---
src/mesa/drivers/dri/i965/brw_shader.cpp | 16 ++++++++++++++++
src/mesa/drivers/dri/i965/brw_shader.h | 1 +
2 files changed, 17 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp
b/src/mesa/drivers/dri/i965/brw_shader.cpp
index f194437..c8796b3 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -664,6 +664,22 @@ backend_instruction::can_do_saturate() const
}
bool
+backend_instruction::reads_accumulator_implicitly() const
+{
+ switch (opcode) {
+ case BRW_OPCODE_MAC:
+ case BRW_OPCODE_MACH:
+ /* FINISHME: Enable these if we ever start emitting them.
+ * case BRW_OPCODE_SADA:
+ * case BRW_OPCODE_SADA2:
+ */
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool
backend_instruction::has_side_effects() const
{
switch (opcode) {
diff --git a/src/mesa/drivers/dri/i965/brw_shader.h
b/src/mesa/drivers/dri/i965/brw_shader.h
index 6bd7dc8..9ef08e5 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.h
+++ b/src/mesa/drivers/dri/i965/brw_shader.h
@@ -47,6 +47,7 @@ public:
bool is_control_flow() const;
bool can_do_source_mods() const;
bool can_do_saturate() const;
+ bool reads_accumulator_implicitly() const;
/**
* True if the instruction has side effects other than writing to
--
1.8.3.2
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
