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403 lines
14 KiB
C
403 lines
14 KiB
C
/* Generic conversion to and from 8bit charsets - S390 version.
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Copyright (C) 2016-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT
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# if defined HAVE_S390_VX_GCC_SUPPORT
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# define ASM_CLOBBER_VR(NR) , NR
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# else
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# define ASM_CLOBBER_VR(NR)
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# endif
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/* Generate the conversion loop routines without vector instructions as
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fallback, if vector instructions aren't available at runtime. */
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# define IGNORE_ICONV_SKELETON
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# define from_generic __from_generic_c
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# define to_generic __to_generic_c
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# include "iconvdata/8bit-generic.c"
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# undef IGNORE_ICONV_SKELETON
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# undef from_generic
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# undef to_generic
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/* Generate the conversion routines with vector instructions. The vector
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routines can only be used with charsets where the maximum UCS4 value
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fits in 1 byte size. Then the hardware translate-instruction is used
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to translate between multiple generic characters and "1 byte UCS4"
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characters at once. The vector instructions are used to convert between
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the "1 byte UCS4" and UCS4. */
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# include <ifunc-resolve.h>
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# undef FROM_LOOP
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# undef TO_LOOP
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# define FROM_LOOP __from_generic_vx
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# define TO_LOOP __to_generic_vx
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# define MIN_NEEDED_FROM 1
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# define MIN_NEEDED_TO 4
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# define ONE_DIRECTION 0
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/* First define the conversion function from the 8bit charset to UCS4. */
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# define MIN_NEEDED_INPUT MIN_NEEDED_FROM
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# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
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# define LOOPFCT FROM_LOOP
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# define BODY_FROM_ORIG \
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{ \
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uint32_t ch = to_ucs4[*inptr]; \
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\
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if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && *inptr != '\0') \
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{ \
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/* This is an illegal character. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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} \
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\
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put32 (outptr, ch); \
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outptr += 4; \
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++inptr; \
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}
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# define BODY \
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{ \
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if (__builtin_expect (inend - inptr < 16, 1) \
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|| outend - outptr < 64) \
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/* Convert remaining bytes with c code. */ \
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BODY_FROM_ORIG \
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else \
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{ \
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/* Convert 16 ... 256 bytes at once with tr-instruction. */ \
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size_t index; \
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char buf[256]; \
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size_t loop_count = (inend - inptr) / 16; \
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if (loop_count > (outend - outptr) / 64) \
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loop_count = (outend - outptr) / 64; \
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if (loop_count > 16) \
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loop_count = 16; \
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__asm__ volatile (".machine push\n\t" \
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".machine \"z13\"\n\t" \
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".machinemode \"zarch_nohighgprs\"\n\t" \
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" sllk %[R_I],%[R_LI],4\n\t" \
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" ahi %[R_I],-1\n\t" \
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/* Execute mvc and tr with correct len. */ \
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" exrl %[R_I],21f\n\t" \
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" exrl %[R_I],22f\n\t" \
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/* Post-processing. */ \
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" lghi %[R_I],0\n\t" \
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" vzero %%v0\n\t" \
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"0: \n\t" \
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/* Find invalid character - value is zero. */ \
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" vl %%v16,0(%[R_I],%[R_BUF])\n\t" \
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" vceqbs %%v23,%%v0,%%v16\n\t" \
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" jle 10f\n\t" \
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"1: \n\t" \
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/* Enlarge to UCS4. */ \
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" vuplhb %%v17,%%v16\n\t" \
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" vupllb %%v18,%%v16\n\t" \
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" vuplhh %%v19,%%v17\n\t" \
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" vupllh %%v20,%%v17\n\t" \
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" vuplhh %%v21,%%v18\n\t" \
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" vupllh %%v22,%%v18\n\t" \
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/* Store 64bytes to buf_out. */ \
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" vstm %%v19,%%v22,0(%[R_OUT])\n\t" \
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" aghi %[R_I],16\n\t" \
