c99_functions.c (ccoshf, [...]): Fix errant minus.

2009-07-10  Steven G. Kargl  <kargl@gcc.gnu.org>

	* c99_functions.c (ccoshf, ccosh, ccoshl, ctanhf, ctanh, ctanl):
	Fix errant minus.

From-SVN: r149479

libgfortran/ChangeLog

+2009-07-10  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	* c99_functions.c (ccoshf, ccosh, ccoshl, ctanhf, ctanh, ctanl):
+	Fix errant minus.
+ 
 2009-07-08  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libfortran/40330

libgfortran/intrinsics/c99_functions.c

@@ -1165,7 +1165,7 @@ csinhl (long double complex a)
 #endif
 
 
-/* cosh(a + i b) = cosh(a) cos(b) - i sinh(a) sin(b)  */
+/* cosh(a + i b) = cosh(a) cos(b) + i sinh(a) sin(b)  */
 #if !defined(HAVE_CCOSHF)
 #define HAVE_CCOSHF 1
 float complex
@@ -1176,7 +1176,7 @@ ccoshf (float complex a)
 
   r = REALPART (a);
   i = IMAGPART (a);
-  COMPLEX_ASSIGN (v, coshf (r) * cosf (i), - (sinhf (r) * sinf (i)));
+  COMPLEX_ASSIGN (v, coshf (r) * cosf (i), sinhf (r) * sinf (i));
   return v;
 }
 #endif
@@ -1191,7 +1191,7 @@ ccosh (double complex a)
 
   r = REALPART (a);
   i = IMAGPART (a);
-  COMPLEX_ASSIGN (v, cosh (r) * cos (i), - (sinh (r) * sin (i)));
+  COMPLEX_ASSIGN (v, cosh (r) * cos (i),  sinh (r) * sin (i));
   return v;
 }
 #endif
@@ -1206,13 +1206,13 @@ ccoshl (long double complex a)
 
   r = REALPART (a);
   i = IMAGPART (a);
-  COMPLEX_ASSIGN (v, coshl (r) * cosl (i), - (sinhl (r) * sinl (i)));
+  COMPLEX_ASSIGN (v, coshl (r) * cosl (i), sinhl (r) * sinl (i));
   return v;
 }
 #endif
 
 
-/* tanh(a + i b) = (tanh(a) + i tan(b)) / (1 - i tanh(a) tan(b))  */
+/* tanh(a + i b) = (tanh(a) + i tan(b)) / (1 + i tanh(a) tan(b))  */
 #if !defined(HAVE_CTANHF)
 #define HAVE_CTANHF 1
 float complex
@@ -1224,7 +1224,7 @@ ctanhf (float complex a)
   rt = tanhf (REALPART (a));
   it = tanf (IMAGPART (a));
   COMPLEX_ASSIGN (n, rt, it);
-  COMPLEX_ASSIGN (d, 1, - (rt * it));
+  COMPLEX_ASSIGN (d, 1, rt * it);
 
   return n / d;
 }
@@ -1241,7 +1241,7 @@ ctanh (double complex a)
   rt = tanh (REALPART (a));
   it = tan (IMAGPART (a));
   COMPLEX_ASSIGN (n, rt, it);
-  COMPLEX_ASSIGN (d, 1, - (rt * it));
+  COMPLEX_ASSIGN (d, 1, rt * it);
 
   return n / d;
 }
@@ -1258,7 +1258,7 @@ ctanhl (long double complex a)
   rt = tanhl (REALPART (a));
   it = tanl (IMAGPART (a));
   COMPLEX_ASSIGN (n, rt, it);
-  COMPLEX_ASSIGN (d, 1, - (rt * it));
+  COMPLEX_ASSIGN (d, 1, rt * it);
 
   return n / d;
 }