Initial Commit

1 files changed, 104 insertions, 0 deletions

diff --git a/VexRiscvSocSoftware/projects/raw/dhrystone/src/stdlib.c b/VexRiscvSocSoftware/projects/raw/dhrystone/src/stdlib.c
new file mode 100644
index 0000000..7ec3503
--- /dev/null
+++ b/VexRiscvSocSoftware/projects/raw/dhrystone/src/stdlib.c
@@ -0,0 +1,104 @@
+// This is free and unencumbered software released into the public domain.
+//
+// Anyone is free to copy, modify, publish, use, compile, sell, or
+// distribute this software, either in source code form or as a compiled
+// binary, for any purpose, commercial or non-commercial, and by any
+// means.
+
+#include <stdarg.h>
+#include <stdint.h>
+
+
+#define TEST_COM_BASE ((volatile uint32_t*)(0xF00FFF00))
+
+extern char *malloc();
+extern int printf(const char *format, ...);
+
+char heap_memory[1024];
+int heap_memory_used = 0;
+
+char *malloc(int size)
+{
+	char *p = heap_memory + heap_memory_used;
+	// printf("[malloc(%d) -> %d (%d..%d)]", size, (int)p, heap_memory_used, heap_memory_used + size);
+	heap_memory_used += size;
+	if (heap_memory_used > 1024)
+		asm volatile ("ebreak");
+	return p;
+}
+
+static void printf_c(int c)
+{
+	putchar(c);
+}
+
+static void printf_s(char *p)
+{
+	while (*p)
+		putchar(*(p++));
+}
+
+static void printf_d(int val)
+{
+	char buffer[32];
+	char *p = buffer;
+	if (val < 0) {
+		printf_c('-');
+		val = -val;
+	}
+	while (val || p == buffer) {
+		*(p++) = '0' + val % 10;
+		val = val / 10;
+	}
+	while (p != buffer)
+		printf_c(*(--p));
+}
+
+int printf(const char *format, ...)
+{
+	int i;
+	va_list ap;
+
+	va_start(ap, format);
+
+	for (i = 0; format[i]; i++)
+		if (format[i] == '%') {
+			while (format[++i]) {
+				if (format[i] == 'c') {
+					printf_c(va_arg(ap,int));
+					break;
+				}
+				if (format[i] == 's') {
+					printf_s(va_arg(ap,char*));
+					break;
+				}
+				if (format[i] == 'd') {
+					printf_d(va_arg(ap,int));
+					break;
+				}
+			}
+		} else
+			printf_c(format[i]);
+
+	va_end(ap);
+}
+
+
+int puts(char *s){
+  while (*s) {
+    putchar(*s);
+    s++;
+  }
+  putchar('\n');
+  return 0;
+}
+
+void putchar(char c){
+	TEST_COM_BASE[0] = c;
+}
+
+#include <time.h>
+clock_t	clock(){
+  return TEST_COM_BASE[4];
+}
+