[Mesa-dev] [PATCH 7/9] tgsi: implement micro_ilsb() and micro_ulsb()

[Maxence Le Doré]

From: Maxence Le Doré <Maxence Le Doré>

---
 src/gallium/auxiliary/tgsi/tgsi_exec.c | 42 ++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index ddff409..aa1b140 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -294,6 +294,40 @@ micro_lrp(union tgsi_exec_channel *dst,
 }
 
 static void
+micro_ilsb(union tgsi_exec_channel *dst,
+           const union tgsi_exec_channel *src)
+{
+   int i = 0, j = 0;
+
+   for(i = 0; i < 4; i++) {
+     int x = src->i[i];
+     int mask;
+     int res = -1;
+     for(j = 0; j < 32; j++) {
+       mask = 1 << j;
+       if (x & mask) {
+         res = j;
+         break;
+       }
+     }
+     dst->i[i] = res;
+   }
+}
+
+static void
+micro_ulsb(union tgsi_exec_channel *dst,
+           const union tgsi_exec_channel *src)
+{
+   int i = 0;
+   for(i = 0 ; i < 4 ; i++) {
+     if(src->u[i] == 0)
+       dst->i[i] = -1;
+     else
+       dst->i[i] = ffs(src->u[i]) - 1; /* see u_math.h */
+   }
+}
+
+static void
 micro_mad(union tgsi_exec_channel *dst,
           const union tgsi_exec_channel *src0,
           const union tgsi_exec_channel *src1,
@@ -4276,6 +4310,10 @@ exec_instruction(
       exec_vector_binary(mach, inst, micro_idiv, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
       break;
 
+   case TGSI_OPCODE_ILSB:
+      exec_vector_unary(mach, inst, micro_ilsb, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
+      break;
+
    case TGSI_OPCODE_IMAX:
       exec_vector_binary(mach, inst, micro_imax, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
       break;
@@ -4316,6 +4354,10 @@ exec_instruction(
       exec_vector_binary(mach, inst, micro_udiv, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
       break;
 
+   case TGSI_OPCODE_ULSB:
+      exec_vector_unary(mach, inst, micro_ulsb, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_UINT);
+      break;
+
    case TGSI_OPCODE_UMAD:
       exec_vector_trinary(mach, inst, micro_umad, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
       break;
-- 
1.8.5.2