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/* Generic conversion to and from 8bit charsets - S390 version.
Copyright (C) 2016-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#if defined HAVE_S390_VX_ASM_SUPPORT
# if defined HAVE_S390_VX_GCC_SUPPORT
# define ASM_CLOBBER_VR(NR) , NR
# else
# define ASM_CLOBBER_VR(NR)
# endif
/* Generate the conversion loop routines without vector instructions as
fallback, if vector instructions aren't available at runtime. */
# define IGNORE_ICONV_SKELETON
# define from_generic __from_generic_c
# define to_generic __to_generic_c
# include "iconvdata/8bit-generic.c"
# undef IGNORE_ICONV_SKELETON
# undef from_generic
# undef to_generic
/* Generate the converion routines with vector instructions. The vector
routines can only be used with charsets where the maximum UCS4 value
fits in 1 byte size. Then the hardware translate-instruction is used
to translate between multiple generic characters and "1 byte UCS4"
characters at once. The vector instructions are used to convert between
the "1 byte UCS4" and UCS4. */
# include <ifunc-resolve.h>
# undef FROM_LOOP
# undef TO_LOOP
# define FROM_LOOP __from_generic_vx
# define TO_LOOP __to_generic_vx
# define MIN_NEEDED_FROM 1
# define MIN_NEEDED_TO 4
# define ONE_DIRECTION 0
/* First define the conversion function from the 8bit charset to UCS4. */
# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
# define LOOPFCT FROM_LOOP
# define BODY_FROM_ORIG \
{ \
uint32_t ch = to_ucs4[*inptr]; \
\
if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && *inptr != '\0') \
{ \
/* This is an illegal character. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
\
put32 (outptr, ch); \
outptr += 4; \
++inptr; \
}
# define BODY \
{ \
if (__builtin_expect (inend - inptr < 16, 1) \
|| outend - outptr < 64) \
/* Convert remaining bytes with c code. */ \
BODY_FROM_ORIG \
else \
{ \
/* Convert 16 ... 256 bytes at once with tr-instruction. */ \
size_t index; \
char buf[256]; \
size_t loop_count = (inend - inptr) / 16; \
if (loop_count > (outend - outptr) / 64) \
loop_count = (outend - outptr) / 64; \
if (loop_count > 16) \
loop_count = 16; \
__asm__ volatile (".machine push\n\t" \
".machine \"z13\"\n\t" \
".machinemode \"zarch_nohighgprs\"\n\t" \
" sllk %[R_I],%[R_LI],4\n\t" \
" ahi %[R_I],-1\n\t" \
/* Execute mvc and tr with correct len. */ \
" exrl %[R_I],21f\n\t" \
" exrl %[R_I],22f\n\t" \
/* Post-processing. */ \
" lghi %[R_I],0\n\t" \
" vzero %%v0\n\t" \
"0: \n\t" \
/* Find invalid character - value is zero. */ \
" vl %%v16,0(%[R_I],%[R_BUF])\n\t" \
" vceqbs %%v23,%%v0,%%v16\n\t" \
" jle 10f\n\t" \
"1: \n\t" \
/* Enlarge to UCS4. */ \
" vuplhb %%v17,%%v16\n\t" \
" vupllb %%v18,%%v16\n\t" \
" vuplhh %%v19,%%v17\n\t" \
" vupllh %%v20,%%v17\n\t" \
" vuplhh %%v21,%%v18\n\t" \
" vupllh %%v22,%%v18\n\t" \
/* Store 64bytes to buf_out. */ \
" vstm %%v19,%%v22,0(%[R_OUT])\n\t" \
" aghi %[R_I],16\n\t" \
" la %[R_OUT],64(%[R_OUT])\n\t" \
" brct %[R_LI],0b\n\t" \
" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
" j 20f\n\t" \
"21: mvc 0(1,%[R_BUF]),0(%[R_IN])\n\t" \
"22: tr 0(1,%[R_BUF]),0(%[R_TBL])\n\t" \
/* Possibly invalid character found. */ \
"10: \n\t" \
/* Test if input was zero, too. */ \
" vl %%v24,0(%[R_I],%[R_IN])\n\t" \
" vceqb %%v24,%%v0,%%v24\n\t" \
/* Zeros in buf (v23) and inptr (v24) are marked \
with one bits. After xor, invalid characters \
are marked as one bits. Proceed, if no \
invalid characters are found. */ \
" vx %%v24,%%v23,%%v24\n\t" \
" vfenebs %%v24,%%v24,%%v0\n\t" \
" jo 1b\n\t" \
/* Found an invalid translation. \
Store the preceding chars. */ \
" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
" vlgvb %[R_I],%%v24,7\n\t" \
" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
" sll %[R_I],2\n\t" \
" ahi %[R_I],-1\n\t" \
" jl 20f\n\t" \
" lgr %[R_LI],%[R_I]\n\t" \
" vuplhb %%v17,%%v16\n\t" \
" vuplhh %%v19,%%v17\n\t" \
" vstl %%v19,%[R_I],0(%[R_OUT])\n\t" \
" ahi %[R_I],-16\n\t" \
" jl 11f\n\t" \
" vupllh %%v20,%%v17\n\t" \
" vstl %%v20,%[R_I],16(%[R_OUT])\n\t" \
" ahi %[R_I],-16\n\t" \
" jl 11f\n\t" \
" vupllb %%v18,%%v16\n\t" \
" vuplhh %%v21,%%v18\n\t" \
" vstl %%v21,%[R_I],32(%[R_OUT])\n\t" \
" ahi %[R_I],-16\n\t" \
" jl 11f\n\t" \
" vupllh %%v22,%%v18\n\t" \
" vstl %%v22,%[R_I],48(%[R_OUT])\n\t" \
"11: \n\t" \
" la %[R_OUT],1(%[R_LI],%[R_OUT])\n\t" \
"20: \n\t" \
".machine pop" \
: /* outputs */ [R_IN] "+a" (inptr) \
, [R_OUT] "+a" (outptr), [R_I] "=&a" (index) \
, [R_LI] "+a" (loop_count) \
: /* inputs */ [R_BUF] "a" (buf) \
, [R_TBL] "a" (to_ucs1) \
: /* clobber list*/ "memory", "cc" \
ASM_CLOBBER_VR ("v0") 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") \
); \
/* Error occured? */ \
if (loop_count != 0) \
{ \
/* Found an invalid character! */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
} \
}
# define LOOP_NEED_FLAGS
# include <iconv/loop.c>
/* Next, define the other direction - from UCS4 to 8bit charset. */
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
# define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
# define LOOPFCT TO_LOOP
# define BODY_TO_ORIG \
{ \
uint32_t ch = get32 (inptr); \
\
if (__builtin_expect (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]), 0)\
|| (__builtin_expect (from_ucs4[ch], '\1') == '\0' && ch != 0)) \
{ \
UNICODE_TAG_HANDLER (ch, 4); \
\
/* This is an illegal character. */ \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
*outptr++ = from_ucs4[ch]; \
inptr += 4; \
}
# define BODY \
{ \
if (__builtin_expect (inend - inptr < 64, 1) \
|| outend - outptr < 16) \
/* Convert remaining bytes with c code. */ \
BODY_TO_ORIG \
else \
{ \
/* Convert 64 ... 1024 bytes at once with tr-instruction. */ \
size_t index, tmp; \
char buf[256]; \
size_t loop_count = (inend - inptr) / 64; \
uint32_t max = sizeof (from_ucs4) / sizeof (from_ucs4[0]); \
if (loop_count > (outend - outptr) / 16) \
loop_count = (outend - outptr) / 16; \
if (loop_count > 16) \
loop_count = 16; \
size_t remaining_loop_count = loop_count; \
/* Step 1: Check for ch>=max, ch == 0 and shorten to bytes. \
(ch == 0 is no error, but is handled differently) */ \
__asm__ volatile (".machine push\n\t" \
".machine \"z13\"\n\t" \
".machinemode \"zarch_nohighgprs\"\n\t" \
/* Setup to check for ch >= max. */ \
" vzero %%v21\n\t" \
" vleih %%v21,-24576,0\n\t" /* element 0: > */ \
" vleih %%v21,-8192,2\n\t" /* element 1: =<> */ \
" vlvgf %%v20,%[R_MAX],0\n\t" /* element 0: val */ \
/* Process in 64byte - 16 characters blocks. */ \
" lghi %[R_I],0\n\t" \
" lghi %[R_TMP],0\n\t" \
"0: \n\t" \
" vlm %%v16,%%v19,0(%[R_IN])\n\t" \
/* Test for ch >= max and ch == 0. */ \
" vstrczfs %%v22,%%v16,%%v20,%%v21\n\t" \
" jno 10f\n\t" \
" vstrczfs %%v22,%%v17,%%v20,%%v21\n\t" \
" jno 11f\n\t" \
" vstrczfs %%v22,%%v18,%%v20,%%v21\n\t" \
" jno 12f\n\t" \
" vstrczfs %%v22,%%v19,%%v20,%%v21\n\t" \
" jno 13f\n\t" \
/* Shorten to byte values. */ \
" vpkf %%v16,%%v16,%%v17\n\t" \
" vpkf %%v18,%%v18,%%v19\n\t" \
" vpkh %%v16,%%v16,%%v18\n\t" \
/* Store 16bytes to buf. */ \
" vst %%v16,0(%[R_I],%[R_BUF])\n\t" \
/* Loop until all blocks are processed. */ \
" la %[R_IN],64(%[R_IN])\n\t" \
" aghi %[R_I],16\n\t" \
" brct %[R_LI],0b\n\t" \
" j 20f\n\t" \
/* Found error ch >= max or ch == 0. */ \
"13: aghi %[R_TMP],4\n\t" \
"12: aghi %[R_TMP],4\n\t" \
"11: aghi %[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" \
"20: \n\t" \
