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base/SOURCES/glibc-rh1380680-11.patch

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From ec79c95f95869a30d3f13c6229ebef1ad4931281 Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.vnet.ibm.com>
Date: Mon, 7 Nov 2016 16:20:45 +0100
Subject: [PATCH 11/17] S390: Optimize utf8-utf16 module.
Upstream commit 5bd11b19099b3f22d821515f9c93f1ecc1a7e15e
This patch reworks the s390 specific module to convert between utf8 and utf16.
Now ifunc is used to choose either the c or etf3eh (with convert utf instruction)
variants at runtime. Furthermore a new vector variant for z13 is introduced
which will be build and chosen if vector support is available at build / runtime.
In case of converting utf 8 to utf16, the vector variant optimizes input of
1byte utf8 characters. The convert utf instruction is used if a multibyte utf8
character is found.
For the other direction utf16 to utf8, the cu21 instruction can't be re-enabled,
because it does not report an error, if the input-stream consists of a single
low surrogate utf16 char (e.g. 0xdc00). This applies to the newest z13, too.
Thus there is only the c or the new vector variant, which can handle 1..4 byte
utf8 characters.
The c variant from utf16 to utf8 has beed fixed. If a high surrogate was at the
end of the input-buffer, then errno was set to EINVAL and the input-pointer
pointed just after the high surrogate. Now it points to the beginning of the
high surrogate.
This patch also fixes some whitespace errors. The c variant from utf8 to utf16
is now checking that tail-bytes starts with 0b10... and the value is not in
range of an utf16 surrogate.
Furthermore, the etf3eh variants are handling the "UTF-xx//IGNORE" case now.
Before they ignored the ignore-case and always stopped at an error.
ChangeLog:
* sysdeps/s390/s390-64/utf8-utf16-z9.c: Use ifunc to select c,
etf3eh or new vector loop-variant.
---
sysdeps/s390/s390-64/utf8-utf16-z9.c | 547 ++++++++++++++++++++++++++++-------
1 file changed, 441 insertions(+), 106 deletions(-)
diff --git a/sysdeps/s390/s390-64/utf8-utf16-z9.c b/sysdeps/s390/s390-64/utf8-utf16-z9.c
index 590a149..b36ee9e 100644
--- a/sysdeps/s390/s390-64/utf8-utf16-z9.c
+++ b/sysdeps/s390/s390-64/utf8-utf16-z9.c
@@ -30,33 +30,27 @@
#include <dl-procinfo.h>
#include <gconv.h>
-/* UTF-16 big endian byte order mark. */
-#define BOM_UTF16 0xfeff
+#if defined HAVE_S390_VX_GCC_SUPPORT
+# define ASM_CLOBBER_VR(NR) , NR
+#else
+# define ASM_CLOBBER_VR(NR)
+#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_utf8_loop
-#define TO_LOOP to_utf8_loop
+#define FROM_LOOP __from_utf8_loop
+#define TO_LOOP __to_utf8_loop
#define FROM_DIRECTION (dir == from_utf8)
#define ONE_DIRECTION 0
-#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; \
- }
+
+
+/* UTF-16 big endian byte order mark. */
+#define BOM_UTF16 0xfeff
/* Direction of the transformation. */
enum direction
@@ -151,16 +145,16 @@ gconv_end (struct __gconv_step *data)
register unsigned long long outlen __asm__("11") = outend - outptr; \
uint64_t cc = 0; \
\
- __asm__ volatile (".machine push \n\t" \
- ".machine \"z9-109\" \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"); \
+ __asm__ __volatile__ (".machine push \n\t" \
+ ".machine \"z9-109\" \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; \
@@ -169,50 +163,135 @@ gconv_end (struct __gconv_step *data)
if (cc == 1) \
{ \
result = __GCONV_FULL_OUTPUT; \
- break; \
} \
else if (cc == 2) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
- break; \
} \
}
+#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); \
+ }
+
