S390: Use s390-64 specific ionv-modules on s390-32, too.

This patch reworks the existing s390 64bit specific iconv modules in order
to use them on s390 31bit, too.

Thus the parts for subdirectory iconvdata in sysdeps/s390/s390-64/Makefile
were moved to sysdeps/s390/Makefile so that they apply on 31bit, too.
All those modules are moved from sysdeps/s390/s390-64 directory to sysdeps/s390.

The iso-8859-1 to/from cp037 module was adjusted, to use brct (branch relative
on count) instruction on 31bit s390 instead of brctg, because the brctg is a
zarch instruction and is not available on a 31bit kernel.

The utf modules are using zarch instructions, thus the directive machinemode
zarch_nohighgprs was added to the inline assemblies to omit the high-gprs flag
in the shared libraries. Otherwise they can't be loaded on a 31bit kernel.
The ifunc resolvers were adjusted in order to call the etf3eh or vector variants
only if zarch instructions are available (64bit kernel in 31bit compat-mode).
Furthermore some variable types were changed. E.g. unsigned long long would be
a register pair on s390 31bit, but we want only one single register.
For variables of type size_t the register contents have to be enlarged from a
32bit to a 64bit value on 31bit, because the inline assemblies uses 64bit values
in such cases.

ChangeLog:

	* sysdeps/s390/s390-64/Makefile (iconvdata-subdirectory):
	Move to ...
	* sysdeps/s390/Makefile: ... here.
	* sysdeps/s390/s390-64/iso-8859-1_cp037_z900.c: Move to ...
	* sysdeps/s390/iso-8859-1_cp037_z900.c: ... here.
	(BRANCH_ON_COUNT): New define.
	(TR_LOOP): Use BRANCH_ON_COUNT instead of brctg.
	* sysdeps/s390/s390-64/utf16-utf32-z9.c: Move to ...
	* sysdeps/s390/utf16-utf32-z9.c: ... here and adjust to
	run on s390-32, too.
	* sysdeps/s390/s390-64/utf8-utf16-z9.c: Move to ...
	* sysdeps/s390/utf8-utf16-z9.c: ... here and adjust to
	run on s390-32, too.
	* sysdeps/s390/s390-64/utf8-utf32-z9.c: Move to ...
	* sysdeps/s390/utf8-utf32-z9.c: ... here and adjust to
	run on s390-32, too.

1 files changed, 636 insertions, 0 deletions

diff --git a/sysdeps/s390/utf16-utf32-z9.c b/sysdeps/s390/utf16-utf32-z9.c
new file mode 100644
index 0000000000..8d42ab8b0e
--- /dev/null
+++ b/sysdeps/s390/utf16-utf32-z9.c
@@ -0,0 +1,636 @@
+/* Conversion between UTF-16 and UTF-32 BE/internal.
+
+   This module uses the Z9-109 variants of the Convert Unicode
+   instructions.
+   Copyright (C) 1997-2016 Free Software Foundation, Inc.
+
+   Author: Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+   Based on the work by Ulrich Drepper  <drepper@cygnus.com>, 1997.
+
+   Thanks to Daniel Appich who covered the relevant performance work
+   in his diploma thesis.
+
+   This 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.
