As suggested by @mcgrathr in D118099
Reviewed By: lntue
Differential Revision: https://reviews.llvm.org/D119978
namespace __llvm_libc {
LLVM_LIBC_FUNCTION(double, cos, (double x)) {
- double result;
- __asm__ __volatile__("fcos" : "=t"(result) : "f"(x) : "cc");
- return result;
+ __asm__ __volatile__("fcos" : "+t"(x));
+ return x;
}
} // namespace __llvm_libc
namespace __llvm_libc {
LLVM_LIBC_FUNCTION(double, sin, (double x)) {
- double result;
- __asm__ __volatile__("fsin" : "=t"(result) : "f"(x) : "cc");
- return result;
+ __asm__ __volatile__("fsin" : "+t"(x));
+ return x;
}
} // namespace __llvm_libc
LLVM_LIBC_FUNCTION(double, tan, (double x)) {
double result;
- double one;
// The fptan instruction pushes the number 1 on to the FP stack after
// computing tan. So, we read out the one before popping the actual result.
- __asm__ __volatile__("fptan" : "=t"(one) : "f"(x) : "cc");
+ __asm__ __volatile__("fptan" : "+t"(x));
__asm__ __volatile__("fstpl %0" : "=m"(result));
return result;
}