On Tue, Dec 16, 2008 at 05:36:32PM -0800, [email protected] wrote:
>Author: vda
>Date: 2008-12-16 17:36:31 -0800 (Tue, 16 Dec 2008)
>New Revision: 24435
>
>Log:
>since gcc -Os hates us and does not inline string ops,
I don't remember offhand if we deliberately turned them off.
>implement inline versions of some of them.
>Enable only those which result roughly in the same
>code size as using out-or-line versions.
>
>None of this affects users, installed headers won't have
>any trace of it.
>+static __always_inline
>+void *inlined_memchr_const_c(const void *s, int c, size_t count)
>+{
>+ void *edi;
>+ int ecx, eax;
>+ __asm__ __volatile__(
>+ " jecxz 1f\n"
>+ " movb %4, %%al\n" /* const c to %%al */
>+ " repne; scasb\n"
>+ " leal -1(%%edi), %%edi\n"
>+ " je 2f\n"
>+ "1:\n"
>+ " xorl %%edi, %%edi\n"
>+ "2:\n"
>+ : "=&D" (edi), "=&c" (ecx), "=&a" (eax)
>+ : "0" (s), "i" (c), "1" (count)
>+ /* : no clobbers */
>+ );
Are you sure? Sounds like there is a bug somewhere for it works with any
optimization level on gcc 4.4 as opposed to anything earlier:
gcc -c libc/stdio/_fwrite.c -o libc/stdio/_fwrite.os -include
./include/libc-symbols.h -Wall -Wstrict-prototypes -fno-strict-aliasing
-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute
-Wformat=2 -Wmissing-prototypes -Wmissing-declarations -Wnonnull -Wundef
-funsigned-char -fno-builtin -fno-asm -std=gnu99 -ffunction-sections
-fdata-sections -m32 -fstack-protector -nostdinc -I./include -I.
-I./libc/sysdeps/linux/i386 -DUCLIBC_INTERNAL -O0 -g3
-I./libpthread/linuxthreads/sysdeps/unix/sysv/linux/i386
-I./libpthread/linuxthreads/sysdeps/i386
-I./libpthread/linuxthreads/sysdeps/unix/sysv/linux
-I./libpthread/linuxthreads/sysdeps/pthread -I./libpthread/linuxthreads
-I./libpthread -I/usr/include/
-I/usr/lib/gcc/i486-linux-gnu/4.3.3/include-fixed
-I/usr/lib/gcc/i486-linux-gnu/4.3.3/include -DNDEBUG -DMALLOC_DEBUGGING
-DHEAP_DEBUGGING -fPIC -MT libc/stdio/_fwrite.os -MD -MP -MF
libc/stdio/._fwrite.os.dep
./include/libc-string_i386.h: In function '__stdio_fwrite':
./include/libc-string_i386.h:293: warning: asm operand 4 probably doesn't match
constraints
./include/libc-string_i386.h:293: error: impossible constraint in 'asm'
>+ return edi;
>+}
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