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From 1ae5597025b342ee8fec59e04970b44fc1361744 Mon Sep 17 00:00:00 2001
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From: Stefan Liebler <stli@linux.vnet.ibm.com>
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Date: Mon, 7 Nov 2016 17:17:51 +0100
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Subject: [PATCH 14/17] S390: Fix utf32 to utf8 handling of low surrogates
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(disable cu41).
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Upstream commit 52f8a48e24563daa807f94824ce9782b9a9eece9
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According to the latest Unicode standard, a conversion from/to UTF-xx has
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to report an error if the character value is in range of an utf16 surrogate
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(0xd800..0xdfff). See https://sourceware.org/ml/libc-help/2015-12/msg00015.html.
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Thus the cu41 instruction, which converts from utf32 to utf8, has to be
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disabled because it does not report an error in case of a value in range of
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a low surrogate (0xdc00..0xdfff). The etf3eh variant is removed and the c,
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vector variant is adjusted to handle the value in range of an utf16 low
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surrogate correctly.
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ChangeLog:
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* sysdeps/s390/utf8-utf32-z9.c: Disable cu41 instruction and report
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an error in case of a value in range of an utf16 low surrogate.
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---
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sysdeps/s390/utf8-utf32-z9.c | 188 ++++++++++++++++++++++++++-----------------
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1 file changed, 115 insertions(+), 73 deletions(-)
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diff --git a/sysdeps/s390/utf8-utf32-z9.c b/sysdeps/s390/utf8-utf32-z9.c
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index e39e0a7..efae745 100644
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--- a/sysdeps/s390/utf8-utf32-z9.c
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+++ b/sysdeps/s390/utf8-utf32-z9.c
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@@ -572,28 +572,6 @@ __from_utf8_loop_resolver (unsigned long int dl_hwcap)
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strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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-
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-/* Conversion from UTF-32 internal/BE to UTF-8. */
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-#define BODY_TO_HW(ASM) \
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- { \
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- ASM; \
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- if (__glibc_likely (inptr == inend) \
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- || result == __GCONV_FULL_OUTPUT) \
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- break; \
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- if (inptr + 4 > inend) \
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- { \
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- result = __GCONV_INCOMPLETE_INPUT; \
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- break; \
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- } \
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- STANDARD_TO_LOOP_ERR_HANDLER (4); \
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- }
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-
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-/* The hardware routine uses the S/390 cu41 instruction. */
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-#define BODY_TO_ETF3EH BODY_TO_HW (HARDWARE_CONVERT ("cu41 %0, %1"))
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-
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-/* The hardware routine uses the S/390 vector and cu41 instructions. */
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-#define BODY_TO_VX BODY_TO_HW (HW_TO_VX)
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-
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/* The software routine mimics the S/390 cu41 instruction. */
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#define BODY_TO_C \
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{ \
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@@ -632,7 +610,7 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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- if (wc >= 0xd800 && wc < 0xdc00) \
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+ if (wc >= 0xd800 && wc <= 0xdfff) \
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{ \
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/* Do not accept UTF-16 surrogates. */ \
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result = __GCONV_ILLEGAL_INPUT; \
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@@ -679,13 +657,12 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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inptr += 4; \
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}
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-#define HW_TO_VX \
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+/* The hardware routine uses the S/390 vector instructions. */
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+#define BODY_TO_VX \
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{ \
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- register const unsigned char* pInput asm ("8") = inptr; \
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- register size_t inlen asm ("9") = inend - inptr; \
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- register unsigned char* pOutput asm ("10") = outptr; \
