diff --git a/libs/vkd3d-shader/d3d_asm.c b/libs/vkd3d-shader/d3d_asm.c
index 2114b270..996ad845 100644
--- a/libs/vkd3d-shader/d3d_asm.c
+++ b/libs/vkd3d-shader/d3d_asm.c
@@ -344,6 +344,7 @@ static const char * const shader_opcode_names[] =
     [VKD3DSIH_WAVE_OP_MUL                     ] = "wave_op_mul",
     [VKD3DSIH_WAVE_OP_UMAX                    ] = "wave_op_umax",
     [VKD3DSIH_WAVE_OP_UMIN                    ] = "wave_op_umin",
+    [VKD3DSIH_WAVE_PREFIX_BIT_COUNT           ] = "wave_prefix_bit_count",
     [VKD3DSIH_XOR                             ] = "xor",
 };
 
diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index dd88bce8..811a7c97 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -459,6 +459,7 @@ enum dx_intrinsic_opcode
     DX_LEGACY_F32TOF16              = 130,
     DX_LEGACY_F16TOF32              = 131,
     DX_WAVE_ALL_BIT_COUNT           = 135,
+    DX_WAVE_PREFIX_BIT_COUNT        = 136,
     DX_RAW_BUFFER_LOAD              = 139,
     DX_RAW_BUFFER_STORE             = 140,
 };
@@ -4582,6 +4583,8 @@ static enum vkd3d_shader_opcode map_dx_unary_op(enum dx_intrinsic_opcode op)
             return VKD3DSIH_WAVE_ALL_TRUE;
         case DX_WAVE_ANY_TRUE:
             return VKD3DSIH_WAVE_ANY_TRUE;
+        case DX_WAVE_PREFIX_BIT_COUNT:
+            return VKD3DSIH_WAVE_PREFIX_BIT_COUNT;
         default:
             vkd3d_unreachable();
     }
@@ -6262,6 +6265,7 @@ static const struct sm6_dx_opcode_info sm6_dx_op_table[] =
     [DX_WAVE_GET_LANE_COUNT           ] = {"i", "",     sm6_parser_emit_dx_wave_builtin},
     [DX_WAVE_GET_LANE_INDEX           ] = {"i", "",     sm6_parser_emit_dx_wave_builtin},
     [DX_WAVE_IS_FIRST_LANE            ] = {"1", "",     sm6_parser_emit_dx_void},
+    [DX_WAVE_PREFIX_BIT_COUNT         ] = {"i", "1",    sm6_parser_emit_dx_unary},
     [DX_WAVE_PREFIX_OP                ] = {"n", "Rcc",  sm6_parser_emit_dx_wave_op},
 };
 
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index 1d4cbde8..073c4100 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -545,6 +545,7 @@ enum vkd3d_shader_opcode
     VKD3DSIH_WAVE_OP_MUL,
     VKD3DSIH_WAVE_OP_UMAX,
     VKD3DSIH_WAVE_OP_UMIN,
+    VKD3DSIH_WAVE_PREFIX_BIT_COUNT,
     VKD3DSIH_XOR,
 
     VKD3DSIH_INVALID,