Mesa (master): i965: Add support for math instructions in the gen6 WM.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 881ec3a81455f8449d06429811107e1f955f2c60
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=881ec3a81455f8449d06429811107e1f955f2c60

Author: Zhenyu Wang <zhenyuw at linux.intel.com>
Date:   Sat Jun 12 21:30:20 2010 -0700

i965: Add support for math instructions in the gen6 WM.

---

 src/mesa/drivers/dri/i965/brw_eu_emit.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 175899b..34490b7 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -966,10 +966,25 @@ void brw_math_16( struct brw_compile *p,
 		  struct brw_reg src,
 		  GLuint precision )
 {
+   struct intel_context *intel = &p->brw->intel;
    struct brw_instruction *insn;
    GLuint msg_length = (function == BRW_MATH_FUNCTION_POW) ? 2 : 1; 
    GLuint response_length = (function == BRW_MATH_FUNCTION_SINCOS) ? 2 : 1; 
 
+   if (intel->gen >= 6) {
+      insn = next_insn(p, BRW_OPCODE_MATH);
+
+      /* Math is the same ISA format as other opcodes, except that CondModifier
+       * becomes FC[3:0] and ThreadCtrl becomes FC[5:4].
+       */
+      insn->header.destreg__conditionalmod = function;
+
+      brw_set_dest(insn, dest);
+      brw_set_src0(insn, src);
+      brw_set_src1(insn, brw_null_reg());
+      return;
+   }
+
    /* First instruction:
     */
    brw_push_insn_state(p);