r300/compiler: Implement simple loop emulation

The loop emulation unrolls loops as may times as possbile while still
keeping the shader program below the maximum instruction limit.  At this
point, there are no checks for constant conditionals.  This is only enabled
for fragment shaders.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.h b/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.h
new file mode 100644
index 0000000000..ddcf1c0fab
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_emulate_loops.h
@@ -0,0 +1,12 @@
+
+
+#ifndef RADEON_EMULATE_LOOPS_H
+#define RADEON_EMULATE_LOOPS_H
+
+#define MAX_ITERATIONS 8
+
+struct radeon_compiler;
+
+void rc_emulate_loops(struct radeon_compiler *c, unsigned int max_instructions);
+
+#endif /* RADEON_EMULATE_LOOPS_H */