tgsi: add ISSG support

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

Signed-off-by: Dave Airlie <[email protected]>
Reviewed-by: Brian Paul <[email protected]>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 3046656faeb..72b1dcab603 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 );
    }