From 771a1470cf4630670c8bb4ba8436bfc7cd2e38ca Mon Sep 17 00:00:00 2001
From: pacien
Date: Wed, 6 Jun 2018 15:25:08 +0200
Subject: extract func param passing

---
 src/generator.c | 7 +++++++
 src/generator.h | 4 ++--
 src/tpc.y       | 5 +----
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/generator.c b/src/generator.c
index 9948966..e7a33c8 100644
--- a/src/generator.c
+++ b/src/generator.c
@@ -137,6 +137,13 @@ Type gen_function_call(const char name[], int nb_param) {
   return return_type;
 }
 
+void gen_function_param_passing(int nb_params) {
+  for(int i = 1; i <= nb_params; i++) {
+    fprintf(output, "mov r8, [rbp + %d]\n", (nb_params - i + 2) * 8);
+    fprintf(output, "mov [rbp - %d], r8\n", i * 8);
+  }
+}
+
 void gen_declaration(const char name[], Type type, Scope scope) {
   switch (scope) {
   case GLOBAL:
diff --git a/src/generator.h b/src/generator.h
index 94b03c8..bf48644 100644
--- a/src/generator.h
+++ b/src/generator.h
@@ -20,17 +20,17 @@ void gen_epilogue();
 void gen_const(const char name[], int value, Scope scope);
 
 Type gen_function_declaration(const char name[], int return_type);
-void gen_tab_declaration(const char name[], Scope scope, int size);
 void gen_function_end_declaration(const char name[], Type return_type, int nb_param);
 void gen_function_return(Type expect, Type actual);
 Type gen_function_call(const char name[], int nb_param);
+void gen_function_param_passing(int nb_params);
 
+void gen_tab_declaration(const char name[], Scope scope, int size);
 void gen_declaration(const char name[], Type type, Scope scope);
 void gen_check(const char name[], Scope scope);
 
 void gen_reade(const char name[], Scope scope);
 void gen_readc(const char name[], Scope scope);
-
 void gen_print(Type type);
 
 void gen_if_label(int idx);
diff --git a/src/tpc.y b/src/tpc.y
index 1e6b6e2..266232f 100644
--- a/src/tpc.y
+++ b/src/tpc.y
@@ -114,10 +114,7 @@ ListTypVar:
 | TYPE IDENT                        { gen_declaration($<ident>2, $<type>1, scope); $<num>$ = 1; }
 ;
 Corps:
-  '{'                               { int i;
-                                      for(i=1;i<=nb_param[num_scope];i++){
-                                        fprintf(output, "mov r8, [rbp + %d]\nmov [rbp - %d], r8\n", (nb_param[num_scope]-i+2)*8, i*8);
-                                      } }
+  '{'                               { gen_function_param_passing(nb_param[num_scope]); }
   DeclConsts DeclVars SuiteInstr '}'
 ;
 SuiteInstr:
-- 
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