1 files changed, 51 insertions, 0 deletions
diff --git a/dhrystone/start.S b/dhrystone/start.S
new file mode 100644
index 0000000..9fb2359
--- /dev/null
+++ b/dhrystone/start.S
@@ -0,0 +1,51 @@
+	.section .text
+	.global start
+	.global main
+
+start:
+	/* print "START\n" */
+	lui a0,0x10000000>>12
+	addi a1,zero,'S'
+	addi a2,zero,'T'
+	addi a3,zero,'A'
+	addi a4,zero,'R'
+	addi a5,zero,'\n'
+	sw a1,0(a0)
+	sw a2,0(a0)
+	sw a3,0(a0)
+	sw a4,0(a0)
+	sw a2,0(a0)
+	sw a5,0(a0)
+
+	/* execute some insns for "make timing" */
+	lui a0,0
+	auipc a0,0
+	slli a0,a0,0
+	slli a0,a0,31
+	addi a1,zero,0
+	sll a0,a0,a1
+	addi a1,zero,31
+	sll a0,a0,a1
+
+	/* set stack pointer */
+	lui sp,(64*1024)>>12
+
+	/* jump to main C code */
+	jal ra,main
+
+	/* print "DONE\n" */
+	lui a0,0x10000000>>12
+	addi a1,zero,'D'
+	addi a2,zero,'O'
+	addi a3,zero,'N'
+	addi a4,zero,'E'
+	addi a5,zero,'\n'
+	sw a1,0(a0)
+	sw a2,0(a0)
+	sw a3,0(a0)
+	sw a4,0(a0)
+	sw a5,0(a0)
+
+	/* trap */
+	ebreak
+