Mesa (master): tgsi: add ISSG support

[Dave Airlie]

Module: Mesa
Branch: master
Commit: b6cbc28533a3fd68dbfe694c0774735233df8758
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b6cbc28533a3fd68dbfe694c0774735233df8758

Author: Dave Airlie <airlied at redhat.com>
Date:   Mon Jan  9 11:49:34 2012 +0000

tgsi: add ISSG support

This adds integer version of SSG that GLSL 1.30 can produce.

Signed-off-by: Dave Airlie <airlied at redhat.com>
Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/gallium/auxiliary/tgsi/tgsi_exec.c     |   14 ++++++++++++++
 src/gallium/auxiliary/tgsi/tgsi_info.c     |    1 +
 src/gallium/include/pipe/p_shader_tokens.h |    3 ++-
 3 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 3046656..72b1dca 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -375,6 +375,16 @@ micro_sgn(union tgsi_exec_channel *dst,
 }
 
 static void
+micro_isgn(union tgsi_exec_channel *dst,
+          const union tgsi_exec_channel *src)
+{
+   dst->i[0] = src->i[0] < 0 ? -1 : src->i[0] > 0 ? 1 : 0;
+   dst->i[1] = src->i[1] < 0 ? -1 : src->i[1] > 0 ? 1 : 0;
+   dst->i[2] = src->i[2] < 0 ? -1 : src->i[2] > 0 ? 1 : 0;
+   dst->i[3] = src->i[3] < 0 ? -1 : src->i[3] > 0 ? 1 : 0;
+}
+
+static void
 micro_sgt(union tgsi_exec_channel *dst,
           const union tgsi_exec_channel *src0,
           const union tgsi_exec_channel *src1)
@@ -4207,6 +4217,10 @@ exec_instruction(
       exec_vector_unary(mach, inst, micro_iabs, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
       break;
 
+   case TGSI_OPCODE_ISSG:
+      exec_vector_unary(mach, inst, micro_isgn, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
+      break;
+
    default:
       assert( 0 );
    }
diff --git a/src/gallium/auxiliary/tgsi/tgsi_info.c b/src/gallium/auxiliary/tgsi/tgsi_info.c
index c9acdb9..5b26d8f 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_info.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_info.c
@@ -193,6 +193,7 @@ static const struct tgsi_opcode_info opcode_info[TGSI_OPCODE_LAST] =
    { 1, 1, 0, 0, 0, 0, "UARL", TGSI_OPCODE_UARL },
    { 1, 3, 0, 0, 0, 0, "UCMP", TGSI_OPCODE_UCMP },
    { 1, 1, 0, 0, 0, 0, "IABS", TGSI_OPCODE_IABS },
+   { 1, 1, 0, 0, 0, 0, "ISSG", TGSI_OPCODE_ISSG },
 };
 
 const struct tgsi_opcode_info *
diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index cb1e698..a131630 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -379,8 +379,9 @@ struct tgsi_property_data {
 #define TGSI_OPCODE_UARL                157
 #define TGSI_OPCODE_UCMP                158
 #define TGSI_OPCODE_IABS                159
+#define TGSI_OPCODE_ISSG                160
 
-#define TGSI_OPCODE_LAST                160
+#define TGSI_OPCODE_LAST                161
 
 #define TGSI_SAT_NONE            0  /* do not saturate */
 #define TGSI_SAT_ZERO_ONE        1  /* clamp to [0,1] */