Do not wrap expf and exp2f

The new generic expf and exp2f code don't need wrappers any more, they
set errno inline, so only use the wrappers on targets that need it.
(If the wrapper is needed, then the top level wrapper code is included,
otherwise empty w_exp*f.c is used to suppress the wrapper.)

A powerpc64 expf implementation includes the expf c code directly which
needed some changes.

2017-09-25  Szabolcs Nagy  <szabolcs.nagy@arm.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	* sysdeps/ieee754/flt-32/e_exp2f.c (__exp2f): Define without wrapper.
	* sysdeps/ieee754/flt-32/e_expf.c (__expf): Likewise
	* sysdeps/ieee754/flt-32/w_exp2f.c: New file.
	* sysdeps/ieee754/flt-32/w_expf.c: New file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c: Update for
	the new expf code.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/w_expf.c: New file.
	* sysdeps/powerpc/powerpc64/power8/fpu/w_expf.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_exp2f.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_expf.c: New file.
	* sysdeps/i386/fpu/w_exp2f.c: New file.
	* sysdeps/i386/fpu/w_expf.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/w_expf.c: New file.
	* sysdeps/x86_64/fpu/w_expf.c: New file.

13 files changed, 32 insertions, 8 deletions

diff --git a/sysdeps/i386/fpu/w_exp2f.c b/sysdeps/i386/fpu/w_exp2f.c
new file mode 100644
index 0000000000..583065d12a
--- /dev/null
+++ b/sysdeps/i386/fpu/w_exp2f.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_exp2f.c>
diff --git a/sysdeps/i386/fpu/w_expf.c b/sysdeps/i386/fpu/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/i386/fpu/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>
diff --git a/sysdeps/i386/i686/fpu/multiarch/w_expf.c b/sysdeps/i386/i686/fpu/multiarch/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/i386/i686/fpu/multiarch/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>
diff --git a/sysdeps/ieee754/flt-32/e_exp2f.c b/sysdeps/ieee754/flt-32/e_exp2f.c
index 72b7d8829f..31b660b07b 100644
--- a/sysdeps/ieee754/flt-32/e_exp2f.c
+++ b/sysdeps/ieee754/flt-32/e_exp2f.c
@@ -18,6 +18,7 @@
 
 #include <math.h>
 #include <stdint.h>
+#include <shlib-compat.h>
 #include "math_config.h"
 
 /*
@@ -42,7 +43,7 @@ top12 (float x)
 }
 
 float
-__ieee754_exp2f (float x)
+__exp2f (float x)
 {
   uint32_t abstop;
   uint64_t ki, t;
@@ -85,4 +86,8 @@ __ieee754_exp2f (float x)
   y = y * s;
   return (float) y;
 }
-strong_alias (__ieee754_exp2f, __exp2f_finite)
+#ifndef __exp2f
+strong_alias (__exp2f, __ieee754_exp2f)
+strong_alias (__exp2f, __exp2f_finite)
+versioned_symbol (libm, __exp2f, exp2f, GLIBC_2_27);
+#endif
diff --git a/sysdeps/ieee754/flt-32/e_expf.c b/sysdeps/ieee754/flt-32/e_expf.c
index 12239e1862..74a383a02c 100644
--- a/sysdeps/ieee754/flt-32/e_expf.c
+++ b/sysdeps/ieee754/flt-32/e_expf.c
@@ -16,8 +16,14 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#ifdef __expf
+# undef libm_hidden_proto
+# define libm_hidden_proto(ignored)
+#endif
+
 #include <math.h>
 #include <stdint.h>
+#include <shlib-compat.h>
 #include "math_config.h"
 
 /*
@@ -42,7 +48,7 @@ top12 (float x)
 }
 
 float
-__ieee754_expf (float x)
+__expf (float x)
 {
   uint32_t abstop;
   uint64_t ki, t;
@@ -99,4 +105,10 @@ __ieee754_expf (float x)
   y = y * s;
   return (float) y;
 }
-strong_alias (__ieee754_expf, __expf_finite)
+
+#ifndef __expf
+hidden_def (__expf)
+strong_alias (__expf, __ieee754_expf)
+strong_alias (__expf, __expf_finite)
+versioned_symbol (libm, __expf, expf, GLIBC_2_27);
+#endif
diff --git a/sysdeps/ieee754/flt-32/w_exp2f.c b/sysdeps/ieee754/flt-32/w_exp2f.c
new file mode 100644
index 0000000000..1cc8931700
--- /dev/null
+++ b/sysdeps/ieee754/flt-32/w_exp2f.c
@@ -0,0 +1 @@
+/* Not needed.  */
diff --git a/sysdeps/ieee754/flt-32/w_expf.c b/sysdeps/ieee754/flt-32/w_expf.c
new file mode 100644
index 0000000000..1cc8931700
--- /dev/null
+++ b/sysdeps/ieee754/flt-32/w_expf.c
@@ -0,0 +1 @@
+/* Not needed.  */
diff --git a/sysdeps/m68k/m680x0/fpu/w_exp2f.c b/sysdeps/m68k/m680x0/fpu/w_exp2f.c
new file mode 100644
index 0000000000..583065d12a
--- /dev/null
+++ b/sysdeps/m68k/m680x0/fpu/w_exp2f.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_exp2f.c>
diff --git a/sysdeps/m68k/m680x0/fpu/w_expf.c b/sysdeps/m68k/m680x0/fpu/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/m68k/m680x0/fpu/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c
index b236290ea2..2cd9a5ec8b 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c
@@ -16,9 +16,6 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#undef strong_alias
-#define strong_alias(a, b)
-
-#define __ieee754_expf __ieee754_expf_ppc64
+#define __expf __ieee754_expf_ppc64
 
 #include <sysdeps/ieee754/flt-32/e_expf.c>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/w_expf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>
diff --git a/sysdeps/powerpc/powerpc64/power8/fpu/w_expf.c b/sysdeps/powerpc/powerpc64/power8/fpu/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/fpu/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>
diff --git a/sysdeps/x86_64/fpu/w_expf.c b/sysdeps/x86_64/fpu/w_expf.c
new file mode 100644
index 0000000000..b5fe164520
--- /dev/null
+++ b/sysdeps/x86_64/fpu/w_expf.c
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_expf.c>