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glibc/sysdeps/s390/utf8-utf32-z9.c
Stefan Liebler 23ea69a9d6 S390: Use cu41 instruction for converting from utf32 to utf8. 
This patch adds an ifunc variant to use the cu instruction on arch12 CPUs.
This new ifunc variant can be built if binutils support z13 vector
instructions.  At runtime, HWCAP_S390_VXE decides if we can use the
cu41 instruction.

ChangeLog:

	* sysdeps/s390/utf8-utf32-z9.c (__to_utf8_loop_vx_cu):
	Use vector and cu41 instruction.
	* sysdeps/s390/multiarch/utf8-utf32-z9.c: Add __to_utf8_loop_vx_cu
	in ifunc resolver.
2017-06-27 17:09:42 +02:00

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/* Conversion between UTF-8 and UTF-32 BE/internal.
This module uses the Z9-109 variants of the Convert Unicode
instructions.
Copyright (C) 1997-2017 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 <gconv.h>
#include <string.h>
/* Select which versions should be defined depending on support
for multiarch, vector and used minimum architecture level. */
#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
# define HAVE_FROM_C 0
# define FROM_LOOP_DEFAULT FROM_LOOP_CU
#else
# define HAVE_FROM_C 1
# define FROM_LOOP_DEFAULT FROM_LOOP_C
#endif
#define HAVE_TO_C 1
#define TO_LOOP_DEFAULT TO_LOOP_C
#if defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT || defined USE_MULTIARCH
# define HAVE_FROM_CU 1
#else
# define HAVE_FROM_CU 0
#endif
#if defined HAVE_S390_VX_ASM_SUPPORT && defined USE_MULTIARCH
# define HAVE_FROM_VX 1
# define HAVE_TO_VX 1
# define HAVE_TO_VX_CU 1
#else
# define HAVE_FROM_VX 0
# define HAVE_TO_VX 0
# define HAVE_TO_VX_CU 0
#endif
#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
/* Defines for skeleton.c. */
#define DEFINE_INIT 0
#define DEFINE_FINI 0
#define MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 6
#define MIN_NEEDED_TO 4
#define FROM_LOOP FROM_LOOP_DEFAULT
#define TO_LOOP TO_LOOP_DEFAULT
#define FROM_DIRECTION (dir == from_utf8)
#define ONE_DIRECTION 0
/* UTF-32 big endian byte order mark. */
#define BOM 0x0000feffu
/* Direction of the transformation. */
enum direction
{
illegal_dir,
to_utf8,
from_utf8
};
struct utf8_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 utf8_data *new_data;
enum direction dir = illegal_dir;
int emit_bom;
int result;
emit_bom = (__strcasecmp (step->__to_name, "UTF-32//") == 0);
if (__strcasecmp (step->__from_name, "ISO-10646/UTF8/") == 0
&& (__strcasecmp (step->__to_name, "UTF-32//") == 0
|| __strcasecmp (step->__to_name, "UTF-32BE//") == 0
|| __strcasecmp (step->__to_name, "INTERNAL") == 0))
{
dir = from_utf8;
}
else if (__strcasecmp (step->__to_name, "ISO-10646/UTF8/") == 0
&& (__strcasecmp (step->__from_name, "UTF-32BE//") == 0
|| __strcasecmp (step->__from_name, "INTERNAL") == 0))