".machine pop" \
: /* outputs */ [R_IN] "+a" (inptr) \
, [R_I] "=&a" (index) \
, [R_TMP] "=d" (tmp) \
, [R_LI] "+d" (remaining_loop_count) \
: /* inputs */ [R_BUF] "a" (buf) \
, [R_MAX] "d" (max) \
: /* 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") \
); \
/* Error occured in step 1? An error (ch >= max || ch == 0) \
occured, if remaining_loop_count > 0. The error occured \
at character-index (index) after already processed blocks. */ \
loop_count -= remaining_loop_count; \
if (loop_count > 0) \
{ \
/* Step 2: Translate already processed blocks in buf and \
check for errors (from_ucs4[ch] == 0). */ \
__asm__ volatile (".machine push\n\t" \
".machine \"z13\"\n\t" \
".machinemode \"zarch_nohighgprs\"\n\t" \
" sllk %[R_I],%[R_LI],4\n\t" \
" ahi %[R_I],-1\n\t" \
/* Execute tr with correct len. */ \
" exrl %[R_I],21f\n\t" \
/* Post-processing. */ \
" lghi %[R_I],0\n\t" \
"0: \n\t" \
/* Find invalid character - value == 0. */ \
" vl %%v16,0(%[R_I],%[R_BUF])\n\t" \
" vfenezbs %%v17,%%v16,%%v16\n\t" \
" je 10f\n\t" \
/* Store 16bytes to buf_out. */ \
" vst %%v16,0(%[R_I],%[R_OUT])\n\t" \
" aghi %[R_I],16\n\t" \
" brct %[R_LI],0b\n\t" \
" la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
" j 20f\n\t" \
"21: tr 0(1,%[R_BUF]),0(%[R_TBL])\n\t" \
/* Found an error: from_ucs4[ch] == 0. */ \
"10: la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
" vlgvb %[R_I],%%v17,7\n\t" \
"20: \n\t" \
".machine pop" \
: /* outputs */ [R_OUT] "+a" (outptr) \
, [R_I] "=&a" (tmp) \
, [R_LI] "+d" (loop_count) \
: /* inputs */ [R_BUF] "a" (buf) \
, [R_TBL] "a" (from_ucs4) \
: /* clobber list*/ "memory", "cc" \
ASM_CLOBBER_VR ("v16") \
ASM_CLOBBER_VR ("v17") \
); \
/* Error occured in processed bytes of step 2? \
Thus possible error in step 1 is obselete.*/ \
if (tmp < 16) \
{ \
index = tmp; \
inptr -= loop_count * 64; \
} \
} \
/* Error occured in step 1/2? */ \
if (index < 16) \
{ \
/* Found an invalid character (see step 2) or zero \
(see step 1) at index! Convert the chars before index \
manually. If there is a zero at index detected by step 1, \
there could be invalid characters before this zero. */ \
int i; \
uint32_t ch; \
for (i = 0; i < index; i++) \
{ \
ch = get32 (inptr); \
if (__builtin_expect (from_ucs4[ch], '\1') == '\0') \
break; \
*outptr++ = from_ucs4[ch]; \
inptr += 4; \
} \
if (i == index) \
{ \
ch = get32 (inptr); \
if (ch == 0) \
{ \
/* This is no error, but handled differently. */ \
*outptr++ = from_ucs4[ch]; \
inptr += 4; \
continue; \
} \
} \
\
/* iconv/loop.c disables -Wmaybe-uninitialized for a false \
positive warning in this code with -Os and has a \
comment referencing this code accordingly. Updates in \
one place may require updates in the other. */ \
UNICODE_TAG_HANDLER (ch, 4); \
\
/* This is an illegal character. */ \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
} \
}
# define LOOP_NEED_FLAGS
# include <iconv/loop.c>
/* Generate ifunc'ed loop function. */
s390_libc_ifunc_expr (__from_generic_c, __from_generic,
(sizeof (from_ucs4) / sizeof (from_ucs4[0]) <= 256
&& hwcap & HWCAP_S390_VX)
? __from_generic_vx
: __from_generic_c);
s390_libc_ifunc_expr (__to_generic_c, __to_generic,
(sizeof (from_ucs4) / sizeof (from_ucs4[0]) <= 256
&& hwcap & HWCAP_S390_VX)
? __to_generic_vx
: __to_generic_c);
strong_alias (__to_generic_c_single, __to_generic_single)
# undef FROM_LOOP
# undef TO_LOOP
# define FROM_LOOP __from_generic
# define TO_LOOP __to_generic
# include <iconv/skeleton.c>
#else
/* Generate this module without ifunc if build environment lacks vector
support. Instead the common 8bit-generic.c is used. */
# include "iconvdata/8bit-generic.c"
#endif /* !defined HAVE_S390_VX_ASM_SUPPORT */
|
