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-rw-r--r--src/mesa/drivers/dri/i965/brw_eu_compact.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu_compact.c b/src/mesa/drivers/dri/i965/brw_eu_compact.c
index 7117890197a..8e33bcb0d83 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_compact.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_compact.c
@@ -75,6 +75,7 @@
#include "brw_context.h"
#include "brw_eu.h"
#include "intel_asm_annotation.h"
+#include "util/u_atomic.h" /* for p_atomic_cmpxchg */
static const uint32_t g45_control_index_table[32] = {
0b00000000000000000,
@@ -1247,6 +1248,10 @@ update_gen4_jump_count(struct brw_context *brw, brw_inst *insn,
void
brw_init_compaction_tables(struct brw_context *brw)
{
+ static bool initialized;
+ if (initialized || p_atomic_cmpxchg(&initialized, false, true) != false)
+ return;
+
assert(g45_control_index_table[ARRAY_SIZE(g45_control_index_table) - 1] != 0);
assert(g45_datatype_table[ARRAY_SIZE(g45_datatype_table) - 1] != 0);
assert(g45_subreg_table[ARRAY_SIZE(g45_subreg_table) - 1] != 0);