} # ac_fn_cxx_check_header_mongrel
+# ac_fn_cxx_try_run LINENO
+# ------------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_cxx_try_run ()
+{
+ as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+ if { { ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+ { { case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then :
+ ac_retval=0
+else
+ $as_echo "$as_me: program exited with status $ac_status" >&5
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ ac_retval=$ac_status
+fi
+ rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+ eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+ return $ac_retval
+
+} # ac_fn_cxx_try_run
+
# ac_fn_cxx_try_link LINENO
# -------------------------
# Try to link conftest.$ac_ext, and return whether this succeeded.
} # ac_fn_cxx_check_type
-# ac_fn_cxx_try_run LINENO
-# ------------------------
-# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
-# that executables *can* be run.
-ac_fn_cxx_try_run ()
-{
- as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
- if { { ac_try="$ac_link"
-case "(($ac_try" in
- *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
- *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
- (eval "$ac_link") 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
- { { case "(($ac_try" in
- *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
- *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
- (eval "$ac_try") 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; }; then :
- ac_retval=0
-else
- $as_echo "$as_me: program exited with status $ac_status" >&5
- $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
- ac_retval=$ac_status
-fi
- rm -rf conftest.dSYM conftest_ipa8_conftest.oo
- eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
- return $ac_retval
-
-} # ac_fn_cxx_try_run
-
# ac_fn_cxx_compute_int LINENO EXPR VAR INCLUDES
# ----------------------------------------------
# Tries to find the compile-time value of EXPR in a program that includes
fi
# Checks for typedefs, structures, and compiler characteristics.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
+$as_echo_n "checking whether byte ordering is bigendian... " >&6; }
+if test "${ac_cv_c_bigendian+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_cv_c_bigendian=unknown
+ # See if we're dealing with a universal compiler.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#ifndef __APPLE_CC__
+ not a universal capable compiler
+ #endif
+ typedef int dummy;
+
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+
+ # Check for potential -arch flags. It is not universal unless
+ # there are at least two -arch flags with different values.
+ ac_arch=
+ ac_prev=
+ for ac_word in $CC $CFLAGS $CPPFLAGS $LDFLAGS; do
+ if test -n "$ac_prev"; then
+ case $ac_word in
+ i?86 | x86_64 | ppc | ppc64)
+ if test -z "$ac_arch" || test "$ac_arch" = "$ac_word"; then
+ ac_arch=$ac_word
+ else
+ ac_cv_c_bigendian=universal
+ break
+ fi
+ ;;
+ esac
+ ac_prev=
+ elif test "x$ac_word" = "x-arch"; then
+ ac_prev=arch
+ fi
+ done
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ if test $ac_cv_c_bigendian = unknown; then
+ # See if sys/param.h defines the BYTE_ORDER macro.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+ #include <sys/param.h>
+
+int
+main ()
+{
+#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
+ && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
+ && LITTLE_ENDIAN)
+ bogus endian macros
+ #endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ # It does; now see whether it defined to BIG_ENDIAN or not.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <sys/types.h>
+ #include <sys/param.h>
+
+int
+main ()
+{
+#if BYTE_ORDER != BIG_ENDIAN
+ not big endian
+ #endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ ac_cv_c_bigendian=yes
+else
+ ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ fi
+ if test $ac_cv_c_bigendian = unknown; then
+ # See if <limits.h> defines _LITTLE_ENDIAN or _BIG_ENDIAN (e.g., Solaris).
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <limits.h>
+
+int
+main ()
+{
+#if ! (defined _LITTLE_ENDIAN || defined _BIG_ENDIAN)
+ bogus endian macros
+ #endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ # It does; now see whether it defined to _BIG_ENDIAN or not.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <limits.h>
+
+int
+main ()
+{
+#ifndef _BIG_ENDIAN
+ not big endian
+ #endif
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ ac_cv_c_bigendian=yes
+else
+ ac_cv_c_bigendian=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ fi
+ if test $ac_cv_c_bigendian = unknown; then
+ # Compile a test program.
