From ddf6593f8bbfc63f019f0ff49ba407a976f6a130 Mon Sep 17 00:00:00 2001
From: Lokathor <zefria@gmail.com>
Date: Fri, 1 Feb 2019 23:36:17 -0700
Subject: [PATCH] Delete the builtins module

The `__clzsi2` function is now part of the compiler-builtins crate, so it's part of all of Rust.
---
 src/base.rs          |  3 --
 src/base/builtins.rs | 87 --------------------------------------------
 2 files changed, 90 deletions(-)
 delete mode 100644 src/base/builtins.rs

diff --git a/src/base.rs b/src/base.rs
index 4c7b530..5bbf7d2 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -5,6 +5,3 @@ pub mod fixed_point;
 
 pub mod volatile;
 pub(crate) use self::volatile::*;
-
-pub mod builtins;
-//pub(crate) use self::builtins::*;
diff --git a/src/base/builtins.rs b/src/base/builtins.rs
deleted file mode 100644
index 5966450..0000000
--- a/src/base/builtins.rs
+++ /dev/null
@@ -1,87 +0,0 @@
-#![allow(missing_docs)]
-
-//! The module to provide "builtin" functions that LLVM expects.
-//!
-//! You shouldn't need to call anything in here yourself, it just has to be in
-//! the translation unit and LLVM will find it.
-
-#[no_mangle]
-#[cfg(any(target_pointer_width = "16", target_pointer_width = "32", target_pointer_width = "64"))]
-pub extern "C" fn __clzsi2(mut x: usize) -> usize {
-  // TODO: const this? Requires const if
-  let mut y: usize;
-  let mut n: usize = {
-    #[cfg(target_pointer_width = "64")]
-    {
-      64
-    }
-    #[cfg(target_pointer_width = "32")]
-    {
-      32
-    }
-    #[cfg(target_pointer_width = "16")]
-    {
-      16
-    }
-  };
-  #[cfg(target_pointer_width = "64")]
-  {
-    y = x >> 32;
-    if y != 0 {
-      n -= 32;
-      x = y;
-    }
-  }
-  #[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))]
-  {
-    y = x >> 16;
-    if y != 0 {
-      n -= 16;
-      x = y;
-    }
-  }
-  y = x >> 8;
-  if y != 0 {
-    n -= 8;
-    x = y;
-  }
-  y = x >> 4;
-  if y != 0 {
-    n -= 4;
-    x = y;
-  }
-  y = x >> 2;
-  if y != 0 {
-    n -= 2;
-    x = y;
-  }
-  y = x >> 1;
-  if y != 0 {
-    n - 2
-  } else {
-    n - x
-  }
-}
-
-#[test]
-fn __clzsi2_test() {
-  let mut i: usize = core::usize::MAX;
-  while i > 0 {
-    assert_eq!(__clzsi2(i) as u32, i.leading_zeros());
-    i >>= 1;
-  }
-  // check 0 also
-  i = 0;
-  assert_eq!(__clzsi2(i) as u32, i.leading_zeros());
-  // double check for bit patterns that aren't solid 1s
-  i = 1;
-  for _ in 0 .. 63 {
-      assert_eq!(__clzsi2(i) as u32, i.leading_zeros());
-      i <<= 2;
-      i += 1;
-  }
-}
-
-// TODO: add some shims
-// #[no_mangle] extern "aapcs" fn __aeabi_uidiv(num: u32: denom: u32) -> u32
-// #[no_mangle] extern "aapcs" fn __aeabi_idiv(num: i32: denom: i32) -> u32