+#define BODY_FROM_ETF3EH BODY_FROM_HW (HARDWARE_CONVERT ("cu12 %0, %1, 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" \
+ /* 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)
+
-#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 LOOPFCT FROM_LOOP
/* The software implementation is based on the code in gconv_simple.c. */
-#define BODY \
+#define BODY_FROM_C \
{ \
- if (GLRO (dl_hwcap) & HWCAP_S390_ETF3EH) \
- { \
- HARDWARE_CONVERT ("cu12 %0, %1, 1"); \
- \
- if (inptr != inend) \
- { \
- int i; \
- for (i = 1; inptr + i < inend; ++i) \
- if ((inptr[i] & 0xc0) != 0x80) \
- break; \
- \
- if (__glibc_likely (inptr + i == inend)) \
- { \
- result = __GCONV_INCOMPLETE_INPUT; \
- break; \
- } \
- STANDARD_FROM_LOOP_ERR_HANDLER (i); \
- } \
- continue; \
- } \
- \
/* Next input byte. */ \
uint16_t ch = *inptr; \
\
- if (__glibc_likely (ch < 0x80)) \
+ if (__glibc_likely (ch < 0x80)) \
{ \
/* One byte sequence. */ \
++inptr; \
@@ -230,13 +309,13 @@ gconv_end (struct __gconv_step *data)
cnt = 2; \
ch &= 0x1f; \
} \
- else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \
+ else if (__glibc_likely ((ch & 0xf0) == 0xe0)) \
{ \
/* We expect three bytes. */ \
cnt = 3; \
ch &= 0x0f; \
} \
- else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \
+ else if (__glibc_likely ((ch & 0xf8) == 0xf0)) \
{ \
/* We expect four bytes. */ \
cnt = 4; \
@@ -257,7 +336,7 @@ gconv_end (struct __gconv_step *data)
STANDARD_FROM_LOOP_ERR_HANDLER (i); \
} \
\
- if (__glibc_unlikely (inptr + cnt > inend)) \
+ if (__glibc_unlikely (inptr + cnt > inend)) \
{ \
/* We don't have enough input. But before we report \
that check that all the bytes are correct. */ \
@@ -265,7 +344,7 @@ gconv_end (struct __gconv_step *data)
if ((inptr[i] & 0xc0) != 0x80) \
break; \
\
- if (__glibc_likely (inptr + i == inend)) \
+ if (__glibc_likely (inptr + i == inend)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
@@ -280,23 +359,31 @@ gconv_end (struct __gconv_step *data)
low) are needed. */ \
uint16_t zabcd, high, low; \
\
- if (__glibc_unlikely (outptr + 4 > outend)) \
+ 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; \
+ ((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 |= zabcd << 6; /* abcd bits */ \
high |= (inptr[1] & 0xf) << 2; /* efgh bits */ \
high |= (inptr[2] & 0x30) >> 4; /* ij bits */ \
\
@@ -326,8 +413,19 @@ gconv_end (struct __gconv_step *data)
ch <<= 6; \
ch |= byte & 0x3f; \
} \
- inptr += cnt; \
\
+ /* 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. */ \
@@ -335,43 +433,70 @@ gconv_end (struct __gconv_step *data)
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 LOOPFCT __from_utf8_loop_c
+#define LOOP_NEED_FLAGS
+#define BODY BODY_FROM_C
+#include <iconv/loop.c>
+
+/* 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 LOOPFCT __from_utf8_loop_etf3eh
#define LOOP_NEED_FLAGS
+#define BODY BODY_FROM_ETF3EH
#include <iconv/loop.c>
+#if defined HAVE_S390_VX_ASM_SUPPORT
+/* 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 LOOPFCT __from_utf8_loop_vx
+# define LOOP_NEED_FLAGS
+# define BODY BODY_FROM_VX
+# include <iconv/loop.c>
+#endif
+
+
+/* Generate ifunc'ed loop function. */
+__typeof(__from_utf8_loop_c)
+__attribute__ ((ifunc ("__from_utf8_loop_resolver")))
+__from_utf8_loop;
+
+static void *
+__from_utf8_loop_resolver (unsigned long int dl_hwcap)
+{
+#if defined HAVE_S390_VX_ASM_SUPPORT
+ if (dl_hwcap & HWCAP_S390_VX)
+ return __from_utf8_loop_vx;
+ else
+#endif
+ if (dl_hwcap & HWCAP_S390_ETF3EH)
+ return __from_utf8_loop_etf3eh;
+ else
+ return __from_utf8_loop_c;
+}
+
+strong_alias (__from_utf8_loop_c_single, __from_utf8_loop_single)
+