{
dir = to_utf8;
}
result = __GCONV_NOCONV;
if (dir != illegal_dir)
{
new_data = (struct utf8_data *) malloc (sizeof (struct utf8_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_utf8)
{
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 utf8_data *) step->__data)->dir; \
int emit_bom = ((struct utf8_data *) step->__data)->emit_bom; \
\
if (emit_bom && !data->__internal_use \
&& data->__invocation_counter == 0) \
{ \
/* Emit the Byte Order Mark. */ \
if (__glibc_unlikely (outbuf + 4 > outend)) \
return __GCONV_FULL_OUTPUT; \
\
put32u (outbuf, BOM); \
outbuf += 4; \
}
/* Conversion function from UTF-8 to UTF-32 internal/BE. */
#define STORE_REST_COMMON \
{ \
/* We store the remaining bytes while converting them into the UCS4 \
format. We can assume that the first byte in the buffer is \
correct and that it requires a larger number of bytes than there \
are in the input buffer. */ \
wint_t ch = **inptrp; \
size_t cnt, r; \
\
state->__count = inend - *inptrp; \
\
assert (ch != 0xc0 && ch != 0xc1); \
if (ch >= 0xc2 && ch < 0xe0) \
{ \
/* We expect two bytes. The first byte cannot be 0xc0 or \
0xc1, otherwise the wide character could have been \
represented using a single byte. */ \
cnt = 2; \
ch &= 0x1f; \
} \
else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \
{ \
/* We expect three bytes. */ \
cnt = 3; \
ch &= 0x0f; \
} \
else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \
{ \
/* We expect four bytes. */ \
cnt = 4; \
ch &= 0x07; \
} \
else if (__glibc_likely ((ch & 0xfc) == 0xf8)) \
{ \
/* We expect five bytes. */ \
cnt = 5; \
ch &= 0x03; \
} \
else \
{ \
/* We expect six bytes. */ \
cnt = 6; \
ch &= 0x01; \
} \
\
/* The first byte is already consumed. */ \
r = cnt - 1; \
while (++(*inptrp) < inend) \
{ \
ch <<= 6; \
ch |= **inptrp & 0x3f; \
--r; \
} \
\
/* Shift for the so far missing bytes. */ \
ch <<= r * 6; \
\
/* Store the number of bytes expected for the entire sequence. */ \
state->__count |= cnt << 8; \
\
/* Store the value. */ \
state->__value.__wch = ch; \
}
#define UNPACK_BYTES_COMMON \
{ \
static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc }; \
wint_t wch = state->__value.__wch; \
size_t ntotal = state->__count >> 8; \
\
inlen = state->__count & 255; \
\
bytebuf[0] = inmask[ntotal - 2]; \
\
do \
{ \
if (--ntotal < inlen) \
bytebuf[ntotal] = 0x80 | (wch & 0x3f); \
wch >>= 6; \
} \
while (ntotal > 1); \
\
bytebuf[0] |= wch; \
}
#define CLEAR_STATE_COMMON \
state->__count = 0
#define BODY_FROM_HW(ASM) \
{ \
ASM; \
if (__glibc_likely (inptr == inend) \
|| result == __GCONV_FULL_OUTPUT) \
break; \
\
int i; \
for (i = 1; inptr + i < inend && i < 5; ++i) \
if ((inptr[i] & 0xc0) != 0x80) \
break; \
\
if (__glibc_likely (inptr + i == inend \
&& result == __GCONV_EMPTY_INPUT)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
