Mesa (gallium-0.2): draw: Implement TGSI_OPCODE_TRUNC.

[Alan Hourihane]

Module: Mesa
Branch: gallium-0.2
Commit: 7115b79b77e541f3eb81db00f6f0c34a0f224feb
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7115b79b77e541f3eb81db00f6f0c34a0f224feb

Author: michal <michal at quad.(none)>
Date:   Wed Nov  5 11:58:11 2008 +0100

draw: Implement TGSI_OPCODE_TRUNC.

---

 src/gallium/auxiliary/draw/draw_vs_aos.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/draw/draw_vs_aos.c b/src/gallium/auxiliary/draw/draw_vs_aos.c
index 8723286..a688068 100644
--- a/src/gallium/auxiliary/draw/draw_vs_aos.c
+++ b/src/gallium/auxiliary/draw/draw_vs_aos.c
@@ -1632,6 +1632,17 @@ static boolean emit_SUB( struct aos_compilation *cp, const struct tgsi_full_inst
    return TRUE;
 }
 
+static boolean emit_TRUNC( struct aos_compilation *cp, const struct tgsi_full_instruction *op )
+{
+   struct x86_reg arg0 = fetch_src(cp, &op->FullSrcRegisters[0]);
+   struct x86_reg tmp0 = aos_get_xmm_reg(cp);
+
+   sse2_cvttps2dq(cp->func, tmp0, arg0);
+   sse2_cvtdq2ps(cp->func, tmp0, tmp0);
+
+   store_dest(cp, &op->FullDstRegisters[0], tmp0);
+   return TRUE;
+}
 
 static boolean emit_XPD( struct aos_compilation *cp, const struct tgsi_full_instruction *op ) 
 {
@@ -1770,6 +1781,9 @@ emit_instruction( struct aos_compilation *cp,
    case TGSI_OPCODE_SIN:
       return emit_SIN(cp, inst);
 
+   case TGSI_OPCODE_TRUNC:
+      return emit_TRUNC(cp, inst);
+
    case TGSI_OPCODE_END:
       return TRUE;