Mesa (master): i965: Add LINTERP/CINTERP to can_do_cmod().

[Matt Turner]

Module: Mesa
Branch: master
Commit: d91390634ff8c50b217d55372db186d03996e9f7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d91390634ff8c50b217d55372db186d03996e9f7

Author: Matt Turner <mattst88 at gmail.com>
Date:   Fri Jan 23 21:58:51 2015 -0800

i965: Add LINTERP/CINTERP to can_do_cmod().

LINTERP is implemented as a PLN instruction or a LINE+MAC. PLN and MAC
can do conditional mod. CINTERP is just a MOV.

total instructions in shared programs: 5952103 -> 5950284 (-0.03%)
instructions in affected programs:     324573 -> 322754 (-0.56%)
helped:                                1819

We lose the SIMD16 in one Unigine Heaven shader which appears six times
in shader-db.

---

 src/mesa/drivers/dri/i965/brw_shader.cpp |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 3eea088..7fc4a84 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -905,6 +905,8 @@ backend_instruction::can_do_cmod() const
    case BRW_OPCODE_SHR:
    case BRW_OPCODE_SUBB:
    case BRW_OPCODE_XOR:
+   case FS_OPCODE_CINTERP:
+   case FS_OPCODE_LINTERP:
       return true;
    default:
       return false;