Implemented math.h

libc/math/trig.c

@@ -0,0 +1,61 @@
+#include <math.h>
+
+double sin(double x) {
+    double res;
+    __asm__ volatile (
+        "fldl %1\n"     // Load x to the FPU stack
+        "fsin\n"        // Compute sin(x)
+        "fstpl %0"      // Store result
+        : "=m"(res) : "m"(x)
+    );
+    return res;
+}
+
+double cos(double x) {
+    double res;
+    __asm__ volatile (
+        "fldl %1\n"     // Load x to the FPU stack
+        "fcos\n"        // Compute cos(x)
+        "fstpl %0"      // Store result
+        : "=m"(res) : "m"(x)
+    );
+    return res;
+}
+
+
+double tan(double x) {
+    return sin(x) / cos(x);
+}
+
+double asin(double x) {
+    return atan2(x, sqrt(1 - x*x));
+}
+
+double acos(double x) {
+    return M_PI_2 - asin(x);
+}
+
+double atan(double x) {
+    double res;
+    __asm__ volatile (
+        "fld1\n"        // Load 1.0 to the FPU stack
+        "fldl %1\n"     // Load x to the FPU stack
+        "fpatan\n"      // Compute atan(x)
+        "fstpl %0"      // Store result
+        : "=m"(res) : "m"(x)
+    );
+    return res;
+}
+
+double atan2(double y, double x) {
+    double res;
+    __asm__ volatile (
+        "fldl %2\n"       // Load x to the FPU stack
+        "fldl %1\n"       // Load y to the FPU stack
+        "fpatan\n"        // Compute atan2(y, x)
+        "fstpl %0"        // Store the result
+        : "=m"(res) : "m"(y), "m"(x)
+    );
+    return res;
+}
+