Vendor things

third-party/vendor/fontdue/src/platform/float/trunc.rs

@@ -0,0 +1,30 @@
+// [See license/rust-lang/libm] Copyright (c) 2018 Jorge Aparicio
+#[cfg(not(all(any(target_arch = "x86", target_arch = "x86_64"), feature = "simd")))]
+pub fn trunc(x: f32) -> f32 {
+    let mut i: u32 = x.to_bits();
+    let mut e: i32 = (i >> 23 & 0xff) as i32 - 0x7f + 9;
+    let m: u32;
+    if e >= 23 + 9 {
+        return x;
+    }
+    if e < 9 {
+        e = 1;
+    }
+    m = -1i32 as u32 >> e;
+    if (i & m) == 0 {
+        return x;
+    }
+    i &= !m;
+    f32::from_bits(i)
+}
+
+#[cfg(all(any(target_arch = "x86", target_arch = "x86_64"), feature = "simd"))]
+#[inline(always)]
+pub fn trunc(value: f32) -> f32 {
+    #[cfg(target_arch = "x86")]
+    use core::arch::x86::*;
+    #[cfg(target_arch = "x86_64")]
+    use core::arch::x86_64::*;
+
+    unsafe { _mm_cvtss_f32(_mm_cvtepi32_ps(_mm_cvttps_epi32(_mm_set_ss(value)))) }
+}