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- register size_t outlen asm("11") = outend - outptr; \
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- unsigned long tmp, tmp2; \
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+ size_t inlen = inend - inptr; \
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+ size_t outlen = outend - outptr; \
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+ unsigned long tmp, tmp2, tmp3; \
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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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@@ -696,10 +673,10 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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CONVERT_32BIT_SIZE_T ([R_INLEN]) \
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CONVERT_32BIT_SIZE_T ([R_OUTLEN]) \
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/* Loop which handles UTF-32 chars <=0x7f. */ \
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- "0: clgijl %[R_INLEN],64,20f\n\t" \
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- " clgijl %[R_OUTLEN],16,20f\n\t" \
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+ "0: clgijl %[R_INLEN],64,2f\n\t" \
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+ " clgijl %[R_OUTLEN],16,2f\n\t" \
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"1: vlm %%v16,%%v19,0(%[R_IN])\n\t" \
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- " lghi %[R_TMP],0\n\t" \
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+ " lghi %[R_TMP2],0\n\t" \
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/* Shorten to byte values. */ \
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" vpkf %%v23,%%v16,%%v17\n\t" \
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" vpkf %%v24,%%v18,%%v19\n\t" \
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@@ -719,41 +696,116 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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" aghi %[R_OUTLEN],-16\n\t" \
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" la %[R_IN],64(%[R_IN])\n\t" \
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" la %[R_OUT],16(%[R_OUT])\n\t" \
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- " clgijl %[R_INLEN],64,20f\n\t" \
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- " clgijl %[R_OUTLEN],16,20f\n\t" \
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+ " clgijl %[R_INLEN],64,2f\n\t" \
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+ " clgijl %[R_OUTLEN],16,2f\n\t" \
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" j 1b\n\t" \
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/* Found a value > 0x7f. */ \
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- "13: ahi %[R_TMP],4\n\t" \
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- "12: ahi %[R_TMP],4\n\t" \
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- "11: ahi %[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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- " je 20f\n\t" \
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+ "13: ahi %[R_TMP2],4\n\t" \
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+ "12: ahi %[R_TMP2],4\n\t" \
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+ "11: ahi %[R_TMP2],4\n\t" \
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+ "10: vlgvb %[R_TMP],%%v22,7\n\t" \
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+ " srlg %[R_TMP],%[R_TMP],2\n\t" \
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+ " agr %[R_TMP],%[R_TMP2]\n\t" \
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+ " je 16f\n\t" \
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/* Store characters before invalid one... */ \
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- " slgr %[R_OUTLEN],%[R_I]\n\t" \
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- "15: aghi %[R_I],-1\n\t" \
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- " vstl %%v23,%[R_I],0(%[R_OUT])\n\t" \
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+ " slgr %[R_OUTLEN],%[R_TMP]\n\t" \
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+ "15: aghi %[R_TMP],-1\n\t" \
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+ " vstl %%v23,%[R_TMP],0(%[R_OUT])\n\t" \
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/* ... and update pointers. */ \
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- " aghi %[R_I],1\n\t" \
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- " la %[R_OUT],0(%[R_I],%[R_OUT])\n\t" \
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- " sllg %[R_I],%[R_I],2\n\t" \
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- " la %[R_IN],0(%[R_I],%[R_IN])\n\t" \
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- " slgr %[R_INLEN],%[R_I]\n\t" \
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- /* Handle multibyte utf8-char with convert instruction. */ \
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- "20: cu41 %[R_OUT],%[R_IN]\n\t" \
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- " jo 0b\n\t" /* Try vector implemenation again. */ \
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- " lochil %[R_RES],%[RES_OUT_FULL]\n\t" /* cc == 1. */ \
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- " lochih %[R_RES],%[RES_IN_ILL]\n\t" /* cc == 2. */ \
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+ " aghi %[R_TMP],1\n\t" \
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+ " la %[R_OUT],0(%[R_TMP],%[R_OUT])\n\t" \
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+ " sllg %[R_TMP2],%[R_TMP],2\n\t" \
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+ " la %[R_IN],0(%[R_TMP2],%[R_IN])\n\t" \
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+ " slgr %[R_INLEN],%[R_TMP2]\n\t" \
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+ /* Calculate remaining uint32_t values in loaded vrs. */ \
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+ "16: lghi %[R_TMP2],16\n\t" \
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+ " sgr %[R_TMP2],%[R_TMP]\n\t" \
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+ " l %[R_TMP],0(%[R_IN])\n\t" \