+
+   This 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 <dlfcn.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <dl-procinfo.h>
+#include <gconv.h>
+
+#if defined HAVE_S390_VX_GCC_SUPPORT
+# define ASM_CLOBBER_VR(NR) , NR
+#else
+# define ASM_CLOBBER_VR(NR)
+#endif
+
+#if defined __s390x__
+# define CONVERT_32BIT_SIZE_T(REG)
+#else
+# define CONVERT_32BIT_SIZE_T(REG) "llgfr %" #REG ",%" #REG "\n\t"
+#endif
+
+/* UTF-32 big endian byte order mark.  */
+#define BOM_UTF32               0x0000feffu
+
+/* UTF-16 big endian byte order mark.  */
+#define BOM_UTF16               0xfeff
+
+#define DEFINE_INIT		0
+#define DEFINE_FINI		0
+#define MIN_NEEDED_FROM		2
+#define MAX_NEEDED_FROM		4
+#define MIN_NEEDED_TO		4
+#define FROM_LOOP		__from_utf16_loop
+#define TO_LOOP			__to_utf16_loop
+#define FROM_DIRECTION		(dir == from_utf16)
+#define ONE_DIRECTION           0
+
+/* Direction of the transformation.  */
+enum direction
+{
+  illegal_dir,
+  to_utf16,
+  from_utf16
+};
+
+struct utf16_data
+{
+  enum direction dir;
+  int emit_bom;
+};
+
+
+extern int gconv_init (struct __gconv_step *step);
+int
+gconv_init (struct __gconv_step *step)
+{
+  /* Determine which direction.  */
+  struct utf16_data *new_data;
+  enum direction dir = illegal_dir;
+  int emit_bom;
+  int result;
+
+  emit_bom = (__strcasecmp (step->__to_name, "UTF-32//") == 0
+	      || __strcasecmp (step->__to_name, "UTF-16//") == 0);
+
+  if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0
+      && (__strcasecmp (step->__to_name, "UTF-32//") == 0
+	  || __strcasecmp (step->__to_name, "UTF-32BE//") == 0
+	  || __strcasecmp (step->__to_name, "INTERNAL") == 0))
+    {
+      dir = from_utf16;
+    }
+  else if ((__strcasecmp (step->__to_name, "UTF-16//") == 0
+	    || __strcasecmp (step->__to_name, "UTF-16BE//") == 0)
+	   && (__strcasecmp (step->__from_name, "UTF-32BE//") == 0
+	       || __strcasecmp (step->__from_name, "INTERNAL") == 0))
+    {
+      dir = to_utf16;
+    }
+
+  result = __GCONV_NOCONV;
+  if (dir != illegal_dir)
+    {
+      new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data));
+
+      result = __GCONV_NOMEM;
+      if (new_data != NULL)
+	{
+	  new_data->dir = dir;
+	  new_data->emit_bom = emit_bom;
+	  step->__data = new_data;
+
+	  if (dir == from_utf16)
+	    {
+	      step->__min_needed_from = MIN_NEEDED_FROM;
+	      step->__max_needed_from = MIN_NEEDED_FROM;
+	      step->__min_needed_to = MIN_NEEDED_TO;
+	      step->__max_needed_to = MIN_NEEDED_TO;
+	    }
+	  else
+	    {
+	      step->__min_needed_from = MIN_NEEDED_TO;
+	      step->__max_needed_from = MIN_NEEDED_TO;
+	      step->__min_needed_to = MIN_NEEDED_FROM;
+	      step->__max_needed_to = MIN_NEEDED_FROM;
+	    }
+
+	  step->__stateful = 0;
+
+	  result = __GCONV_OK;
+	}
+    }
+
+  return result;
+}
+
+
+extern void gconv_end (struct __gconv_step *data);
+void
+gconv_end (struct __gconv_step *data)
+{
+  free (data->__data);
+}
+
