Code style and Readability fixes. Credit to Craig van Vliet.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@78403 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/floatundisf.c b/lib/floatundisf.c
index 66099e0..79b4b82 100644
--- a/lib/floatundisf.c
+++ b/lib/floatundisf.c
@@ -1,25 +1,27 @@
-//===-- floatundisf.c - Implement __floatundisf ---------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements __floatundisf for the compiler_rt library.
-//
-//===----------------------------------------------------------------------===//
+/*===-- floatundisf.c - Implement __floatundisf ---------------------------===
+ *
+ * The LLVM Compiler Infrastructure
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __floatundisf for the compiler_rt library.
+ *
+ *===----------------------------------------------------------------------===
+ */
#include "int_lib.h"
#include <float.h>
-// Returns: convert a to a float, rounding toward even.
+/* Returns: convert a to a float, rounding toward even. */
-// Assumption: float is a IEEE 32 bit floating point type
-// du_int is a 64 bit integral type
+/* Assumption: float is a IEEE 32 bit floating point type
+ * du_int is a 64 bit integral type
+ */
-// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
+/* seee eeee emmm mmmm mmmm mmmm mmmm mmmm */
float
__floatundisf(du_int a)
@@ -27,17 +29,18 @@
if (a == 0)
return 0.0F;
const unsigned N = sizeof(du_int) * CHAR_BIT;
- int sd = N - __builtin_clzll(a); // number of significant digits
- int e = sd - 1; // exponent
+ int sd = N - __builtin_clzll(a); /* number of significant digits */
+ int e = sd - 1; /* 8 exponent */
if (sd > FLT_MANT_DIG)
{
- // start: 0000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQxxxxxxxxxxxxxxxxxx
- // finish: 000000000000000000000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQR
- // 12345678901234567890123456
- // 1 = msb 1 bit
- // P = bit FLT_MANT_DIG-1 bits to the right of 1
- // Q = bit FLT_MANT_DIG bits to the right of 1
- // R = "or" of all bits to the right of Q
+ /* start: 0000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQxxxxxxxxxxxxxxxxxx
+ * finish: 000000000000000000000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQR
+ * 12345678901234567890123456
+ * 1 = msb 1 bit
+ * P = bit FLT_MANT_DIG-1 bits to the right of 1
+ * Q = bit FLT_MANT_DIG bits to the right of 1
+ * R = "or" of all bits to the right of Q
+ */
switch (sd)
{
case FLT_MANT_DIG + 1:
@@ -49,25 +52,25 @@
a = (a >> (sd - (FLT_MANT_DIG+2))) |
((a & ((du_int)(-1) >> ((N + FLT_MANT_DIG+2) - sd))) != 0);
};
- // finish:
- a |= (a & 4) != 0; // Or P into R
- ++a; // round - this step may add a significant bit
- a >>= 2; // dump Q and R
- // a is now rounded to FLT_MANT_DIG or FLT_MANT_DIG+1 bits
+ /* finish: */
+ a |= (a & 4) != 0; /* Or P into R */
+ ++a; /* round - this step may add a significant bit */
+ a >>= 2; /* dump Q and R */
+ /* a is now rounded to FLT_MANT_DIG or FLT_MANT_DIG+1 bits */
if (a & ((du_int)1 << FLT_MANT_DIG))
{
a >>= 1;
++e;
}
- // a is now rounded to FLT_MANT_DIG bits
+ /* a is now rounded to FLT_MANT_DIG bits */
}
else
{
a <<= (FLT_MANT_DIG - sd);
- // a is now rounded to FLT_MANT_DIG bits
+ /* a is now rounded to FLT_MANT_DIG bits */
}
float_bits fb;
- fb.u = ((e + 127) << 23) | // exponent
- ((su_int)a & 0x007FFFFF); // mantissa
+ fb.u = ((e + 127) << 23) | /* exponent */
+ ((su_int)a & 0x007FFFFF); /* mantissa */
return fb.f;
}