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+ " aghi %[R_INLEN],-4\n\t" \
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+ " j 22f\n\t" \
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+ /* Handle remaining bytes. */ \
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+ "2: clgije %[R_INLEN],0,99f\n\t" \
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+ " clgijl %[R_INLEN],4,92f\n\t" \
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+ /* Calculate remaining uint32_t values in inptr. */ \
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+ " srlg %[R_TMP2],%[R_INLEN],2\n\t" \
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+ /* Handle multibyte utf8-char. */ \
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+ "20: l %[R_TMP],0(%[R_IN])\n\t" \
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+ " aghi %[R_INLEN],-4\n\t" \
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+ /* Test if ch is 1byte UTF-8 char. */ \
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+ "21: clijh %[R_TMP],0x7f,22f\n\t" \
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+ /* Handle 1-byte UTF-8 char. */ \
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+ "31: slgfi %[R_OUTLEN],1\n\t" \
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+ " jl 90f \n\t" \
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+ " stc %[R_TMP],0(%[R_OUT])\n\t" \
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+ " la %[R_IN],4(%[R_IN])\n\t" \
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+ " la %[R_OUT],1(%[R_OUT])\n\t" \
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+ " brctg %[R_TMP2],20b\n\t" \
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+ " j 0b\n\t" /* Switch to vx-loop. */ \
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+ /* Test if ch is 2byte UTF-8 char. */ \
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+ "22: clfi %[R_TMP],0x7ff\n\t" \
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+ " jh 23f\n\t" \
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+ /* Handle 2-byte UTF-8 char. */ \
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+ "32: slgfi %[R_OUTLEN],2\n\t" \
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+ " jl 90f \n\t" \
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+ " llill %[R_TMP3],0xc080\n\t" \
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+ " risbgn %[R_TMP3],%[R_TMP],51,55,2\n\t" /* 1. byte. */ \
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+ " risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 2. byte. */ \
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+ " sth %[R_TMP3],0(%[R_OUT])\n\t" \
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+ " la %[R_IN],4(%[R_IN])\n\t" \
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+ " la %[R_OUT],2(%[R_OUT])\n\t" \
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+ " brctg %[R_TMP2],20b\n\t" \
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+ " j 0b\n\t" /* Switch to vx-loop. */ \
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+ /* Test if ch is 3-byte UTF-8 char. */ \
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+ "23: clfi %[R_TMP],0xffff\n\t" \
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+ " jh 24f\n\t" \
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+ /* Handle 3-byte UTF-8 char. */ \
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+ "33: slgfi %[R_OUTLEN],3\n\t" \
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ce426f |
+ " jl 90f \n\t" \
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+ " llilf %[R_TMP3],0xe08080\n\t" \
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ce426f |
+ " risbgn %[R_TMP3],%[R_TMP],44,47,4\n\t" /* 1. byte. */ \
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+ " risbgn %[R_TMP3],%[R_TMP],50,55,2\n\t" /* 2. byte. */ \
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+ " risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 3. byte. */ \
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ce426f |
+ /* Test if ch is a UTF-16 surrogate: ch & 0xf800 == 0xd800 */ \
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ce426f |
+ " nilf %[R_TMP],0xf800\n\t" \
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ce426f |
+ " clfi %[R_TMP],0xd800\n\t" \
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ce426f |
+ " je 91f\n\t" /* Do not accept UTF-16 surrogates. */ \
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ce426f |
+ " stcm %[R_TMP3],7,0(%[R_OUT])\n\t" \
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ce426f |
+ " la %[R_IN],4(%[R_IN])\n\t" \
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ce426f |
+ " la %[R_OUT],3(%[R_OUT])\n\t" \
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ce426f |
+ " brctg %[R_TMP2],20b\n\t" \
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ce426f |
+ " j 0b\n\t" /* Switch to vx-loop. */ \
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ce426f |
+ /* Test if ch is 4-byte UTF-8 char. */ \
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ce426f |
+ "24: clfi %[R_TMP],0x10ffff\n\t" \
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ce426f |
+ " jh 91f\n\t" /* ch > 0x10ffff is not allowed! */ \
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ce426f |
+ /* Handle 4-byte UTF-8 char. */ \
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ce426f |
+ "34: slgfi %[R_OUTLEN],4\n\t" \
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ce426f |
+ " jl 90f \n\t" \
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ce426f |
+ " llilf %[R_TMP3],0xf0808080\n\t" \
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ce426f |
+ " risbgn %[R_TMP3],%[R_TMP],37,39,6\n\t" /* 1. byte. */ \
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ce426f |
+ " risbgn %[R_TMP3],%[R_TMP],42,47,4\n\t" /* 2. byte. */ \
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ce426f |
+ " risbgn %[R_TMP3],%[R_TMP],50,55,2\n\t" /* 3. byte. */ \
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ce426f |
+ " risbgn %[R_TMP3],%[R_TMP],58,63,0\n\t" /* 4. byte. */ \
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ce426f |
