[PATCH 09/14] ldbl-128ibm-compat: Add regular character scanning functions

["Gabriel F. T. Gomes" <gabriel at inconstante dot eti dot br>]

The 'mode' argument to __vfscanf_internal allows the selection of the
long double format for all long double arguments requested by the format
string.  Currently, there are two possibilities: long double with the
same format as double or long double as something else.  The 'something
else' format varies between architectures, and on powerpc64le, it means
IBM Extended Precision format.

In preparation for the third option of long double format on
powerpc64le, this patch uses the new mode mask,
SCANF_LDBL_USES_FLOAT128, which tells __vfscanf_internal to call
__strtof128_internal, instead of __strtold_internal, and save the output
into a _Float128 variable.

Tested for powerpc64le.

	* sysdeps/ieee754/ldbl-128ibm-compat/Makefile (routines): Add
	ieee128-fscanf, ieee128-scanf, ieee128-sscanf, ieee128-vfscanf,
	ieee128-vscanf, and ieee128-vsscanf.
	(CFLAGS-vfscanf-internal.c): Add -mfloat128 to the compiler
	command used to build vfscanf-internal.c.  This is needed to
	extend __vfscanf_internal with the support to redirect the call
	to __strtold_internal to __strtof128_internal.
	(tests-internal): Add test-scanf-ieee128 and test-scanf-ibm128.
	(CFLAGS-test-scanf-ieee128.c): New variable.
	(CFLAGS-test-scanf-ibm128.c): Likewise.
	($(objpfx)test-scanf-ieee128): Link the loader after libgcc.
	[run-built-tests] (tests-special): Add
	$(objpfx)test-scanf-ieee128.out and
	$(objpfx)test-scanf-ibm128.out.
	($(objpfx)test-scanf-ieee128.out): New build and run rule.
	($(objpfx)test-scanf-ibm128.out): Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/Versions (libc): Add
	__fscanfieee128, __scanfieee128, __sscanfieee128,
	__vfscanfieee128, __vscanfieee128, and __vsscanfieee128.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fscanf.c: New file.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sscanf.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vscanf.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ieee128.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat-template.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh:
	Likewise.
---
 sysdeps/ieee754/ldbl-128ibm-compat/Makefile        |  35 +++++-
 sysdeps/ieee754/ldbl-128ibm-compat/Versions        |   8 ++
 .../ieee754/ldbl-128ibm-compat/ieee128-fscanf.c    |  34 ++++++
 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c |  34 ++++++
 .../ieee754/ldbl-128ibm-compat/ieee128-sscanf.c    |  38 +++++++
 .../ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c   |  26 +++++
 .../ieee754/ldbl-128ibm-compat/ieee128-vscanf.c    |  26 +++++
 .../ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c   |  29 +++++
 .../ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c |   1 +
 .../ldbl-128ibm-compat/test-scanf-ieee128.c        |   1 +
 .../test-scanf-ldbl-compat-template.c              | 117 +++++++++++++++++++++
 .../ldbl-128ibm-compat/test-scanf-ldbl-compat.c    |  10 ++
 .../ldbl-128ibm-compat/test-scanf-ldbl-compat.sh   |  63 +++++++++++
 13 files changed, 420 insertions(+), 2 deletions(-)
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fscanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sscanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vscanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ieee128.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat-template.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.c
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh

diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
index 88cb36576b..10fd6bbffc 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
@@ -45,12 +45,22 @@ routines += ieee128-vfwprintf_chk
 routines += ieee128-vswprintf_chk
 routines += ieee128-vwprintf_chk
 
+routines += ieee128-fscanf
+routines += ieee128-scanf
+routines += ieee128-sscanf
+
+routines += ieee128-vfscanf
+routines += ieee128-vscanf
+routines += ieee128-vsscanf
+
 # Printing long double values with IEEE binary128 format reuses part
 # of the internal float128 implementation (__printf_fp, __printf_fphex,
-# and __float128 variables and union members).  Thus, the compilation of
-# the following functions, must have -mfloat128 passed to the compiler.
+# and __float128 variables and union members).  Likewise, reading these
+# values reuses __strtof128_internal.  Thus, the compilation of the
+# following functions, must have -mfloat128 passed to the compiler.
 CFLAGS-vfprintf-internal.c += -mfloat128
 CFLAGS-vfwprintf-internal.c += -mfloat128
+CFLAGS-vfscanf-internal.c += -mfloat128
 
 # Basic tests for the implementation of long double with IEEE binary128
 # format and for the related redirections in installed headers.
@@ -70,6 +80,12 @@ tests-internal += test-wprintf-chk-ieee128 test-wprintf-chk-ibm128
 CFLAGS-test-wprintf-chk-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 CFLAGS-test-wprintf-chk-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
 
