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glibc/sysdeps/s390/utf8-utf16-z9.c

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/* Conversion between UTF-8 and UTF-16 - s390 version.
This module uses the Z9-109 variants of the Convert Unicode
instructions.
Copyright (C) 1997-2024 Free Software Foundation, Inc.
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
<https://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 4
#define MIN_NEEDED_TO 2
#define MAX_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-16 big endian byte order mark. */
#define BOM_UTF16 0xfeff
/* 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-16//") == 0);
if (__strcasecmp (step->__from_name, "ISO-10646/UTF8/") == 0
&& (__strcasecmp (step->__to_name, "UTF-16//") == 0
|| __strcasecmp (step->__to_name, "UTF-16BE//") == 0))
{
dir = from_utf8;
}
else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0
&& __strcasecmp (step->__to_name, "ISO-10646/UTF8/") == 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 UTF-16 Byte Order Mark. */ \
if (__glibc_unlikely (outbuf + 2 > outend)) \
return __GCONV_FULL_OUTPUT; \
\
put16 (outbuf, BOM_UTF16); \
outbuf += 2; \
}
/* Conversion function from UTF-8 to UTF-16. */
#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_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],32,20f\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 UTF-16. */ \
" vuplhb %%v18,%%v16\n\t" \
" la %[R_IN],16(%[R_IN])\n\t" \
" vupllb %%v19,%%v16\n\t" \
" aghi %[R_INLEN],-16\n\t" \
/* Store 32 bytes to buf_out. */ \
" vstm %%v18,%%v19,0(%[R_OUT])\n\t" \
" aghi %[R_OUTLEN],-32\n\t" \
" la %[R_OUT],32(%[R_OUT])\n\t" \
" clgijl %[R_INLEN],16,20f\n\t" \
" clgijl %[R_OUTLEN],32,20f\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],1\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" \
" vstl %%v18,%[R_TMP2],0(%[R_OUT])\n\t" \
" ahi %[R_TMP2],-16\n\t" \
" jl 11f\n\t" \
" vupllb %%v19,%%v16\n\t" \
" vstl %%v19,%[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" \
/* Handle multibyte utf8-char with convert instruction. */ \
"20: cu12 %[R_OUT],%[R_IN],1\n\t" \
" jo 0b\n\t" /* Try vector implementation 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 ("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 MAX_NEEDED_OUTPUT MAX_NEEDED_TO
# define FROM_LOOP_VX __from_utf8_loop_vx
# define LOOPFCT FROM_LOOP_VX
# define LOOP_NEED_FLAGS
# define BODY BODY_FROM_VX
# include <iconv/loop.c>
#else
# define FROM_LOOP_VX NULL
#endif /* HAVE_FROM_VX != 1 */
#if HAVE_FROM_CU == 1
# define BODY_FROM_ETF3EH BODY_FROM_HW (HARDWARE_CONVERT ("cu12 %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 MAX_NEEDED_OUTPUT MAX_NEEDED_TO
# define FROM_LOOP_CU __from_utf8_loop_etf3eh
# define LOOPFCT FROM_LOOP_CU
# define LOOP_NEED_FLAGS
# define BODY BODY_FROM_ETF3EH
# include <iconv/loop.c>
#else
# define FROM_LOOP_CU NULL
#endif /* HAVE_FROM_CU != 1 */
#if HAVE_FROM_C == 1
/* The software implementation is based on the code in gconv_simple.c. */
# define BODY_FROM_C \
{ \
/* Next input byte. */ \
uint16_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; \
} \
\
if (cnt == 4) \
{ \
/* For 4 byte UTF-8 chars two UTF-16 chars (high and \
low) are needed. */ \
uint16_t zabcd, high, low; \
\
if (__glibc_unlikely (outptr + 4 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
/* Check if tail-bytes >= 0x80, < 0xc0. */ \
for (i = 1; i < cnt; ++i) \