STANDARD_FROM_LOOP_ERR_HANDLER (i); \
}
#if HAVE_FROM_C == 1
/* The software routine is copied from gconv_simple.c. */
# define BODY_FROM_C \
{ \
/* Next input byte. */ \
uint32_t ch = *inptr; \
\
if (__glibc_likely (ch < 0x80)) \
{ \
/* One byte sequence. */ \
++inptr; \
} \
else \
{ \
uint_fast32_t cnt; \
uint_fast32_t i; \
\
if (ch >= 0xc2 && ch < 0xe0) \
{ \
/* We expect two bytes. The first byte cannot be 0xc0 or \
0xc1, otherwise the wide character could have been \
represented using a single byte. */ \
cnt = 2; \
ch &= 0x1f; \
} \
else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \
{ \
/* We expect three bytes. */ \
cnt = 3; \
ch &= 0x0f; \
} \
else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \
{ \
/* We expect four bytes. */ \
cnt = 4; \
ch &= 0x07; \
} \
else \
{ \
/* Search the end of this ill-formed UTF-8 character. This \
is the next byte with (x & 0xc0) != 0x80. */ \
i = 0; \
do \
++i; \
while (inptr + i < inend \
&& (*(inptr + i) & 0xc0) == 0x80 \
&& i < 5); \
\
errout: \
STANDARD_FROM_LOOP_ERR_HANDLER (i); \
} \
\
if (__glibc_unlikely (inptr + cnt > inend)) \
{ \
/* We don't have enough input. But before we report \
that check that all the bytes are correct. */ \
for (i = 1; inptr + i < inend; ++i) \
if ((inptr[i] & 0xc0) != 0x80) \
break; \
\
if (__glibc_likely (inptr + i == inend)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
goto errout; \
} \
\
/* Read the possible remaining bytes. */ \
for (i = 1; i < cnt; ++i) \
{ \
uint32_t byte = inptr[i]; \
\
if ((byte & 0xc0) != 0x80) \
/* This is an illegal encoding. */ \
break; \
\
ch <<= 6; \
ch |= byte & 0x3f; \
} \
\
/* If i < cnt, some trail byte was not >= 0x80, < 0xc0. \
If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could \
have been represented with fewer than cnt bytes. */ \
if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0) \
/* Do not accept UTF-16 surrogates. */ \
|| (ch >= 0xd800 && ch <= 0xdfff) \
|| (ch > 0x10ffff)) \
{ \
/* This is an illegal encoding. */ \
goto errout; \
} \
\
inptr += cnt; \
} \
\
/* Now adjust the pointers and store the result. */ \
*((uint32_t *) outptr) = ch; \
outptr += sizeof (uint32_t); \
}
/* These definitions apply to the UTF-8 to UTF-32 direction. The
software implementation for UTF-8 still supports multibyte
characters up to 6 bytes whereas the hardware variant does not. */
# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
# define MAX_NEEDED_INPUT MAX_NEEDED_FROM
# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
# define FROM_LOOP_C __from_utf8_loop_c
# define LOOPFCT FROM_LOOP_C
# define LOOP_NEED_FLAGS
# define STORE_REST STORE_REST_COMMON
# define UNPACK_BYTES UNPACK_BYTES_COMMON
# define CLEAR_STATE CLEAR_STATE_COMMON
# define BODY BODY_FROM_C
# include <iconv/loop.c>
#else
