2015-02-26 Steve Ellcey <sellcey@imgtec.com>
* libc/machine/mips/memcpy.S: Fix macro indentation and typos in comments.
This commit is contained in:
Steve Ellcey
parent
0fb41ffa65
commit
d2f9dbb3ee
|
|
@ -1,3 +1,8 @@
|
|||
2015-02-26 Steve Ellcey <sellcey@imgtec.com>
|
||||
|
||||
* libc/machine/mips/memcpy.S: Fix macro indentation and typos in
|
||||
comments.
|
||||
|
||||
2015-02-24 Jon TURNEY <jon.turney@dronecode.org.uk>
|
||||
|
||||
* libc/include/sys/cdefs.h (_GNU_SOURCE): Move check so it has an
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2012
|
||||
* Copyright (c) 2012-2015
|
||||
* MIPS Technologies, Inc., California.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
|
|
@ -28,25 +28,25 @@
|
|||
*/
|
||||
|
||||
#ifdef ANDROID_CHANGES
|
||||
#include "machine/asm.h"
|
||||
#include "machine/regdef.h"
|
||||
#define USE_MEMMOVE_FOR_OVERLAP
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
# include "machine/asm.h"
|
||||
# include "machine/regdef.h"
|
||||
# define USE_MEMMOVE_FOR_OVERLAP
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#elif _LIBC
|
||||
#include <sysdep.h>
|
||||
#include <regdef.h>
|
||||
#include <sys/asm.h>
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
# include <sysdep.h>
|
||||
# include <regdef.h>
|
||||
# include <sys/asm.h>
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#elif _COMPILING_NEWLIB
|
||||
#include "machine/asm.h"
|
||||
#include "machine/regdef.h"
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
# include "machine/asm.h"
|
||||
# include "machine/regdef.h"
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#else
|
||||
#include <regdef.h>
|
||||
#include <sys/asm.h>
|
||||
# include <regdef.h>
|
||||
# include <sys/asm.h>
|
||||
#endif
|
||||
|
||||
/* Check to see if the MIPS architecture we are compiling for supports
|
||||
|
|
@ -54,44 +54,44 @@
|
|||
*/
|
||||
|
||||
#if (__mips == 4) || (__mips == 5) || (__mips == 32) || (__mips == 64)
|
||||
#ifndef DISABLE_PREFETCH
|
||||
#define USE_PREFETCH
|
||||
#endif
|
||||
# ifndef DISABLE_PREFETCH
|
||||
# define USE_PREFETCH
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if defined(_MIPS_SIM) && ((_MIPS_SIM == _ABI64) || (_MIPS_SIM == _ABIN32))
|
||||
#ifndef DISABLE_DOUBLE
|
||||
#define USE_DOUBLE
|
||||
#endif
|
||||
# ifndef DISABLE_DOUBLE
|
||||
# define USE_DOUBLE
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/* Some asm.h files do not have the L macro definition. */
|
||||
#ifndef L
|
||||
#if _MIPS_SIM == _ABIO32
|
||||
# define L(label) $L ## label
|
||||
#else
|
||||
# define L(label) .L ## label
|
||||
#endif
|
||||
# if _MIPS_SIM == _ABIO32
|
||||
# define L(label) $L ## label
|
||||
# else
|
||||
# define L(label) .L ## label
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Some asm.h files do not have the PTR_ADDIU macro definition. */
|
||||
#ifndef PTR_ADDIU
|
||||
#ifdef USE_DOUBLE
|
||||
#define PTR_ADDIU daddiu
|
||||
#else
|
||||
#define PTR_ADDIU addiu
|
||||
#endif
|
||||
# ifdef USE_DOUBLE
|
||||
# define PTR_ADDIU daddiu
|
||||
# else
|
||||
# define PTR_ADDIU addiu
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Some asm.h files do not have the PTR_SRA macro definition. */
|
||||
#ifndef PTR_SRA
|
||||
#ifdef USE_DOUBLE
|
||||
#define PTR_SRA dsra
|
||||
#else
|
||||
#define PTR_SRA sra
|
||||
#endif
|
||||
# ifdef USE_DOUBLE
|
||||
# define PTR_SRA dsra
|
||||
# else
|
||||
# define PTR_SRA sra
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
|
|
@ -141,12 +141,12 @@
|
|||
* If we have not picked out what hints to use at this point use the
|
||||
* standard load and store prefetch hints.
