From 052d7ec1d731e5e415120cc46af49e1115d1d79f Mon Sep 17 00:00:00 2001
From: Xiaolin Zhao <zhaoxiaolin@loongson.cn>
Date: Wed, 27 Jul 2022 18:35:18 +0800
Subject: [PATCH] LoongArch64: Add support for LuaJIT VM builder

Co-developed-by: Qiqi Huang <huangqiqi@loongson.cn>
---
 src/host/buildvm.c     | 2 ++
 src/host/buildvm_asm.c | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/src/host/buildvm.c b/src/host/buildvm.c
index 9ee47ada..b983c22f 100644
--- a/src/host/buildvm.c
+++ b/src/host/buildvm.c
@@ -67,6 +67,8 @@ static int collect_reloc(BuildCtx *ctx, uint8_t *addr, int idx, int type);
 #include "../dynasm/dasm_ppc.h"
 #elif LJ_TARGET_MIPS
 #include "../dynasm/dasm_mips.h"
+#elif LJ_TARGET_LOONGARCH64
+#include "../dynasm/dasm_loongarch64.h"
 #else
 #error "No support for this architecture (yet)"
 #endif
diff --git a/src/host/buildvm_asm.c b/src/host/buildvm_asm.c
index 7baa011f..e947b3f0 100644
--- a/src/host/buildvm_asm.c
+++ b/src/host/buildvm_asm.c
@@ -156,6 +156,15 @@ static void emit_asm_wordreloc(BuildCtx *ctx, uint8_t *p, int n,
 	  "Error: unsupported opcode %08x for %s symbol relocation.\n",
 	  ins, sym);
   exit(1);
+#elif LJ_TARGET_LOONGARCH64
+  if ((ins >> 26) == 21) {
+    fprintf(ctx->fp, "\tbl %s\n", sym);
+  } else {
+    fprintf(stderr,
+            "Error: unsupported opcode %08x for %s symbol relocation.\n",
+            ins, sym);
+    exit(1);
+  }
 #else
 #error "missing relocation support for this architecture"
 #endif