+/* The macro for the hardware loop.  This is used for both
+   directions.  */
+#define HARDWARE_CONVERT(INSTRUCTION)					\
+  {									\
+    register const unsigned char* pInput __asm__ ("8") = inptr;		\
+    register size_t inlen __asm__ ("9") = inend - inptr;		\
+    register unsigned char* pOutput __asm__ ("10") = outptr;		\
+    register size_t outlen __asm__("11") = outend - outptr;		\
+    unsigned long cc = 0;						\
+									\
+    __asm__ __volatile__ (".machine push       \n\t"			\
+			  ".machine \"z9-109\" \n\t"			\
+			  ".machinemode \"zarch_nohighgprs\"\n\t"	\
+			  "0: " INSTRUCTION "  \n\t"			\
+			  ".machine pop        \n\t"			\
+			  "   jo     0b        \n\t"			\
+			  "   ipm    %2        \n"			\
+			  : "+a" (pOutput), "+a" (pInput), "+d" (cc),	\
+			    "+d" (outlen), "+d" (inlen)			\
+			  :						\
+			  : "cc", "memory");				\
+									\
+    inptr = pInput;							\
+    outptr = pOutput;							\
+    cc >>= 28;								\
+									\
+    if (cc == 1)							\
+      {									\
+	result = __GCONV_FULL_OUTPUT;					\
+      }									\
+    else if (cc == 2)							\
+      {									\
+	result = __GCONV_ILLEGAL_INPUT;					\
+      }									\
+  }
+
+#define PREPARE_LOOP							\
+  enum direction dir = ((struct utf16_data *) step->__data)->dir;	\
+  int emit_bom = ((struct utf16_data *) step->__data)->emit_bom;	\
+									\
+  if (emit_bom && !data->__internal_use					\
+      && data->__invocation_counter == 0)				\
+    {									\
+      if (dir == to_utf16)						\
+	{								\
+	  /* Emit the UTF-16 Byte Order Mark.  */			\
+	  if (__glibc_unlikely (outbuf + 2 > outend))			\
+	    return __GCONV_FULL_OUTPUT;					\
+									\
+	  put16u (outbuf, BOM_UTF16);					\
+	  outbuf += 2;							\
+	}								\
+      else								\
+	{								\
+	  /* Emit the UTF-32 Byte Order Mark.  */			\
+	  if (__glibc_unlikely (outbuf + 4 > outend))			\
+	    return __GCONV_FULL_OUTPUT;					\
+									\
+	  put32u (outbuf, BOM_UTF32);					\
+	  outbuf += 4;							\
+	}								\
+    }
+
+/* Conversion function from UTF-16 to UTF-32 internal/BE.  */
+
+/* The software routine is copied from utf-16.c (minus bytes
+   swapping).  */
+#define BODY_FROM_C							\
+  {									\
+    uint16_t u1 = get16 (inptr);					\
+									\
+    if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff)		\
+      {									\
+	/* No surrogate.  */						\
+	put32 (outptr, u1);						\
+	inptr += 2;							\
+      }									\
+    else								\
+      {									\
+	/* An isolated low-surrogate was found.  This has to be         \
+	   considered ill-formed.  */					\
+	if (__glibc_unlikely (u1 >= 0xdc00))				\
+	  {								\
+	    STANDARD_FROM_LOOP_ERR_HANDLER (2);				\
+	  }								\
+	/* It's a surrogate character.  At least the first word says	\
+	   it is.  */							\
+	if (__glibc_unlikely (inptr + 4 > inend))			\
+	  {								\
+	    /* We don't have enough input for another complete input	\
+	       character.  */						\
