acpica: Import ACPICA 20201217.

(cherry picked from commit a4634ed7779f0905e3bfeb781e58d40a5bdf9bb7)

29 files changed, 95 insertions, 40 deletions

diff --git a/sys/contrib/dev/acpica/changes.txt b/sys/contrib/dev/acpica/changes.txt
index e7cc572a0cc3..d27547d31b76 100644
--- a/sys/contrib/dev/acpica/changes.txt
+++ b/sys/contrib/dev/acpica/changes.txt
@@ -1,5 +1,40 @@
 ----------------------------------------
+17 December 2020. Summary of changes for version 20201217:
 
+This release is available at https://acpica.org/downloads
+
+
+1) ACPICA kernel-resident subsystem:
+
+Note: The implementation of ACPI 6.4 is underway, and is expected to be 
+mostly finished next month, when ACPI 6.4 is released.
+
+From qzed:- fixed-ae-class-macros. Fix exception code class checks. Added 
+several new macros, such as ACPI_CNTL_EXCEPTION(Status) in order to 
+enable this.
+
+AcpiExec/iASL/AcpiHelp: Added a few changes for support of GCC 10.2.0. 
+These included a few casts, as well as a null pointer check.
+
+Fix -Wfallthrough: GCC 7.1 gained -Wimplicit-fallthrough to warn on 
+implicit fallthrough, as well as __attribute__((__fallthrough__)) and 
+comments to explicitly denote that cases of fallthrough were intentional. 
+Clang also supports this warning and statement attribute, but not the 
+comment form. Added a new macro, ACPI_FALLTHROUGH to support this feature 
+of GCC. With assistance from @nickdesaulniers. 
+
+2) iASL Compiler/Disassembler and ACPICA tools: 
+
+Added improvement to method call analysis by saving the return type and 
+relaxing certain cases of type checking.
+
+iASL Table Compiler: Improved info messages. Added a message to the -T 
+option for when the default template (DSDT) is used.
+Also added a note for when multiple SSDTs are created with a DSDT that 
+the SSDTs are created in the same file as the DSDT.
+
+
+----------------------------------------
 
 13 November 2020. Summary of changes for version 20201113:
 
diff --git a/sys/contrib/dev/acpica/compiler/aslanalyze.c b/sys/contrib/dev/acpica/compiler/aslanalyze.c
index df37dac214ab..fe1f2f8cd410 100644
--- a/sys/contrib/dev/acpica/compiler/aslanalyze.c
+++ b/sys/contrib/dev/acpica/compiler/aslanalyze.c
@@ -470,7 +470,7 @@ AnCheckMethodReturnValue (
                 "Method returns [%s], %s operator requires [%s]",
                 AslGbl_StringBuffer, OpInfo->Name, AslGbl_StringBuffer2);
 
-            AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, AslGbl_MsgBuffer);
+            AslError (ASL_WARNING, ASL_MSG_INVALID_TYPE, ArgOp, AslGbl_MsgBuffer);
         }
     }
 
diff --git a/sys/contrib/dev/acpica/compiler/aslcompiler.l b/sys/contrib/dev/acpica/compiler/aslcompiler.l
index 524dd0a67ff5..3127447710a5 100644
--- a/sys/contrib/dev/acpica/compiler/aslcompiler.l
+++ b/sys/contrib/dev/acpica/compiler/aslcompiler.l
@@ -812,9 +812,9 @@ NamePathTail                [.]{NameSeg}
 "__PATH__"                  { count (0); return (PARSEOP___PATH__); }
 "__METHOD__"                { count (0); return (PARSEOP___METHOD__); }
 "__EXPECT__"{ErrorCode}     { char *s;
-                                int index = 0;
+                                unsigned int index = 0;
                                 count (0);
-                                while (!isdigit (AslCompilertext[index]))
+                                while (!isdigit ((int) AslCompilertext[index]))
                                 {
                                     index++;
                                 }
diff --git a/sys/contrib/dev/acpica/compiler/aslerror.c b/sys/contrib/dev/acpica/compiler/aslerror.c
index 924e8d715712..48ac99ef62c2 100644
--- a/sys/contrib/dev/acpica/compiler/aslerror.c
+++ b/sys/contrib/dev/acpica/compiler/aslerror.c
@@ -1456,7 +1456,7 @@ AslIsExceptionDisabled (
         {
             return (TRUE);
         }
-        /* Fall through */
+        ACPI_FALLTHROUGH;
 
