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Diffstat (limited to 'src/mesa/tnl/t_pipeline.c')
-rw-r--r--src/mesa/tnl/t_pipeline.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mesa/tnl/t_pipeline.c b/src/mesa/tnl/t_pipeline.c
index 18f095f0d4b..881d5d5f535 100644
--- a/src/mesa/tnl/t_pipeline.c
+++ b/src/mesa/tnl/t_pipeline.c
@@ -146,7 +146,17 @@ void _tnl_run_pipeline( struct gl_context *ctx )
_tnl_notify_pipeline_output_change( ctx );
}
+#ifndef _OPENMP
+ /* Don't adjust FPU precision mode in case multiple threads are to be used.
+ * This would require that the additional threads also changed the FPU mode
+ * which is quite a mess as this had to be done in all parallelized sections;
+ * otherwise the master thread and all other threads are running in different
+ * modes, producing inconsistent results.
+ * Note that all x64 implementations don't define/use START_FAST_MATH, so
+ * this is "hack" is only used in i386 mode
+ */
START_FAST_MATH(__tmp);
+#endif
for (i = 0; i < tnl->pipeline.nr_stages ; i++) {
struct tnl_pipeline_stage *s = &tnl->pipeline.stages[i];
@@ -154,7 +164,9 @@ void _tnl_run_pipeline( struct gl_context *ctx )
break;
}
+#ifndef _OPENMP
END_FAST_MATH(__tmp);
+#endif
}