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" la %[R_OUT],64(%[R_OUT])\n\t" \
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" brct %[R_LI],0b\n\t" \
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" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
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" j 20f\n\t" \
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"21: mvc 0(1,%[R_BUF]),0(%[R_IN])\n\t" \
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"22: tr 0(1,%[R_BUF]),0(%[R_TBL])\n\t" \
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/* Possibly invalid character found. */ \
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"10: \n\t" \
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/* Test if input was zero, too. */ \
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" vl %%v24,0(%[R_I],%[R_IN])\n\t" \
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" vceqb %%v24,%%v0,%%v24\n\t" \
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/* Zeros in buf (v23) and inptr (v24) are marked \
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with one bits. After xor, invalid characters \
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are marked as one bits. Proceed, if no \
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invalid characters are found. */ \
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" vx %%v24,%%v23,%%v24\n\t" \
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" vfenebs %%v24,%%v24,%%v0\n\t" \
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" jo 1b\n\t" \
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/* Found an invalid translation. \
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Store the preceding chars. */ \
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" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
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" vlgvb %[R_I],%%v24,7\n\t" \
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" la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
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" sll %[R_I],2\n\t" \
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" ahi %[R_I],-1\n\t" \
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" jl 20f\n\t" \
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" lgr %[R_LI],%[R_I]\n\t" \
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" vuplhb %%v17,%%v16\n\t" \
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" vuplhh %%v19,%%v17\n\t" \
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" vstl %%v19,%[R_I],0(%[R_OUT])\n\t" \
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" ahi %[R_I],-16\n\t" \
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" jl 11f\n\t" \
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" vupllh %%v20,%%v17\n\t" \
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" vstl %%v20,%[R_I],16(%[R_OUT])\n\t" \
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" ahi %[R_I],-16\n\t" \
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" jl 11f\n\t" \
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" vupllb %%v18,%%v16\n\t" \
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" vuplhh %%v21,%%v18\n\t" \
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" vstl %%v21,%[R_I],32(%[R_OUT])\n\t" \
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" ahi %[R_I],-16\n\t" \
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" jl 11f\n\t" \
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" vupllh %%v22,%%v18\n\t" \
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" vstl %%v22,%[R_I],48(%[R_OUT])\n\t" \
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"11: \n\t" \
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" la %[R_OUT],1(%[R_LI],%[R_OUT])\n\t" \
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"20: \n\t" \
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".machine pop" \
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: /* outputs */ [R_IN] "+a" (inptr) \
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, [R_OUT] "+a" (outptr), [R_I] "=&a" (index) \
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, [R_LI] "+a" (loop_count) \
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: /* inputs */ [R_BUF] "a" (buf) \
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, [R_TBL] "a" (to_ucs1) \
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: /* clobber list*/ "memory", "cc" \
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ASM_CLOBBER_VR ("v0") ASM_CLOBBER_VR ("v16") \
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ASM_CLOBBER_VR ("v17") ASM_CLOBBER_VR ("v18") \
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ASM_CLOBBER_VR ("v19") ASM_CLOBBER_VR ("v20") \
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ASM_CLOBBER_VR ("v21") ASM_CLOBBER_VR ("v22") \
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ASM_CLOBBER_VR ("v23") ASM_CLOBBER_VR ("v24") \
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); \
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/* Error occurred? */ \
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if (loop_count != 0) \
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{ \
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/* Found an invalid character! */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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} \
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} \
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}
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# define LOOP_NEED_FLAGS
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# include <iconv/loop.c>
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/* Next, define the other direction - from UCS4 to 8bit charset. */
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# define MIN_NEEDED_INPUT MIN_NEEDED_TO
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# define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
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# define LOOPFCT TO_LOOP
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# define BODY_TO_ORIG \
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{ \
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uint32_t ch = get32 (inptr); \
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\
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if (__builtin_expect (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]), 0)\
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|| (__builtin_expect (from_ucs4[ch], '\1') == '\0' && ch != 0)) \
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{ \
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UNICODE_TAG_HANDLER (ch, 4); \
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\
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/* This is an illegal character. */ \
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STANDARD_TO_LOOP_ERR_HANDLER (4); \
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} \
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\
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*outptr++ = from_ucs4[ch]; \
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inptr += 4; \
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}
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# define BODY \
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{ \
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if (__builtin_expect (inend - inptr < 64, 1) \
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|| outend - outptr < 16) \
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/* Convert remaining bytes with c code. */ \