# define FROM_LOOP_C NULL
#endif /* HAVE_FROM_C != 1 */
#if HAVE_FROM_CU == 1
/* This hardware routine uses the Convert UTF8 to UTF32 (cu14) instruction. */
# define BODY_FROM_ETF3EH BODY_FROM_HW (HARDWARE_CONVERT ("cu14 %0, %1, 1"))
/* Generate loop-function with hardware utf-convert instruction. */
# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
# define MAX_NEEDED_INPUT MAX_NEEDED_FROM
# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
# define FROM_LOOP_CU __from_utf8_loop_etf3eh
# define LOOPFCT FROM_LOOP_CU
# define LOOP_NEED_FLAGS
# define STORE_REST STORE_REST_COMMON
# define UNPACK_BYTES UNPACK_BYTES_COMMON
# define CLEAR_STATE CLEAR_STATE_COMMON
# define BODY BODY_FROM_ETF3EH
# include <iconv/loop.c>
#else
# define FROM_LOOP_CU NULL
#endif /* HAVE_FROM_CU != 1 */
#if HAVE_FROM_VX == 1
# define HW_FROM_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" \
" vrepib %%v30,0x7f\n\t" /* For compare > 0x7f. */ \
" vrepib %%v31,0x20\n\t" \
CONVERT_32BIT_SIZE_T ([R_INLEN]) \
CONVERT_32BIT_SIZE_T ([R_OUTLEN]) \
/* Loop which handles UTF-8 chars <=0x7f. */ \
"0: clgijl %[R_INLEN],16,20f\n\t" \
" clgijl %[R_OUTLEN],64,20f\n\t" \
"1: vl %%v16,0(%[R_IN])\n\t" \
" vstrcbs %%v17,%%v16,%%v30,%%v31\n\t" \
" jno 10f\n\t" /* Jump away if not all bytes are 1byte \
UTF8 chars. */ \
/* Enlarge to UCS4. */ \
" vuplhb %%v18,%%v16\n\t" \
" vupllb %%v19,%%v16\n\t" \
" la %[R_IN],16(%[R_IN])\n\t" \
" vuplhh %%v20,%%v18\n\t" \
" aghi %[R_INLEN],-16\n\t" \
" vupllh %%v21,%%v18\n\t" \
" aghi %[R_OUTLEN],-64\n\t" \
" vuplhh %%v22,%%v19\n\t" \
" vupllh %%v23,%%v19\n\t" \
/* Store 64 bytes to buf_out. */ \
" vstm %%v20,%%v23,0(%[R_OUT])\n\t" \
" la %[R_OUT],64(%[R_OUT])\n\t" \
" clgijl %[R_INLEN],16,20f\n\t" \
" clgijl %[R_OUTLEN],64,20f\n\t" \
" j 1b\n\t" \
"10: \n\t" \
/* At least one byte is > 0x7f. \
Store the preceding 1-byte chars. */ \
" vlgvb %[R_TMP],%%v17,7\n\t" \
" sllk %[R_TMP2],%[R_TMP],2\n\t" /* Compute highest \
index to store. */ \
" llgfr %[R_TMP3],%[R_TMP2]\n\t" \
" ahi %[R_TMP2],-1\n\t" \
" jl 20f\n\t" \
" vuplhb %%v18,%%v16\n\t" \
" vuplhh %%v20,%%v18\n\t" \
" vstl %%v20,%[R_TMP2],0(%[R_OUT])\n\t" \
" ahi %[R_TMP2],-16\n\t" \
" jl 11f\n\t" \
" vupllh %%v21,%%v18\n\t" \
" vstl %%v21,%[R_TMP2],16(%[R_OUT])\n\t" \
" ahi %[R_TMP2],-16\n\t" \
" jl 11f\n\t" \
" vupllb %%v19,%%v16\n\t" \
" vuplhh %%v22,%%v19\n\t" \
" vstl %%v22,%[R_TMP2],32(%[R_OUT])\n\t" \
" ahi %[R_TMP2],-16\n\t" \
" jl 11f\n\t" \
" vupllh %%v23,%%v19\n\t" \
" vstl %%v23,%[R_TMP2],48(%[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" \
/* Handle multibyte utf8-char with convert instruction. */ \
"20: cu14 %[R_OUT],%[R_IN],1\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) \
: /* clobber list */ "memory", "cc" \
ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17") \
ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19") \
ASM_CLOBBER_VR ("v20") ASM_CLOBBER_VR ("v21") \
ASM_CLOBBER_VR ("v22") ASM_CLOBBER_VR ("v30") \
ASM_CLOBBER_VR ("v31") \
); \
inptr = pInput; \
outptr = pOutput; \
}
# define BODY_FROM_VX BODY_FROM_HW (HW_FROM_VX)
/* Generate loop-function with hardware vector and utf-convert instructions. */
# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
# define MAX_NEEDED_INPUT MAX_NEEDED_FROM
# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
# define FROM_LOOP_VX __from_utf8_loop_vx
# define LOOPFCT FROM_LOOP_VX
# define LOOP_NEED_FLAGS
# define STORE_REST STORE_REST_COMMON
# define UNPACK_BYTES UNPACK_BYTES_COMMON
# define CLEAR_STATE CLEAR_STATE_COMMON
# define BODY BODY_FROM_VX
# include <iconv/loop.c>
#else
# define FROM_LOOP_VX NULL
#endif /* HAVE_FROM_VX != 1 */
#if HAVE_TO_C == 1
/* The software routine mimics the S/390 cu41 instruction. */
# define BODY_TO_C \
{ \
uint32_t wc = *((const uint32_t *) inptr); \
\
if (__glibc_likely (wc <= 0x7f)) \
{ \
/* Single UTF-8 char. */ \
*outptr = (uint8_t)wc; \
outptr++; \
} \
else if (wc <= 0x7ff) \
{ \
/* Two UTF-8 chars. */ \
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
outptr[0] = 0xc0; \
outptr[0] |= wc >> 6; \
\
outptr[1] = 0x80; \
outptr[1] |= wc & 0x3f; \
\
outptr += 2; \
} \
else if (wc <= 0xffff) \
{ \
/* Three UTF-8 chars. */ \
if (__glibc_unlikely (outptr + 3 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
if (wc >= 0xd800 && wc <= 0xdfff) \
{ \
/* Do not accept UTF-16 surrogates. */ \
result = __GCONV_ILLEGAL_INPUT; \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
outptr[0] = 0xe0; \
outptr[0] |= wc >> 12; \
\
outptr[1] = 0x80; \
outptr[1] |= (wc >> 6) & 0x3f; \
\
outptr[2] = 0x80; \
outptr[2] |= wc & 0x3f; \
\
outptr += 3; \
} \
else if (wc <= 0x10ffff) \
{ \
/* Four UTF-8 chars. */ \
if (__glibc_unlikely (outptr + 4 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
outptr[0] = 0xf0; \
outptr[0] |= wc >> 18; \
\
outptr[1] = 0x80; \
outptr[1] |= (wc >> 12) & 0x3f; \
\
outptr[2] = 0x80; \
outptr[2] |= (wc >> 6) & 0x3f; \
\
outptr[3] = 0x80; \
outptr[3] |= wc & 0x3f; \
\
outptr += 4; \
} \
else \
{ \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
inptr += 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 TO_LOOP_C __to_utf8_loop_c
# define LOOPFCT TO_LOOP_C
# define BODY BODY_TO_C
# define LOOP_NEED_FLAGS
# include <iconv/loop.c>
#else
# define TO_LOOP_C NULL
#endif /* HAVE_TO_C != 1 */
#if HAVE_TO_VX == 1
/* The hardware routine uses the S/390 vector instructions. */
# define BODY_TO_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" \
" vleif %%v20,127,0\n\t" /* element 0: 127 */ \
" vzero %%v21\n\t" \