+ if test "$cross_compiling" = yes; then :
+ # Try to guess by grepping values from an object file.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+short int ascii_mm[] =
+ { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+ short int ascii_ii[] =
+ { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+ int use_ascii (int i) {
+ return ascii_mm[i] + ascii_ii[i];
+ }
+ short int ebcdic_ii[] =
+ { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+ short int ebcdic_mm[] =
+ { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+ int use_ebcdic (int i) {
+ return ebcdic_mm[i] + ebcdic_ii[i];
+ }
+ extern int foo;
+
+int
+main ()
+{
+return use_ascii (foo) == use_ebcdic (foo);
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+ ac_cv_c_bigendian=yes
+ fi
+ if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+ if test "$ac_cv_c_bigendian" = unknown; then
+ ac_cv_c_bigendian=no
+ else
+ # finding both strings is unlikely to happen, but who knows?
+ ac_cv_c_bigendian=unknown
+ fi
+ fi
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$ac_includes_default
+int
+main ()
+{
+
+ /* Are we little or big endian? From Harbison&Steele. */
+ union
+ {
+ long int l;
+ char c[sizeof (long int)];
+ } u;
+ u.l = 1;
+ return u.c[sizeof (long int) - 1] == 1;
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_run "$LINENO"; then :
+ ac_cv_c_bigendian=no
+else
+ ac_cv_c_bigendian=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_bigendian" >&5
+$as_echo "$ac_cv_c_bigendian" >&6; }
+ case $ac_cv_c_bigendian in #(
+ yes)
+ $as_echo "#define WORDS_BIGENDIAN 1" >>confdefs.h
+;; #(
+ no)
+ ;; #(
+ universal)
+
+$as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
+
+ ;; #(
+ *)
+ as_fn_error "unknown endianness
+ presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
+ esac
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
$as_echo_n "checking for an ANSI C-conforming const... " >&6; }
if test "${ac_cv_c_const+set}" = set; then :
fi
+
+ ac_fn_cxx_check_type "$LINENO" "uintptr_t" "ac_cv_type_uintptr_t" "$ac_includes_default"
+if test "x$ac_cv_type_uintptr_t" = x""yes; then :
+
+$as_echo "#define HAVE_UINTPTR_T 1" >>confdefs.h
+
+else
+ for ac_type in 'unsigned int' 'unsigned long int' \
+ 'unsigned long long int'; do
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+$ac_includes_default
+int
+main ()
+{
+static int test_array [1 - 2 * !(sizeof (void *) <= sizeof ($ac_type))];
+test_array [0] = 0
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+
+cat >>confdefs.h <<_ACEOF
+#define uintptr_t $ac_type
+_ACEOF
+
+ ac_type=
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ test -z "$ac_type" && break
+ done
+fi
+
+
+ac_fn_cxx_check_type "$LINENO" "ptrdiff_t" "ac_cv_type_ptrdiff_t" "$ac_includes_default"
+if test "x$ac_cv_type_ptrdiff_t" = x""yes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define ptrdiff_t int
+_ACEOF
+
+fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5
$as_echo_n "checking whether struct tm is in sys/time.h or time.h... " >&6; }
if test "${ac_cv_struct_tm+set}" = set; then :
+
: ${CONFIG_STATUS=./config.status}
ac_write_fail=0
ac_clean_files_save=$ac_clean_files
/* CPP Library - lexical analysis.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Per Bothner, 1994-95.
Based on CCCP program by Paul Rubin, June 1986
buffer->notes_used++;
}
+\f
+/* Fast path to find line special characters using optimized character
+ scanning algorithms. Anything complicated falls back to the slow
+ path below. Since this loop is very hot it's worth doing these kinds
+ of optimizations.
+
+ One of the paths through the ifdefs should provide
+
+ const uchar *search_line_fast (const uchar *s, const uchar *end);
+
+ Between S and END, search for \n, \r, \\, ?. Return a pointer to
+ the found character.
