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add big endian platform support

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This commit is contained in:
kub 2021-02-22 22:25:03 +01:00
parent b053cb2044
commit 57c5a5e505
21 changed files with 224 additions and 178 deletions
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13
pico/cart.c
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@ -184,6 +184,9 @@ zip_failed:
if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))
goto cso_failed;
cso->header.block_size = CPU_LE4(cso->header.block_size);
cso->header.total_bytes = CPU_LE4(cso->header.total_bytes);
cso->header.total_bytes_high = CPU_LE4(cso->header.total_bytes_high);
if (strncmp(cso->header.magic, "CISO", 4) != 0) {
elprintf(EL_STATUS, "cso: bad header");
@ -453,6 +456,7 @@ int pm_close(pm_file *fp)
// byteswap, data needs to be int aligned, src can match dst
void Byteswap(void *dst, const void *src, int len)
{
#if CPU_IS_LE
const unsigned int *ps = src;
unsigned int *pd = dst;
int i, m;
@ -465,14 +469,15 @@ void Byteswap(void *dst, const void *src, int len)
unsigned int t = ps[i];
pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);
}
#endif
}
// Interleve a 16k block and byteswap
static int InterleveBlock(unsigned char *dest,unsigned char *src)
{
int i=0;
for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd
for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even
for (i=0;i<0x2000;i++) dest[(i<<1)+MEM_BE2(1)]=src[ i]; // Odd
for (i=0;i<0x2000;i++) dest[(i<<1)+MEM_BE2(0)]=src[0x2000+i]; // Even
return 0;
}
@ -615,7 +620,7 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
// This will hang the emu, but will prevent nasty crashes.
// note: 4 bytes are padded to every ROM
if (rom != NULL)
*(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
*(unsigned long *)(rom+romsize) = CPU_BE2(0x4EFAFFFE);
Pico.rom=rom;
Pico.romsize=romsize;
@ -714,7 +719,7 @@ static int rom_strcmp(int rom_offset, const char *s1)
if (rom_offset + len > Pico.romsize)
return 0;
for (i = 0; i < len; i++)
if (s1[i] != s_rom[(i + rom_offset) ^ 1])
if (s1[i] != s_rom[MEM_BE2(i + rom_offset)])
return 1;
return 0;
}