+	    result = __GCONV_INCOMPLETE_INPUT;				\
+	    break;							\
+	  }								\
+									\
+	inptr += 2;							\
+	uint16_t u2 = get16 (inptr);					\
+	if (__builtin_expect (u2 < 0xdc00, 0)				\
+	    || __builtin_expect (u2 > 0xdfff, 0))			\
+	  {								\
+	    /* This is no valid second word for a surrogate.  */	\
+	    inptr -= 2;							\
+	    STANDARD_FROM_LOOP_ERR_HANDLER (2);				\
+	  }								\
+									\
+	put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00));		\
+	inptr += 2;							\
+      }									\
+    outptr += 4;							\
+  }
+
+#define BODY_FROM_VX							\
+  {									\
+    size_t inlen = inend - inptr;					\
+    size_t outlen = outend - outptr;					\
+    unsigned long tmp, tmp2, tmp3;					\
+    asm volatile (".machine push\n\t"					\
+		  ".machine \"z13\"\n\t"				\
+		  ".machinemode \"zarch_nohighgprs\"\n\t"		\
+		  /* Setup to check for surrogates.  */			\
+		  "    larl %[R_TMP],9f\n\t"				\
+		  "    vlm %%v30,%%v31,0(%[R_TMP])\n\t"			\
+		  CONVERT_32BIT_SIZE_T ([R_INLEN])			\
+		  CONVERT_32BIT_SIZE_T ([R_OUTLEN])			\
+		  /* Loop which handles UTF-16 chars <0xd800, >0xdfff.  */ \
+		  "0:  clgijl %[R_INLEN],16,2f\n\t"			\
+		  "    clgijl %[R_OUTLEN],32,2f\n\t"			\
+		  "1:  vl %%v16,0(%[R_IN])\n\t"				\
+		  /* Check for surrogate chars.  */			\
+		  "    vstrchs %%v19,%%v16,%%v30,%%v31\n\t"		\
+		  "    jno 10f\n\t"					\
+		  /* Enlarge to UTF-32.  */				\
+		  "    vuplhh %%v17,%%v16\n\t"				\
+		  "    la %[R_IN],16(%[R_IN])\n\t"			\
+		  "    vupllh %%v18,%%v16\n\t"				\
+		  "    aghi %[R_INLEN],-16\n\t"				\
+		  /* Store 32 bytes to buf_out.  */			\
+		  "    vstm %%v17,%%v18,0(%[R_OUT])\n\t"		\
+		  "    aghi %[R_OUTLEN],-32\n\t"			\
+		  "    la %[R_OUT],32(%[R_OUT])\n\t"			\
+		  "    clgijl %[R_INLEN],16,2f\n\t"			\
+		  "    clgijl %[R_OUTLEN],32,2f\n\t"			\
+		  "    j 1b\n\t"					\
+		  /* Setup to check for ch >= 0xd800 && ch <= 0xdfff. (v30, v31)  */ \
+		  "9:  .short 0xd800,0xdfff,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
+		  "    .short 0xa000,0xc000,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
+		  /* At least on uint16_t is in range of surrogates.	\
+		     Store the preceding chars.  */			\
+		  "10: vlgvb %[R_TMP],%%v19,7\n\t"			\
+		  "    vuplhh %%v17,%%v16\n\t"				\
+		  "    sllg %[R_TMP3],%[R_TMP],1\n\t" /* Number of out bytes.  */ \
+		  "    ahik %[R_TMP2],%[R_TMP3],-1\n\t" /* Highest index to store.  */ \
+		  "    jl 12f\n\t"					\
+		  "    vstl %%v17,%[R_TMP2],0(%[R_OUT])\n\t"		\
+		  "    vupllh %%v18,%%v16\n\t"				\
+		  "    ahi %[R_TMP2],-16\n\t"				\
+		  "    jl 11f\n\t"					\
+		  "    vstl %%v18,%[R_TMP2],16(%[R_OUT])\n\t"		\
+		  "11: \n\t" /* Update pointers.  */			\
+		  "    la %[R_IN],0(%[R_TMP],%[R_IN])\n\t"		\
+		  "    slgr %[R_INLEN],%[R_TMP]\n\t"			\
+		  "    la %[R_OUT],0(%[R_TMP3],%[R_OUT])\n\t"		\
+		  "    slgr %[R_OUTLEN],%[R_TMP3]\n\t"			\
+		  /* Calculate remaining uint16_t values in loaded vrs.  */ \
