1 files changed, 44 insertions, 47 deletions
diff --git a/lib/builtins/ppc/gcc_qmul.c b/lib/builtins/ppc/gcc_qmul.c
index fb4c5164c..75f519aad 100644
--- a/lib/builtins/ppc/gcc_qmul.c
+++ b/lib/builtins/ppc/gcc_qmul.c
@@ -1,53 +1,50 @@
-/* This file is distributed under the University of Illinois Open Source
- * License. See LICENSE.TXT for details.
- */
+// 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
 
-/* long double __gcc_qmul(long double x, long double y);
- * This file implements the PowerPC 128-bit double-double multiply operation.
- * This implementation is shamelessly cribbed from Apple's DDRT, circa 1993(!)
- */
+// long double __gcc_qmul(long double x, long double y);
+// This file implements the PowerPC 128-bit double-double multiply operation.
+// This implementation is shamelessly cribbed from Apple's DDRT, circa 1993(!)
 
 #include "DD.h"
 
-long double __gcc_qmul(long double x, long double y)
-{	
-	static const uint32_t infinityHi = UINT32_C(0x7ff00000);
-	DD dst = { .ld = x }, src = { .ld = y };
-	
-	register double A = dst.s.hi, a = dst.s.lo,
-					B = src.s.hi, b = src.s.lo;
-	
-	double aHi, aLo, bHi, bLo;
-    double ab, tmp, tau;
-	
-	ab = A * B;
-	
-	/* Detect special cases */
-	if (ab == 0.0) {
-		dst.s.hi = ab;
-		dst.s.lo = 0.0;
-		return dst.ld;
-	}
-	
-	const doublebits abBits = { .d = ab };
-	if (((uint32_t)(abBits.x >> 32) & infinityHi) == infinityHi) {
-		dst.s.hi = ab;
-		dst.s.lo = 0.0;
-		return dst.ld;
-	}
-	
-	/* Generic cases handled here. */
-    aHi = high26bits(A);
-    bHi = high26bits(B);
-    aLo = A - aHi;
-    bLo = B - bHi;
-	
-    tmp = LOWORDER(ab, aHi, aLo, bHi, bLo);
-    tmp += (A * b + a * B);
-    tau = ab + tmp;
-	
-    dst.s.lo = (ab - tau) + tmp;
-    dst.s.hi = tau;
-	
+long double __gcc_qmul(long double x, long double y) {
+  static const uint32_t infinityHi = UINT32_C(0x7ff00000);
+  DD dst = {.ld = x}, src = {.ld = y};
+
+  register double A = dst.s.hi, a = dst.s.lo, B = src.s.hi, b = src.s.lo;
+
+  double aHi, aLo, bHi, bLo;
+  double ab, tmp, tau;
+
+  ab = A * B;
+
+  // Detect special cases
+  if (ab == 0.0) {
+    dst.s.hi = ab;
+    dst.s.lo = 0.0;
+    return dst.ld;
+  }
+
+  const doublebits abBits = {.d = ab};
+  if (((uint32_t)(abBits.x >> 32) & infinityHi) == infinityHi) {
+    dst.s.hi = ab;
+    dst.s.lo = 0.0;
     return dst.ld;
+  }
+
+  // Generic cases handled here.
+  aHi = high26bits(A);
+  bHi = high26bits(B);
+  aLo = A - aHi;
+  bLo = B - bHi;
+
+  tmp = LOWORDER(ab, aHi, aLo, bHi, bLo);
+  tmp += (A * b + a * B);
+  tau = ab + tmp;
+
+  dst.s.lo = (ab - tau) + tmp;
+  dst.s.hi = tau;
+
+  return dst.ld;
 }