1 files changed, 66 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/floatsisf.c b/contrib/llvm-project/compiler-rt/lib/builtins/floatsisf.c
new file mode 100644
index 000000000000..5ede30b703e0
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/floatsisf.c
@@ -0,0 +1,66 @@
+//===-- lib/floatsisf.c - integer -> single-precision conversion --*- C -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements integer to single-precision conversion for the
+// compiler-rt library in the IEEE-754 default round-to-nearest, ties-to-even
+// mode.
+//
+//===----------------------------------------------------------------------===//
+
+#define SINGLE_PRECISION
+#include "fp_lib.h"
+
+#include "int_lib.h"
+
+COMPILER_RT_ABI fp_t __floatsisf(si_int a) {
+
+  const int aWidth = sizeof a * CHAR_BIT;
+
+  // Handle zero as a special case to protect clz
+  if (a == 0)
+    return fromRep(0);
+
+  // All other cases begin by extracting the sign and absolute value of a
+  rep_t sign = 0;
+  su_int aAbs = (su_int)a;
+  if (a < 0) {
+    sign = signBit;
+    aAbs = -aAbs;
+  }
+
+  // Exponent of (fp_t)a is the width of abs(a).
+  const int exponent = (aWidth - 1) - clzsi(aAbs);
+  rep_t result;
+
+  // Shift a into the significand field, rounding if it is a right-shift
+  if (exponent <= significandBits) {
+    const int shift = significandBits - exponent;
+    result = (rep_t)aAbs << shift ^ implicitBit;
+  } else {
+    const int shift = exponent - significandBits;
+    result = (rep_t)aAbs >> shift ^ implicitBit;
+    rep_t round = (rep_t)aAbs << (typeWidth - shift);
+    if (round > signBit)
+      result++;
+    if (round == signBit)
+      result += result & 1;
+  }
+
+  // Insert the exponent
+  result += (rep_t)(exponent + exponentBias) << significandBits;
+  // Insert the sign bit and return
+  return fromRep(result | sign);
+}
+
+#if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI fp_t __aeabi_i2f(int a) { return __floatsisf(a); }
+#else
+COMPILER_RT_ALIAS(__floatsisf, __aeabi_i2f)
+#endif
+#endif