Use copysign functions not __copysign functions in glibc libm.

Continuing the move to use, within libm, public names for libm
functions that can be inlined as built-in functions on many
architectures, this patch moves calls to __copysign functions to call
the corresponding copysign names instead, with asm redirection to
__copysign when the calls are not inlined (all cases are inlined
except for IBM long double for powerpc soft-float / e500v1).  This
eliminates the need for an inline function defining __copysign in
terms of __builtin_copysign.

Tested for x86_64, and with build-many-glibcs.py.

	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT]
	(MATH_REDIRECT_BINARY_ARGS): New macro.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (copysign): Redirect using MATH_REDIRECT.
	* sysdeps/alpha/fpu/s_copysign.c: Define NO_MATH_REDIRECT before
	header inclusion.
	* sysdeps/alpha/fpu/s_copysignf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_copysign.c: Likewise.
	* sysdeps/ieee754/float128/s_copysignf128.c: Likewise.
	* sysdeps/ieee754/flt-32/s_copysignf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_copysignl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_copysignl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_copysignl.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_copysign.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_copysignf.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_copysign.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_copysignf.c: Likewise.
	* sysdeps/riscv/rvd/s_copysign.c: Likewise.
	* sysdeps/riscv/rvf/s_copysignf.c: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.c:
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysignf.c:
	Likewise.
	* sysdeps/generic/math_private_calls.h
	[!__MATH_DECLARING_LONG_DOUBLE || !NO_LONG_DOUBLE] (__copysign):
	Do not declare and define as an inline function.
	* math/divtc3.c (__divtc3): Use copysign functions instead of
	__copysign variants.
	* math/multc3.c (__multc3): Likewise.
	* sysdeps/generic/math-type-macros.h (M_COPYSIGN): Likewise.
	* sysdeps/ieee754/dbl-64/e_atan2.c (signArctan2): Likewise.
	* sysdeps/ieee754/dbl-64/e_atanh.c (__ieee754_atanh): Likewise.
	* sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r):
	Likewise.
	* sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise.
	(__ieee754_yn): Likewise.
	* sysdeps/ieee754/dbl-64/s_asinh.c (__asinh): Likewise.
	* sysdeps/ieee754/dbl-64/s_atan.c (__signArctan): Likewise.
	* sysdeps/ieee754/dbl-64/s_scalbln.c (__scalbln): Likewise.
	* sysdeps/ieee754/dbl-64/s_scalbn.c (__scalbn): Likewise.
	* sysdeps/ieee754/dbl-64/s_sin.c (do_sin): Likewise.
	(__sin): Likewise.
	* sysdeps/ieee754/dbl-64/s_sincos.c (__sincos): Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c (__nearbyint):
	Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbln.c (__scalbln):
	Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (__scalbn):
	Likewise.
	* sysdeps/ieee754/flt-32/e_atanhf.c (__ieee754_atanhf): Likewise.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r):
	Likewise.
	* sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise.
	(__ieee754_ynf): Likewise.
	* sysdeps/ieee754/flt-32/s_asinhf.c (__asinhf): Likewise.
	* sysdeps/ieee754/flt-32/s_scalbnf.c (__scalbnf): Likewise.
	* sysdeps/ieee754/k_standard.c (__kernel_standard): Likewise.
	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise.
	(__ieee754_ynl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_scalblnl.c (__scalblnl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_scalbnl.c (__scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise.
	(__ieee754_ynl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fmal.c (__fmal): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c (__scalblnl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (__scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise.
	(__ieee754_ynl)
	* sysdeps/ieee754/ldbl-96/s_asinhl.c (__asinhl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_scalblnl.c (__scalblnl): Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-copysign.c (copysignl): Likewise.
	* sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Likewise.
	* sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise.

57 files changed, 202 insertions, 110 deletions

diff --git a/ChangeLog b/ChangeLog
index 4e438c88c4..0af91b490d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,89 @@
 2018-09-27  Joseph Myers  <joseph@codesourcery.com>
 
