i965/vs: Enable workaround-free math on gen7.

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).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index 2436bc9336a89537e50427f9ba395b37b6291c76..898e78dd6d5b020a0d1e61bb741910658425fb16 100644 (file)
--- 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);