{ \
if ((inptr[i] & 0xc0) != 0x80) \
/* This is an illegal encoding. */ \
goto errout; \
} \
\
/* See Principles of Operations cu12. */ \
zabcd = (((inptr[0] & 0x7) << 2) \
| ((inptr[1] & 0x30) >> 4)) - 1; \
\
/* z-bit must be zero after subtracting 1. */ \
if (zabcd & 0x10) \
STANDARD_FROM_LOOP_ERR_HANDLER (4) \
\
high = (uint16_t)(0xd8 << 8); /* high surrogate id */ \
high |= zabcd << 6; /* abcd bits */ \
high |= (inptr[1] & 0xf) << 2; /* efgh bits */ \
high |= (inptr[2] & 0x30) >> 4; /* ij bits */ \
\
low = (uint16_t)(0xdc << 8); /* low surrogate id */ \
low |= ((uint16_t)inptr[2] & 0xc) << 6; /* kl bits */ \
low |= (inptr[2] & 0x3) << 6; /* mn bits */ \
low |= inptr[3] & 0x3f; /* opqrst bits */ \
\
put16 (outptr, high); \
outptr += 2; \
put16 (outptr, low); \
outptr += 2; \
inptr += 4; \
continue; \
} \
else \
{ \
/* Read the possible remaining bytes. */ \
for (i = 1; i < cnt; ++i) \
{ \
uint16_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)) \
{ \
/* This is an illegal encoding. */ \
goto errout; \
} \
\
inptr += cnt; \
} \
} \
/* Now adjust the pointers and store the result. */ \
*((uint16_t *) outptr) = ch; \
outptr += sizeof (uint16_t); \
}
/* Generate loop-function with software implementation. */
# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
# define MAX_NEEDED_INPUT MAX_NEEDED_FROM
# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
# define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
# define FROM_LOOP_C __from_utf8_loop_c
# define LOOPFCT FROM_LOOP_C
# define LOOP_NEED_FLAGS
# define BODY BODY_FROM_C
# include <iconv/loop.c>
#else
# define FROM_LOOP_C NULL
#endif /* HAVE_FROM_C != 1 */
/* Conversion from UTF-16 to UTF-8. */
#if HAVE_TO_C == 1
/* The software routine is based on the functionality of the S/390
hardware instruction (cu21) as described in the Principles of
Operation. */
# define BODY_TO_C \
{ \
uint16_t c = get16 (inptr); \
\
if (__glibc_likely (c <= 0x007f)) \
{ \
/* Single byte UTF-8 char. */ \
*outptr = c & 0xff; \
outptr++; \
} \
else if (c >= 0x0080 && c <= 0x07ff) \
{ \
/* Two byte UTF-8 char. */ \
\
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
outptr[0] = 0xc0; \
outptr[0] |= c >> 6; \
\
outptr[1] = 0x80; \
outptr[1] |= c & 0x3f; \
\
outptr += 2; \
} \
else if ((c >= 0x0800 && c <= 0xd7ff) || c > 0xdfff) \
{ \
/* Three byte UTF-8 char. */ \
\
if (__glibc_unlikely (outptr + 3 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
outptr[0] = 0xe0; \
outptr[0] |= c >> 12; \
\
outptr[1] = 0x80; \
outptr[1] |= (c >> 6) & 0x3f; \
\
outptr[2] = 0x80; \
outptr[2] |= c & 0x3f; \
\
outptr += 3; \
} \
else if (c >= 0xd800 && c <= 0xdbff) \
{ \
/* Four byte UTF-8 char. */ \
uint16_t low, uvwxy; \
\
if (__glibc_unlikely (outptr + 4 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
if (__glibc_unlikely (inptr + 4 > inend)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
inptr += 2; \
low = get16 (inptr); \
\
if ((low & 0xfc00) != 0xdc00) \
{ \
inptr -= 2; \
STANDARD_TO_LOOP_ERR_HANDLER (2); \
} \
uvwxy = ((c >> 6) & 0xf) + 1; \
outptr[0] = 0xf0; \
outptr[0] |= uvwxy >> 2; \
\
outptr[1] = 0x80; \
outptr[1] |= (uvwxy << 4) & 0x30; \
outptr[1] |= (c >> 2) & 0x0f; \
\
outptr[2] = 0x80; \
outptr[2] |= (c & 0x03) << 4; \
outptr[2] |= (low >> 6) & 0x0f; \
\
outptr[3] = 0x80; \
outptr[3] |= low & 0x3f; \
\
outptr += 4; \
} \
else \
{ \
STANDARD_TO_LOOP_ERR_HANDLER (2); \
} \
inptr += 2; \
}