     case ASL_WARNING:
     case ASL_REMARK:
diff --git a/sys/contrib/dev/acpica/compiler/aslmethod.c b/sys/contrib/dev/acpica/compiler/aslmethod.c
index 859e0d8e69ac..e474b957074d 100644
--- a/sys/contrib/dev/acpica/compiler/aslmethod.c
+++ b/sys/contrib/dev/acpica/compiler/aslmethod.c
@@ -288,6 +288,7 @@ MtMethodAnalysisWalkBegin (
         NextType = Next->Asl.Child;
 
         MethodInfo->ValidReturnTypes = MtProcessTypeOp (NextType);
+        Op->Asl.AcpiBtype |= MethodInfo->ValidReturnTypes;
 
         /* Get the ParameterType node */
 
diff --git a/sys/contrib/dev/acpica/compiler/aslparseop.c b/sys/contrib/dev/acpica/compiler/aslparseop.c
index c3b9630a53fe..e21f91509aa4 100644
--- a/sys/contrib/dev/acpica/compiler/aslparseop.c
+++ b/sys/contrib/dev/acpica/compiler/aslparseop.c
@@ -414,7 +414,7 @@ TrCreateValuedLeafOp (
 
         for (i = 0; i < ACPI_NAMESEG_SIZE; i++)
         {
-            if (islower (Op->Asl.Value.Name[i]))
+            if (islower ((int) Op->Asl.Value.Name[i]))
             {
                 AcpiUtStrupr (&Op->Asl.Value.Name[i]);
                 AslError (ASL_REMARK, ASL_MSG_LOWER_CASE_NAMESEG, Op, Op->Asl.Value.Name);
@@ -431,7 +431,7 @@ TrCreateValuedLeafOp (
         StringPtr = Op->Asl.Value.Name;
         for (i = 0; *StringPtr; i++)
         {
-            if (islower (*StringPtr))
+            if (islower ((int) *StringPtr))
             {
                 AcpiUtStrupr (&Op->Asl.Value.Name[i]);
                 AslError (ASL_REMARK, ASL_MSG_LOWER_CASE_NAMEPATH, Op, Op->Asl.Value.Name);
diff --git a/sys/contrib/dev/acpica/compiler/aslwalks.c b/sys/contrib/dev/acpica/compiler/aslwalks.c
index 09bf205f5f8d..902a1700718b 100644
--- a/sys/contrib/dev/acpica/compiler/aslwalks.c
+++ b/sys/contrib/dev/acpica/compiler/aslwalks.c
@@ -516,7 +516,7 @@ AnOperandTypecheckWalkEnd (
                     break;
                 }
 
-            /* Fallthrough */
+                ACPI_FALLTHROUGH;
 
             case ARGI_STORE_TARGET:
 
diff --git a/sys/contrib/dev/acpica/compiler/dtfield.c b/sys/contrib/dev/acpica/compiler/dtfield.c
index ab9f7903f033..b81f77edf733 100644
--- a/sys/contrib/dev/acpica/compiler/dtfield.c
+++ b/sys/contrib/dev/acpica/compiler/dtfield.c
@@ -227,7 +227,7 @@ DtCompileOneField (
             break;
         }
 