+		  "12: lghi %[R_TMP2],16\n\t"				\
+		  "    sgr %[R_TMP2],%[R_TMP]\n\t"			\
+		  "    srl %[R_TMP2],1\n\t"				\
+		  "    llh %[R_TMP],0(%[R_IN])\n\t"			\
+		  "    aghi %[R_OUTLEN],-4\n\t"				\
+		  "    j 16f\n\t"					\
+		  /* Handle remaining bytes.  */			\
+		  "2:  \n\t"						\
+		  /* Zero, one or more bytes available?  */		\
+		  "    clgfi %[R_INLEN],1\n\t"				\
+		  "    je 97f\n\t" /* Only one byte available.  */	\
+		  "    jl 99f\n\t" /* End if no bytes available.  */	\
+		  /* Calculate remaining uint16_t values in inptr.  */	\
+		  "    srlg %[R_TMP2],%[R_INLEN],1\n\t"			\
+		  /* Handle remaining uint16_t values.  */		\
+		  "13: llh %[R_TMP],0(%[R_IN])\n\t"			\
+		  "    slgfi %[R_OUTLEN],4\n\t"				\
+		  "    jl 96f \n\t"					\
+		  "    clfi %[R_TMP],0xd800\n\t"			\
+		  "    jhe 15f\n\t"					\
+		  "14: st %[R_TMP],0(%[R_OUT])\n\t"			\
+		  "    la %[R_IN],2(%[R_IN])\n\t"			\
+		  "    aghi %[R_INLEN],-2\n\t"				\
+		  "    la %[R_OUT],4(%[R_OUT])\n\t"			\
+		  "    brctg %[R_TMP2],13b\n\t"				\
+		  "    j 0b\n\t" /* Switch to vx-loop.  */		\
+		  /* Handle UTF-16 surrogate pair.  */			\
+		  "15: clfi %[R_TMP],0xdfff\n\t"			\
+		  "    jh 14b\n\t" /* Jump away if ch > 0xdfff.  */	\
+		  "16: clfi %[R_TMP],0xdc00\n\t"			\
+		  "    jhe 98f\n\t" /* Jump away in case of low-surrogate.  */ \
+		  "    slgfi %[R_INLEN],4\n\t"				\
+		  "    jl 97f\n\t" /* Big enough input?  */		\
+		  "    llh %[R_TMP3],2(%[R_IN])\n\t" /* Load low surrogate.  */ \
+		  "    slfi %[R_TMP],0xd7c0\n\t"			\
+		  "    sll %[R_TMP],10\n\t"				\
+		  "    risbgn %[R_TMP],%[R_TMP3],54,63,0\n\t" /* Insert klmnopqrst.  */ \
+		  "    nilf %[R_TMP3],0xfc00\n\t"			\
+		  "    clfi %[R_TMP3],0xdc00\n\t" /* Check if it starts with 0xdc00.  */ \
+		  "    jne 98f\n\t"					\
+		  "    st %[R_TMP],0(%[R_OUT])\n\t"			\
+		  "    la %[R_IN],4(%[R_IN])\n\t"			\
+		  "    la %[R_OUT],4(%[R_OUT])\n\t"			\
+		  "    aghi %[R_TMP2],-2\n\t"				\
+		  "    jh 13b\n\t" /* Handle remaining uint16_t values.  */ \
+		  "    j 0b\n\t" /* Switch to vx-loop.  */		\
+		  "96: \n\t" /* Return full output.  */			\
+		  "    lghi %[R_RES],%[RES_OUT_FULL]\n\t"		\
+		  "    j 99f\n\t"					\
+		  "97: \n\t" /* Return incomplete input.  */		\
+		  "    lghi %[R_RES],%[RES_IN_FULL]\n\t"		\
+		  "    j 99f\n\t"					\
+		  "98:\n\t" /* Return Illegal character.  */		\
+		  "    lghi %[R_RES],%[RES_IN_ILL]\n\t"			\
+		  "99:\n\t"						\
+		  ".machine pop"					\
+		  : /* outputs */ [R_IN] "+a" (inptr)			\
+		    , [R_INLEN] "+d" (inlen), [R_OUT] "+a" (outptr)	\
+		    , [R_OUTLEN] "+d" (outlen), [R_TMP] "=a" (tmp)	\
+		    , [R_TMP2] "=d" (tmp2), [R_TMP3] "=a" (tmp3)	\
+		    , [R_RES] "+d" (result)				\
+		  : /* inputs */					\
+		    [RES_OUT_FULL] "i" (__GCONV_FULL_OUTPUT)		\
+		    , [RES_IN_ILL] "i" (__GCONV_ILLEGAL_INPUT)		\
+		    , [RES_IN_FULL] "i" (__GCONV_INCOMPLETE_INPUT)	\
+		  : /* clobber list */ "memory", "cc"			\
