init repo

lab1/csrc/sb.S

@@ -0,0 +1,25 @@
+# Copyright 2021 Howard Lau
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+.globl _start
+_start:
+  li a0, 0x4
+  li t0, 0xDEADBEEF
+  sb t0, 0(a0)
+  lw t1, 0(a0)
+  li s2, 0x15
+  sb s2, 1(a0)
+  lw ra, 0(a0)
+loop:
+  j loop