" vleih %%v21,8192,0\n\t" /* element 0: > */ \
" vleih %%v21,-8192,2\n\t" /* element 1: =<> */ \
CONVERT_32BIT_SIZE_T ([R_INLEN]) \
CONVERT_32BIT_SIZE_T ([R_OUTLEN]) \
/* Loop which handles UTF-32 chars <=0x7f. */ \
"0: clgijl %[R_INLEN],64,2f\n\t" \
" clgijl %[R_OUTLEN],16,2f\n\t" \
"1: vlm %%v16,%%v19,0(%[R_IN])\n\t" \
" lghi %[R_TMP2],0\n\t" \
/* Shorten to byte values. */ \
" vpkf %%v23,%%v16,%%v17\n\t" \
" vpkf %%v24,%%v18,%%v19\n\t" \
" vpkh %%v23,%%v23,%%v24\n\t" \
/* Checking for values > 0x7f. */ \
" vstrcfs %%v22,%%v16,%%v20,%%v21\n\t" \
" jno 10f\n\t" \
" vstrcfs %%v22,%%v17,%%v20,%%v21\n\t" \
" jno 11f\n\t" \
" vstrcfs %%v22,%%v18,%%v20,%%v21\n\t" \
" jno 12f\n\t" \
" vstrcfs %%v22,%%v19,%%v20,%%v21\n\t" \
" jno 13f\n\t" \
/* Store 16bytes to outptr. */ \
" vst %%v23,0(%[R_OUT])\n\t" \
" aghi %[R_INLEN],-64\n\t" \
" aghi %[R_OUTLEN],-16\n\t" \
" la %[R_IN],64(%[R_IN])\n\t" \
" la %[R_OUT],16(%[R_OUT])\n\t" \
" clgijl %[R_INLEN],64,2f\n\t" \
" clgijl %[R_OUTLEN],16,2f\n\t" \
" j 1b\n\t" \
/* Found a value > 0x7f. */ \
"13: ahi %[R_TMP2],4\n\t" \
"12: ahi %[R_TMP2],4\n\t" \
"11: ahi %[R_TMP2],4\n\t" \
"10: vlgvb %[R_TMP],%%v22,7\n\t" \
" srlg %[R_TMP],%[R_TMP],2\n\t" \
" agr %[R_TMP],%[R_TMP2]\n\t" \
" je 16f\n\t" \
/* Store characters before invalid one... */ \
" slgr %[R_OUTLEN],%[R_TMP]\n\t" \
"15: aghi %[R_TMP],-1\n\t" \
" vstl %%v23,%[R_TMP],0(%[R_OUT])\n\t" \
/* ... and update pointers. */ \
" aghi %[R_TMP],1\n\t" \
" la %[R_OUT],0(%[R_TMP],%[R_OUT])\n\t" \
" sllg %[R_TMP2],%[R_TMP],2\n\t" \
" la %[R_IN],0(%[R_TMP2],%[R_IN])\n\t" \
" slgr %[R_INLEN],%[R_TMP2]\n\t" \
/* Calculate remaining uint32_t values in loaded vrs. */ \
"16: lghi %[R_TMP2],16\n\t" \
" sgr %[R_TMP2],%[R_TMP]\n\t" \
" l %[R_TMP],0(%[R_IN])\n\t" \
" aghi %[R_INLEN],-4\n\t" \
" j 22f\n\t" \
/* Handle remaining bytes. */ \
"2: clgije %[R_INLEN],0,99f\n\t" \
" clgijl %[R_INLEN],4,92f\n\t" \
/* Calculate remaining uint32_t values in inptr. */ \
" srlg %[R_TMP2],%[R_INLEN],2\n\t" \
/* Handle multibyte utf8-char. */ \
"20: l %[R_TMP],0(%[R_IN])\n\t" \
" aghi %[R_INLEN],-4\n\t" \
/* Test if ch is 1byte UTF-8 char. */ \
"21: clijh %[R_TMP],0x7f,22f\n\t" \
/* Handle 1-byte UTF-8 char. */ \
"31: slgfi %[R_OUTLEN],1\n\t" \
" jl 90f \n\t" \
" stc %[R_TMP],0(%[R_OUT])\n\t" \
" la %[R_IN],4(%[R_IN])\n\t" \
" la %[R_OUT],1(%[R_OUT])\n\t" \
" brctg %[R_TMP2],20b\n\t" \
" j 0b\n\t" /* Switch to vx-loop. */ \
/* Test if ch is 2byte UTF-8 char. */ \
"22: clfi %[R_TMP],0x7ff\n\t" \
" jh 23f\n\t" \
/* Handle 2-byte UTF-8 char. */ \
"32: slgfi %[R_OUTLEN],2\n\t" \
" jl 90f \n\t" \
" llill %[R_TMP3],0xc080\n\t" \
" risbgn %[R_TMP3],%[R_TMP],51,55,2\n\t" /* 1. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 2. byte. */ \
" sth %[R_TMP3],0(%[R_OUT])\n\t" \
" la %[R_IN],4(%[R_IN])\n\t" \