+		    ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17")	\
+		    ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19")	\
+		    ASM_CLOBBER_VR ("v30") ASM_CLOBBER_VR ("v31")	\
+		  );							\
+    if (__glibc_likely (inptr == inend)					\
+	|| result != __GCONV_ILLEGAL_INPUT)				\
+      break;								\
+									\
+    STANDARD_FROM_LOOP_ERR_HANDLER (2);					\
+  }
+
+
+/* Generate loop-function with software routing.  */
+#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
+#define MAX_NEEDED_INPUT	MAX_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
+#if defined HAVE_S390_VX_ASM_SUPPORT
+# define LOOPFCT		__from_utf16_loop_c
+# define LOOP_NEED_FLAGS
+# define BODY			BODY_FROM_C
+# include <iconv/loop.c>
+
+/* Generate loop-function with hardware vector instructions.  */
+# define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
+# define MAX_NEEDED_INPUT	MAX_NEEDED_FROM
+# define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
+# define LOOPFCT		__from_utf16_loop_vx
+# define LOOP_NEED_FLAGS
+# define BODY			BODY_FROM_VX
+# include <iconv/loop.c>
+
+/* Generate ifunc'ed loop function.  */
+__typeof(__from_utf16_loop_c)
+__attribute__ ((ifunc ("__from_utf16_loop_resolver")))
+__from_utf16_loop;
+
+static void *
+__from_utf16_loop_resolver (unsigned long int dl_hwcap)
+{
+  if (dl_hwcap & HWCAP_S390_VX)
+    return __from_utf16_loop_vx;
+  else
+    return __from_utf16_loop_c;
+}
+
+strong_alias (__from_utf16_loop_c_single, __from_utf16_loop_single)
+#else
+# define LOOPFCT		FROM_LOOP
+# define LOOP_NEED_FLAGS
+# define BODY			BODY_FROM_C
+# include <iconv/loop.c>
+#endif
+
+/* Conversion from UTF-32 internal/BE to UTF-16.  */
+
+/* The software routine is copied from utf-16.c (minus bytes
+   swapping).  */
+#define BODY_TO_C							\
+  {									\
+    uint32_t c = get32 (inptr);						\
+									\
+    if (__builtin_expect (c <= 0xd7ff, 1)				\
+	|| (c >=0xdc00 && c <= 0xffff))					\
+      {									\
+	/* Two UTF-16 chars.  */					\
+	put16 (outptr, c);						\
+      }									\
+    else if (__builtin_expect (c >= 0x10000, 1)				\
+	     && __builtin_expect (c <= 0x10ffff, 1))			\
+      {									\
+	/* Four UTF-16 chars.  */					\
+	uint16_t zabcd = ((c & 0x1f0000) >> 16) - 1;			\
+	uint16_t out;							\
+									\
+	/* Generate a surrogate character.  */				\
+	if (__glibc_unlikely (outptr + 4 > outend))			\
+	  {								\
+	    /* Overflow in the output buffer.  */			\
+	    result = __GCONV_FULL_OUTPUT;				\
+	    break;							\
+	  }								\
+									\
+	out = 0xd800;							\
+	out |= (zabcd & 0xff) << 6;					\
+	out |= (c >> 10) & 0x3f;					\
+	put16 (outptr, out);						\
+	outptr += 2;							\
+									\
+	out = 0xdc00;							\
+	out |= c & 0x3ff;						\
+	put16 (outptr, out);						\
+      }									\
+    else								\
+      {									\
+	STANDARD_TO_LOOP_ERR_HANDLER (4);				\
+      }									\
+    outptr += 2;							\
+    inptr += 4;								\
+  }
+
