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32x: split sh2 code, compiler stub

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@810 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-10-08 19:47:31 +00:00
parent 1d29444dfc
commit 4139770121
16 changed files with 227 additions and 205 deletions
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98
cpu/sh2/mame/sh2pico.c Normal file
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#include "../sh2.h"
// MAME types
typedef signed char INT8;
typedef signed short INT16;
typedef signed int INT32;
typedef unsigned int UINT32;
typedef unsigned short UINT16;
typedef unsigned char UINT8;
#define RB(a) p32x_sh2_read8(a,sh2->is_slave)
#define RW(a) p32x_sh2_read16(a,sh2->is_slave)
#define RL(a) p32x_sh2_read32(a,sh2->is_slave)
#define WB(a,d) p32x_sh2_write8(a,d,sh2->is_slave)
#define WW(a,d) p32x_sh2_write16(a,d,sh2->is_slave)
#define WL(a,d) p32x_sh2_write32(a,d,sh2->is_slave)
// some stuff from sh2comn.h
#define T 0x00000001
#define S 0x00000002
#define I 0x000000f0
#define Q 0x00000100
#define M 0x00000200
#define AM 0xc7ffffff
#define FLAGS (M|Q|I|S|T)
#define Rn ((opcode>>8)&15)
#define Rm ((opcode>>4)&15)
#define sh2_icount sh2->icount
#include "sh2.c"
void sh2_execute(SH2 *sh2_, int cycles)
{
sh2 = sh2_;
sh2->cycles_aim += cycles;
sh2->icount = cycles = sh2->cycles_aim - sh2->cycles_done;
if (sh2->icount <= 0)
return;
do
{
UINT32 opcode;
if (sh2->delay)
{
sh2->ppc = sh2->delay;
opcode = RW(sh2->delay);
sh2->pc -= 2;
}
else
{
sh2->ppc = sh2->pc;
opcode = RW(sh2->pc);
}
sh2->delay = 0;
sh2->pc += 2;
switch (opcode & ( 15 << 12))
{
case 0<<12: op0000(opcode); break;
case 1<<12: op0001(opcode); break;
case 2<<12: op0010(opcode); break;
case 3<<12: op0011(opcode); break;
case 4<<12: op0100(opcode); break;
case 5<<12: op0101(opcode); break;
case 6<<12: op0110(opcode); break;
case 7<<12: op0111(opcode); break;
case 8<<12: op1000(opcode); break;
case 9<<12: op1001(opcode); break;
case 10<<12: op1010(opcode); break;
case 11<<12: op1011(opcode); break;
case 12<<12: op1100(opcode); break;
case 13<<12: op1101(opcode); break;
case 14<<12: op1110(opcode); break;
default: op1111(opcode); break;
}
if (sh2->test_irq && !sh2->delay)
{
if (sh2->pending_irl > sh2->pending_int_irq)
sh2_irl_irq(sh2, sh2->pending_irl);
else
sh2_internal_irq(sh2, sh2->pending_int_irq, sh2->pending_int_vector);
sh2->test_irq = 0;
}
sh2->icount--;
}
while (sh2->icount > 0 || sh2->delay); /* can't interrupt before delay */
sh2->cycles_done += cycles - sh2->icount;
}