| /* Conversion between UTF-8 and UTF-32 BE/internal. |
| |
| This module uses the Z9-109 variants of the Convert Unicode |
| instructions. |
| Copyright (C) 1997-2018 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 |