+#define BODY_TO_ETF3EH							\
+  {									\
+    HARDWARE_CONVERT ("cu42 %0, %1");					\
+									\
+    if (__glibc_likely (inptr == inend)					\
+	|| result == __GCONV_FULL_OUTPUT)				\
+      break;								\
+									\
+    if (inptr + 4 > inend)						\
+      {									\
+	result = __GCONV_INCOMPLETE_INPUT;				\
+	break;								\
+      }									\
+									\
+    STANDARD_TO_LOOP_ERR_HANDLER (4);					\
+  }
+
+#define BODY_TO_VX							\
+  {									\
+    register const unsigned char* pInput asm ("8") = inptr;		\
+    register size_t inlen asm ("9") = inend - inptr;			\
+    register unsigned char* pOutput asm ("10") = outptr;		\
+    register size_t outlen asm("11") = outend - outptr;			\
+    unsigned long tmp, tmp2, tmp3;					\
+    asm volatile (".machine push\n\t"					\
+		  ".machine \"z13\"\n\t"				\
+		  ".machinemode \"zarch_nohighgprs\"\n\t"		\
+		  /* Setup to check for surrogates.  */			\
+		  "    larl %[R_TMP],9f\n\t"				\
+		  "    vlm %%v30,%%v31,0(%[R_TMP])\n\t"			\
+		  CONVERT_32BIT_SIZE_T ([R_INLEN])			\
+		  CONVERT_32BIT_SIZE_T ([R_OUTLEN])			\
+		  /* Loop which handles UTF-16 chars			\
+		     ch < 0xd800 || (ch > 0xdfff && ch < 0x10000).  */	\
+		  "0:  clgijl %[R_INLEN],32,20f\n\t"			\
+		  "    clgijl %[R_OUTLEN],16,20f\n\t"			\
+		  "1:  vlm %%v16,%%v17,0(%[R_IN])\n\t"			\
+		  "    lghi %[R_TMP2],0\n\t"				\
+		  /* Shorten to UTF-16.  */				\
+		  "    vpkf %%v18,%%v16,%%v17\n\t"			\
+		  /* Check for surrogate chars.  */			\
+		  "    vstrcfs %%v19,%%v16,%%v30,%%v31\n\t"		\
+		  "    jno 10f\n\t"					\
+		  "    vstrcfs %%v19,%%v17,%%v30,%%v31\n\t"		\
+		  "    jno 11f\n\t"					\
+		  /* Store 16 bytes to buf_out.  */			\
+		  "    vst %%v18,0(%[R_OUT])\n\t"			\
+		  "    la %[R_IN],32(%[R_IN])\n\t"			\
+		  "    aghi %[R_INLEN],-32\n\t"				\
+		  "    aghi %[R_OUTLEN],-16\n\t"			\
+		  "    la %[R_OUT],16(%[R_OUT])\n\t"			\
+		  "    clgijl %[R_INLEN],32,20f\n\t"			\
+		  "    clgijl %[R_OUTLEN],16,20f\n\t"			\
+		  "    j 1b\n\t"					\
+		  /* Setup to check for ch >= 0xd800 && ch <= 0xdfff	\
+		     and check for ch >= 0x10000. (v30, v31)  */	\
+		  "9:  .long 0xd800,0xdfff,0x10000,0x10000\n\t"		\
+		  "    .long 0xa0000000,0xc0000000, 0xa0000000,0xa0000000\n\t" \
+		  /* At least on UTF32 char is in range of surrogates.	\
+		     Store the preceding characters.  */		\
+		  "11: ahi %[R_TMP2],16\n\t"				\
+		  "10: vlgvb %[R_TMP],%%v19,7\n\t"			\
+		  "    agr %[R_TMP],%[R_TMP2]\n\t"			\
+		  "    srlg %[R_TMP3],%[R_TMP],1\n\t" /* Number of out bytes.  */ \
+		  "    ahik %[R_TMP2],%[R_TMP3],-1\n\t" /* Highest index to store.  */ \
+		  "    jl 20f\n\t"					\
+		  "    vstl %%v18,%[R_TMP2],0(%[R_OUT])\n\t"		\
+		  /* Update pointers.  */				\
+		  "    la %[R_IN],0(%[R_TMP],%[R_IN])\n\t"		\
+		  "    slgr %[R_INLEN],%[R_TMP]\n\t"			\
+		  "    la %[R_OUT],0(%[R_TMP3],%[R_OUT])\n\t"		\
+		  "    slgr %[R_OUTLEN],%[R_TMP3]\n\t"			\
+		  /* Handles UTF16 surrogates with convert instruction.  */ \