|
||||
*/
|
||||
#ifndef PREFETCH_STORE_HINT
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_STORE
|
||||
#endif
|
||||
#ifndef PREFETCH_LOAD_HINT
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD
|
||||
#endif
|
||||
# ifndef PREFETCH_STORE_HINT
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_STORE
|
||||
# endif
|
||||
# ifndef PREFETCH_LOAD_HINT
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD
|
||||
# endif
|
||||
|
||||
/*
|
||||
* We double everything when USE_DOUBLE is true so we do 2 prefetches to
|
||||
|
|
@ -154,43 +154,43 @@
|
|||
* prefetch brings in 32 bytes.
|
||||
*/
|
||||
|
||||
#ifdef USE_DOUBLE
|
||||
# define PREFETCH_CHUNK 64
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
# ifdef USE_DOUBLE
|
||||
# define PREFETCH_CHUNK 64
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
pref PREFETCH_LOAD_HINT, (chunk)*64(reg); \
|
||||
pref PREFETCH_LOAD_HINT, ((chunk)*64)+32(reg)
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
pref PREFETCH_STORE_HINT, (chunk)*64(reg); \
|
||||
pref PREFETCH_STORE_HINT, ((chunk)*64)+32(reg)
|
||||
#else
|
||||
# define PREFETCH_CHUNK 32
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
# else
|
||||
# define PREFETCH_CHUNK 32
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
pref PREFETCH_LOAD_HINT, (chunk)*32(reg)
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
pref PREFETCH_STORE_HINT, (chunk)*32(reg)
|
||||
#endif
|
||||
# endif
|
||||
/* MAX_PREFETCH_SIZE is the maximum size of a prefetch, it must not be less
|
||||
* then PREFETCH_CHUNK, the assumed size of each prefetch. If the real size
|
||||
* of a prefetch is greater then MAX_PREFETCH_SIZE and the PREPAREFORSTORE
|
||||
* hint is used, the code will not work corrrectly. If PREPAREFORSTORE is not
|
||||
* than PREFETCH_CHUNK, the assumed size of each prefetch. If the real size
|
||||
* of a prefetch is greater than MAX_PREFETCH_SIZE and the PREPAREFORSTORE
|
||||
* hint is used, the code will not work correctly. If PREPAREFORSTORE is not
|
||||
* used then MAX_PREFETCH_SIZE does not matter. */
|
||||
#define MAX_PREFETCH_SIZE 128
|
||||
/* PREFETCH_LIMIT is set based on the fact that we neve use an offset greater
|
||||
* then 5 on a STORE prefetch and that a single prefetch can never be larger
|
||||
* then MAX_PREFETCH_SIZE. We add the extra 32 when USE_DOUBLE is set because
|
||||
# define MAX_PREFETCH_SIZE 128
|
||||
/* PREFETCH_LIMIT is set based on the fact that we never use an offset greater
|
||||
* than 5 on a STORE prefetch and that a single prefetch can never be larger
|
||||
* than MAX_PREFETCH_SIZE. We add the extra 32 when USE_DOUBLE is set because
|
||||
* we actually do two prefetches in that case, one 32 bytes after the other. */
|
||||
#ifdef USE_DOUBLE
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + 32 + MAX_PREFETCH_SIZE
|
||||
#else
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + MAX_PREFETCH_SIZE
|
||||
#endif
|
||||
#if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE) \
|
||||
# ifdef USE_DOUBLE
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + 32 + MAX_PREFETCH_SIZE
|
||||
# else
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + MAX_PREFETCH_SIZE
|
||||
# endif
|
||||
# if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE) \
|
||||
&& ((PREFETCH_CHUNK * 4) < MAX_PREFETCH_SIZE)
|
||||
/* We cannot handle this because the initial prefetches may fetch bytes that
|
||||
* are before the buffer being copied. We start copies with an offset
|
||||
* are before the buffer being copied. We start copies with an offset
|
||||
* of 4 so avoid this situation when using PREPAREFORSTORE. */
|
||||
#error "PREFETCH_CHUNK is too large and/or MAX_PREFETCH_SIZE is too small."