+
+ Note that the last character of the buffer is *always* a newline,
+ as forced by _cpp_convert_input. This fact can be used to avoid
+ explicitly looking for the end of the buffer. */
+
+/* Configure gives us an ifdef test. */
+#ifndef WORDS_BIGENDIAN
+#define WORDS_BIGENDIAN 0
+#endif
+
+/* We'd like the largest integer that fits into a register. There's nothing
+ in <stdint.h> that gives us that. For most hosts this is unsigned long,
+ but MS decided on an LLP64 model. Thankfully when building with GCC we
+ can get the "real" word size. */
+#ifdef __GNUC__
+typedef unsigned int word_type __attribute__((__mode__(__word__)));
+#else
+typedef unsigned long word_type;
+#endif
+
+/* The code below is only expecting sizes 4 or 8.
+ Die at compile-time if this expectation is violated. */
+typedef char check_word_type_size
+ [(sizeof(word_type) == 8 || sizeof(word_type) == 4) * 2 - 1];
+
+/* Return X with the first N bytes forced to values that won't match one
+ of the interesting characters. Note that NUL is not interesting. */
+
+static inline word_type
+acc_char_mask_misalign (word_type val, unsigned int n)
+{
+ word_type mask = -1;
+ if (WORDS_BIGENDIAN)
+ mask >>= n * 8;
+ else
+ mask <<= n * 8;
+ return val & mask;
+}
+
+/* Return X replicated to all byte positions within WORD_TYPE. */
+
+static inline word_type
+acc_char_replicate (uchar x)
+{
+ word_type ret;
+
+ ret = (x << 24) | (x << 16) | (x << 8) | x;
+ if (sizeof(word_type) == 8)
+ ret = (ret << 16 << 16) | ret;
+ return ret;
+}
+
+/* Return non-zero if some byte of VAL is (probably) C. */
+
+static inline word_type
+acc_char_cmp (word_type val, word_type c)
+{
+#if defined(__GNUC__) && defined(__alpha__)
+ /* We can get exact results using a compare-bytes instruction.
+ Get (val == c) via (0 >= (val ^ c)). */
+ return __builtin_alpha_cmpbge (0, val ^ c);
+#else
+ word_type magic = 0x7efefefeU;
+ if (sizeof(word_type) == 8)
+ magic = (magic << 16 << 16) | 0xfefefefeU;
+ magic |= 1;
+
+ val ^= c;
+ return ((val + magic) ^ ~val) & ~magic;
+#endif
+}
+
+/* Given the result of acc_char_cmp is non-zero, return the index of
+ the found character. If this was a false positive, return -1. */
+
+static inline int
+acc_char_index (word_type cmp ATTRIBUTE_UNUSED,
+ word_type val ATTRIBUTE_UNUSED)
+{
+#if defined(__GNUC__) && defined(__alpha__) && !WORDS_BIGENDIAN
+ /* The cmpbge instruction sets *bits* of the result corresponding to
+ matches in the bytes with no false positives. */
+ return __builtin_ctzl (cmp);
+#else
+ unsigned int i;
+
+ /* ??? It would be nice to force unrolling here,
+ and have all of these constants folded. */
+ for (i = 0; i < sizeof(word_type); ++i)
+ {
+ uchar c;
+ if (WORDS_BIGENDIAN)
+ c = (val >> (sizeof(word_type) - i - 1) * 8) & 0xff;
+ else
+ c = (val >> i * 8) & 0xff;
+
+ if (c == '\n' || c == '\r' || c == '\\' || c == '?')
+ return i;
+ }
+
+ return -1;
+#endif
+}
+
+/* A version of the fast scanner using bit fiddling techniques.
+
+ For 32-bit words, one would normally perform 16 comparisons and
+ 16 branches. With this algorithm one performs 24 arithmetic
+ operations and one branch. Whether this is faster with a 32-bit
+ word size is going to be somewhat system dependent.
