From e3f70678d27338a20357e071aa092770e20086ba Mon Sep 17 00:00:00 2001
From: huke <huke@xiaomi.com>
Date: Tue, 26 Sep 2023 18:54:36 +0800
Subject: [PATCH] add meta lib

Signed-off-by: huke <huke@xiaomi.com>
---
 src/backend/binaryen/lib/interface/meta.wat | 163 ++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 src/backend/binaryen/lib/interface/meta.wat

diff --git a/src/backend/binaryen/lib/interface/meta.wat b/src/backend/binaryen/lib/interface/meta.wat
new file mode 100644
index 00000000..8968b2a5
--- /dev/null
+++ b/src/backend/binaryen/lib/interface/meta.wat
@@ -0,0 +1,163 @@
+(module
+ (type $i32_i32_i32_=>_i32 (func (param i32 i32 i32) (result i32)))
+ (type $FUNCSIG$iii (func (param i32 i32) (result i32)))
+ (import "env" "strcmp" (func $strcmp (type $FUNCSIG$iii) (param i32 i32) (result i32)))
+ (memory $0 1)
+ (export "memory" (memory $0))
+ (export "find_index" (func $find_index))
+ (export "find_type_by_index" (func $find_type_by_index))
+ (func $find_index (type $i32_i32_i32_=>_i32) (; has Stack IR ;) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  (block $label$0
+   (if
+    (i32.gt_s
+     (local.tee $5
+      (i32.load offset=8
+       (local.get $0)
+      )
+     )
+     (i32.const 0)
+    )
+    (block
+     (local.set $0
+      (i32.add
+       (local.get $0)
+       (i32.const 16)
+      )
+     )
+     (loop $label$2
+      (local.set $4
+       (i32.load
+        (local.get $0)
+       )
+      )
+      (br_if $label$0
+       (i32.eqz
+        (i32.or
+         (call $strcmp
+          (i32.load
+           (i32.sub
+            (local.get $0)
+            (i32.const 4)
+           )
+          )
+          (local.get $1)
+         )
+         (i32.and
+          (i32.xor
+           (local.get $2)
+           (local.get $4)
+          )
+          (i32.const 15)
+         )
+        )
+       )
+      )
+      (local.set $0
+       (i32.add
+        (local.get $0)
+        (i32.const 12)
+       )
+      )
+      (br_if $label$2
+       (i32.lt_s
+        (local.tee $3
+         (i32.add
+          (local.get $3)
+          (i32.const 1)
+         )
+        )
+        (local.get $5)
+       )
+      )
+     )
+    )
+   )
+   (return
+    (i32.const -1)
+   )
+  )
+  (i32.shr_u
+   (local.get $4)
+   (i32.const 4)
+  )
+ )
+ (func $find_type_by_index (type $i32_i32_i32_=>_i32) (; has Stack IR ;) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
+  (local $3 i32)
+  (local $4 i32)
+  (block $label$0
+   (if
+    (i32.gt_s
+     (local.tee $4
+      (i32.load offset=8
+       (local.get $0)
+      )
+     )
+     (i32.const 0)
+    )
+    (block
+     (local.set $0
+      (i32.add
+       (local.get $0)
+       (i32.const 20)
+      )
+     )
+     (loop $label$2
+      (if
+       (i32.eqz
+        (call $strcmp
+         (i32.load
+          (i32.sub
+           (local.get $0)
+           (i32.const 8)
+          )
+         )
+         (local.get $1)
+        )
+       )
+       (br_if $label$0
+        (i32.eq
+         (i32.and
+          (i32.load
+           (i32.sub
+            (local.get $0)
+            (i32.const 4)
+           )
+          )
+          (i32.const 15)
+         )
+         (local.get $2)
+        )
+       )
+      )
+      (local.set $0
+       (i32.add
+        (local.get $0)
+        (i32.const 12)
+       )
+      )
+      (br_if $label$2
+       (i32.lt_s
+        (local.tee $3
+         (i32.add
+          (local.get $3)
+          (i32.const 1)
+         )
+        )
+        (local.get $4)
+       )
+      )
+     )
+    )
+   )
+   (return
+    (i32.const -1)
+   )
+  )
+  (i32.load
+   (local.get $0)
+  )
+ )
+)