[ Patch 001 ] feature: add support for loongarch

[wuruilong <wuruilong@loongson.cn>]

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Dear Maintainer:
   sparse compiles incorrectly on loongarch, the attached patch compiles 
successfully after local testing.

wuruilong


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From 474acf81ee8162f50c20f41a566510d84a1f828c Mon Sep 17 00:00:00 2001
From: wuruilong <wuruilong@loongson.cn>
Date: Fri, 24 May 2024 02:23:46 +0000
Subject: [PATCH] Add support for loongarch

Signed-off-by: wuruilong <wuruilong@loongson.cn>
---
 Makefile             |  1 +
 machine.h            |  3 +++
 target-loongarch64.c | 21 +++++++++++++++++++
 target.c             | 48 +++++++++++++++++++++++---------------------
 target.h             |  1 +
 5 files changed, 51 insertions(+), 23 deletions(-)
 create mode 100644 target-loongarch64.c

diff --git a/Makefile b/Makefile
index e172758b..315617f4 100644
--- a/Makefile
+++ b/Makefile
@@ -73,6 +73,7 @@ LIB_OBJS += target-arm64.o
 LIB_OBJS += target-bfin.o
 LIB_OBJS += target-default.o
 LIB_OBJS += target-h8300.o
+LIB_OBJS += target-loongarch64.o
 LIB_OBJS += target-m68k.o
 LIB_OBJS += target-microblaze.o
 LIB_OBJS += target-mips.o
diff --git a/machine.h b/machine.h
index d05b5045..8be3aeed 100644
--- a/machine.h
+++ b/machine.h
@@ -42,6 +42,7 @@ enum machine {
 	MACH_OPENRISC,
 	MACH_SH,
 	MACH_XTENSA,
+	MACH_LOONGARCH64,
 	MACH_UNKNOWN
 };
 
@@ -55,6 +56,8 @@ enum machine {
 #define	MACH_NATIVE	MACH_X86_64
 #elif defined(__i386__) || defined(__i386)
 #define	MACH_NATIVE	MACH_I386
+#elif defined(__loongarch__)
+#define MACH_NATIVE     MACH_LOONGARCH64
 #elif defined(__mips64__) || (defined(__mips) && __mips == 64)
 #define	MACH_NATIVE	MACH_MIPS64
 #elif defined(__mips__) || defined(__mips)
diff --git a/target-loongarch64.c b/target-loongarch64.c
new file mode 100644
index 00000000..34b4d3d9
--- /dev/null
+++ b/target-loongarch64.c
@@ -0,0 +1,21 @@
+#include "symbol.h"
+#include "target.h"
+#include "machine.h"
+
+
+
+static void predefine_loongarch64(const struct target *self)
+{
+	predefine("__loongarch__", 1, "64");
+}
+
+const struct target target_loongarch64 = {
+	.mach = MACH_LOONGARCH64,
+	.bitness = ARCH_LP64,
+
+	.big_endian = 0,
+	.unsigned_char = 1,
+	.has_int128 = 1,
+
+	.predefine = predefine_loongarch64,
+};
diff --git a/target.c b/target.c
index 8ae22d74..0e075d59 100644
--- a/target.c
+++ b/target.c
@@ -94,6 +94,7 @@ static const struct target *targets[] = {
 	[MACH_PPC64] =		&target_ppc64,
 	[MACH_RISCV32] =	&target_riscv32,
 	[MACH_RISCV64] =	&target_riscv64,
+	[MACH_LOONGARCH64] =    &target_loongarch64,
 	[MACH_S390] =		&target_s390,
 	[MACH_S390X] =		&target_s390x,
 	[MACH_SH] =		&target_sh,
@@ -112,29 +113,30 @@ enum machine target_parse(const char *name)
 		enum machine mach;
 		char bits;
 	} archs[] = {
-		{ "alpha",	MACH_ALPHA,	64, },
-		{ "aarch64",	MACH_ARM64,	64, },
-		{ "arm64",	MACH_ARM64,	64, },
-		{ "arm",	MACH_ARM,	32, },
-		{ "bfin",	MACH_BFIN,	32, },
-		{ "h8300",	MACH_H8300,	32, },
-		{ "i386",	MACH_I386,	32, },
-		{ "m68k",	MACH_M68K,	32, },
-		{ "microblaze",	MACH_MICROBLAZE,32, },
-		{ "mips",	MACH_MIPS32,	0,  },
-		{ "nds32",	MACH_NDS32,	32, },
-		{ "nios2",	MACH_NIOS2,	32, },
-		{ "openrisc",	MACH_OPENRISC,	32, },
-		{ "powerpc",	MACH_PPC32,	0,  },
-		{ "ppc",	MACH_PPC32,	0,  },
-		{ "riscv",	MACH_RISCV32,	0,  },
-		{ "s390x",	MACH_S390X,	64, },
-		{ "s390",	MACH_S390,	32, },
-		{ "sparc",	MACH_SPARC32,	0,  },
-		{ "x86_64",	MACH_X86_64,	64, },
-		{ "x86-64",	MACH_X86_64,	64, },
-		{ "sh",		MACH_SH,	32, },
-		{ "xtensa",	MACH_XTENSA,	32, },
+		{ "alpha",	MACH_ALPHA,	 64, },
+		{ "aarch64",	MACH_ARM64,	 64, },
+		{ "arm64",	MACH_ARM64,	 64, },
+		{ "arm",	MACH_ARM,	 32, },
+		{ "bfin",	MACH_BFIN,	 32, },
+		{ "h8300",	MACH_H8300,	 32, },
+		{ "i386",	MACH_I386,	 32, },
+		{ "loongarch64",MACH_LOONGARCH64,64, },
+		{ "m68k",	MACH_M68K,	 32, },
+		{ "microblaze",	MACH_MICROBLAZE, 32, },
+		{ "mips",	MACH_MIPS32,	 0,  },
+		{ "nds32",	MACH_NDS32,	 32, },
+		{ "nios2",	MACH_NIOS2,	 32, },
+		{ "openrisc",	MACH_OPENRISC,	 32, },
+		{ "powerpc",	MACH_PPC32,	 0,  },
+		{ "ppc",	MACH_PPC32,	 0,  },
+		{ "riscv",	MACH_RISCV32,	 0,  },
+		{ "s390x",	MACH_S390X,	 64, },
+		{ "s390",	MACH_S390,	 32, },
+		{ "sparc",	MACH_SPARC32,	 0,  },
+		{ "x86_64",	MACH_X86_64,	 64, },
+		{ "x86-64",	MACH_X86_64,	 64, },
+		{ "sh",		MACH_SH,	 32, },
+		{ "xtensa",	MACH_XTENSA,	 32, },
 		{ NULL },
 	};
 	const struct arch *p;
diff --git a/target.h b/target.h
index 92b8af91..b24574ae 100644
--- a/target.h
+++ b/target.h
@@ -120,6 +120,7 @@ extern const struct target target_ppc32;
 extern const struct target target_ppc64;
 extern const struct target target_riscv32;
 extern const struct target target_riscv64;
+extern const struct target target_loongarch64;
 extern const struct target target_s390;
 extern const struct target target_s390x;
 extern const struct target target_sh;
-- 
2.43.0