+
+ For 64-bit words, we eliminate twice the number of comparisons
+ and branches without increasing the number of arithmetic operations.
+ It's almost certainly going to be a win with 64-bit word size. */
+
+static const uchar * search_line_acc_char (const uchar *, const uchar *)
+ ATTRIBUTE_UNUSED;
+
+static const uchar *
+search_line_acc_char (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
+{
+ const word_type repl_nl = acc_char_replicate ('\n');
+ const word_type repl_cr = acc_char_replicate ('\r');
+ const word_type repl_bs = acc_char_replicate ('\\');
+ const word_type repl_qm = acc_char_replicate ('?');
+
+ unsigned int misalign;
+ const word_type *p;
+ word_type val, t;
+
+ /* Align the buffer. Mask out any bytes from before the beginning. */
+ p = (word_type *)((uintptr_t)s & -sizeof(word_type));
+ val = *p;
+ misalign = (uintptr_t)s & (sizeof(word_type) - 1);
+ if (misalign)
+ val = acc_char_mask_misalign (val, misalign);
+
+ /* Main loop. */
+ while (1)
+ {
+ t = acc_char_cmp (val, repl_nl);
+ t |= acc_char_cmp (val, repl_cr);
+ t |= acc_char_cmp (val, repl_bs);
+ t |= acc_char_cmp (val, repl_qm);
+
+ if (__builtin_expect (t != 0, 0))
+ {
+ int i = acc_char_index (t, val);
+ if (i >= 0)
+ return (const uchar *)p + i;
+ }
+
+ val = *++p;
+ }
+}
+
+#if (GCC_VERSION >= 4005) && (defined(__i386__) || defined(__x86_64__))
+
+/* Replicated character data to be shared between implementations.
+ Recall that outside of a context with vector support we can't
+ define compatible vector types, therefore these are all defined
+ in terms of raw characters. */
+static const char repl_chars[4][16] __attribute__((aligned(16))) = {
+ { '\n', '\n', '\n', '\n', '\n', '\n', '\n', '\n',
+ '\n', '\n', '\n', '\n', '\n', '\n', '\n', '\n' },
+ { '\r', '\r', '\r', '\r', '\r', '\r', '\r', '\r',
+ '\r', '\r', '\r', '\r', '\r', '\r', '\r', '\r' },
+ { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\',
+ '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' },
+ { '?', '?', '?', '?', '?', '?', '?', '?',
+ '?', '?', '?', '?', '?', '?', '?', '?' },
+};
+
+/* A version of the fast scanner using MMX vectorized byte compare insns.
+
+ This uses the PMOVMSKB instruction which was introduced with "MMX2",
+ which was packaged into SSE1; it is also present in the AMD 3dNOW-A
+ extension. Mark the function as using "sse" so that we emit a real
+ "emms" instruction, rather than the 3dNOW "femms" instruction. */
+
+static const uchar *
+#ifndef __SSE__
+__attribute__((__target__("sse")))
+#endif
+search_line_mmx (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
+{
+ typedef char v8qi __attribute__ ((__vector_size__ (8)));
+ typedef int __m64 __attribute__ ((__vector_size__ (8), __may_alias__));
+
+ const v8qi repl_nl = *(const v8qi *)repl_chars[0];
+ const v8qi repl_cr = *(const v8qi *)repl_chars[1];
+ const v8qi repl_bs = *(const v8qi *)repl_chars[2];
+ const v8qi repl_qm = *(const v8qi *)repl_chars[3];
+
+ unsigned int misalign, found, mask;
+ const v8qi *p;
+ v8qi data, t, c;
+
+ /* Align the source pointer. While MMX doesn't generate unaligned data
+ faults, this allows us to safely scan to the end of the buffer without