/* Conversion from UTF-16 to UTF-8. */
-#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 LOOPFCT TO_LOOP
/* The software routine is based on the functionality of the S/390
hardware instruction (cu21) as described in the Principles of
Operation. */
-#define BODY \
+#define BODY_TO_C \
{ \
- /* The hardware instruction currently fails to report an error for \
- isolated low surrogates so we have to disable the instruction \
- until this gets resolved. */ \
- if (0) /* (GLRO (dl_hwcap) & HWCAP_S390_ETF3EH) */ \
- { \
- HARDWARE_CONVERT ("cu21 %0, %1, 1"); \
- if (inptr != inend) \
- { \
- /* Check if the third byte is \
- a valid start of a UTF-16 surrogate. */ \
- if (inend - inptr == 3 && (inptr[3] & 0xfc) != 0xdc) \
- STANDARD_TO_LOOP_ERR_HANDLER (3); \
- \
- result = __GCONV_INCOMPLETE_INPUT; \
- break; \
- } \
- continue; \
- } \
- \
uint16_t c = get16 (inptr); \
\
- if (__glibc_likely (c <= 0x007f)) \
+ if (__glibc_likely (c <= 0x007f)) \
{ \
/* Single byte UTF-8 char. */ \
*outptr = c & 0xff; \
@@ -379,20 +504,20 @@ gconv_end (struct __gconv_step *data)
} \
else if (c >= 0x0080 && c <= 0x07ff) \
{ \
- /* Two byte UTF-8 char. */ \
+ /* Two byte UTF-8 char. */ \
\
- if (__glibc_unlikely (outptr + 2 > outend)) \
+ if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
- outptr[0] = 0xc0; \
- outptr[0] |= c >> 6; \
+ outptr[0] = 0xc0; \
+ outptr[0] |= c >> 6; \
\
- outptr[1] = 0x80; \
- outptr[1] |= c & 0x3f; \
+ outptr[1] = 0x80; \
+ outptr[1] |= c & 0x3f; \
\
outptr += 2; \
} \
@@ -400,7 +525,7 @@ gconv_end (struct __gconv_step *data)
{ \
/* Three byte UTF-8 char. */ \
\
- if (__glibc_unlikely (outptr + 3 > outend)) \
+ if (__glibc_unlikely (outptr + 3 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
@@ -419,22 +544,22 @@ gconv_end (struct __gconv_step *data)
} \
else if (c >= 0xd800 && c <= 0xdbff) \
{ \
- /* Four byte UTF-8 char. */ \
+ /* Four byte UTF-8 char. */ \
uint16_t low, uvwxy; \
\
- if (__glibc_unlikely (outptr + 4 > outend)) \
+ if (__glibc_unlikely (outptr + 4 > outend)) \
{ \
/* Overflow in the output buffer. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
- inptr += 2; \
- if (__glibc_unlikely (inptr + 2 > inend)) \
+ if (__glibc_unlikely (inptr + 4 > inend)) \
{ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
+ inptr += 2; \
low = get16 (inptr); \
\
if ((low & 0xfc00) != 0xdc00) \
@@ -461,11 +586,221 @@ gconv_end (struct __gconv_step *data)
} \
else \
{ \
- STANDARD_TO_LOOP_ERR_HANDLER (2); \
+ STANDARD_TO_LOOP_ERR_HANDLER (2); \
} \
inptr += 2; \
}
-#define LOOP_NEED_FLAGS
-#include <iconv/loop.c>
+
+#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" \
+ /* 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 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
+#if defined HAVE_S390_VX_ASM_SUPPORT
+# define LOOPFCT __to_utf8_loop_c
+# define BODY BODY_TO_C
+# define LOOP_NEED_FLAGS
+# include <iconv/loop.c>
+
+/* 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 LOOPFCT __to_utf8_loop_vx
+# define BODY BODY_TO_VX
+# define LOOP_NEED_FLAGS
+# include <iconv/loop.c>
+
+/* Generate ifunc'ed loop function. */
+__typeof(__to_utf8_loop_c)
+__attribute__ ((ifunc ("__to_utf8_loop_resolver")))
+__to_utf8_loop;
+
+static void *
+__to_utf8_loop_resolver (unsigned long int dl_hwcap)
+{
+ if (dl_hwcap & HWCAP_S390_VX)
+ return __to_utf8_loop_vx;
+ else
+ return __to_utf8_loop_c;
+}
+
+strong_alias (__to_utf8_loop_c_single, __to_utf8_loop_single)
+
+#else
+# define LOOPFCT TO_LOOP
+# define BODY BODY_TO_C
+# define LOOP_NEED_FLAGS
+# include <iconv/loop.c>
+#endif /* !HAVE_S390_VX_ASM_SUPPORT */
#include <iconv/skeleton.c>
--
1.8.3.1