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/*
* Copyright (c) 2005 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <machine/float.h>
#include <string.h>
/* Memory accesses. */
#define Load 0x01
#define Store 0x02
/* Data type. */
#define Integer 0x11
#define FloatingPoint 0x12
/* Data size. */
#define Small 0x21
#define Medium 0x22
#define Large 0x23
/* Post increment. */
#define NoPostInc 0x31
#define MinConstPostInc 0x32
#define PlusConstPostInc 0x33
#define ScratchRegPostInc 0x34
#define PreservedRegPostInc 0x35
#if ACCESS == 0 || TYPE == 0 || SIZE == 0 || POSTINC == 0
#error define ACCESS, TYPE, SIZE and/or POSTINC
#endif
#if TYPE == Integer
# define REG "r8"
# if SIZE == Small
# define DATA_TYPE short
# define DATA_VALUE 0x1234
# define LD "ld2"
# define ST "st2"
# elif SIZE == Medium
# define DATA_TYPE int
# define DATA_VALUE 0x12345678
# define LD "ld4"
# define ST "st4"
# elif SIZE == Large
# define DATA_TYPE long
# define DATA_VALUE 0x1234567890ABCDEF
# define LD "ld8"
# define ST "st8"
# endif
#elif TYPE == FloatingPoint
# define REG "f6"
# if SIZE == Small
# define DATA_TYPE float
# define DATA_VALUE FLT_MIN
# define LD "ldfs"
# define ST "stfs"
# elif SIZE == Medium
# define DATA_TYPE double
# define DATA_VALUE DBL_MIN
# define LD "ldfd"
# define ST "stfd"
# elif SIZE == Large
# define DATA_TYPE long double
# define DATA_VALUE LDBL_MIN
# define LD "ldfe"
# define ST "stfe"
# endif
#endif
struct {
DATA_TYPE aligned;
char _;
char misaligned[sizeof(DATA_TYPE)];
} data;
DATA_TYPE *aligned = &data.aligned;
DATA_TYPE *misaligned = (DATA_TYPE *)data.misaligned;
DATA_TYPE value = DATA_VALUE;
void
block_copy(void *dst, void *src, size_t sz)
{
memcpy(dst, src, sz);
}
int
main()
{
/* Set PSR.ac. */
asm volatile("sum 8");
#if ACCESS == Load
/*
* LOAD
*/
block_copy(misaligned, &value, sizeof(DATA_TYPE));
# if POSTINC == NoPostInc
/* Misaligned load. */
*aligned = *misaligned;
# elif POSTINC == MinConstPostInc
asm volatile(
"ld8 r2=%0;;"
LD " " REG "=[r2],%2;;"
"st8 %0=r2;" ST " %1=" REG ";;"
: "=m"(misaligned), "=m"(*aligned)
: "i"(-sizeof(DATA_TYPE))
: REG, "r2", "memory");
# elif POSTINC == PlusConstPostInc
asm volatile(
"ld8 r2=%0;;"
LD " " REG "=[r2],%2;;"
"st8 %0=r2;" ST " %1=" REG ";;"
: "=m"(misaligned), "=m"(*aligned)
: "i"(sizeof(DATA_TYPE))
: REG, "r2", "memory");
# elif POSTINC == ScratchRegPostInc
asm volatile(
"ld8 r2=%0; mov r3=%2;;"
LD " " REG "=[r2],r3;;"
"st8 %0=r2;" ST " %1=" REG ";;"
: "=m"(misaligned), "=m"(*aligned)
: "i"(sizeof(DATA_TYPE))
: REG, "r2", "r3", "memory");
# elif POSTINC == PreservedRegPostInc
asm volatile(
"ld8 r2=%0; mov r4=%2;;"
LD " " REG "=[r2],r4;;"
"st8 %0=r2;" ST " %1=" REG ";;"
: "=m"(misaligned), "=m"(*aligned)
: "i"(sizeof(DATA_TYPE))
: REG, "r2", "r4", "memory");
# endif
#elif ACCESS == Store
/*
* STORE
*/
# if POSTINC == NoPostInc
/* Misaligned store. */
*misaligned = value;
# elif POSTINC == MinConstPostInc
asm volatile(
"ld8 r2=%0;" LD " " REG "=%1;;"
ST " [r2]=" REG ",%2;;"
"st8 %0=r2;;"
: "=m"(misaligned)
: "m"(value), "i"(-sizeof(DATA_TYPE))
: REG, "r2", "memory");
# elif POSTINC == PlusConstPostInc
asm volatile(
"ld8 r2=%0;" LD " " REG "=%1;;"
ST " [r2]=" REG ",%2;;"
"st8 %0=r2;;"
: "=m"(misaligned)
: "m"(value), "i"(sizeof(DATA_TYPE))
: REG, "r2", "memory");
# elif POSTINC == ScratchRegPostInc || POSTINC == PreservedRegPostInc
return (1);
# endif
block_copy(aligned, data.misaligned, sizeof(DATA_TYPE));
#endif
if (*aligned != value)
return (2);
#if POSTINC == NoPostInc
return (0);
#elif POSTINC == MinConstPostInc
return (((char *)misaligned == data.misaligned - sizeof(DATA_TYPE))
? 0 : 4);
#else
return (((char *)misaligned == data.misaligned + sizeof(DATA_TYPE))
? 0 : 4);
#endif
}
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