-        /* Fall through. */
+        ACPI_FALLTHROUGH;
 
     case DT_FIELD_TYPE_BUFFER:
 
diff --git a/sys/contrib/dev/acpica/compiler/dttemplate.c b/sys/contrib/dev/acpica/compiler/dttemplate.c
index 1beb67ac3b34..ad15f6e74bf0 100644
--- a/sys/contrib/dev/acpica/compiler/dttemplate.c
+++ b/sys/contrib/dev/acpica/compiler/dttemplate.c
@@ -255,6 +255,7 @@ DtCreateTemplates (
 
     if (AcpiGbl_Optind < 3)
     {
+        fprintf (stderr, "Creating default template: [DSDT]\n");
         Status = DtCreateOneTemplateFile (ACPI_SIG_DSDT, 0);
         goto Exit;
     }
@@ -640,7 +641,7 @@ DtCreateOneTemplate (
     {
         fprintf (stderr,
             "Created ACPI table templates for [%4.4s] "
-            "and %u [SSDT], written to \"%s\"\n",
+            "and %u [SSDT] in same file, written to \"%s\"\n",
             Signature, TableCount, DisasmFilename);
     }
 
diff --git a/sys/contrib/dev/acpica/components/debugger/dbinput.c b/sys/contrib/dev/acpica/components/debugger/dbinput.c
index 50463d06d461..76a3aa112299 100644
--- a/sys/contrib/dev/acpica/components/debugger/dbinput.c
+++ b/sys/contrib/dev/acpica/components/debugger/dbinput.c
@@ -642,7 +642,7 @@ AcpiDbGetNextToken (
 
     /* Remove any spaces at the beginning, ignore blank lines */
 
-    while (*String && isspace (*String))
+    while (*String && isspace ((int) *String))
     {
         String++;
     }
@@ -754,7 +754,7 @@ AcpiDbGetNextToken (
 
         /* Find end of token */
 
-        while (*String && !isspace (*String))
+        while (*String && !isspace ((int) *String))
         {
             String++;
         }
diff --git a/sys/contrib/dev/acpica/components/debugger/dbobject.c b/sys/contrib/dev/acpica/components/debugger/dbobject.c
index f6bca7ea65b1..eb38f1315e73 100644
--- a/sys/contrib/dev/acpica/components/debugger/dbobject.c
+++ b/sys/contrib/dev/acpica/components/debugger/dbobject.c
@@ -201,7 +201,7 @@ AcpiDbDumpMethodInfo (
 
     /* Ignore control codes, they are not errors */
 
-    if ((Status & AE_CODE_MASK) == AE_CODE_CONTROL)
+    if (ACPI_CNTL_EXCEPTION (Status))
     {
         return;
     }
diff --git a/sys/contrib/dev/acpica/components/disassembler/dmwalk.c b/sys/contrib/dev/acpica/components/disassembler/dmwalk.c
index 88658cfac8f8..5c41c5a2e308 100644
--- a/sys/contrib/dev/acpica/components/disassembler/dmwalk.c
+++ b/sys/contrib/dev/acpica/components/disassembler/dmwalk.c
@@ -400,7 +400,7 @@ AcpiDmBlockType (
             return (BLOCK_NONE);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case AML_PACKAGE_OP:
     case AML_VARIABLE_PACKAGE_OP:
@@ -422,7 +422,7 @@ AcpiDmBlockType (
             return (BLOCK_NONE);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     default:
 
@@ -688,7 +688,7 @@ AcpiDmDescendingOp (
                 return (AE_OK);
             }
 
-            /* Fallthrough */
+            ACPI_FALLTHROUGH;
 
         default:
 
@@ -772,7 +772,7 @@ AcpiDmDescendingOp (
                 AcpiDmNamestring (NextOp->Common.Value.Name);
                 AcpiOsPrintf (", ");
 
-                /*lint -fallthrough */
+                ACPI_FALLTHROUGH;
 
             default:
 
diff --git a/sys/contrib/dev/acpica/components/dispatcher/dscontrol.c b/sys/contrib/dev/acpica/components/dispatcher/dscontrol.c
index 5452cc8e763b..22821f258ce3 100644
--- a/sys/contrib/dev/acpica/components/dispatcher/dscontrol.c
+++ b/sys/contrib/dev/acpica/components/dispatcher/dscontrol.c
@@ -210,7 +210,7 @@ AcpiDsExecBeginControlOp (
             }
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case AML_IF_OP:
         /*
diff --git a/sys/contrib/dev/acpica/components/dispatcher/dsdebug.c b/sys/contrib/dev/acpica/components/dispatcher/dsdebug.c
index 42566e7ce7cf..33ed97ce8f87 100644
--- a/sys/contrib/dev/acpica/components/dispatcher/dsdebug.c
+++ b/sys/contrib/dev/acpica/components/dispatcher/dsdebug.c
@@ -254,7 +254,7 @@ AcpiDsDumpMethodStack (
 
