[Mesa-dev] [PATCH v4 32/40] intel/compiler: skip MAD algebraic optimization for half-float or mixed mode

[Iago Toral Quiroga]

It is very likely that this optimzation is never useful and we'll probably
just end up removing it, so let's not bother adding more cases to it for
now.
---
 src/intel/compiler/brw_fs.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index 873a1dd8196..aeabaefd6df 100644
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -2655,6 +2655,10 @@ fs_visitor::opt_algebraic()
          }
          break;
       case BRW_OPCODE_MAD:
+         if (inst->src[0].type != BRW_REGISTER_TYPE_F ||
+             inst->src[1].type != BRW_REGISTER_TYPE_F ||
+             inst->src[2].type != BRW_REGISTER_TYPE_F)
+            break;
          if (inst->src[1].is_one()) {
             inst->opcode = BRW_OPCODE_ADD;
             inst->src[1] = inst->src[2];
-- 
2.17.1