+ reading beyond the end of the last page. */
+ misalign = (uintptr_t)s & 7;
+ p = (const v8qi *)((uintptr_t)s & -8);
+ data = *p;
+
+ /* Create a mask for the bytes that are valid within the first
+ 16-byte block. The Idea here is that the AND with the mask
+ within the loop is "free", since we need some AND or TEST
+ insn in order to set the flags for the branch anyway. */
+ mask = -1u << misalign;
+
+ /* Main loop processing 8 bytes at a time. */
+ goto start;
+ do
+ {
+ data = *++p;
+ mask = -1;
+
+ start:
+ t = __builtin_ia32_pcmpeqb(data, repl_nl);
+ c = __builtin_ia32_pcmpeqb(data, repl_cr);
+ t = (v8qi) __builtin_ia32_por ((__m64)t, (__m64)c);
+ c = __builtin_ia32_pcmpeqb(data, repl_bs);
+ t = (v8qi) __builtin_ia32_por ((__m64)t, (__m64)c);
+ c = __builtin_ia32_pcmpeqb(data, repl_qm);
+ t = (v8qi) __builtin_ia32_por ((__m64)t, (__m64)c);
+ found = __builtin_ia32_pmovmskb (t);
+ found &= mask;
+ }
+ while (!found);
+
+ __builtin_ia32_emms ();
+
+ /* FOUND contains 1 in bits for which we matched a relevant
+ character. Conversion to the byte index is trivial. */
+ found = __builtin_ctz(found);
+ return (const uchar *)p + found;
+}
+
+/* A version of the fast scanner using SSE2 vectorized byte compare insns. */
+
+static const uchar *
+#ifndef __SSE2__
+__attribute__((__target__("sse2")))
+#endif
+search_line_sse2 (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
+{
+ typedef char v16qi __attribute__ ((__vector_size__ (16)));
+
+ const v16qi repl_nl = *(const v16qi *)repl_chars[0];
+ const v16qi repl_cr = *(const v16qi *)repl_chars[1];
+ const v16qi repl_bs = *(const v16qi *)repl_chars[2];
+ const v16qi repl_qm = *(const v16qi *)repl_chars[3];
+
+ unsigned int misalign, found, mask;
+ const v16qi *p;
+ v16qi data, t;
+
+ /* Align the source pointer. */
+ misalign = (uintptr_t)s & 15;
+ p = (const v16qi *)((uintptr_t)s & -16);
+ data = *p;
+
+ /* Create a mask for the bytes that are valid within the first
+ 16-byte block. The Idea here is that the AND with the mask
+ within the loop is "free", since we need some AND or TEST
+ insn in order to set the flags for the branch anyway. */
+ mask = -1u << misalign;
+
+ /* Main loop processing 16 bytes at a time. */
+ goto start;
+ do
+ {
+ data = *++p;
+ mask = -1;
+
+ start:
+ t = __builtin_ia32_pcmpeqb128(data, repl_nl);
+ t |= __builtin_ia32_pcmpeqb128(data, repl_cr);
+ t |= __builtin_ia32_pcmpeqb128(data, repl_bs);
+ t |= __builtin_ia32_pcmpeqb128(data, repl_qm);
+ found = __builtin_ia32_pmovmskb128 (t);
+ found &= mask;
+ }
+ while (!found);
+
+ /* FOUND contains 1 in bits for which we matched a relevant
+ character. Conversion to the byte index is trivial. */
+ found = __builtin_ctz(found);
+ return (const uchar *)p + found;
+}
+
+/* A version of the fast scanner using SSE 4.2 vectorized string insns. */
+
+static const uchar *
+#ifndef __SSE4_2__
+__attribute__((__target__("sse4.2")))
+#endif
+search_line_sse42 (const uchar *s, const uchar *end)
+{
+ typedef char v16qi __attribute__ ((__vector_size__ (16)));
+ static const v16qi search = { '\n', '\r', '?', '\\' };
+
+ uintptr_t si = (uintptr_t)s;