/* Generate loop-function with software implementation. */
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
# define MAX_NEEDED_INPUT MAX_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
# 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" \
/* Setup to check for values <= 0x7f. */ \
" 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 <=0x7f. */ \
"0: clgijl %[R_INLEN],32,2f\n\t" \
" clgijl %[R_OUTLEN],16,2f\n\t" \
"1: vlm %%v16,%%v17,0(%[R_IN])\n\t" \
" lghi %[R_TMP2],0\n\t" \
/* Check for > 1byte UTF-8 chars. */ \
" vstrchs %%v19,%%v16,%%v30,%%v31\n\t" \
" jno 10f\n\t" /* Jump away if not all bytes are 1byte \
UTF8 chars. */ \
" vstrchs %%v19,%%v17,%%v30,%%v31\n\t" \
" jno 11f\n\t" /* Jump away if not all bytes are 1byte \
UTF8 chars. */ \
/* Shorten to UTF-8. */ \
" vpkh %%v18,%%v16,%%v17\n\t" \
" la %[R_IN],32(%[R_IN])\n\t" \
" aghi %[R_INLEN],-32\n\t" \
/* Store 16 bytes to buf_out. */ \
" vst %%v18,0(%[R_OUT])\n\t" \
" aghi %[R_OUTLEN],-16\n\t" \
" la %[R_OUT],16(%[R_OUT])\n\t" \
" clgijl %[R_INLEN],32,2f\n\t" \
" clgijl %[R_OUTLEN],16,2f\n\t" \
" j 1b\n\t" \
/* Setup to check for ch > 0x7f. (v30, v31) */ \
"9: .short 0x7f,0x7f,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
" .short 0x2000,0x2000,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
/* At least one byte is > 0x7f. \
Store the preceding 1-byte chars. */ \
"11: lghi %[R_TMP2],16\n\t" /* match was found in v17. */ \
"10:\n\t" \
" vlgvb %[R_TMP],%%v19,7\n\t" \
/* Shorten to UTF-8. */ \
" vpkh %%v18,%%v16,%%v17\n\t" \
" ar %[R_TMP],%[R_TMP2]\n\t" /* Number of in bytes. */ \
" 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 13f\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" \
"13: \n\t" \
/* Calculate remaining uint16_t values in loaded vrs. */ \
" lghi %[R_TMP2],16\n\t" \
" slgr %[R_TMP2],%[R_TMP3]\n\t" \
" llh %[R_TMP],0(%[R_IN])\n\t" \
" aghi %[R_INLEN],-2\n\t" \
" j 22f\n\t" \
/* Handle remaining bytes. */ \
"2: \n\t" \
/* Zero, one or more bytes available? */ \
" clgfi %[R_INLEN],1\n\t" \
" locghie %[R_RES],%[RES_IN_FULL]\n\t" /* Only one byte. */ \
" jle 99f\n\t" /* End if less than two bytes. */ \
/* Calculate remaining uint16_t values in inptr. */ \
" srlg %[R_TMP2],%[R_INLEN],1\n\t" \
/* Handle multibyte utf8-char. */ \
"20: llh %[R_TMP],0(%[R_IN])\n\t" \
" aghi %[R_INLEN],-2\n\t" \
/* Test if ch is 1-byte 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],2(%[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 2-byte 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" \
" la %[R_IN],2(%[R_IN])\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_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],0xd7ff\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" \
" la %[R_IN],2(%[R_IN])\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. */ \
" stcm %[R_TMP3],7,0(%[R_OUT])\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],0xdfff\n\t" \
" jh 33b\n\t" /* Handle this 3-byte UTF-8 char. */ \
" clfi %[R_TMP],0xdbff\n\t" \
" locghih %[R_RES],%[RES_IN_ILL]\n\t" \
" jh 99f\n\t" /* Jump away if this is a low surrogate \
without a preceding high surrogate. */ \
/* Handle 4-byte UTF-8 char. */ \
"34: slgfi %[R_OUTLEN],4\n\t" \
" jl 90f \n\t" \
" slgfi %[R_INLEN],2\n\t" \
" locghil %[R_RES],%[RES_IN_FULL]\n\t" \
" jl 99f\n\t" /* Jump away if low surrogate is missing. */ \
" llilf %[R_TMP3],0xf0808080\n\t" \
" aghi %[R_TMP],0x40\n\t" \
