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code compiles - not tested yet

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Markus Fröschle
2013-11-03 07:07:43 +00:00
parent 3d77413237
commit 8d550a07d7
8 changed files with 335 additions and 516 deletions
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72
include/util.h
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@@ -25,48 +25,54 @@
#ifndef UTIL_H_
#define UTIL_H_
#include <stdint.h>
/*
* WORD swpw(WORD val);
* uint16_t swpw(uint16_t val);
* swap endianess of val, 16 bits only.
*/
#define swpw(a) \
__extension__ \
({long _tmp; \
__asm__ __volatile__ \
("move.w %0,%1\n\t" \
"lsl.l #8,%0\n\t" \
"lsr.l #8,%1\n\t" \
"move.b %1,%0" \
: "=d"(a), "=d"(_tmp) /* outputs */ \
: "0"(a) /* inputs */ \
: "cc" /* clobbered */ \
); \
})
inline uint16_t swpw(uint16_t w)
{
register uint32_t result asm("d0");
__asm__ __volatile__
(
"lea %[input],a0\n\t" \
"mvz.b 3(a0),%[output]\n\t" \
"lsl.l #8,%[output]\n\t" \
"move.b 2(a0),%[output]\n\t" \
: [output] "=d" (result) /* output */
: [input] "o" (w) /* input */
: "cc", "a0", "memory" /* clobbered */
);
return result;
}
/*
* WORD swpl(LONG val);
* uint32_t swpl(uint32_t val);
* swap endianess of val, 32 bits only.
* e.g. ABCD => DCBA
*/
inline uint32_t swpl(uint32_t l)
{
register uint32_t result asm("d0");
#define swpl(a) \
__extension__ \
({long _tmp; \
__asm__ __volatile__ \
("move.b (%1),%0\n\t" \
"move.b 3(%1),(%1)\n\t" \
"move.b %0,3(%1)\n\t" \
"move.b 1(%1),%0\n\t" \
"move.b 2(%1),1(%1)\n\t" \
"move.b %0,2(%1)" \
: "=d"(_tmp) /* outputs */ \
: "a"(&a) /* inputs */ \
: "cc", "memory" /* clobbered */ \
); \
})
__asm__ __volatile__
(
"lea %[input],a0\n\t" \
"mvz.b 3(a0),%[output]\n\t" \
"lsl.l #8,%[output]\n\t" \
"move.b 2(a0),%[output]\n\t" \
"lsl.l #8,%[output]\n\t" \
"move.b 1(a0),%[output]\n\t" \
"lsl.l #8,%[output]\n\t" \
"move.b (a0),%[output]\n\t" \
: [output] "=d" (result) /* output */
: [input] "o" (l) /* input */
: "cc", "a0", "memory" /* clobbered */
);
return result;
}
/*
* WORD swpw2(ULONG val);