust_gprs(struct r600_context *rctx)
unsigned tmp;
int diff;
- if (rctx->chip_class >= EVERGREEN)
- return;
-
- if (!rctx->ps_shader || !rctx->vs_shader)
- return;
+ /* XXX: Following call moved from r600_bind_[ps|vs]_shader,
+ * it seems eg+ doesn't need it, r6xx/7xx probably need it only for
+ * adjusting the GPR allocation?
+ * Do we need this if we aren't really changing config below? */
+ r600_inval_shader_cache(rctx);
- if (rctx->ps_shader->shader.bc.ngpr > rctx->default_ps_gprs)
+ if (rctx->ps_shader->current->shader.bc.ngpr > rctx->default_ps_gprs)
{
- diff = rctx->ps_shader->shader.bc.ngpr - rctx->default_ps_gprs;
+ diff = rctx->ps_shader->current->shader.bc.ngpr - rctx->default_ps_gprs;
num_vs_gprs -= diff;
num_ps_gprs += diff;
}
- if (rctx->vs_shader->shader.bc.ngpr > rctx->default_vs_gprs)
+ if (rctx->vs_shader->current->shader.bc.ngpr > rctx->default_vs_gprs)
{
- diff = rctx->vs_shader->shader.bc.ngpr - rctx->default_vs_gprs;
+ diff = rctx->vs_shader->current->shader.bc.ngpr - rctx->default_vs_gprs;
num_ps_gprs -= diff;
num_vs_gprs += diff;
}
diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
index a2ea42f9c5f..879dcc50edb 100644
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -429,39 +429,146 @@ void *r600_create_vertex_elements(struct pipe_context *ctx,
return v;
}
-void *r600_create_shader_state(struct pipe_context *ctx,
- const struct pipe_shader_state *state)
+/* Compute the key for the hw shader variant */
+static INLINE unsigned r600_shader_selector_key(struct pipe_context * ctx,
+ struct r600_pipe_shader_selector * sel)
{
- struct r600_pipe_shader *shader = CALLOC_STRUCT(r600_pipe_shader);
+ struct r600_context *rctx = (struct r600_context *)ctx;
+ unsigned key;
+
+ if (sel->type == PIPE_SHADER_FRAGMENT) {
+ key = rctx->two_side;
+ if (sel->eg_fs_write_all)
+ key |= rctx->nr_cbufs << 1;
+ } else
+ key = 0;
+
+ return key;
+}
+
+/* Select the hw shader variant depending on the current state.
+ * (*dirty) is set to 1 if current variant was changed */
+static int r600_shader_select(struct pipe_context *ctx,
+ struct r600_pipe_shader_selector* sel,
+ unsigned *dirty)
+{
+ unsigned key;
+ struct r600_context *rctx = (struct r600_context *)ctx;
+ struct r600_pipe_shader * shader = NULL;
int r;
- shader->tokens = tgsi_dup_tokens(state->tokens);
- shader->so = state->stream_output;
+ key = r600_shader_selector_key(ctx, sel);
- r = r600_pipe_shader_create(ctx, shader);
- if (r) {
- return NULL;
+ /* Check if we don't need to change anything.
+ * This path is also used for most shaders that don't need multiple
+ * variants, it will cost just a computation of the key and this
+ * test. */
+ if (likely(sel->current && sel->current->key == key)) {
+ return 0;
+ }
+
+ /* lookup if we have other variants in the list */
+ if (sel->num_shaders > 1) {
+ struct r600_pipe_shader *p = sel->current, *c = p->next_variant;
+
+ while (c && c->key != key) {
+ p = c;
+ c = c->next_variant;
+ }
+
+ if (c) {
+ p->next_variant = c->next_variant;
+ shader = c;
+ }
+ }
+
+ if (unlikely(!shader)) {
+ shader = CALLOC(1, sizeof(struct r600_pipe_shader));
+ shader->selector = sel;
+
+ r = r600_pipe_shader_create(ctx, shader);
+ if (unlikely(r)) {
+ R600_ERR("Failed to build shader variant (type=%u, key=%u) %d\n",
+ sel->type, key, r);
+ sel->current = NULL;
+ return r;
+ }
+
+ /* We don't know the value of eg_fs_write_all property until we built
+ * at least one variant, so we may need to recompute the key (include
+ * rctx->nr_cbufs) after building first variant. */
+ if (sel->type == PIPE_SHADER_FRAGMENT &&
+ sel->num_shaders == 0 &&
+ rctx->chip_class >= EVERGREEN &&