     /* Ignore control codes, they are not errors */
 
-    if ((Status & AE_CODE_MASK) == AE_CODE_CONTROL)
+    if (ACPI_CNTL_EXCEPTION (Status))
     {
         return_VOID;
     }
diff --git a/sys/contrib/dev/acpica/components/dispatcher/dswexec.c b/sys/contrib/dev/acpica/components/dispatcher/dswexec.c
index 267cca7e6507..329e29749046 100644
--- a/sys/contrib/dev/acpica/components/dispatcher/dswexec.c
+++ b/sys/contrib/dev/acpica/components/dispatcher/dswexec.c
@@ -772,8 +772,7 @@ AcpiDsExecEndOp (
                     break;
                 }
 
-                /* Fall through */
-                /*lint -fallthrough */
+                ACPI_FALLTHROUGH;
 
             case AML_INT_EVAL_SUBTREE_OP:
 
diff --git a/sys/contrib/dev/acpica/components/dispatcher/dswload.c b/sys/contrib/dev/acpica/components/dispatcher/dswload.c
index 02b215aff735..0bd36d81c623 100644
--- a/sys/contrib/dev/acpica/components/dispatcher/dswload.c
+++ b/sys/contrib/dev/acpica/components/dispatcher/dswload.c
@@ -375,7 +375,7 @@ AcpiDsLoad1BeginOp (
                 break;
             }
 
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         default:
 
diff --git a/sys/contrib/dev/acpica/components/dispatcher/dswload2.c b/sys/contrib/dev/acpica/components/dispatcher/dswload2.c
index e47f0c23d47a..7c1994296459 100644
--- a/sys/contrib/dev/acpica/components/dispatcher/dswload2.c
+++ b/sys/contrib/dev/acpica/components/dispatcher/dswload2.c
@@ -366,7 +366,7 @@ AcpiDsLoad2BeginOp (
                 break;
             }
 
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         default:
 
diff --git a/sys/contrib/dev/acpica/components/executer/exfldio.c b/sys/contrib/dev/acpica/components/executer/exfldio.c
index 3f9407e80f09..7ca430b267a2 100644
--- a/sys/contrib/dev/acpica/components/executer/exfldio.c
+++ b/sys/contrib/dev/acpica/components/executer/exfldio.c
@@ -616,7 +616,7 @@ AcpiExFieldDatumIo (
          * RegionField case and write the datum to the Operation Region
          */
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_TYPE_LOCAL_REGION_FIELD:
         /*
diff --git a/sys/contrib/dev/acpica/components/executer/exresop.c b/sys/contrib/dev/acpica/components/executer/exresop.c
index ad9f0132ee05..4ed21ab6aec0 100644
--- a/sys/contrib/dev/acpica/components/executer/exresop.c
+++ b/sys/contrib/dev/acpica/components/executer/exresop.c
@@ -358,7 +358,7 @@ AcpiExResolveOperands (
 
                     TargetOp = AML_DEBUG_OP;
 
-                    /*lint -fallthrough */
+                    ACPI_FALLTHROUGH;
 
                 case ACPI_REFCLASS_ARG:
                 case ACPI_REFCLASS_LOCAL:
@@ -422,7 +422,7 @@ AcpiExResolveOperands (
              * Else not a string - fall through to the normal Reference
              * case below
              */
-            /*lint -fallthrough */
+            ACPI_FALLTHROUGH;
 
         case ARGI_REFERENCE:            /* References: */
         case ARGI_INTEGER_REF:
diff --git a/sys/contrib/dev/acpica/components/executer/exstore.c b/sys/contrib/dev/acpica/components/executer/exstore.c
index f90b702627af..067ee8b9e4bb 100644
--- a/sys/contrib/dev/acpica/components/executer/exstore.c
+++ b/sys/contrib/dev/acpica/components/executer/exstore.c
@@ -248,7 +248,7 @@ AcpiExStore (
             return_ACPI_STATUS (AE_OK);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     default:
 