|
||||
#endif
|
||||
# endif
|
||||
#else /* USE_PREFETCH not defined */
|
||||
# define PREFETCH_FOR_LOAD(offset, reg)
|
||||
# define PREFETCH_FOR_STORE(offset, reg)
|
||||
|
|
@ -198,7 +198,7 @@
|
|||
|
||||
/* Allow the routine to be named something else if desired. */
|
||||
#ifndef MEMCPY_NAME
|
||||
#define MEMCPY_NAME memcpy
|
||||
# define MEMCPY_NAME memcpy
|
||||
#endif
|
||||
|
||||
/* We use these 32/64 bit registers as temporaries to do the copying. */
|
||||
|
|
@ -207,15 +207,15 @@
|
|||
#define REG2 t2
|
||||
#define REG3 t3
|
||||
#if defined(_MIPS_SIM) && (_MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIO64)
|
||||
# define REG4 t4
|
||||
# define REG5 t5
|
||||
# define REG6 t6
|
||||
# define REG7 t7
|
||||
# define REG4 t4
|
||||
# define REG5 t5
|
||||
# define REG6 t6
|
||||
# define REG7 t7
|
||||
#else
|
||||
# define REG4 ta0
|
||||
# define REG5 ta1
|
||||
# define REG6 ta2
|
||||
# define REG7 ta3
|
||||
# define REG4 ta0
|
||||
# define REG5 ta1
|
||||
# define REG6 ta2
|
||||
# define REG7 ta3
|
||||
#endif
|
||||
|
||||
/* We load/store 64 bits at a time when USE_DOUBLE is true.
|
||||
|
|
@ -223,44 +223,44 @@
|
|||
* conflicts with system header files. */
|
||||
|
||||
#ifdef USE_DOUBLE
|
||||
# define C_ST sd
|
||||
# define C_LD ld
|
||||
#if __MIPSEB
|
||||
# define C_ST sd
|
||||
# define C_LD ld
|
||||
# if __MIPSEB
|
||||
# define C_LDHI ldl /* high part is left in big-endian */
|
||||
# define C_STHI sdl /* high part is left in big-endian */
|
||||
# define C_LDLO ldr /* low part is right in big-endian */
|
||||
# define C_STLO sdr /* low part is right in big-endian */
|
||||
#else
|
||||
# else
|
||||
# define C_LDHI ldr /* high part is right in little-endian */
|
||||
# define C_STHI sdr /* high part is right in little-endian */
|
||||
# define C_LDLO ldl /* low part is left in little-endian */
|
||||
# define C_STLO sdl /* low part is left in little-endian */
|
||||
#endif
|
||||
# endif
|
||||
#else
|
||||
# define C_ST sw
|
||||
# define C_LD lw
|
||||
#if __MIPSEB
|
||||
# define C_ST sw
|
||||
# define C_LD lw
|
||||
# if __MIPSEB
|
||||
# define C_LDHI lwl /* high part is left in big-endian */
|
||||
# define C_STHI swl /* high part is left in big-endian */
|
||||
# define C_LDLO lwr /* low part is right in big-endian */
|
||||
# define C_STLO swr /* low part is right in big-endian */
|
||||
#else
|
||||
# else
|
||||
# define C_LDHI lwr /* high part is right in little-endian */
|
||||
# define C_STHI swr /* high part is right in little-endian */
|
||||
# define C_LDLO lwl /* low part is left in little-endian */
|
||||
# define C_STLO swl /* low part is left in little-endian */
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Bookkeeping values for 32 vs. 64 bit mode. */
|
||||
#ifdef USE_DOUBLE
|
||||
# define NSIZE 8
|
||||
# define NSIZEMASK 0x3f
|
||||
# define NSIZEDMASK 0x7f
|
||||
# define NSIZE 8
|
||||
# define NSIZEMASK 0x3f
|
||||
# define NSIZEDMASK 0x7f
|
||||
#else
|
||||
# define NSIZE 4
|
||||
# define NSIZEMASK 0x1f
|
||||
# define NSIZEDMASK 0x3f
|
||||
# define NSIZE 4
|
||||
# define NSIZEMASK 0x1f
|
||||
# define NSIZEDMASK 0x3f
|
||||
#endif
|
||||
#define UNIT(unit) ((unit)*NSIZE)
|
||||
#define UNITM1(unit) (((unit)*NSIZE)-1)
|
||||
|
|
@ -290,7 +290,7 @@ LEAF(MEMCPY_NAME)
|
|||
L(memcpy):
|
||||
#endif
|
||||
/*
|
||||
* If the size is less then 2*NSIZE (8 or 16), go to L(lastb). Regardless of
|
||||
* If the size is less than 2*NSIZE (8 or 16), go to L(lastb). Regardless of
|
||||
* size, copy dst pointer to v0 for the return value.
