Mesa (master): i965: Add brw_reg constructors taking a dynamically determined vector width.

[Francisco Jerez]

Module: Mesa
Branch: master
Commit: d58bd7526326dfa59a9ee52f328ecd5539b8610b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d58bd7526326dfa59a9ee52f328ecd5539b8610b

Author: Francisco Jerez <currojerez at riseup.net>
Date:   Wed Sep 11 14:19:47 2013 -0700

i965: Add brw_reg constructors taking a dynamically determined vector width.

The MRF variant is going to be used extensively by the atomic counter
intrinsics to assemble untyped atomic and surface read messages
easily.

Reviewed-by: Paul Berry <stereotype441 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_reg.h |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_reg.h b/src/mesa/drivers/dri/i965/brw_reg.h
index 3ee3543..e9cf892 100644
--- a/src/mesa/drivers/dri/i965/brw_reg.h
+++ b/src/mesa/drivers/dri/i965/brw_reg.h
@@ -282,6 +282,24 @@ brw_vec1_reg(unsigned file, unsigned nr, unsigned subnr)
                   WRITEMASK_X);
 }
 
+static inline struct brw_reg
+brw_vecn_reg(unsigned width, unsigned file, unsigned nr, unsigned subnr)
+{
+   switch (width) {
+   case 1:
+      return brw_vec1_reg(file, nr, subnr);
+   case 2:
+      return brw_vec2_reg(file, nr, subnr);
+   case 4:
+      return brw_vec4_reg(file, nr, subnr);
+   case 8:
+      return brw_vec8_reg(file, nr, subnr);
+   case 16:
+      return brw_vec16_reg(file, nr, subnr);
+   default:
+      assert(!"Invalid register width");
+   }
+}
 
 static inline struct brw_reg
 retype(struct brw_reg reg, unsigned type)
@@ -570,6 +588,12 @@ brw_message_reg(unsigned nr)
    return brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, nr, 0);
 }
 
+static inline struct brw_reg
+brw_uvec_mrf(unsigned width, unsigned nr, unsigned subnr)
+{
+   return retype(brw_vecn_reg(width, BRW_MESSAGE_REGISTER_FILE, nr, subnr),
+                 BRW_REGISTER_TYPE_UD);
+}
 
 /* This is almost always called with a numeric constant argument, so
  * make things easy to evaluate at compile time: