1 files changed, 63 insertions, 0 deletions
diff --git a/fragments/run_fibonacci.cpp b/fragments/run_fibonacci.cpp
new file mode 100644
index 0000000..041d667
--- /dev/null
+++ b/fragments/run_fibonacci.cpp
@@ -0,0 +1,63 @@
+#include "mips.h"
+
+#include "f_fibonacci.c"
+
+int main(int argc, char *argv[])
+{
+    const char *srcName="f_fibonacci-mips.bin";
+    
+    if(argc>1){
+        srcName=argv[1];
+    }
+    
+    mips_mem_h m=mips_mem_create_ram(0x20000, 4);
+    mips_cpu_h c=mips_cpu_create(m);
+    
+    FILE *src=fopen(srcName,"rb");
+    if(!src){
+        fprintf(stderr, "Cannot load source file '%s', try specifying the relative path to f_fibonacci-mips.bin.", srcName);
+        exit(1);
+    }
+
+    uint32_t v;
+    uint32_t offset=0;
+    while(1==fread(&v, 4, 1, src)){
+        if(mips_mem_write(m, offset, 4, (uint8_t*)&v)){
+            fprintf(stderr, "Memory error while loading binary.");
+            exit(1);
+        }
+        offset+=4;
+    }
+    fprintf(stderr, "Loaded %d bytes of binary at address 0.", offset);
+    
+    fclose(src);
+    
+    // No error checking... oh my!
+    
+    uint32_t n=12;  // Value we will calculate fibonacci of
+    
+    uint32_t sentinelPC=0x10000000;
+    
+    mips_cpu_set_register(c, 31, sentinelPC);   // set return address to something invalid
+    mips_cpu_set_register(c, 4, n);             // Set input argument
+    mips_cpu_set_register(c, 29, 0x1000);       // Create a stack pointer
+    
+    uint32_t steps=0;
+    while(!mips_cpu_step(c)){
+        fprintf(stderr, "Step %d.\n", steps);
+        ++steps;
+        uint32_t pc;
+        mips_cpu_get_pc(c, &pc);
+        if(pc==sentinelPC)
+            break;
+    }
+    
+    uint32_t fib_n;
+    mips_cpu_get_register(c, 2, &fib_n);    // Get the result back
+    
+    uint32_t fib_n_ref=f_fibonacci(n);
+    
+    fprintf(stderr, "fib(%d) = %d, expected = %d\n", n, fib_n, fib_n_ref);
+    
+    return 0;
+}