[#56][fix] Fix workitem function(enqueued_local_size & local_linear_id) bugs in libclc

Support get_enqueued_local_size function and fix the calculation of get_local_linear_id

libclc/riscv32/lib/SOURCES

@@ -8,6 +8,7 @@ workitem/get_local_linear_id.cl
 workitem/get_local_size.cl
 workitem/get_num_groups.cl
 workitem/get_work_dim.cl
+workitem/get_enqueued_local_size.cl
 
 compiler-rt/nextafterf.cl
 compiler-rt/adddf3.cl

libclc/riscv32/lib/workitem/get_enqueued_local_size.cl

@@ -0,0 +1,7 @@
+#include <clc/clc.h>
+
+// get_global_size(unit dim) / get_num_groups(unit dim)
+
+_CLC_DEF _CLC_OVERLOAD size_t get_enqueued_local_size(uint dim) {
+  return get_local_size(dim);
+}

libclc/riscv32/lib/workitem/get_local_linear_id.cl

@@ -1,7 +1,17 @@
 #include <clc/clc.h>
 
-extern size_t __builtin_riscv_workitem_linear_id();
-
 _CLC_DEF _CLC_OVERLOAD size_t get_local_linear_id() {
-  return __builtin_riscv_workitem_linear_id();
+  uint dim = get_work_dim() - 1;
+  switch (dim) {
+  case 0:
+    return get_local_id(0);
+  case 1:
+    return get_local_id(1) * get_local_size(0) + get_local_id(0);
+  case 2:
+    return (get_local_id(2) * get_local_size(1) + get_local_id(1)) *
+               get_local_size(0) +
+           get_local_id(0);
+  default:
+    return 0;
+  }
 }

libclc/riscv32/lib/workitem/workitem.S

@@ -23,9 +23,9 @@
  *
  *
  * global_id (uniform methods in 1/2/3 dims):
- * get_global_id(0) = CSR_GID_X * local_size_x + local_id_x
- * get_global_id(1) = CSR_GID_Y * local_size_y + local_id_y
- * get_global_id(2) = CSR_GID_Z * local_size_z + local_id_z
+ * get_global_id(0) = _global_offset_x + CSR_GID_X * local_size_x + local_id_x
+ * get_global_id(1) = _global_offset_y + CSR_GID_Y * local_size_y + local_id_y
+ * get_global_id(2) = _global_offset_z + CSR_GID_Z * local_size_z + local_id_z
  *
  *
  * global_linear_id:
@@ -65,17 +65,6 @@ _local_id_z:
   .word 0
   // End workaround for pocl driver
 
-  .text
-  .global __builtin_riscv_workitem_linear_id
-  .type __builtin_riscv_workitem_linear_id, @function
-__builtin_riscv_workitem_linear_id:
-  csrr a0, CSR_KNL        # Get kernel metadata buffer
-  csrr t1, CSR_TID        # tid base offset for current warp
-  vid.v v2                # current thread offset
-  vadd.vx v0, v2, t1      # local_linear_id
-  ret
-
-
   .text
   .global __builtin_riscv_global_linear_id
   .type __builtin_riscv_global_linear_id, @function
@@ -145,16 +134,17 @@ __builtin_riscv_workgroup_id_z:
   .global __builtin_riscv_workitem_id_x
   .type __builtin_riscv_workitem_id_x, @function
 __builtin_riscv_workitem_id_x:
+  addi sp, sp, 4
+  sw ra, -4(sp)
   csrr a0, CSR_KNL        # Get kernel metadata buffer
   lw t0, KNL_WORK_DIM(a0) # Get work_dim
   csrr t1, CSR_TID        # tid base offset for current warp
   vid.v v2                # current thread offset
   vadd.vx v0, v2, t1      # local_id_x in 1 dim (local_linear_id)
-  li t2, 1
-  beq t0, t2, .WIXR
   lw t3, KNL_LC_SIZE_X(a0) # local_size_x
   vremu.vx v0, v0, t3      # local_id_x = local_liner_id % local_size_x
-.WIXR:
+  lw ra, -4(sp)    
+  addi sp, sp, -4
   ret
 
 
@@ -162,22 +152,20 @@ __builtin_riscv_workitem_id_x:
   .global __builtin_riscv_workitem_id_y
   .type __builtin_riscv_workitem_id_y, @function
 __builtin_riscv_workitem_id_y:
+  addi sp, sp, 4
+  sw ra, -4(sp)
   csrr a0, CSR_KNL        # Get kernel metadata buffer
   lw t0, KNL_WORK_DIM(a0) # Get work_dim
   csrr t1, CSR_TID        # tid base offset for current warp
   vid.v v2                # current thread offset
   vadd.vx v0, v2, t1      # local_linear_id
   lw t3, KNL_LC_SIZE_X(a0)  # local_size_x offset in 2 work_dims
-  li t2, 3
-  beq t0, t2, .WIY3
-.WIY2:                    # 2 dims
-  vdivu.vx v0, v0, t3     # local_id_y = local_liner_id / local_size_x
-  ret
-.WIY3:                    # 3 dims
-  lw t4, KNL_LC_SIZE_Y(a0) # local_size_y
+  lw t4, KNL_LC_SIZE_Y(a0)  # local_size_y offset in 2 work_dims
   mul t4, t4, t3          # local_size_x * local_size_y
   vremu.vx v0, v0, t4     # x = local_linear_id % (local_size_x * local_size_y)
   vdivu.vx v0, v0, t3     # x / local_size_x
+  lw ra, -4(sp)    
+  addi sp, sp, -4
   ret
 
 
@@ -185,6 +173,8 @@ __builtin_riscv_workitem_id_y:
   .global __builtin_riscv_workitem_id_z
   .type __builtin_riscv_workitem_id_z, @function
 __builtin_riscv_workitem_id_z:
+  addi sp, sp, 4
+  sw ra, -4(sp)
   csrr a0, CSR_KNL        # Get kernel metadata buffer
   csrr t1, CSR_TID        # tid base offset for current warp
   vid.v v2                # current thread offset
@@ -193,6 +183,8 @@ __builtin_riscv_workitem_id_z:
   lw t4, KNL_LC_SIZE_Y(a0) # local_size_y
   mul t4, t4, t3          # local_size_x * local_size_y
   vdivu.vx v0, v0, t4     # local_linear_id / (local_size_x * local_size_y)
+  lw ra, -4(sp)    
+  addi sp, sp, -4
 7:
   ret