| /* Conversion between UTF-8 and UTF-16 - s390 version. |
| |
| 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 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; \ |
| \ |
| put16u (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 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 ("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 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 ("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 |