|
||||
*/
|
||||
slti t2,a2,(2 * NSIZE)
|
||||
|
|
@ -354,22 +354,22 @@ L(aligned):
|
|||
PREFETCH_FOR_STORE (3, a0)
|
||||
#endif
|
||||
#if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
|
||||
#if PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE
|
||||
# if PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE
|
||||
sltu v1,t9,a0
|
||||
bgtz v1,L(skip_set)
|
||||
nop
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*4)
|
||||
L(skip_set):
|
||||
#else
|
||||
# else
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*1)
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
#if defined(RETURN_LAST_PREFETCH) && defined(USE_PREFETCH) \
|
||||
&& (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*3)
|
||||
#ifdef USE_DOUBLE
|
||||
# ifdef USE_DOUBLE
|
||||
PTR_ADDIU v0,v0,32
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
L(loop16w):
|
||||
C_LD t0,UNIT(0)(a1)
|
||||
|
|
@ -382,9 +382,9 @@ L(loop16w):
|
|||
PREFETCH_FOR_STORE (5, a0)
|
||||
#if defined(RETURN_LAST_PREFETCH) && defined(USE_PREFETCH)
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*5)
|
||||
#ifdef USE_DOUBLE
|
||||
# ifdef USE_DOUBLE
|
||||
PTR_ADDIU v0,v0,32
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
L(skip_pref):
|
||||
C_LD REG2,UNIT(2)(a1)
|
||||
|
|
@ -458,7 +458,7 @@ L(chkw):
|
|||
PTR_ADDIU a0,a0,UNIT(8)
|
||||
|
||||
/*
|
||||
* Here we have less then 32(64) bytes to copy. Set up for a loop to
|
||||
* Here we have less than 32(64) bytes to copy. Set up for a loop to
|
||||
* copy one word (or double word) at a time. Set a2 to count how many
|
||||
* bytes we have to copy after all the word (or double word) chunks are
|
||||
* copied and a3 to the dst pointer after all the (d)word chunks have
|
||||
|
|
@ -538,15 +538,15 @@ L(ua_chk16w):
|
|||
PREFETCH_FOR_STORE (3, a0)
|
||||
#endif
|
||||
#if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
|
||||
#if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
# if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
sltu v1,t9,a0
|
||||
bgtz v1,L(ua_skip_set)
|
||||
nop
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*4)
|
||||
L(ua_skip_set):
|
||||
#else
|
||||
# else
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*1)
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
L(ua_loop16w):
|
||||
PREFETCH_FOR_LOAD (3, a1)
|
||||
|
|
@ -650,7 +650,7 @@ L(ua_chkw):
|
|||
C_ST REG7,UNIT(7)(a0)
|
||||
PTR_ADDIU a0,a0,UNIT(8)
|
||||
/*
|
||||
* Here we have less then 32(64) bytes to copy. Set up for a loop to
|
||||
* Here we have less than 32(64) bytes to copy. Set up for a loop to
|
||||
* copy one word (or double word) at a time.
|
||||
*/
|
||||
L(ua_chk1w):
|
||||
|
|
@ -686,7 +686,7 @@ L(ua_smallCopy_loop):
|
|||
.set reorder
|
||||
END(MEMCPY_NAME)
|
||||
#ifndef ANDROID_CHANGES
|
||||
#ifdef _LIBC
|
||||
# ifdef _LIBC
|
||||
libc_hidden_builtin_def (MEMCPY_NAME)
|
||||
#endif
|
||||
# endif
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue