Vortex 2.0 changes:

+ Microarchitecture optimizations
+ 64-bit support
+ Xilinx FPGA support
+ LLVM-16 support
+ Refactoring and quality control fixes

kernel/src/vx_print.S

@@ -0,0 +1,32 @@
+// Copyright © 2019-2023
+// 
+// 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.
+
+#include <VX_config.h>
+#include <VX_types.h>
+
+.type vx_putchar, @function
+.global vx_putchar
+vx_putchar:
+    csrr t0, VX_CSR_MHARTID
+    andi t0, t0, %lo(IO_COUT_SIZE-1)
+#if (XLEN == 64)
+    li t1, (IO_COUT_ADDR >> 32)        
+    slli t1, t1, 32                       
+    li t2, (IO_COUT_ADDR & 0xffffffff) 
+    or t1, t1, t2   
+#else
+    li t1, IO_COUT_ADDR
+#endif
+    add t0, t0, t1    
+    sb a0, 0(t0)
+    ret