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BODY_TO_ORIG \
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else \
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{ \
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/* Convert 64 ... 1024 bytes at once with tr-instruction. */ \
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size_t index, tmp; \
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char buf[256]; \
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size_t loop_count = (inend - inptr) / 64; \
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uint32_t max = sizeof (from_ucs4) / sizeof (from_ucs4[0]); \
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if (loop_count > (outend - outptr) / 16) \
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loop_count = (outend - outptr) / 16; \
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if (loop_count > 16) \
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loop_count = 16; \
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size_t remaining_loop_count = loop_count; \
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/* Step 1: Check for ch>=max, ch == 0 and shorten to bytes. \
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(ch == 0 is no error, but is handled differently) */ \
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__asm__ volatile (".machine push\n\t" \
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".machine \"z13\"\n\t" \
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".machinemode \"zarch_nohighgprs\"\n\t" \
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/* Setup to check for ch >= max. */ \
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" vzero %%v21\n\t" \
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" vleih %%v21,-24576,0\n\t" /* element 0: > */ \
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" vleih %%v21,-8192,2\n\t" /* element 1: =<> */ \
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" vlvgf %%v20,%[R_MAX],0\n\t" /* element 0: val */ \
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/* Process in 64byte - 16 characters blocks. */ \
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" lghi %[R_I],0\n\t" \
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" lghi %[R_TMP],0\n\t" \
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"0: \n\t" \
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" vlm %%v16,%%v19,0(%[R_IN])\n\t" \
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/* Test for ch >= max and ch == 0. */ \
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" vstrczfs %%v22,%%v16,%%v20,%%v21\n\t" \
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" jno 10f\n\t" \
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" vstrczfs %%v22,%%v17,%%v20,%%v21\n\t" \
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" jno 11f\n\t" \
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" vstrczfs %%v22,%%v18,%%v20,%%v21\n\t" \
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" jno 12f\n\t" \
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" vstrczfs %%v22,%%v19,%%v20,%%v21\n\t" \
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" jno 13f\n\t" \
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/* Shorten to byte values. */ \
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" vpkf %%v16,%%v16,%%v17\n\t" \
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" vpkf %%v18,%%v18,%%v19\n\t" \
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" vpkh %%v16,%%v16,%%v18\n\t" \
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/* Store 16bytes to buf. */ \
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" vst %%v16,0(%[R_I],%[R_BUF])\n\t" \
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/* Loop until all blocks are processed. */ \
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" la %[R_IN],64(%[R_IN])\n\t" \
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" aghi %[R_I],16\n\t" \
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" brct %[R_LI],0b\n\t" \
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" j 20f\n\t" \
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/* Found error ch >= max or ch == 0. */ \
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"13: aghi %[R_TMP],4\n\t" \
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"12: aghi %[R_TMP],4\n\t" \
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"11: aghi %[R_TMP],4\n\t" \
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"10: vlgvb %[R_I],%%v22,7\n\t" \
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" srlg %[R_I],%[R_I],2\n\t" \
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" agr %[R_I],%[R_TMP]\n\t" \
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"20: \n\t" \
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".machine pop" \
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: /* outputs */ [R_IN] "+a" (inptr) \
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, [R_I] "=&a" (index) \
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, [R_TMP] "=d" (tmp) \
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, [R_LI] "+d" (remaining_loop_count) \
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: /* inputs */ [R_BUF] "a" (buf) \
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, [R_MAX] "d" (max) \
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: /* clobber list*/ "memory", "cc" \
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ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17") \
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ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19") \
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ASM_CLOBBER_VR ("v20") ASM_CLOBBER_VR ("v21") \
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ASM_CLOBBER_VR ("v22") \
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); \
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/* Error occurred in step 1? An error (ch >= max || ch == 0) \
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occurred, if remaining_loop_count > 0. The error occurred \
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at character-index (index) after already processed blocks. */ \
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loop_count -= remaining_loop_count; \
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if (loop_count > 0) \
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{ \
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/* Step 2: Translate already processed blocks in buf and \
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check for errors (from_ucs4[ch] == 0). */ \
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__asm__ volatile (".machine push\n\t" \
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".machine \"z13\"\n\t" \
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".machinemode \"zarch_nohighgprs\"\n\t" \
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" sllk %[R_I],%[R_LI],4\n\t" \
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" ahi %[R_I],-1\n\t" \
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/* Execute tr with correct len. */ \
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" exrl %[R_I],21f\n\t" \
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/* Post-processing. */ \
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" lghi %[R_I],0\n\t" \
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"0: \n\t" \
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/* Find invalid character - value == 0. */ \
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" vl %%v16,0(%[R_I],%[R_BUF])\n\t" \
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" vfenezbs %%v17,%%v16,%%v16\n\t" \
