i965: Extract can_change_source_types() functions.

Make them members of fs_inst/vec4_instruction for use elsewhere.

Also fix the fs version to check that dst.type == src[1].type and for
!saturate.

Reviewed-by: Jason Ekstrand <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index 00e2d63804e..befc92445d3 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -280,6 +280,18 @@ vec4_instruction::can_do_source_mods(const struct brw_device_info *devinfo)
    return true;
 }
 
+bool
+vec4_instruction::can_change_types() const
+{
+   return dst.type == src[0].type &&
+          !src[0].abs && !src[0].negate && !saturate &&
+          (opcode == BRW_OPCODE_MOV ||
+           (opcode == BRW_OPCODE_SEL &&
+            dst.type == src[1].type &&
+            predicate != BRW_PREDICATE_NONE &&
+            !src[1].abs && !src[1].negate));
+}
+
 /**
  * Returns how many MRFs an opcode will write over.
  *