+ uintptr_t index;
+
+ /* Check for unaligned input. */
+ if (si & 15)
+ {
+ if (__builtin_expect (end - s < 16, 0)
+ && __builtin_expect ((si & 0xfff) > 0xff0, 0))
+ {
+ /* There are less than 16 bytes left in the buffer, and less
+ than 16 bytes left on the page. Reading 16 bytes at this
+ point might generate a spurious page fault. Defer to the
+ SSE2 implementation, which already handles alignment. */
+ return search_line_sse2 (s, end);
+ }
+
+ /* ??? The builtin doesn't understand that the PCMPESTRI read from
+ memory need not be aligned. */
+ __asm ("%vpcmpestri $0, (%1), %2"
+ : "=c"(index) : "r"(s), "x"(search), "a"(4), "d"(16));
+ if (__builtin_expect (index < 16, 0))
+ goto found;
+
+ /* Advance the pointer to an aligned address. We will re-scan a
+ few bytes, but we no longer need care for reading past the
+ end of a page, since we're guaranteed a match. */
+ s = (const uchar *)((si + 16) & -16);
+ }
+
+ /* Main loop, processing 16 bytes at a time. By doing the whole loop
+ in inline assembly, we can make proper use of the flags set. */
+ __asm ( "sub $16, %1\n"
+ " .balign 16\n"
+ "0: add $16, %1\n"
+ " %vpcmpestri $0, (%1), %2\n"
+ " jnc 0b"
+ : "=&c"(index), "+r"(s)
+ : "x"(search), "a"(4), "d"(16));
+
+ found:
+ return s + index;
+}
+
+/* Check the CPU capabilities. */
+
+#include "../gcc/config/i386/cpuid.h"
+
+typedef const uchar * (*search_line_fast_type) (const uchar *, const uchar *);
+static search_line_fast_type search_line_fast;
+
+static void __attribute__((constructor))
+init_vectorized_lexer (void)
+{
+ unsigned dummy, ecx = 0, edx = 0;
+ search_line_fast_type impl = search_line_acc_char;
+ int minimum = 0;
+
+#if defined(__SSE4_2__)
+ minimum = 3;
+#elif defined(__SSE2__)
+ minimum = 2;
+#elif defined(__SSE__) || defined(__3dNOW_A__)
+ minimum = 1;
+#endif
+
+ if (minimum == 3)
+ impl = search_line_sse42;
+ else if (__get_cpuid (1, &dummy, &dummy, &ecx, &edx) || minimum == 2)
+ {
+ if (minimum == 3 || (ecx & bit_SSE4_2))
+ impl = search_line_sse42;
+ else if (minimum == 2 || (edx & bit_SSE2))
+ impl = search_line_sse2;
+ else if (minimum == 1 || (edx & bit_SSE))
+ impl = search_line_mmx;
+ }
+ else if (__get_cpuid (0x80000001, &dummy, &dummy, &dummy, &edx))
+ {
+ if (minimum == 1 || edx & bit_3DNOWP)
+ impl = search_line_mmx;
+ }
+
+ search_line_fast = impl;
+}
+
+#elif defined(__GNUC__) && defined(__ALTIVEC__)
+
+/* A vection of the fast scanner using AltiVec vectorized byte compares. */
+/* ??? Unfortunately, attribute(target("altivec")) is not yet supported,
+ so we can't compile this function without -maltivec on the command line
+ (or implied by some other switch). */
+
+static const uchar *
+search_line_fast (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
+{
+ typedef __attribute__((altivec(vector))) unsigned char vc;
+
+ const vc repl_nl = {
+ '\n', '\n', '\n', '\n', '\n', '\n', '\n', '\n',
+ '\n', '\n', '\n', '\n', '\n', '\n', '\n', '\n'
+ };
+ const vc repl_cr = {
+ '\r', '\r', '\r', '\r', '\r', '\r', '\r', '\r',
+ '\r', '\r', '\r', '\r', '\r', '\r', '\r', '\r'
+ };
+ const vc repl_bs = {
+ '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\',