 	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
+	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT]
+	(MATH_REDIRECT_BINARY_ARGS): New macro.
+	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
+	&& !NO_MATH_REDIRECT] (copysign): Redirect using MATH_REDIRECT.
+	* sysdeps/alpha/fpu/s_copysign.c: Define NO_MATH_REDIRECT before
+	header inclusion.
+	* sysdeps/alpha/fpu/s_copysignf.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_copysign.c: Likewise.
+	* sysdeps/ieee754/float128/s_copysignf128.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_copysignf.c: Likewise.
+	* sysdeps/ieee754/ldbl-128/s_copysignl.c: Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_copysignl.c: Likewise.
+	* sysdeps/ieee754/ldbl-96/s_copysignl.c: Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_copysign.c:
+	Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_copysignf.c:
+	Likewise.
+	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_copysign.c: Likewise.
+	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_copysignf.c: Likewise.
+	* sysdeps/riscv/rvd/s_copysign.c: Likewise.
+	* sysdeps/riscv/rvf/s_copysignf.c: Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.c:
+	Likewise.
+	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysignf.c:
+	Likewise.
+	* sysdeps/generic/math_private_calls.h
+	[!__MATH_DECLARING_LONG_DOUBLE || !NO_LONG_DOUBLE] (__copysign):
+	Do not declare and define as an inline function.
+	* math/divtc3.c (__divtc3): Use copysign functions instead of
+	__copysign variants.
+	* math/multc3.c (__multc3): Likewise.
+	* sysdeps/generic/math-type-macros.h (M_COPYSIGN): Likewise.
+	* sysdeps/ieee754/dbl-64/e_atan2.c (signArctan2): Likewise.
+	* sysdeps/ieee754/dbl-64/e_atanh.c (__ieee754_atanh): Likewise.
+	* sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r):
+	Likewise.
+	* sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise.
+	(__ieee754_yn): Likewise.
+	* sysdeps/ieee754/dbl-64/s_asinh.c (__asinh): Likewise.
+	* sysdeps/ieee754/dbl-64/s_atan.c (__signArctan): Likewise.
+	* sysdeps/ieee754/dbl-64/s_scalbln.c (__scalbln): Likewise.
+	* sysdeps/ieee754/dbl-64/s_scalbn.c (__scalbn): Likewise.
+	* sysdeps/ieee754/dbl-64/s_sin.c (do_sin): Likewise.
+	(__sin): Likewise.
+	* sysdeps/ieee754/dbl-64/s_sincos.c (__sincos): Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c (__nearbyint):
+	Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbln.c (__scalbln):
+	Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (__scalbn):
+	Likewise.
+	* sysdeps/ieee754/flt-32/e_atanhf.c (__ieee754_atanhf): Likewise.
+	* sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r):
+	Likewise.
+	* sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise.
+	(__ieee754_ynf): Likewise.
+	* sysdeps/ieee754/flt-32/s_asinhf.c (__asinhf): Likewise.
+	* sysdeps/ieee754/flt-32/s_scalbnf.c (__scalbnf): Likewise.
+	* sysdeps/ieee754/k_standard.c (__kernel_standard): Likewise.
+	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise.
+	(__ieee754_ynl): Likewise.
+	* sysdeps/ieee754/ldbl-128/s_scalblnl.c (__scalblnl): Likewise.
+	* sysdeps/ieee754/ldbl-128/s_scalbnl.c (__scalbnl): Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise.
+	(__ieee754_ynl): Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_fmal.c (__fmal): Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c (__scalblnl): Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (__scalbnl): Likewise.
+	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise.
+	(__ieee754_ynl)
+	* sysdeps/ieee754/ldbl-96/s_asinhl.c (__asinhl): Likewise.
+	* sysdeps/ieee754/ldbl-96/s_scalblnl.c (__scalblnl): Likewise.
+	* sysdeps/ieee754/ldbl-opt/nldbl-copysign.c (copysignl): Likewise.
+	* sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Likewise.
+	* sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise.
+
+	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
 	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (round): Redirect
 	using MATH_REDIRECT.
 	* sysdeps/aarch64/fpu/s_round.c: Define NO_MATH_REDIRECT before
diff --git a/include/math.h b/include/math.h
index ca9a1f0cd6..79ebbae359 100644
--- a/include/math.h
+++ b/include/math.h
@@ -100,12 +100,14 @@ fabsf128 (_Float128 x)
 #    define MATH_REDIRECT_F128(FUNC, PREFIX, ARGS)
 #   endif
 #   define MATH_REDIRECT_UNARY_ARGS(TYPE) TYPE
+#   define MATH_REDIRECT_BINARY_ARGS(TYPE) TYPE, TYPE
 MATH_REDIRECT (sqrt, "__ieee754_", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (ceil, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (floor, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (rint, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (trunc, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (round, "__", MATH_REDIRECT_UNARY_ARGS)
+MATH_REDIRECT (copysign, "__", MATH_REDIRECT_BINARY_ARGS)
 #  endif
 # endif
 
diff --git a/math/divtc3.c b/math/divtc3.c
index b1df88bdb7..e83feca837 100644
--- a/math/divtc3.c
+++ b/math/divtc3.c
@@ -51,22 +51,22 @@ __divtc3 (long double a, long double b, long double c, long double d)
     {
       if (denom == 0.0 && (!isnan (a) || !isnan (b)))
 	{
-	  x = __copysignl (INFINITY, c) * a;
-	  y = __copysignl (INFINITY, c) * b;
+	  x = copysignl (INFINITY, c) * a;
+	  y = copysignl (INFINITY, c) * b;
 	}
       else if ((isinf (a) || isinf (b))
 	       && isfinite (c) && isfinite (d))
 	{
-	  a = __copysignl (isinf (a) ? 1 : 0, a);
-	  b = __copysignl (isinf (b) ? 1 : 0, b);
+	  a = copysignl (isinf (a) ? 1 : 0, a);
+	  b = copysignl (isinf (b) ? 1 : 0, b);
 	  x = INFINITY * (a * c + b * d);
 	  y = INFINITY * (b * c - a * d);
 	}
       else if ((isinf (c) || isinf (d))
 	       && isfinite (a) && isfinite (b))
 	{
-	  c = __copysignl (isinf (c) ? 1 : 0, c);
-	  d = __copysignl (isinf (d) ? 1 : 0, d);
+	  c = copysignl (isinf (c) ? 1 : 0, c);
+	  d = copysignl (isinf (d) ? 1 : 0, d);
 	  x = 0.0 * (a * c + b * d);
 	  y = 0.0 * (b * c - a * d);
 	}
diff --git a/math/multc3.c b/math/multc3.c
index 9943d705fd..775cbfbcce 100644
--- a/math/multc3.c
+++ b/math/multc3.c
@@ -42,20 +42,20 @@ __multc3 (long double a, long double b, long double c, long double d)
 	{
 	  /* z is infinite.  "Box" the infinity and change NaNs in
 	     the other factor to 0.  */
-	  a = __copysignl (isinf (a) ? 1 : 0, a);
-