" la %[R_OUT],2(%[R_OUT])\n\t" \
" brctg %[R_TMP2],20b\n\t" \
" j 0b\n\t" /* Switch to vx-loop. */ \
/* Test if ch is 3-byte UTF-8 char. */ \
"23: clfi %[R_TMP],0xffff\n\t" \
" jh 24f\n\t" \
/* Handle 3-byte UTF-8 char. */ \
"33: slgfi %[R_OUTLEN],3\n\t" \
" jl 90f \n\t" \
" llilf %[R_TMP3],0xe08080\n\t" \
" risbgn %[R_TMP3],%[R_TMP],44,47,4\n\t" /* 1. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],50,55,2\n\t" /* 2. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 3. byte. */ \
/* Test if ch is a UTF-16 surrogate: ch & 0xf800 == 0xd800 */ \
" nilf %[R_TMP],0xf800\n\t" \
" clfi %[R_TMP],0xd800\n\t" \
" je 91f\n\t" /* Do not accept UTF-16 surrogates. */ \
" stcm %[R_TMP3],7,0(%[R_OUT])\n\t" \
" la %[R_IN],4(%[R_IN])\n\t" \
" la %[R_OUT],3(%[R_OUT])\n\t" \
" brctg %[R_TMP2],20b\n\t" \
" j 0b\n\t" /* Switch to vx-loop. */ \
/* Test if ch is 4-byte UTF-8 char. */ \
"24: clfi %[R_TMP],0x10ffff\n\t" \
" jh 91f\n\t" /* ch > 0x10ffff is not allowed! */ \
/* Handle 4-byte UTF-8 char. */ \
"34: slgfi %[R_OUTLEN],4\n\t" \
" jl 90f \n\t" \
" llilf %[R_TMP3],0xf0808080\n\t" \
" risbgn %[R_TMP3],%[R_TMP],37,39,6\n\t" /* 1. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],42,47,4\n\t" /* 2. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],50,55,2\n\t" /* 3. byte. */ \
" risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 4. byte. */ \
" st %[R_TMP3],0(%[R_OUT])\n\t" \
" la %[R_IN],4(%[R_IN])\n\t" \
" la %[R_OUT],4(%[R_OUT])\n\t" \
" brctg %[R_TMP2],20b\n\t" \
" j 0b\n\t" /* Switch to vx-loop. */ \
"92: lghi %[R_RES],%[RES_IN_FULL]\n\t" \
" j 99f\n\t" \
"91: lghi %[R_RES],%[RES_IN_ILL]\n\t" \
" j 99f\n\t" \
"90: lghi %[R_RES],%[RES_OUT_FULL]\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] "=a" (tmp2), [R_TMP3] "=d" (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 ("v20") ASM_CLOBBER_VR ("v21") \
ASM_CLOBBER_VR ("v22") ASM_CLOBBER_VR ("v23") \
ASM_CLOBBER_VR ("v24") \
); \
if (__glibc_likely (inptr == inend) \
|| result != __GCONV_ILLEGAL_INPUT) \
break; \
\
STANDARD_TO_LOOP_ERR_HANDLER (4); \
}
/* 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 TO_LOOP_VX __to_utf8_loop_vx
# define LOOPFCT TO_LOOP_VX
# define BODY BODY_TO_VX
# define LOOP_NEED_FLAGS
# include <iconv/loop.c>
#else
# define TO_LOOP_VX NULL
#endif /* HAVE_TO_VX != 1 */
#if HAVE_TO_VX_CU == 1
#define BODY_TO_VX_CU \
{ \
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; \
asm volatile (".machine push\n\t" \
".machine \"z13\"\n\t" \
".machinemode \"zarch_nohighgprs\"\n\t" \
" vleif %%v20,127,0\n\t" /* element 0: 127 */ \
" vzero %%v21\n\t" \
" vleih %%v21,8192,0\n\t" /* element 0: > */ \
" vleih %%v21,-8192,2\n\t" /* element 1: =<> */ \
CONVERT_32BIT_SIZE_T ([R_INLEN]) \
CONVERT_32BIT_SIZE_T ([R_OUTLEN]) \
