ce02130e55
this eliminates panicking branches in the optimized version of the functions. We keep the bounds checks when running the test suite to check that we never do an out of bounds access. This commit also adds a "must link" test that ensures that future changes in our implementation won't add panicking branches. closes #129
116 lines
3.3 KiB
Rust
116 lines
3.3 KiB
Rust
#![feature(lang_items)]
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#![feature(panic_implementation)]
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#![no_main]
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#![no_std]
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extern crate libm;
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use core::panic::PanicInfo;
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use core::ptr;
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macro_rules! force_eval {
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($e:expr) => {
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unsafe {
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core::ptr::read_volatile(&$e);
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}
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};
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}
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#[no_mangle]
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pub fn main() {
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force_eval!(libm::acos(random()));
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force_eval!(libm::acosf(random()));
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force_eval!(libm::asin(random()));
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force_eval!(libm::asinf(random()));
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force_eval!(libm::atan(random()));
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force_eval!(libm::atan2(random(), random()));
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force_eval!(libm::atan2f(random(), random()));
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force_eval!(libm::atanf(random()));
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force_eval!(libm::cbrt(random()));
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force_eval!(libm::cbrtf(random()));
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force_eval!(libm::ceil(random()));
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force_eval!(libm::ceilf(random()));
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force_eval!(libm::cos(random()));
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force_eval!(libm::cosf(random()));
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force_eval!(libm::cosh(random()));
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force_eval!(libm::coshf(random()));
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force_eval!(libm::exp(random()));
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force_eval!(libm::exp2(random()));
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force_eval!(libm::exp2f(random()));
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force_eval!(libm::expf(random()));
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force_eval!(libm::expm1(random()));
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force_eval!(libm::expm1f(random()));
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force_eval!(libm::fabs(random()));
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force_eval!(libm::fabsf(random()));
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force_eval!(libm::fdim(random(), random()));
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force_eval!(libm::fdimf(random(), random()));
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force_eval!(libm::floor(random()));
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force_eval!(libm::floorf(random()));
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force_eval!(libm::fma(random(), random(), random()));
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force_eval!(libm::fmaf(random(), random(), random()));
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force_eval!(libm::fmod(random(), random()));
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force_eval!(libm::fmodf(random(), random()));
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force_eval!(libm::hypot(random(), random()));
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force_eval!(libm::hypotf(random(), random()));
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force_eval!(libm::log(random()));
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force_eval!(libm::log2(random()));
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force_eval!(libm::log10(random()));
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force_eval!(libm::log10f(random()));
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force_eval!(libm::log1p(random()));
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force_eval!(libm::log1pf(random()));
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force_eval!(libm::log2f(random()));
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force_eval!(libm::logf(random()));
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force_eval!(libm::pow(random(), random()));
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force_eval!(libm::powf(random(), random()));
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force_eval!(libm::round(random()));
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force_eval!(libm::roundf(random()));
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force_eval!(libm::scalbn(random(), random()));
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force_eval!(libm::scalbnf(random(), random()));
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force_eval!(libm::sin(random()));
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force_eval!(libm::sinf(random()));
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force_eval!(libm::sinh(random()));
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force_eval!(libm::sinhf(random()));
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force_eval!(libm::sqrt(random()));
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force_eval!(libm::sqrtf(random()));
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force_eval!(libm::tan(random()));
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force_eval!(libm::tanf(random()));
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force_eval!(libm::tanh(random()));
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force_eval!(libm::tanhf(random()));
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force_eval!(libm::trunc(random()));
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force_eval!(libm::truncf(random()));
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}
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fn random<T>() -> T
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where
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T: Copy,
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{
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unsafe {
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static mut X: usize = 0;
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X += 8;
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ptr::read_volatile(X as *const T)
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}
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}
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#[panic_implementation]
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#[no_mangle]
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pub fn panic(_info: &PanicInfo) -> ! {
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// loop {}
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extern "C" {
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fn thou_shalt_not_panic() -> !;
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}
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unsafe { thou_shalt_not_panic() }
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}
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#[link(name = "c")]
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extern "C" {}
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#[lang = "eh_personality"]
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fn eh() {}
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#[no_mangle]
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pub extern "C" fn __aeabi_unwind_cpp_pr0() {}
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#[no_mangle]
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pub extern "C" fn __aeabi_unwind_cpp_pr1() {}
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