diff options
Diffstat (limited to 'sysdeps/s390/multiarch/8bit-generic.c')
| -rw-r--r-- | sysdeps/s390/multiarch/8bit-generic.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/sysdeps/s390/multiarch/8bit-generic.c b/sysdeps/s390/multiarch/8bit-generic.c new file mode 100644 index 0000000000..d608beaa62 --- /dev/null +++ b/sysdeps/s390/multiarch/8bit-generic.c @@ -0,0 +1,402 @@ +/* Generic conversion to and from 8bit charsets - S390 version. + Copyright (C) 2016-2018 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 + <http://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 */ |