+ " st %[R_TMP3],0(%[R_OUT])\n\t" \
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ce426f |
+ " la %[R_IN],4(%[R_IN])\n\t" \
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ce426f |
+ " la %[R_OUT],4(%[R_OUT])\n\t" \
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ce426f |
+ " brctg %[R_TMP2],20b\n\t" \
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ce426f |
+ " j 0b\n\t" /* Switch to vx-loop. */ \
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ce426f |
+ "92: lghi %[R_RES],%[RES_IN_FULL]\n\t" \
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ce426f |
+ " j 99f\n\t" \
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ce426f |
+ "91: lghi %[R_RES],%[RES_IN_ILL]\n\t" \
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ce426f |
+ " j 99f\n\t" \
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ce426f |
+ "90: lghi %[R_RES],%[RES_OUT_FULL]\n\t" \
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ce426f |
+ "99: \n\t" \
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ce426f |
".machine pop" \
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ce426f |
- : /* outputs */ [R_IN] "+a" (pInput) \
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ce426f |
- , [R_INLEN] "+d" (inlen), [R_OUT] "+a" (pOutput) \
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ce426f |
- , [R_OUTLEN] "+d" (outlen), [R_TMP] "=d" (tmp) \
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ce426f |
- , [R_I] "=a" (tmp2) \
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ce426f |
+ : /* outputs */ [R_IN] "+a" (inptr) \
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ce426f |
+ , [R_INLEN] "+d" (inlen), [R_OUT] "+a" (outptr) \
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ce426f |
+ , [R_OUTLEN] "+d" (outlen), [R_TMP] "=a" (tmp) \
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ce426f |
+ , [R_TMP2] "=a" (tmp2), [R_TMP3] "=d" (tmp3) \
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ce426f |
, [R_RES] "+d" (result) \
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ce426f |
: /* inputs */ \
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ce426f |
[RES_OUT_FULL] "i" (__GCONV_FULL_OUTPUT) \
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ce426f |
, [RES_IN_ILL] "i" (__GCONV_ILLEGAL_INPUT) \
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ce426f |
+ , [RES_IN_FULL] "i" (__GCONV_INCOMPLETE_INPUT) \
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ce426f |
: /* clobber list */ "memory", "cc" \
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ce426f |
ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17") \
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ce426f |
ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19") \
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ce426f |
@@ -761,8 +813,11 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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ce426f |
ASM_CLOBBER_VR ("v22") ASM_CLOBBER_VR ("v23") \
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ce426f |
ASM_CLOBBER_VR ("v24") \
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ce426f |
); \
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ce426f |
- inptr = pInput; \
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ce426f |
- outptr = pOutput; \
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ce426f |
+ if (__glibc_likely (inptr == inend) \
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ce426f |
+ || result != __GCONV_ILLEGAL_INPUT) \
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ce426f |
+ break; \
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ce426f |
+ \
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ce426f |
+ STANDARD_TO_LOOP_ERR_HANDLER (4); \
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ce426f |
}
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ce426f |
|
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ce426f |
/* Generate loop-function with software routing. */
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ce426f |
@@ -774,15 +829,6 @@ strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
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ce426f |
#define LOOP_NEED_FLAGS
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ce426f |
#include <iconv/loop.c>
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ce426f |
|
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ce426f |
-/* Generate loop-function with hardware utf-convert instruction. */
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ce426f |
-#define MIN_NEEDED_INPUT MIN_NEEDED_TO
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ce426f |
-#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
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|
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ce426f |
-#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
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ce426f |
-#define LOOPFCT __to_utf8_loop_etf3eh
|
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ce426f |
-#define LOOP_NEED_FLAGS
|
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ce426f |
-#define BODY BODY_TO_ETF3EH
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|
|
ce426f |
-#include <iconv/loop.c>
|
|
|
ce426f |
-
|
|
|
ce426f |
#if defined HAVE_S390_VX_ASM_SUPPORT
|
|
|
ce426f |
/* Generate loop-function with hardware vector and utf-convert instructions. */
|
|
|
ce426f |
# define MIN_NEEDED_INPUT MIN_NEEDED_TO
|
|
|
ce426f |
@@ -807,10 +853,6 @@ __to_utf8_loop_resolver (unsigned long int dl_hwcap)
|
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|
ce426f |
return __to_utf8_loop_vx;
|
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|
ce426f |
else
|
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|
ce426f |
#endif
|
|
|
ce426f |
- if (dl_hwcap & HWCAP_S390_ZARCH && dl_hwcap & HWCAP_S390_HIGH_GPRS
|
|
|
ce426f |
- && dl_hwcap & HWCAP_S390_ETF3EH)
|
|
|
ce426f |
- return __to_utf8_loop_etf3eh;
|
|
|
ce426f |
- else
|
|
|
ce426f |
return __to_utf8_loop_c;
|
|
|
ce426f |
}
|
|
|
ce426f |
|
|
|
ce426f |
--
|
|
|
ce426f |
1.8.3.1
|
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|
ce426f |
|