From f66e0212efe4f6572d5e81741e831ab735cc2fee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@ruby-lang.org>
Date: Thu, 9 Jul 2020 21:43:42 +0900
Subject: precalc invokebuiltin destinations

Noticed that struct rb_builtin_function is a purely compile-time
constant.  MJIT can eliminate some runtime calculations by statically
generate dedicated C code generator for each builtin functions.
---
 builtin.h | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

(limited to 'builtin.h')

diff --git a/builtin.h b/builtin.h
index ce02720e32..be7bb16a28 100644
--- a/builtin.h
+++ b/builtin.h
@@ -11,13 +11,17 @@ struct rb_builtin_function {
     // for load
     const int index;
     const char * const name;
+
+    // for jit
+    void (*compiler)(FILE *, long);
 };
 
-#define RB_BUILTIN_FUNCTION(_i, _name, _fname, _arity) { \
+#define RB_BUILTIN_FUNCTION(_i, _name, _fname, _arity, _compiler) {\
   .name = #_name, \
   .func_ptr = (void *)_fname, \
   .argc = _arity, \
-  .index = _i \
+  .index = _i, \
+  .compiler = _compiler, \
 }
 
 void rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table);
@@ -76,4 +80,20 @@ struct builtin_binary {
     size_t bin_size;
 };
 
+// mjit
+
+RBIMPL_ATTR_MAYBE_UNUSED()
+static void
+mjit_invokebuiltin_default_compiler(FILE *f, const struct rb_builtin_function *bf, long index)
+{
+    if (index >= 0) {
+        fprintf(f, "val = vm_invoke_builtin(ec, GET_CFP(), %p, STACK_ADDR_FROM_TOP(%d));\n",
+                (const void *)bf, bf->argc);
+    }
+    else {
+        fprintf(f, "val = vm_invoke_builtin_delegate(ec, GET_CFP(), %p, %ld);\n",
+                (const void *)bf, index);
+    }
+}
+
 #endif // BUILTIN_H_INCLUDED
-- 
cgit v1.2.1