[Mesa-dev] [PATCH 2/2] i965/vs: Enable workaround-free math on gen7.

[Eric Anholt]

This is similar to a commit that did the same for the FS.

Shaves several more instructions off of the VS in Lightsmark, but no
statistically significant performance difference (n=5).
---
 src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index 2436bc9..898e78d 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -313,7 +313,9 @@ vec4_visitor::emit_math(opcode opcode, dst_reg dst, src_reg src)
       return;
    }
 
-   if (intel->gen >= 6) {
+   if (intel->gen >= 7) {
+      emit(opcode, dst, src);
+   } else if (intel->gen == 6) {
       return emit_math1_gen6(opcode, dst, src);
    } else {
       return emit_math1_gen4(opcode, dst, src);
@@ -380,7 +382,9 @@ vec4_visitor::emit_math(enum opcode opcode,
       return;
    }
 
-   if (intel->gen >= 6) {
+   if (intel->gen >= 7) {
+      emit(opcode, dst, src0, src1);
+   } else if (intel->gen == 6) {
       return emit_math2_gen6(opcode, dst, src0, src1);
    } else {
       return emit_math2_gen4(opcode, dst, src0, src1);
-- 
1.7.7.3