Mesa (master): i965: Support OPCODE_TRUNC in the brw_wm_fp.c code.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 0ab8e2622e932593f39e5a634808567322bd669b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0ab8e2622e932593f39e5a634808567322bd669b

Author: Eric Anholt <eric at anholt.net>
Date:   Thu May 28 10:34:08 2009 -0700

i965: Support OPCODE_TRUNC in the brw_wm_fp.c code.

This gets two more glean glsl1 tests using the non-GLSL path.

---

 src/mesa/drivers/dri/i965/brw_wm_emit.c  |   17 +++++++++++++++++
 src/mesa/drivers/dri/i965/brw_wm_glsl.c  |    1 -
 src/mesa/drivers/dri/i965/brw_wm_pass1.c |    1 +
 3 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 72fc21d..14ab904 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -353,6 +353,19 @@ static void emit_mad( struct brw_compile *p,
    }
 }
 
+static void emit_trunc( struct brw_compile *p,
+		      const struct brw_reg *dst,
+		      GLuint mask,
+		      const struct brw_reg *arg0)
+{
+   GLuint i;
+
+   for (i = 0; i < 4; i++) {
+      if (mask & (1<<i)) {
+	 brw_RNDZ(p, dst[i], arg0[i]);
+      }
+   }
+}
 
 static void emit_lrp( struct brw_compile *p, 
 		      const struct brw_reg *dst,
@@ -1224,6 +1237,10 @@ void brw_wm_emit( struct brw_wm_compile *c )
 	 emit_dph(p, dst, dst_flags, args[0], args[1]);
 	 break;
 
+      case OPCODE_TRUNC:
+	 emit_trunc(p, dst, dst_flags, args[0]);
+	 break;
+
       case OPCODE_LRP:
 	 emit_lrp(p, dst, dst_flags, args[0], args[1], args[2]);
 	 break;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
index 4936703..0e6a2f8 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
@@ -23,7 +23,6 @@ GLboolean brw_wm_is_glsl(const struct gl_fragment_program *fp)
 	const struct prog_instruction *inst = &fp->Base.Instructions[i];
 	switch (inst->Opcode) {
 	    case OPCODE_IF:
-	    case OPCODE_TRUNC:
 	    case OPCODE_ENDIF:
 	    case OPCODE_CAL:
 	    case OPCODE_BRK:
diff --git a/src/mesa/drivers/dri/i965/brw_wm_pass1.c b/src/mesa/drivers/dri/i965/brw_wm_pass1.c
index ab9aa2f..3436a24 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_pass1.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_pass1.c
@@ -159,6 +159,7 @@ void brw_wm_pass1( struct brw_wm_compile *c )
       case OPCODE_FRC:
       case OPCODE_MOV:
       case OPCODE_SWZ:
+      case OPCODE_TRUNC:
 	 read0 = writemask;
 	 break;