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11210 libm should be cstyle(1ONBLD) clean
@@ -20,16 +20,19 @@
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
+
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-/* long double sinpil(long double x),
+/* BEGIN CSTYLED */
+/*
+ * long double sinpil(long double x),
* return long double precision sinl(pi*x).
*
* Algorithm, 10/17/2002, K.C. Ng
* ------------------------------
* Let y = |4x|, z = floor(y), and n = (int)(z mod 8.0) (displayed in binary).
@@ -64,109 +67,121 @@
* This will return a result with error slightly more than one ulp (but less
* than 2 ulp). If one wants accurate result, one may break up pi*t in
* high (tpi_h) and low (tpi_l) parts and call __k_sin/cos(tip_h, tip_lo)
* instead.
*/
+/* END CSTYLED */
#include "libm.h"
#include "longdouble.h"
#include <sys/isa_defs.h>
-#define I(q, m) ((int *) &(q))[m]
-#define U(q, m) ((unsigned *) &(q))[m]
+#define I(q, m) ((int *)&(q))[m]
+#define U(q, m) ((unsigned *)&(q))[m]
#if defined(__i386) || defined(__amd64)
-#define LDBL_MOST_SIGNIF_I(ld) ((I(ld, 2) << 16) | (0xffff & (I(ld, 1) >> 15)))
+#define LDBL_MOST_SIGNIF_I(ld) ((I(ld, 2) << 16) | (0xffff & (I(ld, \
+ 1) >> 15)))
#define LDBL_LEAST_SIGNIF_U(ld) U(ld, 0)
#define PREC 64
#define PRECM1 63
#define PRECM2 62
+
static const long double twoPRECM2 = 9.223372036854775808000000000000000e+18L;
#else
#define LDBL_MOST_SIGNIF_I(ld) I(ld, 0)
-#define LDBL_LEAST_SIGNIF_U(ld) U(ld, sizeof(long double) / sizeof(int) - 1)
+#define LDBL_LEAST_SIGNIF_U(ld) U(ld, sizeof (long double) / \
+ sizeof (int) - 1)
#define PREC 113
#define PRECM1 112
#define PRECM2 111
+
static const long double twoPRECM2 = 5.192296858534827628530496329220096e+33L;
#endif
-static const long double
-zero = 0.0L,
-quater = 0.25L,
-one = 1.0L,
-pi = 3.141592653589793238462643383279502884197e+0000L,
-sqrth = 0.707106781186547524400844362104849039284835937688474,
-tiny = 1.0e-100;
+static const long double zero = 0.0L,
+ quater = 0.25L,
+ one = 1.0L,
+ pi = 3.141592653589793238462643383279502884197e+0000L,
+ sqrth = 0.707106781186547524400844362104849039284835937688474,
+ tiny = 1.0e-100;
long double
-sinpil(long double x) {
+sinpil(long double x)
+{
long double y, z, t;
int hx, n, k;
unsigned lx;
hx = LDBL_MOST_SIGNIF_I(x);
lx = LDBL_LEAST_SIGNIF_U(x);
k = ((hx & 0x7fff0000) >> 16) - 0x3fff;
+
if (k >= PRECM2) { /* |x| >= 2**(Prec-2) */
- if (k >= 16384)
+ if (k >= 16384) {
y = x - x;
- else {
- if (k >= PREC)
+ } else {
+ if (k >= PREC) {
y = zero;
- else if (k == PRECM1)
- y = (lx & 1) == 0 ? zero: -zero;
- else { /* k = Prec - 2 */
+ } else if (k == PRECM1) {
+ y = (lx & 1) == 0 ? zero : -zero;
+ } else { /* k = Prec - 2 */
y = (lx & 1) == 0 ? zero : one;
+
if ((lx & 2) != 0)
y = -y;
}
}
- }
- else if (k < -2) /* |x| < 0.25 */
+ } else if (k < -2) { /* |x| < 0.25 */
y = __k_sinl(pi * fabsl(x), zero);
- else {
+ } else {
/* y = |4x|, z = floor(y), and n = (int)(z mod 8.0) */
y = 4.0L * fabsl(x);
+
if (k < PRECM2) {
z = y + twoPRECM2;
n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
t = z - twoPRECM2;
k = 0;
- if (t == y)
+
+ if (t == y) {
k = 1;
- else if (t > y) {
+ } else if (t > y) {
n -= 1;
t = quater + (y - t) * quater;
- }
- else
+ } else {
t = (y - t) * quater;
}
- else { /* k = Prec-3 */
+ } else { /* k = Prec-3 */
n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */
k = 1;
}
+
if (k) { /* x = N/4 */
if ((n & 1) != 0)
y = sqrth + tiny;
else
y = (n & 2) == 0 ? zero : one;
+
if ((n & 4) != 0)
y = -y;
- }
- else {
+ } else {
if ((n & 1) != 0)
t = quater - t;
+
if (((n + (n & 1)) & 2) == 0)
y = __k_sinl(pi * t, zero);
else
y = __k_cosl(pi * t, zero);
+
if ((n & 4) != 0)
y = -y;
}
}
- return hx >= 0 ? y : -y;
+
+ return (hx >= 0 ? y : -y);
}
+
#undef U
#undef LDBL_LEAST_SIGNIF_U
#undef I
#undef LDBL_MOST_SIGNIF_I