@@ -585,7 +585,7 @@ AcpiExStoreObjectToNode (
                 break;
             }
 
-        /* Fallthrough */
+            ACPI_FALLTHROUGH;
 
         case ACPI_TYPE_DEVICE:
         case ACPI_TYPE_EVENT:
diff --git a/sys/contrib/dev/acpica/components/hardware/hwgpe.c b/sys/contrib/dev/acpica/components/hardware/hwgpe.c
index 8d8ab0a11211..f645396b136d 100644
--- a/sys/contrib/dev/acpica/components/hardware/hwgpe.c
+++ b/sys/contrib/dev/acpica/components/hardware/hwgpe.c
@@ -254,7 +254,7 @@ AcpiHwLowSetGpe (
             return (AE_BAD_PARAMETER);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_GPE_ENABLE:
 
diff --git a/sys/contrib/dev/acpica/components/parser/psloop.c b/sys/contrib/dev/acpica/components/parser/psloop.c
index 781575cfaf7a..2d56407c5bcf 100644
--- a/sys/contrib/dev/acpica/components/parser/psloop.c
+++ b/sys/contrib/dev/acpica/components/parser/psloop.c
@@ -410,8 +410,7 @@ AcpiPsParseLoop (
                  */
                 WalkState->Op = NULL;
                 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE));
-                if (ACPI_FAILURE (Status) &&
-                    ((Status & AE_CODE_MASK) != AE_CODE_CONTROL))
+                if (ACPI_FAILURE (Status) && !ACPI_CNTL_EXCEPTION (Status))
                 {
                     if (Status == AE_AML_NO_RETURN_VALUE)
                     {
diff --git a/sys/contrib/dev/acpica/components/parser/psparse.c b/sys/contrib/dev/acpica/components/parser/psparse.c
index 75ec3dca1aad..41a8e4626287 100644
--- a/sys/contrib/dev/acpica/components/parser/psparse.c
+++ b/sys/contrib/dev/acpica/components/parser/psparse.c
@@ -533,7 +533,7 @@ AcpiPsNextParseState (
     default:
 
         Status = CallbackStatus;
-        if ((CallbackStatus & AE_CODE_MASK) == AE_CODE_CONTROL)
+        if (ACPI_CNTL_EXCEPTION (CallbackStatus))
         {
             Status = AE_OK;
         }
diff --git a/sys/contrib/dev/acpica/components/utilities/utdelete.c b/sys/contrib/dev/acpica/components/utilities/utdelete.c
index 032bf9fae7bf..8ce9196343ca 100644
--- a/sys/contrib/dev/acpica/components/utilities/utdelete.c
+++ b/sys/contrib/dev/acpica/components/utilities/utdelete.c
@@ -266,7 +266,7 @@ AcpiUtDeleteInternalObj (
             (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
         }
 
-        /*lint -fallthrough */
+        ACPI_FALLTHROUGH;
 
     case ACPI_TYPE_PROCESSOR:
     case ACPI_TYPE_THERMAL:
diff --git a/sys/contrib/dev/acpica/components/utilities/utstrsuppt.c b/sys/contrib/dev/acpica/components/utilities/utstrsuppt.c
index 3c5e591735b0..18e95a254e0d 100644
--- a/sys/contrib/dev/acpica/components/utilities/utstrsuppt.c
+++ b/sys/contrib/dev/acpica/components/utilities/utstrsuppt.c
@@ -274,7 +274,7 @@ AcpiUtConvertDecimalString (
          * 1) Runtime: terminate with no error, per the ACPI spec
          * 2) Compiler: return an error
          */
-        if (!isdigit (*String))
+        if (!isdigit ((int) *String))
         {
 #ifdef ACPI_ASL_COMPILER
             Status = AE_BAD_DECIMAL_CONSTANT;
@@ -336,7 +336,7 @@ AcpiUtConvertHexString (
          * 1) Runtime: terminate with no error, per the ACPI spec
          * 2) Compiler: return an error
          */
-        if (!isxdigit (*String))
+        if (!isxdigit ((int) *String))
         {
 #ifdef ACPI_ASL_COMPILER
             Status = AE_BAD_HEX_CONSTANT;
diff --git a/sys/contrib/dev/acpica/include/acexcep.h b/sys/contrib/dev/acpica/include/acexcep.h
index 11c81398e915..8cbd75498642 100644
--- a/sys/contrib/dev/acpica/include/acexcep.h
+++ b/sys/contrib/dev/acpica/include/acexcep.h
@@ -204,11 +204,11 @@ typedef struct acpi_exception_info
 