+ shader->shader.fs_write_all) {
+ sel->eg_fs_write_all = 1;
+ key = r600_shader_selector_key(ctx, sel);
+ }
+
+ shader->key = key;
+ sel->num_shaders++;
+ }
+
+ if (dirty)
+ *dirty = 1;
+
+ shader->next_variant = sel->current;
+ sel->current = shader;
+
+ /* Moved from r600_bind_ps_shader, different shader variants
+ * may use different number of GPRs, so we need to update it. */
+ /* FIXME: we never did it after rebuilding the shaders, is it required? */
+ if (rctx->chip_class < EVERGREEN && rctx->ps_shader && rctx->vs_shader) {
+ r600_adjust_gprs(rctx);
}
- return shader;
+
+ return 0;
+}
+
+static void *r600_create_shader_state(struct pipe_context *ctx,
+ const struct pipe_shader_state *state,
+ unsigned pipe_shader_type)
+{
+ struct r600_pipe_shader_selector *sel = CALLOC_STRUCT(r600_pipe_shader_selector);
+ int r;
+
+ sel->type = pipe_shader_type;
+ sel->tokens = tgsi_dup_tokens(state->tokens);
+ sel->so = state->stream_output;
+
+ r = r600_shader_select(ctx, sel, NULL);
+ if (r)
+ return NULL;
+
+ return sel;
+}
+
+void *r600_create_shader_state_ps(struct pipe_context *ctx,
+ const struct pipe_shader_state *state)
+{
+ return r600_create_shader_state(ctx, state, PIPE_SHADER_FRAGMENT);
+}
+
+void *r600_create_shader_state_vs(struct pipe_context *ctx,
+ const struct pipe_shader_state *state)
+{
+ return r600_create_shader_state(ctx, state, PIPE_SHADER_VERTEX);
}
void r600_bind_ps_shader(struct pipe_context *ctx, void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
- if (!state) {
+ if (!state)
state = rctx->dummy_pixel_shader;
- }
-
- rctx->ps_shader = (struct r600_pipe_shader *)state;
- r600_inval_shader_cache(rctx);
- r600_context_pipe_state_set(rctx, &rctx->ps_shader->rstate);
+ rctx->ps_shader = (struct r600_pipe_shader_selector *)state;
+ r600_context_pipe_state_set(rctx, &rctx->ps_shader->current->rstate);
rctx->cb_color_control &= C_028808_MULTIWRITE_ENABLE;
- rctx->cb_color_control |= S_028808_MULTIWRITE_ENABLE(!!rctx->ps_shader->shader.fs_write_all);
+ rctx->cb_color_control |= S_028808_MULTIWRITE_ENABLE(!!rctx->ps_shader->current->shader.fs_write_all);
- if (rctx->ps_shader && rctx->vs_shader) {
+ if (rctx->chip_class < EVERGREEN && rctx->vs_shader) {
r600_adjust_gprs(rctx);
}
}
@@ -470,42 +577,53 @@ void r600_bind_vs_shader(struct pipe_context *ctx, void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
- rctx->vs_shader = (struct r600_pipe_shader *)state;
+ rctx->vs_shader = (struct r600_pipe_shader_selector *)state;
if (state) {
- r600_inval_shader_cache(rctx);
- r600_context_pipe_state_set(rctx, &rctx->vs_shader->rstate);
+ r600_context_pipe_state_set(rctx, &rctx->vs_shader->current->rstate);
+
+ if (rctx->chip_class < EVERGREEN && rctx->ps_shader)
+ r600_adjust_gprs(rctx);
}
- if (rctx->ps_shader && rctx->vs_shader) {
- r600_adjust_gprs(rctx);
+}
+
+static void r600_delete_shader_selector(struct pipe_context *ctx,
+ struct r600_pipe_shader_selector *sel)
+{
+ struct r600_pipe_shader *p = sel->current, *c;
+ while (p) {
+ c = p->next_variant;
+ r600_pipe_shader_destroy(ctx, p);
+ free(p);
+ p = c;
}
+
+ free(sel->tokens);
+ free(sel);
}
+
void r600_delete_ps_shader(struct pipe_context *ctx, void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
- struct r600_pipe_shader *shader = (struct r600_pipe_shader *)state;
+ struct r600_pipe_shader_selector *sel = (struct r600_pipe_shader_selector *)state;
- if (rctx->ps_shader == shader) {
+ if (rctx->ps_shader == sel) {
rctx->ps_shader = NULL;
}
- free(shader->tokens);
- r600_pipe_shader_destroy(ctx, shader);
- free(shader);
+ r600_delete_shader_selector(ctx, sel);
}