+		  "20: cu42 %[R_OUT],%[R_IN]\n\t"			\
+		  "    jo 0b\n\t" /* Try vector implemenation again.  */ \
+		  "    lochil %[R_RES],%[RES_OUT_FULL]\n\t" /* cc == 1.  */ \
+		  "    lochih %[R_RES],%[RES_IN_ILL]\n\t" /* cc == 2.  */ \
+		  ".machine pop"					\
+		  : /* outputs */ [R_IN] "+a" (pInput)			\
+		    , [R_INLEN] "+d" (inlen), [R_OUT] "+a" (pOutput)	\
+		    , [R_OUTLEN] "+d" (outlen), [R_TMP] "=a" (tmp)	\
+		    , [R_TMP2] "=d" (tmp2), [R_TMP3] "=a" (tmp3)	\
+		    , [R_RES] "+d" (result)				\
+		  : /* inputs */					\
+		    [RES_OUT_FULL] "i" (__GCONV_FULL_OUTPUT)		\
+		    , [RES_IN_ILL] "i" (__GCONV_ILLEGAL_INPUT)		\
+		    , [RES_IN_FULL] "i" (__GCONV_INCOMPLETE_INPUT)	\
+		  : /* clobber list */ "memory", "cc"			\
+		    ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17")	\
+		    ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19")	\
+		    ASM_CLOBBER_VR ("v30") ASM_CLOBBER_VR ("v31")	\
+		  );							\
+    inptr = pInput;							\
+    outptr = pOutput;							\
+									\
+    if (__glibc_likely (inptr == inend)					\
+	|| result == __GCONV_FULL_OUTPUT)				\
+      break;								\
+    if (inptr + 4 > inend)						\
+      {									\
+	result = __GCONV_INCOMPLETE_INPUT;				\
+	break;								\
+      }									\
+    STANDARD_TO_LOOP_ERR_HANDLER (4);					\
+  }
+
+/* Generate loop-function with software routing.  */
+#define MIN_NEEDED_INPUT	MIN_NEEDED_TO
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
+#define MAX_NEEDED_OUTPUT	MAX_NEEDED_FROM
+#define LOOPFCT			__to_utf16_loop_c
+#define LOOP_NEED_FLAGS
+#define BODY			BODY_TO_C
+#include <iconv/loop.c>
+
+/* Generate loop-function with hardware utf-convert instruction.  */
+#define MIN_NEEDED_INPUT	MIN_NEEDED_TO
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
+#define MAX_NEEDED_OUTPUT	MAX_NEEDED_FROM
+#define LOOPFCT			__to_utf16_loop_etf3eh
+#define LOOP_NEED_FLAGS
+#define BODY			BODY_TO_ETF3EH
+#include <iconv/loop.c>
+
+#if defined HAVE_S390_VX_ASM_SUPPORT
+/* Generate loop-function with hardware vector instructions.  */
+# define MIN_NEEDED_INPUT	MIN_NEEDED_TO
+# define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
+# define MAX_NEEDED_OUTPUT	MAX_NEEDED_FROM
+# define LOOPFCT		__to_utf16_loop_vx
+# define LOOP_NEED_FLAGS
+# define BODY			BODY_TO_VX
+# include <iconv/loop.c>
+#endif
+
+/* Generate ifunc'ed loop function.  */
+__typeof(__to_utf16_loop_c)
+__attribute__ ((ifunc ("__to_utf16_loop_resolver")))
+__to_utf16_loop;
+
+static void *
+__to_utf16_loop_resolver (unsigned long int dl_hwcap)
+{
+#if defined HAVE_S390_VX_ASM_SUPPORT
+  if (dl_hwcap & HWCAP_S390_VX)
+    return __to_utf16_loop_vx;
+  else
+#endif
+  if (dl_hwcap & HWCAP_S390_ZARCH && dl_hwcap & HWCAP_S390_HIGH_GPRS
+      && dl_hwcap & HWCAP_S390_ETF3EH)
+    return __to_utf16_loop_etf3eh;
+  else
+    return __to_utf16_loop_c;
+}
+
+strong_alias (__to_utf16_loop_c_single, __to_utf16_loop_single)
+
+
+#include <iconv/skeleton.c>