From 30a7f9492e5e15f2d64dded11bc5080af6b54ec5 Mon Sep 17 00:00:00 2001
From: Rutherther <rutherther@proton.me>
Date: Sun, 29 Oct 2023 08:59:09 +0100
Subject: [PATCH] feat: add basic testing programs

---
 programs/add.c   | 11 +++++++++++
 programs/add.s   | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 programs/link.ld | 21 +++++++++++++++++++++
 programs/start.S |  8 ++++++++
 programs/tests.c |  7 +++++++
 5 files changed, 93 insertions(+)
 create mode 100755 programs/add.c
 create mode 100755 programs/add.s
 create mode 100755 programs/link.ld
 create mode 100755 programs/start.S
 create mode 100755 programs/tests.c

diff --git a/programs/add.c b/programs/add.c
new file mode 100755
index 0000000..46b56a7
--- /dev/null
+++ b/programs/add.c
@@ -0,0 +1,11 @@
+int add(int a, int b)
+{
+    return a + b;
+}
+
+void main()
+{
+    int a = 20;
+    int b = 30;
+    int c = add(a, b);
+}
diff --git a/programs/add.s b/programs/add.s
new file mode 100755
index 0000000..2d7575a
--- /dev/null
+++ b/programs/add.s
@@ -0,0 +1,46 @@
+	.file	"add.c"
+	.option nopic
+	.attribute arch, "rv32i2p1"
+	.attribute unaligned_access, 0
+	.attribute stack_align, 16
+	.text
+	.align	2
+	.globl	add
+	.type	add, @function
+add:
+	addi	sp,sp,-32
+	sw	s0,28(sp)
+	addi	s0,sp,32
+	sw	a0,-20(s0)
+	sw	a1,-24(s0)
+	lw	a4,-20(s0)
+	lw	a5,-24(s0)
+	add	a5,a4,a5
+	mv	a0,a5
+	lw	s0,28(sp)
+	addi	sp,sp,32
+	jr	ra
+	.size	add, .-add
+	.align	2
+	.globl	main
+	.type	main, @function
+main:
+	addi	sp,sp,-32
+	sw	ra,28(sp)
+	sw	s0,24(sp)
+	addi	s0,sp,32
+	li	a5,20
+	sw	a5,-20(s0)
+	li	a5,30
+	sw	a5,-24(s0)
+	lw	a1,-24(s0)
+	lw	a0,-20(s0)
+	call	add
+	sw	a0,-28(s0)
+	nop
+	lw	ra,28(sp)
+	lw	s0,24(sp)
+	addi	sp,sp,32
+	jr	ra
+	.size	main, .-main
+	.ident	"GCC: (GNU) 12.2.0"
diff --git a/programs/link.ld b/programs/link.ld
new file mode 100755
index 0000000..6bdb55d
--- /dev/null
+++ b/programs/link.ld
@@ -0,0 +1,21 @@
+MEMORY
+{
+    ram : ORIGIN = 0x00000000, LENGTH = 1K - 1
+}
+
+SECTIONS
+{
+	.text = 0x0;
+    .bss : {
+        __bss_start = .;
+        *(.bss)
+        *(COMMON)
+        __bss_end = .;
+    } > ram
+    .stack : {
+        __stack_start = .;
+        *(.stack)
+        __stack_end = .;
+    } > ram
+}
+
diff --git a/programs/start.S b/programs/start.S
new file mode 100755
index 0000000..85821c6
--- /dev/null
+++ b/programs/start.S
@@ -0,0 +1,8 @@
+.global _start
+
+.text
+_start:
+    addi sp, x0, 127
+    call main
+_loop:
+    j _loop
diff --git a/programs/tests.c b/programs/tests.c
new file mode 100755
index 0000000..3b705b2
--- /dev/null
+++ b/programs/tests.c
@@ -0,0 +1,7 @@
+void main()
+{
+	signed char a = -10;
+	signed char b = a << 1;
+	unsigned char c = ((unsigned char)b) >> 1;
+	signed char d = b >> 1;
+}
-- 
2.48.1