Attachment 1475891 Details for Bug 1615823 – working path with memcpy (often <= 4 bytes)

working path with memcpy (often <= 4 bytes)

tegra20-gdb-memcpy_vfp_aligned.txt (text/plain), 1.59 KB, created by Nicolas Chauvet (kwizart) on 2018-08-14 14:53:34 UTC

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Creator: Nicolas Chauvet (kwizart)

Created: 2018-08-14 14:53:34 UTC

Size: 1.59 KB

patch

obsolete

>Breakpoint 1, __memcpy_vfp () at ../sysdeps/arm/armv7/multiarch/memcpy_impl.S:269
>269		mov	dst, dstin	/* Preserve dstin, we need to return it.  */
>(gdb) next
>270		cmp	count, #64
>(gdb) nexti
>271		bge	.Lcpy_not_short
>(gdb) nexti
>301		and	tmp1, count, #0x3c
>(gdb) nexti
>302		add	dst, dst, tmp1
>(gdb) nexti
>303		add	src, src, tmp1
>(gdb) nexti
>309		dispatch_15_word
>(gdb) nexti
>0xb6eef15c	309		dispatch_15_word
>(gdb) nexti
>0xb6eef1c8	309		dispatch_15_word
>(gdb) nexti
>0xb6eef1cc	309		dispatch_15_word
>(gdb) nexti
>0xb6eef1d0	309		dispatch_15_word
>(gdb) nexti
>0xb6eef1d4	309		dispatch_15_word
>(gdb) nexti
>312		lsls	count, count, #31
>(gdb) nexti
>313		ldrhcs	tmp1, [src], #2
>(gdb) nexti
>314		ldrbne	src, [src]		/* Src is dead, use as a scratch.  */
>(gdb) nexti
>315		strhcs	tmp1, [dst], #2
>(gdb) nexti
>316		strbne	src, [dst]
>(gdb) nexti
>317		bx	lr
>(gdb) nexti
>0xb6ee8408 in __GI___mempcpy (dest=<optimized out>, src=src@entry=0xbefff378, len=len@entry=9) at mempcpy.c:35
>35	  return memcpy (dest, src, len) + len;
>(gdb) nexti
>0xb6ee840c	35	  return memcpy (dest, src, len) + len;
>(gdb) nexti
>0xb6ed8e2c in _IO_new_file_xsputn (f=0xb6fb7da0 <_IO_2_1_stdout_>, data=0xbefff378, n=9) at fileops.c:1258
>1258	      f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
>(gdb) nexti
>0xb6ed8e30	1258	      f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
>(gdb) nexti
>1260	      to_do -= count;
>(gdb) nexti
>1262	  if (to_do + must_flush > 0)
>(gdb) nexti
>0xb6ed8e3c	1262	  if (to_do + must_flush > 0)
>(gdb) nexti
>0xb6ed8e40	1262	  if (to_do + must_flush > 0)
>(gdb) nexti
>0xb6ed8e44	1262	  if (to_do + must_flush > 0)
>(gdb) nexti

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Attachments on bug 1615823: 1475790 | 1475891 | 1475892