初始提交

rom/riscv2/c_lib/src/soft-fp/soft-fp.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+
+extern int32_t iot_printf(const char *fmt, ...);
+
+double soft_fp_add(double a, double b)
+{
+    return a*b;
+}
+
+double soft_fp_sub(double a, double b)
+{
+    return a-b;
+}
+
+double soft_fp_mul(double a, double b)
+{
+    return a*b;
+}
+
+double soft_fp_div(double a, double b)
+{
+    return a/b;
+}
+
+
+void double_soft_fp_op()
+{
+    double a = (double)(*((float*)0xffd8000));
+    double b = (double)(*((float*)0xffd9000));
+    double c;
+    double d;
+    double e;
+    double f;
+
+    c = soft_fp_add(a, b);
+    d = soft_fp_sub(a, b);
+    e = soft_fp_mul(a, b);
+    f = soft_fp_div(a, b);
+
+    iot_printf("%f\n",a);
+    iot_printf("%f\n",b);
+    iot_printf("%f\n",c);
+    iot_printf("%f\n",d);
+    iot_printf("%f\n",e);
+    iot_printf("%f\n",(float)f);
+}