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authorBas Nieuwenhuizen <bas@basnieuwenhuizen.nl>2016-05-26 14:09:43 +0200
committerBas Nieuwenhuizen <bas@basnieuwenhuizen.nl>2016-05-26 22:07:04 +0200
commitfd0a7a382f2accea67396584826f5f8e40239ef3 (patch)
tree6496b7e1c8a28ce4dc2cb7fd3139df9988df7394 /src/gallium
parentfee3160af9c8c9594e7d452cf3035b03a8f4153a (diff)
radeonsi: Add barrier before writing the tess factors.
The factors may be stored to LDs by another invocation than the invocation for vertex 0. Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/radeonsi/si_shader.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 166b2e8a415..5e5bf68df5f 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -144,6 +144,10 @@ static void si_init_shader_ctx(struct si_shader_context *ctx,
struct si_shader *shader,
LLVMTargetMachineRef tm);
+static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
+ struct lp_build_tgsi_context *bld_base,
+ struct lp_build_emit_data *emit_data);
+
/* Ideally pass the sample mask input to the PS epilog as v13, which
* is its usual location, so that the shader doesn't have to add v_mov.
*/
@@ -2534,6 +2538,8 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
unsigned stride, outer_comps, inner_comps, i;
struct lp_build_if_state if_ctx, inner_if_ctx;
+ si_llvm_emit_barrier(NULL, bld_base, NULL);
+
/* Do this only for invocation 0, because the tess levels are per-patch,
* not per-vertex.
*