+ '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\'
+ };
+ const vc repl_qm = {
+ '?', '?', '?', '?', '?', '?', '?', '?',
+ '?', '?', '?', '?', '?', '?', '?', '?',
+ };
+ const vc ones = {
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ };
+ const vc zero = { 0 };
+
+ vc data, mask, t;
+
+ /* Altivec loads automatically mask addresses with -16. This lets us
+ issue the first load as early as possible. */
+ data = __builtin_vec_ld(0, (const vc *)s);
+
+ /* Discard bytes before the beginning of the buffer. Do this by
+ beginning with all ones and shifting in zeros according to the
+ mis-alignment. The LVSR instruction pulls the exact shift we
+ want from the address. */
+ mask = __builtin_vec_lvsr(0, s);
+ mask = __builtin_vec_perm(zero, ones, mask);
+ data &= mask;
+
+ /* While altivec loads mask addresses, we still need to align S so
+ that the offset we compute at the end is correct. */
+ s = (const uchar *)((uintptr_t)s & -16);
+
+ /* Main loop processing 16 bytes at a time. */
+ goto start;
+ do
+ {
+ vc m_nl, m_cr, m_bs, m_qm;
+
+ s += 16;
+ data = __builtin_vec_ld(0, (const vc *)s);
+
+ start:
+ m_nl = (vc) __builtin_vec_cmpeq(data, repl_nl);
+ m_cr = (vc) __builtin_vec_cmpeq(data, repl_cr);
+ m_bs = (vc) __builtin_vec_cmpeq(data, repl_bs);
+ m_qm = (vc) __builtin_vec_cmpeq(data, repl_qm);
+ t = (m_nl | m_cr) | (m_bs | m_qm);
+
+ /* T now contains 0xff in bytes for which we matched one of the relevant
+ characters. We want to exit the loop if any byte in T is non-zero.
+ Below is the expansion of vec_any_ne(t, zero). */
+ }
+ while (!__builtin_vec_vcmpeq_p(/*__CR6_LT_REV*/3, t, zero));
+
+ {
+#define N (sizeof(vc) / sizeof(long))
+
+ typedef char check_count[(N == 2 || N == 4) * 2 - 1];
+ union {
+ vc v;
+ unsigned long l[N];
+ } u;
+ unsigned long l, i = 0;
+
+ u.v = t;
+
+ /* Find the first word of T that is non-zero. */
+ switch (N)
+ {
+ case 4:
+ l = u.l[i++];
+ if (l != 0)
+ break;
+ s += sizeof(unsigned long);
+ l = u.l[i++];
+ if (l != 0)
+ break;
+ s += sizeof(unsigned long);
+ case 2:
+ l = u.l[i++];
+ if (l != 0)
+ break;
+ s += sizeof(unsigned long);
+ l = u.l[i];
+ }
+
+ /* L now contains 0xff in bytes for which we matched one of the
+ relevant characters. We can find the byte index by finding
+ its bit index and dividing by 8. */
+ l = __builtin_clzl(l) >> 3;
+ return s + l;
+
+#undef N
+ }
+}
+
+#else
+
+/* We only have one accellerated alternative. Use a direct call so that
+ we encourage inlining. */
+
+#define search_line_fast search_line_acc_char
+
+#endif
+
/* Returns with a logical line that contains no escaped newlines or
trigraphs. This is a time-critical inner loop. */
void
buffer->cur_note = buffer->notes_used = 0;
buffer->cur = buffer->line_base = buffer->next_line;
buffer->need_line = false;
- s = buffer->next_line - 1;
+ s = buffer->next_line;
if (!buffer->from_stage3)
{
const uchar *pbackslash = NULL;
- /* Short circuit for the common case of an un-escaped line with
+ /* Fast path. This is the common case of an un-escaped line with
no trigraphs. The primary win here is by not writing any
data back to memory until we have to. */
