Mesa (master): gallium: add some more double opcodes to avoid unnecessary lowering

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 12dedca52303cf32ac06b8e40ff3cf07b58ed0bc
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=12dedca52303cf32ac06b8e40ff3cf07b58ed0bc

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Fri Jul 25 16:46:42 2014 -0400

gallium: add some more double opcodes to avoid unnecessary lowering

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Reviewed-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/auxiliary/tgsi/tgsi_info.c     |    5 ++++
 src/gallium/docs/source/tgsi.rst           |   39 ++++++++++++++++++++++++++++
 src/gallium/include/pipe/p_shader_tokens.h |    7 ++++-
 3 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_info.c b/src/gallium/auxiliary/tgsi/tgsi_info.c
index d04f9da..4d838fd 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_info.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_info.c
@@ -257,6 +257,11 @@ static const struct tgsi_opcode_info opcode_info[TGSI_OPCODE_LAST] =
    { 1, 1, 0, 0, 0, 0, COMP, "D2U", TGSI_OPCODE_D2U },
    { 1, 1, 0, 0, 0, 0, COMP, "U2D", TGSI_OPCODE_U2D },
    { 1, 1, 0, 0 ,0, 0, COMP, "DRSQ", TGSI_OPCODE_DRSQ },
+   { 1, 1, 0, 0, 0, 0, COMP, "DTRUNC", TGSI_OPCODE_DTRUNC },
+   { 1, 1, 0, 0, 0, 0, COMP, "DCEIL", TGSI_OPCODE_DCEIL },
+   { 1, 1, 0, 0, 0, 0, COMP, "DFLR", TGSI_OPCODE_DFLR },
+   { 1, 1, 0, 0, 0, 0, COMP, "DROUND", TGSI_OPCODE_DROUND },
+   { 1, 1, 0, 0, 0, 0, COMP, "DSSG", TGSI_OPCODE_DSSG },
 };
 
 const struct tgsi_opcode_info *
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index e20af79..b0a975a 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -1861,6 +1861,45 @@ two-component vectors with doubled precision in each component.
 
   dst.zw = src.zw - \lfloor src.zw\rfloor
 
+.. opcode:: DTRUNC - Truncate
+
+.. math::
+
+  dst.xy = trunc(src.xy)
+
+  dst.zw = trunc(src.zw)
+
+.. opcode:: DCEIL - Ceiling
+
+.. math::
+
+  dst.xy = \lceil src.xy\rceil
+
+  dst.zw = \lceil src.zw\rceil
+
+.. opcode:: DFLR - Floor
+
+.. math::
+
+  dst.xy = \lfloor src.xy\rfloor
+
+  dst.zw = \lfloor src.zw\rfloor
+
+.. opcode:: DROUND - Fraction
+
+.. math::
+
+  dst.xy = round(src.xy)
+
+  dst.zw = round(src.zw)
+
+.. opcode:: DSSG - Set Sign
+
+.. math::
+
+  dst.xy = (src.xy > 0) ? 1.0 : (src.xy < 0) ? -1.0 : 0.0
+
+  dst.zw = (src.zw > 0) ? 1.0 : (src.zw < 0) ? -1.0 : 0.0
 
 .. opcode:: DFRACEXP - Convert Number to Fractional and Integral Components
 
diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index fc41cc9..95ac590 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -519,7 +519,12 @@ struct tgsi_property_data {
 #define TGSI_OPCODE_D2U                 215
 #define TGSI_OPCODE_U2D                 216
 #define TGSI_OPCODE_DRSQ                217 /* eg, cayman also has DRSQ */
-#define TGSI_OPCODE_LAST                218
+#define TGSI_OPCODE_DTRUNC              218 /* nvc0 */
+#define TGSI_OPCODE_DCEIL               219 /* nvc0 */
+#define TGSI_OPCODE_DFLR                220 /* nvc0 */
+#define TGSI_OPCODE_DROUND              221 /* nvc0 */
+#define TGSI_OPCODE_DSSG                222
+#define TGSI_OPCODE_LAST                223
 
 #define TGSI_SAT_NONE            0  /* do not saturate */
 #define TGSI_SAT_ZERO_ONE        1  /* clamp to [0,1] */