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glibc/sysdeps/s390/utf16-utf32-z9.c
Stefan Liebler 7949f552cb S390: Don't use r11 for cu-instructions as used as frame-pointer. [BZ# 32192] 
Building the s390 specific iconv modules - utf16-utf32-z9.c, utf8-utf32-z9.c
and utf8-utf16-z9.c - with -fno-omit-frame-pointer leads to a build error
"error: %r11 cannot be used in 'asm' here" as r11 is needed as frame-pointer.

The cuXY-instructions need two even-odd register pairs. Therefore the register
pinning is used. This patch just uses a different register pair.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
2024-10-08 10:13:02 +02:00

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/* Conversion between UTF-16 and UTF-32 BE/internal.
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. */
#define HAVE_FROM_C 1
#define FROM_LOOP_DEFAULT FROM_LOOP_C
#define HAVE_TO_C 1
#define TO_LOOP_DEFAULT TO_LOOP_C
#if defined HAVE_S390_VX_ASM_SUPPORT && defined USE_MULTIARCH
# define HAVE_FROM_VX 1
# define HAVE_FROM_VX_CU 1
# define HAVE_TO_VX 1
# define HAVE_TO_VX_CU 1
#else
# define HAVE_FROM_VX 0
# define HAVE_FROM_VX_CU 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
/* 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_LOOP_DEFAULT
#define TO_LOOP TO_LOOP_DEFAULT
#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);
}
#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; \
\
put16 (outbuf, BOM_UTF16); \
outbuf += 2; \
} \
else \
{ \
/* Emit the UTF-32 Byte Order Mark. */ \
if (__glibc_unlikely (outbuf + 4 > outend)) \
return __GCONV_FULL_OUTPUT; \
\
put32 (outbuf, BOM_UTF32); \
outbuf += 4; \
} \
}
/* Conversion function from UTF-16 to UTF-32 internal/BE. */
#if HAVE_FROM_C == 1
/* 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; \
}
/* 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
# define FROM_LOOP_C __from_utf16_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 */
#if HAVE_FROM_VX == 1
# 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 one 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" \
" slgr %[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 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 FROM_LOOP_VX __from_utf16_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_VX_CU == 1
#define BODY_FROM_VX_CU \
{ \
register const unsigned char* pInput asm ("8") = inptr; \
register size_t inlen asm ("9") = inend - inptr; \
register unsigned char* pOutput asm ("6") = outptr; \
register size_t outlen asm ("7") = 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],16,20f\n\t" \
" clgijl %[R_OUTLEN],32,20f\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],16,20f\n\t" \
" clgijl %[R_OUTLEN],32,20f\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 one 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 20f\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" \
/* Handles UTF16 surrogates with convert instruction. */ \
"20: cu24 %[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 cu24 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_FROM_LOOP_ERR_HANDLER (2); \
}
/* 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_CU __from_utf16_loop_vx_cu
# define LOOPFCT FROM_LOOP_VX_CU
# define LOOP_NEED_FLAGS
# define BODY BODY_FROM_VX_CU
# include <iconv/loop.c>
#else
# define FROM_LOOP_VX_CU NULL
#endif /* HAVE_FROM_VX_CU != 1 */
/* Conversion from UTF-32 internal/BE to UTF-16. */
#if HAVE_TO_C == 1
/* 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 > 0xdfff && 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; \
}
/* 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_utf16_loop_c
# define LOOPFCT TO_LOOP_C
# define LOOP_NEED_FLAGS
# define BODY BODY_TO_C
# 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 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-32 chars \
ch < 0xd800 || (ch > 0xdfff && ch < 0x10000). */ \
"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" \
/* 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],32,2f\n\t" \
" clgijl %[R_OUTLEN],16,2f\n\t" \
" j 1b\n\t" \
/* Calculate remaining uint32_t values in inptr. */ \
"2: \n\t" \
" clgije %[R_INLEN],0,99f\n\t" \
" clgijl %[R_INLEN],4,92f\n\t" \
" srlg %[R_TMP2],%[R_INLEN],2\n\t" \
" j 20f\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 12f\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" \
/* Calculate remaining uint32_t values in vrs. */ \
"12: lghi %[R_TMP2],8\n\t" \
" srlg %[R_TMP3],%[R_TMP3],1\n\t" \
" slgr %[R_TMP2],%[R_TMP3]\n\t" \
/* Handle remaining UTF-32 characters. */ \
"20: l %[R_TMP],0(%[R_IN])\n\t" \
" aghi %[R_INLEN],-4\n\t" \
/* Test if ch is 2byte UTF-16 char. */ \
" clfi %[R_TMP],0xffff\n\t" \
" jh 21f\n\t" \
/* Handle 2 byte UTF16 char. */ \
" lgr %[R_TMP3],%[R_TMP]\n\t" \
" nilf %[R_TMP],0xf800\n\t" \
" clfi %[R_TMP],0xd800\n\t" \
" je 91f\n\t" /* Do not accept UTF-16 surrogates. */ \
" slgfi %[R_OUTLEN],2\n\t" \
" jl 90f \n\t" \
" 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 4byte UTF-16 char. */ \
"21: clfi %[R_TMP],0x10ffff\n\t" \
" jh 91f\n\t" /* ch > 0x10ffff is not allowed! */ \
/* Handle 4 byte UTF16 char. */ \
" slgfi %[R_OUTLEN],4\n\t" \
" jl 90f \n\t" \
" slfi %[R_TMP],0x10000\n\t" /* zabcd = uvwxy - 1. */ \
" llilf %[R_TMP3],0xd800dc00\n\t" \
" la %[R_IN],4(%[R_IN])\n\t" \
" risbgn %[R_TMP3],%[R_TMP],38,47,6\n\t" /* High surrogate. */ \
" risbgn %[R_TMP3],%[R_TMP],54,63,0\n\t" /* Low surrogate. */ \
" st %[R_TMP3],0(%[R_OUT])\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] "=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 (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_utf16_loop_vx
# define LOOPFCT TO_LOOP_VX
# define LOOP_NEED_FLAGS
# define BODY BODY_TO_VX
# 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 ("6") = outptr; \
register size_t outlen asm ("7") = 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-32 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 one 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 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 < 4) \
{ \
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_utf16_loop_vx_cu
# define LOOPFCT TO_LOOP_VX_CU
# define LOOP_NEED_FLAGS
# define BODY BODY_TO_VX_CU
# 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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