From 6c1e8fe788b3d71e41b9995fc770158c9c2fa67d Mon Sep 17 00:00:00 2001
From: iliya <iliya.saroukha@hes-so.ch>
Date: Tue, 17 Oct 2023 18:19:42 +0200
Subject: [PATCH] started working on last exercise
---
2-3_asm/src/assembleur.s | 54 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/2-3_asm/src/assembleur.s b/2-3_asm/src/assembleur.s
index 9339342..9faf541 100644
--- a/2-3_asm/src/assembleur.s
+++ b/2-3_asm/src/assembleur.s
@@ -10,6 +10,7 @@
.global funcexo1
.global funcexo2
.global funcexo3
+.global funcexo4
/*****************************************************
@@ -94,5 +95,58 @@ funcexo3:
bx lr
+
+
+
+/*****************************************************
+ * function : exercice 4
+ * R0: n
+ * return value : value of fibonacci sequence for n
+ *****************************************************/
+.thumb_func
+funcexo4:
+ mov r1, r0
+ push {r0, r1, lr}
+ bl lhs_fact
+
+lhs_fact:
+ pop {r0, r1, lr}
+ sub r0, #1
+ cmp r0, #1
+ bgt lhs_fact
+ bl rhs_fact
+
+rhs_fact:
+
+
+exit_ret:
+ pop {r0, r1, lr}
+ mov r0, #1
+
+ bx lr
+
+
+
+fact:
+ push {r0, r1, lr}
+ sub r0, #1
+ cmp r0, #1
+ bgt rcall
+ sub r1, #2
+ cmp r1, #1
+ bgt rcall
+ add sp, #12
+
+ bx lr
+
+
+rcall:
+ bl fact
+ pop {r0, r1, lr}
+ add r0, r1
+
+ bx lr
+
+
//.weak add_sat
.ltorg
--
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