Mesa (intel-2008-q4): i965: implement OPCODE_TRUNC (round toward zero) on vertex path.

[Haihao Xiang]

Module: Mesa
Branch: intel-2008-q4
Commit: 2300dfd449b06744331c709f2d5856ec36102f26
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2300dfd449b06744331c709f2d5856ec36102f26

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Jan  5 10:09:28 2009 -0700

i965: implement OPCODE_TRUNC (round toward zero) on vertex path.

Also, fix some RNDD vs. RNDZ confusion elsewhere.
(cherry picked from commit 0d797365deb579cfeb2a32f21692515eb6904921)

---

 src/mesa/drivers/dri/i965/brw_eu.h      |    1 +
 src/mesa/drivers/dri/i965/brw_eu_emit.c |    1 +
 src/mesa/drivers/dri/i965/brw_vs_emit.c |    4 ++++
 src/mesa/drivers/dri/i965/brw_wm_glsl.c |    2 +-
 4 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_eu.h b/src/mesa/drivers/dri/i965/brw_eu.h
index 49b422e..d12f15e 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -733,6 +733,7 @@ ALU2(ADD)
 ALU2(MUL)
 ALU1(FRC)
 ALU1(RNDD)
+ALU1(RNDZ)
 ALU2(MAC)
 ALU2(MACH)
 ALU1(LZD)
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index ce4cf46..4e099b5 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -439,6 +439,7 @@ ALU2(ADD)
 ALU2(MUL)
 ALU1(FRC)
 ALU1(RNDD)
+ALU1(RNDZ)
 ALU2(MAC)
 ALU2(MACH)
 ALU1(LZD)
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index b594e47..aa3e46b 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -1146,6 +1146,10 @@ void brw_vs_emit(struct brw_vs_compile *c )
 	  */
 	 emit_swz(c, dst, inst->SrcReg[0] );
 	 break;
+      case OPCODE_TRUNC:
+         /* round toward zero */
+	 brw_RNDZ(p, dst, args[0]);
+	 break;
       case OPCODE_XPD:
 	 emit_xpd(p, dst, args[0], args[1]);
 	 break;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
index baecfdc..d43e326 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
@@ -267,7 +267,7 @@ static void emit_trunc( struct brw_wm_compile *c,
 	    struct brw_reg src, dst;
 	    dst = get_dst_reg(c, inst, i, 1) ;
 	    src = get_src_reg(c, &inst->SrcReg[0], i, 1);
-	    brw_RNDD(p, dst, src);
+	    brw_RNDZ(p, dst, src);
 	}
     }
     brw_set_saturate(p, 0);