 #define AE_OK                           (ACPI_STATUS) 0x0000
 
-#define ACPI_ENV_EXCEPTION(Status)      (Status & AE_CODE_ENVIRONMENTAL)
-#define ACPI_AML_EXCEPTION(Status)      (Status & AE_CODE_AML)
-#define ACPI_PROG_EXCEPTION(Status)     (Status & AE_CODE_PROGRAMMER)
-#define ACPI_TABLE_EXCEPTION(Status)    (Status & AE_CODE_ACPI_TABLES)
-#define ACPI_CNTL_EXCEPTION(Status)     (Status & AE_CODE_CONTROL)
+#define ACPI_ENV_EXCEPTION(Status)      (((Status) & AE_CODE_MASK) == AE_CODE_ENVIRONMENTAL)
+#define ACPI_AML_EXCEPTION(Status)      (((Status) & AE_CODE_MASK) == AE_CODE_AML)
+#define ACPI_PROG_EXCEPTION(Status)     (((Status) & AE_CODE_MASK) == AE_CODE_PROGRAMMER)
+#define ACPI_TABLE_EXCEPTION(Status)    (((Status) & AE_CODE_MASK) == AE_CODE_ACPI_TABLES)
+#define ACPI_CNTL_EXCEPTION(Status)     (((Status) & AE_CODE_MASK) == AE_CODE_CONTROL)
 
 
 /*
diff --git a/sys/contrib/dev/acpica/include/acpixf.h b/sys/contrib/dev/acpica/include/acpixf.h
index 60eb6818b7e3..3e00747aebca 100644
--- a/sys/contrib/dev/acpica/include/acpixf.h
+++ b/sys/contrib/dev/acpica/include/acpixf.h
@@ -154,7 +154,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20201113
+#define ACPI_CA_VERSION                 0x20201217
 
 #include <contrib/dev/acpica/include/acconfig.h>
 #include <contrib/dev/acpica/include/actypes.h>
diff --git a/sys/contrib/dev/acpica/include/actypes.h b/sys/contrib/dev/acpica/include/actypes.h
index 48388c2198ed..1f0a189ab4ba 100644
--- a/sys/contrib/dev/acpica/include/actypes.h
+++ b/sys/contrib/dev/acpica/include/actypes.h
@@ -1537,5 +1537,10 @@ typedef enum
 
 #define ACPI_OPT_END                    -1
 
+/* Definitions for explicit fallthrough */
+
+#ifndef ACPI_FALLTHROUGH
+#define ACPI_FALLTHROUGH do {} while(0)
+#endif
 
 #endif /* __ACTYPES_H__ */
diff --git a/sys/contrib/dev/acpica/include/platform/acgcc.h b/sys/contrib/dev/acpica/include/platform/acgcc.h
index 1b48d6040c64..29ee8a30307a 100644
--- a/sys/contrib/dev/acpica/include/platform/acgcc.h
+++ b/sys/contrib/dev/acpica/include/platform/acgcc.h
@@ -198,4 +198,19 @@ typedef __builtin_va_list       va_list;
 
 #define ACPI_USE_NATIVE_MATH64
 
+/* GCC did not support __has_attribute until 5.1. */
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+/*
+ * Explictly mark intentional explicit fallthrough to silence
+ * -Wimplicit-fallthrough in GCC 7.1+.
+ */
+
+#if __has_attribute(__fallthrough__)
+#define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
+#endif
+
 #endif /* __ACGCC_H__ */