void r600_delete_vs_shader(struct pipe_context *ctx, void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
- struct r600_pipe_shader *shader = (struct r600_pipe_shader *)state;
+ struct r600_pipe_shader_selector *sel = (struct r600_pipe_shader_selector *)state;
- if (rctx->vs_shader == shader) {
+ if (rctx->vs_shader == sel) {
rctx->vs_shader = NULL;
}
- free(shader->tokens);
- r600_pipe_shader_destroy(ctx, shader);
- free(shader);
+ r600_delete_shader_selector(ctx, sel);
}
static void r600_update_alpha_ref(struct r600_context *rctx)
@@ -661,24 +779,10 @@ void r600_set_so_targets(struct pipe_context *ctx,
rctx->streamout_append_bitmask = append_bitmask;
}
-static int r600_shader_rebuild(struct pipe_context * ctx, struct r600_pipe_shader * shader)
-{
- struct r600_context *rctx = (struct r600_context *)ctx;
- int r;
-
- r600_pipe_shader_destroy(ctx, shader);
- r = r600_pipe_shader_create(ctx, shader);
- if (r) {
- return r;
- }
- r600_context_pipe_state_set(rctx, &shader->rstate);
-
- return 0;
-}
-
static void r600_update_derived_state(struct r600_context *rctx)
{
struct pipe_context * ctx = (struct pipe_context*)rctx;
+ unsigned ps_dirty = 0;
if (!rctx->blitter->running) {
if (rctx->have_depth_fb || rctx->have_depth_texture)
@@ -689,30 +793,29 @@ static void r600_update_derived_state(struct r600_context *rctx)
r600_update_sampler_states(rctx);
}
- if ((rctx->ps_shader->shader.two_side != rctx->two_side) ||
- ((rctx->chip_class >= EVERGREEN) && rctx->ps_shader->shader.fs_write_all &&
- (rctx->ps_shader->shader.nr_cbufs != rctx->nr_cbufs))) {
- r600_shader_rebuild(&rctx->context, rctx->ps_shader);
- }
+ r600_shader_select(ctx, rctx->ps_shader, &ps_dirty);
if (rctx->alpha_ref_dirty) {
r600_update_alpha_ref(rctx);
}
if (rctx->ps_shader && ((rctx->sprite_coord_enable &&
- (rctx->ps_shader->sprite_coord_enable != rctx->sprite_coord_enable)) ||
- (rctx->rasterizer && rctx->rasterizer->flatshade != rctx->ps_shader->flatshade))) {
+ (rctx->ps_shader->current->sprite_coord_enable != rctx->sprite_coord_enable)) ||
+ (rctx->rasterizer && rctx->rasterizer->flatshade != rctx->ps_shader->current->flatshade))) {
if (rctx->chip_class >= EVERGREEN)
- evergreen_pipe_shader_ps(ctx, rctx->ps_shader);
+ evergreen_pipe_shader_ps(ctx, rctx->ps_shader->current);
else
- r600_pipe_shader_ps(ctx, rctx->ps_shader);
+ r600_pipe_shader_ps(ctx, rctx->ps_shader->current);
- r600_context_pipe_state_set(rctx, &rctx->ps_shader->rstate);
+ ps_dirty = 1;
}
+ if (ps_dirty)
+ r600_context_pipe_state_set(rctx, &rctx->ps_shader->current->rstate);
+
if (rctx->dual_src_blend)
- rctx->cb_shader_mask = rctx->ps_shader->ps_cb_shader_mask | rctx->fb_cb_shader_mask;
+ rctx->cb_shader_mask = rctx->ps_shader->current->ps_cb_shader_mask | rctx->fb_cb_shader_mask;
else
rctx->cb_shader_mask = rctx->fb_cb_shader_mask;
}
@@ -827,12 +930,12 @@ void r600_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *dinfo)
if (rctx->chip_class <= R700)
r600_pipe_state_mod_reg(&rctx->vgt, rctx->cb_color_control);
r600_pipe_state_mod_reg(&rctx->vgt,
- rctx->vs_shader->pa_cl_vs_out_cntl |
- (rctx->rasterizer->clip_plane_enable & rctx->vs_shader->shader.clip_dist_write));
+ rctx->vs_shader->current->pa_cl_vs_out_cntl |
+ (rctx->rasterizer->clip_plane_enable & rctx->vs_shader->current->shader.clip_dist_write));
r600_pipe_state_mod_reg(&rctx->vgt,
rctx->pa_cl_clip_cntl |
- (rctx->vs_shader->shader.clip_dist_write ||
- rctx->vs_shader->shader.vs_prohibit_ucps ?
+ (rctx->vs_shader->current->shader.clip_dist_write ||
+ rctx->vs_shader->current->shader.vs_prohibit_ucps ?
0 : rctx->rasterizer->clip_plane_enable & 0x3F));
r600_context_pipe_state_set(rctx, &rctx->vgt);