+tests-internal += test-scanf-ieee128 test-scanf-ibm128
+CFLAGS-test-scanf-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-scanf-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+$(objpfx)test-scanf-ieee128: gnulib-tests += $(f128-loader-link)
+
 ifeq ($(run-built-tests),yes)
 tests-special += $(objpfx)test-printf-ieee128.out
 tests-special += $(objpfx)test-printf-ibm128.out
@@ -82,6 +98,9 @@ tests-special += $(objpfx)test-printf-chk-ibm128.out
 
 tests-special += $(objpfx)test-wprintf-chk-ieee128.out
 tests-special += $(objpfx)test-wprintf-chk-ibm128.out
+
+tests-special += $(objpfx)test-scanf-ieee128.out
+tests-special += $(objpfx)test-scanf-ibm128.out
 endif
 
 $(objpfx)test-printf-ieee128.out: \
@@ -131,4 +150,16 @@ $(objpfx)test-wprintf-chk-ibm128.out: \
   $(objpfx)test-wprintf-chk-ibm128
 	$(SHELL) $^ '$(test-program-prefix)' $@; \
 	$(evaluate-test)
+
+$(objpfx)test-scanf-ieee128.out: \
+  ../sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh \
+  $(objpfx)test-scanf-ieee128
+	$(SHELL) $^ '$(test-program-prefix)' $@; \
+	$(evaluate-test)
+
+$(objpfx)test-scanf-ibm128.out: \
+  ../sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh \
+  $(objpfx)test-scanf-ibm128
+	$(SHELL) $^ '$(test-program-prefix)' $@; \
+	$(evaluate-test)
 endif
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Versions b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
index 583c05cca7..26cb9aa692 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Versions
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
@@ -156,5 +156,13 @@ libc {
     __vfwprintf_chkieee128;
     __vswprintf_chkieee128;
     __vwprintf_chkieee128;
+
+    __fscanfieee128;
+    __scanfieee128;
+    __sscanfieee128;
+
+    __vfscanfieee128;
+    __vscanfieee128;
+    __vsscanfieee128;
   }
 }
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fscanf.c
new file mode 100644
index 0000000000..f51e822094
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-fscanf.c
@@ -0,0 +1,34 @@
+/* Wrapper for fscanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_fscanf (FILE *fp, const char *format, ...)
+{
+  va_list arg;
+  int done;
+
+  va_start (arg, format);
+  done = __vfscanf_internal (fp, format, arg, SCANF_LDBL_USES_FLOAT128);
+  va_end (arg);
+
+  return done;
+}
+strong_alias (___ieee128_fscanf, __fscanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c
new file mode 100644
index 0000000000..571cf7d75d
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-scanf.c
@@ -0,0 +1,34 @@
+/* Wrapper for scanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <libio/libioP.h>
+
+extern int
+___ieee128_scanf (const char *format, ...)
+{
+  va_list arg;
+  int done;
+
+  va_start (arg, format);
+  done = __vfscanf_internal (stdin, format, arg, SCANF_LDBL_USES_FLOAT128);
+  va_end (arg);
+
+  return done;
+}
+strong_alias (___ieee128_scanf, __scanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sscanf.c
new file mode 100644
index 0000000000..7c932955f6
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-sscanf.c
@@ -0,0 +1,38 @@
+/* Wrapper for sscanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <strfile.h>
+#include <libioP.h>
+
+extern int
+___ieee128_sscanf (const char *string, const char *format, ...)
+{
+  va_list arg;
+  int done;
+
+  _IO_strfile sf;
+  FILE *fp = _IO_strfile_read (&sf, string);
+
+  va_start (arg, format);
+  done = __vfscanf_internal (fp, format, arg, SCANF_LDBL_USES_FLOAT128);
+  va_end (arg);
+
+  return done;
+}
+strong_alias (___ieee128_sscanf, __sscanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c
new file mode 100644
index 0000000000..d6654e05f5
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vfscanf.c
@@ -0,0 +1,26 @@
+/* Wrapper for vfscanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vfscanf (FILE *fp, const char *format, va_list ap)
+{
+  return __vfscanf_internal (fp, format, ap, SCANF_LDBL_USES_FLOAT128);
+}
+strong_alias (___ieee128_vfscanf, __vfscanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vscanf.c
new file mode 100644
index 0000000000..5780c062bb
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vscanf.c
@@ -0,0 +1,26 @@
+/* Wrapper for vscanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libio/libioP.h>
+
+extern int
+___ieee128_vscanf (const char *format, va_list ap)
+{
+  return __vfscanf_internal (stdin, format, ap, SCANF_LDBL_USES_FLOAT128);
+}
+strong_alias (___ieee128_vscanf, __vscanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c
new file mode 100644
index 0000000000..8ff43a95c2
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-vsscanf.c
@@ -0,0 +1,29 @@
+/* Wrapper for vsscanf.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <strfile.h>
+#include <libioP.h>
+
+extern int
