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-rw-r--r--src/mesa/tnl/t_vb_arbprogram.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mesa/tnl/t_vb_arbprogram.c b/src/mesa/tnl/t_vb_arbprogram.c
index 14011f43db0..3212e00195a 100644
--- a/src/mesa/tnl/t_vb_arbprogram.c
+++ b/src/mesa/tnl/t_vb_arbprogram.c
@@ -790,6 +790,13 @@ static struct reg cvp_emit_arg( struct compilation *cp,
*/
rsw.dword = 0;
rsw.rsw.neg = src->Negate ? WRITEMASK_XYZW : 0;
+
+ /* we're expecting 2-bit swizzles below... */
+ ASSERT(GET_SWZ(src->Swizzle, 0) < 4);
+ ASSERT(GET_SWZ(src->Swizzle, 1) < 4);
+ ASSERT(GET_SWZ(src->Swizzle, 2) < 4);
+ ASSERT(GET_SWZ(src->Swizzle, 3) < 4);
+
rsw.rsw.swz = ((GET_SWZ(src->Swizzle, 0) << 0) |
(GET_SWZ(src->Swizzle, 1) << 2) |
(GET_SWZ(src->Swizzle, 2) << 4) |