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" je 10f\n\t" \
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/* Store 16bytes to buf_out. */ \
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" vst %%v16,0(%[R_I],%[R_OUT])\n\t" \
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" aghi %[R_I],16\n\t" \
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" brct %[R_LI],0b\n\t" \
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" la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
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" j 20f\n\t" \
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"21: tr 0(1,%[R_BUF]),0(%[R_TBL])\n\t" \
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/* Found an error: from_ucs4[ch] == 0. */ \
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"10: la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
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" vlgvb %[R_I],%%v17,7\n\t" \
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"20: \n\t" \
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".machine pop" \
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: /* outputs */ [R_OUT] "+a" (outptr) \
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, [R_I] "=&a" (tmp) \
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, [R_LI] "+d" (loop_count) \
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: /* inputs */ [R_BUF] "a" (buf) \
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, [R_TBL] "a" (from_ucs4) \
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: /* clobber list*/ "memory", "cc" \
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ASM_CLOBBER_VR ("v16") \
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ASM_CLOBBER_VR ("v17") \
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); \
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/* Error occurred in processed bytes of step 2? \
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Thus possible error in step 1 is obsolete.*/ \
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if (tmp < 16) \
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{ \
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index = tmp; \
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inptr -= loop_count * 64; \
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} \
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} \
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/* Error occurred in step 1/2? */ \
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if (index < 16) \
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{ \
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/* Found an invalid character (see step 2) or zero \
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(see step 1) at index! Convert the chars before index \
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manually. If there is a zero at index detected by step 1, \
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there could be invalid characters before this zero. */ \
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int i; \
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uint32_t ch; \
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for (i = 0; i < index; i++) \
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{ \
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ch = get32 (inptr); \
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if (__builtin_expect (from_ucs4[ch], '\1') == '\0') \
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break; \
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*outptr++ = from_ucs4[ch]; \
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inptr += 4; \
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} \
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if (i == index) \
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{ \
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ch = get32 (inptr); \
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if (ch == 0) \
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{ \
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/* This is no error, but handled differently. */ \
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*outptr++ = from_ucs4[ch]; \
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inptr += 4; \
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continue; \
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} \
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} \
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\
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/* iconv/loop.c disables -Wmaybe-uninitialized for a false \
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positive warning in this code with -Os and has a \
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comment referencing this code accordingly. Updates in \
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one place may require updates in the other. */ \
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UNICODE_TAG_HANDLER (ch, 4); \
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\
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/* This is an illegal character. */ \
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STANDARD_TO_LOOP_ERR_HANDLER (4); \
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} \
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} \
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}
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# define LOOP_NEED_FLAGS
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# include <iconv/loop.c>
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/* Generate ifunc'ed loop function. */
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s390_libc_ifunc_expr (__from_generic_c, __from_generic,
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(sizeof (from_ucs4) / sizeof (from_ucs4[0]) <= 256
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&& hwcap & HWCAP_S390_VX)
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? __from_generic_vx
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: __from_generic_c);
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s390_libc_ifunc_expr (__to_generic_c, __to_generic,
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(sizeof (from_ucs4) / sizeof (from_ucs4[0]) <= 256
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&& hwcap & HWCAP_S390_VX)
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? __to_generic_vx
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: __to_generic_c);
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strong_alias (__to_generic_c_single, __to_generic_single)
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# undef FROM_LOOP
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# undef TO_LOOP
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# define FROM_LOOP __from_generic
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# define TO_LOOP __to_generic
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# include <iconv/skeleton.c>
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#else
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/* Generate this module without ifunc if build environment lacks vector
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support. Instead the common 8bit-generic.c is used. */
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# include "iconvdata/8bit-generic.c"
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#endif /* !defined HAVE_S390_VX_ASM_SUPPORT */
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