Mesa (gallium-0.1): gallium: added tgsi_set_exec_mask()

[Brian Paul]

Module: Mesa
Branch: gallium-0.1
Commit: 03c0ce4c61fd970509d605fe78166e828fc1df57
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=03c0ce4c61fd970509d605fe78166e828fc1df57

Author: Brian Paul <brian.paul at tungstengraphics.com>
Date:   Wed Nov  5 13:56:20 2008 -0700

gallium: added tgsi_set_exec_mask()

---

 src/gallium/auxiliary/tgsi/tgsi_exec.h |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index c4e649e..fc40a25 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -165,6 +165,10 @@ struct tgsi_exec_labels
 #define TGSI_EXEC_TEMP_HALF_I       (TGSI_EXEC_NUM_TEMPS + 3)
 #define TGSI_EXEC_TEMP_HALF_C       1
 
+/* execution mask, each value is either 0 or ~0 */
+#define TGSI_EXEC_MASK_I            (TGSI_EXEC_NUM_TEMPS + 3)
+#define TGSI_EXEC_MASK_C            2
+
 #define TGSI_EXEC_TEMP_R0           (TGSI_EXEC_NUM_TEMPS + 4)
 
 #define TGSI_EXEC_TEMP_ADDR         (TGSI_EXEC_NUM_TEMPS + 5)
@@ -265,6 +269,27 @@ void
 tgsi_exec_machine_free_data(struct tgsi_exec_machine *mach);
 
 
+static INLINE void
+tgsi_set_kill_mask(struct tgsi_exec_machine *mach, unsigned mask)
+{
+   mach->Temps[TGSI_EXEC_TEMP_KILMASK_I].xyzw[TGSI_EXEC_TEMP_KILMASK_C].u[0] =
+      mask;
+}
+
+
+/** Set execution mask values prior to executing the shader */
+static INLINE void
+tgsi_set_exec_mask(struct tgsi_exec_machine *mach,
+                   boolean ch0, boolean ch1, boolean ch2, boolean ch3)
+{
+   int *mask = mach->Temps[TGSI_EXEC_MASK_I].xyzw[TGSI_EXEC_MASK_C].i;
+   mask[0] = ch0 ? ~0 : 0;
+   mask[1] = ch1 ? ~0 : 0;
+   mask[2] = ch2 ? ~0 : 0;
+   mask[3] = ch3 ? ~0 : 0;
+}
+
+
 #if defined __cplusplus
 } /* extern "C" */
 #endif