+___ieee128_vsscanf (const char *string, const char *format, va_list ap)
+{
+  _IO_strfile sf;
+  FILE *fp = _IO_strfile_read (&sf, string);
+  return __vfscanf_internal (fp, format, ap, SCANF_LDBL_USES_FLOAT128);
+}
+strong_alias (___ieee128_vsscanf, __vsscanfieee128)
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c
new file mode 100644
index 0000000000..8cdee601f2
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ibm128.c
@@ -0,0 +1 @@
+#include <test-scanf-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ieee128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ieee128.c
new file mode 100644
index 0000000000..8cdee601f2
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ieee128.c
@@ -0,0 +1 @@
+#include <test-scanf-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat-template.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat-template.c
new file mode 100644
index 0000000000..f766897da4
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat-template.c
@@ -0,0 +1,117 @@
+/* Test for the long double variants of *scanf functions.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+
+#include <support/check.h>
+
+#define CLEAR								\
+  va_start (args, format);						\
+  ld = va_arg (args, long double *);					\
+  *ld = 0;								\
+  va_end (args);
+
+#define CLEAR_VALUE value = 0;
+
+#define CHECK								\
+  va_start (args, format);						\
+  ld = va_arg (args, long double *);					\
+  va_end (args);							\
+  if (*ld == -1)							\
+    printf ("OK");							\
+  else									\
+    printf ("ERROR (%.60Lf)", *ld);					\
+  printf ("\n");
+
+#define CHECK_VALUE							\
+  if (value == -1)							\
+    printf ("OK");							\
+  else									\
+    printf ("ERROR (%.60Lf)", value);					\
+  printf ("\n");
+
+static void
+do_test_call (FILE *stream, CHAR *string, const CHAR *format, ...)
+{
+  long double value;
+  long double *ld;
+  va_list args;
+
+  CLEAR_VALUE
+  printf ("fscanf: ");
+  FSCANF (stream, format, &value);
+  CHECK_VALUE
+
+  CLEAR_VALUE
+  printf ("scanf: ");
+  SCANF (format, &value);
+  CHECK_VALUE
+
+  CLEAR_VALUE
+  printf ("sscanf: ");
+  SSCANF (string, format, &value);
+  CHECK_VALUE
+
+  CLEAR
+  printf ("vfscanf: ");
+  va_start (args, format);
+  VFSCANF (stream, format, args);
+  va_end (args);
+  CHECK
+
+  CLEAR
+  printf ("vscanf: ");
+  va_start (args, format);
+  VSCANF (format, args);
+  va_end (args);
+  CHECK
+
+  CLEAR
+  printf ("vsscanf: ");
+  va_start (args, format);
+  VSSCANF (string, format, args);
+  va_end (args);
+  CHECK
+}
+
+static int
+do_test (void)
+{
+  CHAR string[256];
+  long double ld;
+
+  /* Scan in decimal notation.  */
+  STRCPY (string,
+	  L ("-1.0\n")
+	  L ("-1.0\n") );
+  do_test_call (stdin, string, L("%Lf"), &ld);
+
+  /* Scan in hexadecimal notation.  */
+  STRCPY (string,
+	  L ("-0x1.0p+0\n")
+	  L ("-0x1.0p+0\n") );
+  do_test_call (stdin, string, L("%La"), &ld);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.c
new file mode 100644
index 0000000000..0759d8afab
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.c
@@ -0,0 +1,10 @@
+#define CHAR char
+#define L(x) x
+#define FSCANF fscanf
+#define SSCANF sscanf
+#define SCANF scanf
+#define VFSCANF vfscanf
+#define VSSCANF vsscanf
+#define VSCANF vscanf
+#define STRCPY strcpy
+#include <test-scanf-ldbl-compat-template.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh
new file mode 100644
index 0000000000..822b4c3607
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-scanf-ldbl-compat.sh
@@ -0,0 +1,63 @@
+#!/bin/sh
+# Testing of *scanf.  IEEE binary128 for powerpc64le version.
+# Copyright (C) 2018 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+set -e
+
+test_program=$1; shift
+test_program_prefix=$1; shift
+test_program_output=$1; shift
+
+status=0
+
+cat <<'EOF' |
+-1.000000000000000000000000000000000000000000000000000000000000
+-1.000000000000000000000000000000000000000000000000000000000000
+-1.000000000000000000000000000000000000000000000000000000000000
+-1.000000000000000000000000000000000000000000000000000000000000
+-0x1.000000000000000000000000000000000000000000000000000000000000p+0
+-0x1.000000000000000000000000000000000000000000000000000000000000p+0
+-0x1.000000000000000000000000000000000000000000000000000000000000p+0
+-0x1.000000000000000000000000000000000000000000000000000000000000p+0
+EOF
+${test_program_prefix} \
+  ${test_program} \
+  - \
+  > ${test_program_output} || status=1
+
+cat <<'EOF' |
+fscanf: OK
+scanf: OK
+sscanf: OK
+vfscanf: OK
+vscanf: OK
+vsscanf: OK
+fscanf: OK
+scanf: OK
+sscanf: OK
+vfscanf: OK
+vscanf: OK
+vsscanf: OK
+EOF
+cmp - ${test_program_output} > /dev/null 2>&1 ||
+{
+  status=1
+  echo "*** output comparison failed"
+}
+
+exit $status
-- 
2.14.4