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diff --git a/src/gallium/drivers/cell/spu/spu_ztest.h b/src/gallium/drivers/cell/spu/spu_ztest.h
new file mode 100644
index 0000000000..ce8ad00339
--- /dev/null
+++ b/src/gallium/drivers/cell/spu/spu_ztest.h
@@ -0,0 +1,135 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+
+/**
+ * Zbuffer/depth test code.
+ */
+
+
+#ifndef SPU_ZTEST_H
+#define SPU_ZTEST_H
+
+
+#ifdef __SPU__
+#include <spu_intrinsics.h>
+#endif
+
+
+
+/**
+ * Perform Z testing for a 16-bit/value Z buffer.
+ *
+ * \param zvals  vector of four fragment zvalues as floats
+ * \param zbuf   ptr to vector of ushort[8] zbuffer values.  Note that this
+ *               contains the Z values for 2 quads, 8 pixels.
+ * \param x      x coordinate of quad (only lsbit is significant)
+ * \param inMask indicates which fragments in the quad are alive
+ * \return new mask indicating which fragments are alive after ztest
+ */
+static INLINE vector unsigned int
+spu_z16_test_less(vector float zvals, vector unsigned short *zbuf,
+                  uint x, vector unsigned int inMask)
+{
+#define ZERO 0x80
+   vector unsigned int zvals_ui4, zbuf_ui4, mask;
+
+   /* convert floats to uints in [0, 65535] */
+   zvals_ui4 = spu_convtu(zvals, 32); /* convert to [0, 2^32] */
+   zvals_ui4 = spu_rlmask(zvals_ui4, -16);  /* right shift 16 */
+
+   /* XXX this conditional could be removed with a bit of work */
+   if (x & 1) {
+      /* convert zbuffer values from ushorts to uints */
+      /* gather lower four ushorts */
+      zbuf_ui4 = spu_shuffle((vector unsigned int) *zbuf,
+                             (vector unsigned int) *zbuf,
+                             ((vector unsigned char) {
+                                ZERO, ZERO,  8,  9, ZERO, ZERO, 10, 11,
+                                ZERO, ZERO, 12, 13, ZERO, ZERO, 14, 15}));
+      /* mask = (zbuf_ui4 < zvals_ui4) ? ~0 : 0 */
+      mask = spu_cmpgt(zbuf_ui4, zvals_ui4);
+      /* mask &= inMask */
+      mask = spu_and(mask, inMask);
+      /* zbuf = mask ? zval : zbuf */
+      zbuf_ui4 = spu_sel(zbuf_ui4, zvals_ui4, mask);
+      /* convert zbuffer values from uints back to ushorts, preserve lower 4 */
+      *zbuf = (vector unsigned short)
+         spu_shuffle(zbuf_ui4, (vector unsigned int) *zbuf,
+                     ((vector unsigned char) {
+                        16, 17, 18, 19, 20, 21, 22, 23,
+                        2, 3, 6, 7, 10, 11, 14, 15}));
+   }
+   else {
+      /* convert zbuffer values from ushorts to uints */
+      /* gather upper four ushorts */
+      zbuf_ui4 = spu_shuffle((vector unsigned int) *zbuf,
+                             (vector unsigned int) *zbuf,
+                             ((vector unsigned char) {
+                                ZERO, ZERO, 0, 1, ZERO, ZERO, 2, 3,
+                                ZERO, ZERO, 4, 5, ZERO, ZERO, 6, 7}));
+      /* mask = (zbuf_ui4 < zvals_ui4) ? ~0 : 0 */
+      mask = spu_cmpgt(zbuf_ui4, zvals_ui4);
+      /* mask &= inMask */
+      mask = spu_and(mask, inMask);
+      /* zbuf = mask ? zval : zbuf */
+      zbuf_ui4 = spu_sel(zbuf_ui4, zvals_ui4, mask);
+      /* convert zbuffer values from uints back to ushorts, preserve upper 4 */
+      *zbuf = (vector unsigned short)
+         spu_shuffle(zbuf_ui4, (vector unsigned int) *zbuf,
+                     ((vector unsigned char) {
+                        2, 3, 6, 7, 10, 11, 14, 15,
+                        24, 25, 26, 27, 28, 29, 30, 31}));
+   }
+   return mask;
+#undef ZERO
+}
+
+
+/**
+ * As above, but Zbuffer values as 32-bit uints
+ */
+static INLINE vector unsigned int
+spu_z32_test_less(vector float zvals, vector unsigned int *zbuf_ptr,
+                  vector unsigned int inMask)
+{
+   vector unsigned int zvals_ui4, mask, zbuf = *zbuf_ptr;
+
+   /* convert floats to uints in [0, 0xffffffff] */
+   zvals_ui4 = spu_convtu(zvals, 32);
+   /* mask = (zbuf < zvals_ui4) ? ~0 : 0 */
+   mask = spu_cmpgt(zbuf, zvals_ui4);
+   /* mask &= inMask */
+   mask = spu_and(mask, inMask);
+   /* zbuf = mask ? zval : zbuf */
+   *zbuf_ptr = spu_sel(zbuf, zvals_ui4, mask);
+
+   return mask;
+}
+
+
+#endif /* SPU_ZTEST_H */