/* Loop which handles UTF-32 chars <= 0x7f. */ \
"0: clgijl %[R_INLEN],64,20f\n\t" \
" clgijl %[R_OUTLEN],16,20f\n\t" \
"1: vlm %%v16,%%v19,0(%[R_IN])\n\t" \
" lghi %[R_TMP],0\n\t" \
/* Shorten to byte values. */ \
" vpkf %%v23,%%v16,%%v17\n\t" \
" vpkf %%v24,%%v18,%%v19\n\t" \
" vpkh %%v23,%%v23,%%v24\n\t" \
/* Checking for values > 0x7f. */ \
" vstrcfs %%v22,%%v16,%%v20,%%v21\n\t" \
" jno 10f\n\t" \
" vstrcfs %%v22,%%v17,%%v20,%%v21\n\t" \
" jno 11f\n\t" \
" vstrcfs %%v22,%%v18,%%v20,%%v21\n\t" \
" jno 12f\n\t" \
" vstrcfs %%v22,%%v19,%%v20,%%v21\n\t" \
" jno 13f\n\t" \
/* Store 16bytes to outptr. */ \
" vst %%v23,0(%[R_OUT])\n\t" \
" aghi %[R_INLEN],-64\n\t" \
" aghi %[R_OUTLEN],-16\n\t" \
" la %[R_IN],64(%[R_IN])\n\t" \
" la %[R_OUT],16(%[R_OUT])\n\t" \
" clgijl %[R_INLEN],64,20f\n\t" \
" clgijl %[R_OUTLEN],16,20f\n\t" \
" j 1b\n\t" \
/* Found a value > 0x7f. */ \
"13: ahi %[R_TMP],4\n\t" \
"12: ahi %[R_TMP],4\n\t" \
"11: ahi %[R_TMP],4\n\t" \
"10: vlgvb %[R_I],%%v22,7\n\t" \
" srlg %[R_I],%[R_I],2\n\t" \
" agr %[R_I],%[R_TMP]\n\t" \
" je 20f\n\t" \
/* Store characters before invalid one... */ \
" slgr %[R_OUTLEN],%[R_I]\n\t" \
"15: aghi %[R_I],-1\n\t" \
" vstl %%v23,%[R_I],0(%[R_OUT])\n\t" \
/* ... and update pointers. */ \
" aghi %[R_I],1\n\t" \
" la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
" sllg %[R_I],%[R_I],2\n\t" \
" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
" slgr %[R_INLEN],%[R_I]\n\t" \
/* Handle multibyte utf8-char with convert instruction. */ \
"20: cu41 %[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] "=d" (tmp) \
, [R_I] "=a" (tmp2) \
, [R_RES] "+d" (result) \
: /* inputs */ \
[RES_OUT_FULL] "i" (__GCONV_FULL_OUTPUT) \
, [RES_IN_ILL] "i" (__GCONV_ILLEGAL_INPUT) \
: /* clobber list */ "memory", "cc" \
ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17") \
ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19") \
ASM_CLOBBER_VR ("v20") ASM_CLOBBER_VR ("v21") \
ASM_CLOBBER_VR ("v22") ASM_CLOBBER_VR ("v23") \
ASM_CLOBBER_VR ("v24") \
); \
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 hardware vector and utf-convert instructions. */
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
# define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
# define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
# define TO_LOOP_VX_CU __to_utf8_loop_vx_cu
# define LOOPFCT TO_LOOP_VX_CU
# define BODY BODY_TO_VX_CU
# define LOOP_NEED_FLAGS
# include <iconv/loop.c>
#else
# define TO_LOOP_VX_CU NULL
#endif /* HAVE_TO_VX_CU != 1 */
/* This file also exists in sysdeps/s390/multiarch/ which
generates ifunc resolvers for FROM/TO_LOOP functions
and includes iconv/skeleton.c afterwards. */
#if ! defined USE_MULTIARCH
# include <iconv/skeleton.c>
#endif
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