diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc64/le')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/power9/stpcpy.S | 24 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/power9/strcpy.S | 73 |
2 files changed, 82 insertions, 15 deletions
diff --git a/sysdeps/powerpc/powerpc64/le/power9/stpcpy.S b/sysdeps/powerpc/powerpc64/le/power9/stpcpy.S new file mode 100644 index 0000000000..44425cb1e8 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/power9/stpcpy.S @@ -0,0 +1,24 @@ +/* Optimized stpcpy implementation for PowerPC64/POWER9. + Copyright (C) 2015-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#define USE_AS_STPCPY +#include <sysdeps/powerpc/powerpc64/le/power9/strcpy.S> + +weak_alias (__stpcpy, stpcpy) +libc_hidden_def (__stpcpy) +libc_hidden_builtin_def (stpcpy) diff --git a/sysdeps/powerpc/powerpc64/le/power9/strcpy.S b/sysdeps/powerpc/powerpc64/le/power9/strcpy.S index 5749228054..ce8f503291 100644 --- a/sysdeps/powerpc/powerpc64/le/power9/strcpy.S +++ b/sysdeps/powerpc/powerpc64/le/power9/strcpy.S @@ -18,19 +18,35 @@ #include <sysdep.h> -#ifndef STRCPY -# define STRCPY strcpy -#endif +#ifdef USE_AS_STPCPY +# ifndef STPCPY +# define FUNC_NAME __stpcpy +# else +# define FUNC_NAME STPCPY +# endif +#else +# ifndef STRCPY +# define FUNC_NAME strcpy +# else +# define FUNC_NAME STRCPY +# endif +#endif /* !USE_AS_STPCPY */ /* Implements the function char * [r3] strcpy (char *dest [r3], const char *src [r4]) + or + + char * [r3] stpcpy (char *dest [r3], const char *src [r4]) + + if USE_AS_STPCPY is defined. + The implementation can load bytes past a null terminator, but only up to the next 16B boundary, so it never crosses a page. */ .machine power9 -ENTRY_TOCLESS (STRCPY, 4) +ENTRY_TOCLESS (FUNC_NAME, 4) CALL_MCOUNT 2 /* NULL string optimisation */ @@ -53,8 +69,8 @@ ENTRY_TOCLESS (STRCPY, 4) vperm v0,v18,v0,v1 vcmpequb v6,v0,v18 /* 0xff if byte is NULL, 0x00 otherwise */ - vctzlsbb r8,v6 /* Number of trailing zeroes */ - addi r8,r8,1 /* Add null terminator */ + vctzlsbb r7,v6 /* Number of trailing zeroes */ + addi r8,r7,1 /* Add null terminator */ /* r8 = bytes including null r9 = bytes to get source 16B aligned @@ -68,6 +84,11 @@ ENTRY_TOCLESS (STRCPY, 4) sldi r10,r8,56 /* stxvl wants size in top 8 bits */ stxvl 32+v0,r11,r10 /* Partial store */ +#ifdef USE_AS_STPCPY + /* stpcpy returns the dest address plus the size not counting the + final '\0'. */ + add r3,r11,r7 +#endif blr L(no_null): @@ -106,28 +127,43 @@ L(loop): L(tail1): vctzlsbb r8,v6 - addi r8,r8,1 - sldi r9,r8,56 /* stxvl wants size in top 8 bits */ + addi r9,r8,1 + sldi r9,r9,56 /* stxvl wants size in top 8 bits */ stxvl 32+v0,r11,r9 +#ifdef USE_AS_STPCPY + /* stpcpy returns the dest address plus the size not counting the + final '\0'. */ + add r3,r11,r8 +#endif blr L(tail2): stxv 32+v0,0(r11) vctzlsbb r8,v6 /* Number of trailing zeroes */ - addi r8,r8,1 /* Add null terminator */ - sldi r10,r8,56 /* stxvl wants size in top 8 bits */ + addi r9,r8,1 /* Add null terminator */ + sldi r10,r9,56 /* stxvl wants size in top 8 bits */ addi r11,r11,16 stxvl 32+v1,r11,r10 /* Partial store */ +#ifdef USE_AS_STPCPY + /* stpcpy returns the dest address plus the size not counting the + final '\0'. */ + add r3,r11,r8 +#endif blr L(tail3): stxv 32+v0,0(r11) stxv 32+v1,16(r11) vctzlsbb r8,v6 /* Number of trailing zeroes */ - addi r8,r8,1 /* Add null terminator */ - sldi r10,r8,56 /* stxvl wants size in top 8 bits */ + addi r9,r8,1 /* Add null terminator */ + sldi r10,r9,56 /* stxvl wants size in top 8 bits */ addi r11,r11,32 stxvl 32+v2,r11,r10 /* Partial store */ +#ifdef USE_AS_STPCPY + /* stpcpy returns the dest address plus the size not counting the + final '\0'. */ + add r3,r11,r8 +#endif blr L(tail4): @@ -135,10 +171,17 @@ L(tail4): stxv 32+v1,16(r11) stxv 32+v2,32(r11) vctzlsbb r8,v6 /* Number of trailing zeroes */ - addi r8,r8,1 /* Add null terminator */ - sldi r10,r8,56 /* stxvl wants size in top 8 bits */ + addi r9,r8,1 /* Add null terminator */ + sldi r10,r9,56 /* stxvl wants size in top 8 bits */ addi r11,r11,48 stxvl 32+v3,r11,r10 /* Partial store */ +#ifdef USE_AS_STPCPY + /* stpcpy returns the dest address plus the size not counting the + final '\0'. */ + add r3,r11,r8 +#endif blr -END (STRCPY) +END (FUNC_NAME) +#ifndef USE_AS_STPCPY libc_hidden_builtin_def (strcpy) +#endif |