" risbgn %[R_TMP3],%[R_TMP],37,39,16\n\t" /* 1. byte: uvw */ \
" risbgn %[R_TMP3],%[R_TMP],42,43,14\n\t" /* 2. byte: xy */ \
" risbgn %[R_TMP3],%[R_TMP],44,47,14\n\t" /* 2. byte: efgh */ \
" risbgn %[R_TMP3],%[R_TMP],50,51,12\n\t" /* 3. byte: ij */ \
" llh %[R_TMP],2(%[R_IN])\n\t" /* Load low surrogate. */ \
" risbgn %[R_TMP3],%[R_TMP],52,55,2\n\t" /* 3. byte: klmn */ \
" risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 4. byte: opqrst */ \
" nilf %[R_TMP],0xfc00\n\t" \
" clfi %[R_TMP],0xdc00\n\t" /* Check if it starts with 0xdc00. */ \
" locghine %[R_RES],%[RES_IN_ILL]\n\t" \
" jne 99f\n\t" /* Jump away if low surrogate is invalid. */ \
" st %[R_TMP3],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 20b\n\t" \
" j 0b\n\t" /* Switch to vx-loop. */ \
/* Exit with __GCONV_FULL_OUTPUT. */ \
"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] "=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_TO_LOOP_ERR_HANDLER (2); \
}
/* Generate loop-function with vector implementation. */
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
# define MAX_NEEDED_INPUT MAX_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, tmp3; \
asm volatile (".machine push\n\t" \
".machine \"z13\"\n\t" \
".machinemode \"zarch_nohighgprs\"\n\t" \
/* Setup to check for values <= 0x7f. */ \
" 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 <=0x7f. */ \
"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" \
/* Check for > 1byte UTF-8 chars. */ \
" vstrchs %%v19,%%v16,%%v30,%%v31\n\t" \
" jno 10f\n\t" /* Jump away if not all bytes are 1byte \
UTF8 chars. */ \
" vstrchs %%v19,%%v17,%%v30,%%v31\n\t" \
" jno 11f\n\t" /* Jump away if not all bytes are 1byte \
UTF8 chars. */ \
/* Shorten to UTF-8. */ \
" vpkh %%v18,%%v16,%%v17\n\t" \
" la %[R_IN],32(%[R_IN])\n\t" \
" aghi %[R_INLEN],-32\n\t" \
/* Store 16 bytes to buf_out. */ \
" vst %%v18,0(%[R_OUT])\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 > 0x7f. (v30, v31) */ \
"9: .short 0x7f,0x7f,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
" .short 0x2000,0x2000,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \
/* At least one byte is > 0x7f. \
Store the preceding 1-byte chars. */ \
"11: lghi %[R_TMP2],16\n\t" /* match was found in v17. */ \
"10: vlgvb %[R_TMP],%%v19,7\n\t" \
/* Shorten to UTF-8. */ \
" vpkh %%v18,%%v16,%%v17\n\t" \
" ar %[R_TMP],%[R_TMP2]\n\t" /* Number of in bytes. */ \
" 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: cu21 %[R_OUT],%[R_IN],1\n\t" \
" jo 0b\n\t" /* Try vector implementation 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 ("v30") ASM_CLOBBER_VR ("v31") \
); \
inptr = pInput; \
outptr = pOutput; \
\
if (__glibc_likely (inlen == 0) \
|| result == __GCONV_FULL_OUTPUT) \
break; \
if (inlen == 1) \
{ \
/* Input does not contain a complete utf16 character. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
else if (result != __GCONV_ILLEGAL_INPUT) \
{ \
/* Input is >= 2 and < 4 bytes (as cu21 would have processed \
a possible next utf16 character) and not illegal. \
=> we have a single high surrogate at end of input. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
STANDARD_TO_LOOP_ERR_HANDLER (2); \
}
/* Generate loop-function with vector and utf-convert instructions. */
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
# define MAX_NEEDED_INPUT MAX_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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