- for (;;)
+ while (1)
{
- c = *++s;
- if (__builtin_expect (c == '\n', false)
- || __builtin_expect (c == '\r', false))
- {
- d = (uchar *) s;
+ /* Perform an optimized search for \n, \r, \\, ?. */
+ s = search_line_fast (s, buffer->rlimit);
- if (__builtin_expect (s == buffer->rlimit, false))
- goto done;
-
- /* DOS line ending? */
- if (__builtin_expect (c == '\r', false)
- && s[1] == '\n')
- {
- s++;
- if (s == buffer->rlimit)
- goto done;
- }
-
- if (__builtin_expect (pbackslash == NULL, true))
- goto done;
-
- /* Check for escaped newline. */
- p = d;
- while (is_nvspace (p[-1]))
- p--;
- if (p - 1 != pbackslash)
- goto done;
-
- /* Have an escaped newline; process it and proceed to
- the slow path. */
- add_line_note (buffer, p - 1, p != d ? ' ' : '\\');
- d = p - 2;
- buffer->next_line = p - 1;
- break;
+ c = *s;
+ if (c == '\\')
+ {
+ /* Record the location of the backslash and continue. */
+ pbackslash = s++;
}
- if (__builtin_expect (c == '\\', false))
- pbackslash = s;
- else if (__builtin_expect (c == '?', false)
- && __builtin_expect (s[1] == '?', false)
- && _cpp_trigraph_map[s[2]])
+ else if (__builtin_expect (c == '?', 0))
{
- /* Have a trigraph. We may or may not have to convert
- it. Add a line note regardless, for -Wtrigraphs. */
- add_line_note (buffer, s, s[2]);
- if (CPP_OPTION (pfile, trigraphs))
+ if (__builtin_expect (s[1] == '?', false)
+ && _cpp_trigraph_map[s[2]])
{
- /* We do, and that means we have to switch to the
- slow path. */
- d = (uchar *) s;
- *d = _cpp_trigraph_map[s[2]];
- s += 2;
- break;
+ /* Have a trigraph. We may or may not have to convert
+ it. Add a line note regardless, for -Wtrigraphs. */
+ add_line_note (buffer, s, s[2]);
+ if (CPP_OPTION (pfile, trigraphs))
+ {
+ /* We do, and that means we have to switch to the
+ slow path. */
+ d = (uchar *) s;
+ *d = _cpp_trigraph_map[s[2]];
+ s += 2;
+ goto slow_path;
+ }
}
+ /* Not a trigraph. Continue on fast-path. */
+ s++;
}
+ else
+ break;
}
+ /* This must be \r or \n. We're either done, or we'll be forced
+ to write back to the buffer and continue on the slow path. */
+ d = (uchar *) s;
+
+ if (__builtin_expect (s == buffer->rlimit, false))
+ goto done;
+
+ /* DOS line ending? */
+ if (__builtin_expect (c == '\r', false) && s[1] == '\n')
+ {
+ s++;
+ if (s == buffer->rlimit)
+ goto done;
+ }
+
+ if (__builtin_expect (pbackslash == NULL, true))
+ goto done;
+
+ /* Check for escaped newline. */
+ p = d;
+ while (is_nvspace (p[-1]))
+ p--;
+ if (p - 1 != pbackslash)
+ goto done;
+
+ /* Have an escaped newline; process it and proceed to
+ the slow path. */
+ add_line_note (buffer, p - 1, p != d ? ' ' : '\\');
+ d = p - 2;
+ buffer->next_line = p - 1;
- for (;;)
+ slow_path:
+ while (1)
{
c = *++s;
*++d = c;
if (c == '\n' || c == '\r')
{
- /* Handle DOS line endings. */
+ /* Handle DOS line endings. */
if (c == '\r' && s != buffer->rlimit && s[1] == '\n')
s++;
if (s == buffer->rlimit)
}
else
{
- do
+ while (*s != '\n' && *s != '\r')
s++;
- while (*s != '\n' && *s != '\r');
d = (uchar *) s;
/* Handle DOS line endings. */
projects / platform / upstream / linaro-gcc.git / commitdiff