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/*
* (C) Gražvydas "notaz" Ignotas, 2011
*
* This work is licensed under the terms of GNU GPL version 2 or later.
* See the COPYING file in the top-level directory.
*/
static int emit_ldr_type(int type, int offs, int rs, int rt)
{
switch(type) {
case LOADB_STUB:
emit_movsbl_indexed(offs,rs,rt);
break;
case LOADBU_STUB:
emit_movzbl_indexed(offs,rs,rt);
break;
case LOADH_STUB:
emit_movswl_indexed(offs,rs,rt);
break;
case LOADHU_STUB:
emit_movzwl_indexed(offs,rs,rt);
break;
case LOADW_STUB:
emit_readword_indexed(offs,rs,rt);
break;
default:
assert(0);
}
}
static int emit_str_type(int type, int offs, int rs, int rt)
{
switch(type) {
case STOREB_STUB:
emit_writebyte_indexed(rt,offs,rs);
break;
case STOREH_STUB:
emit_writehword_indexed(rt,offs,rs);
break;
case STOREW_STUB:
emit_writeword_indexed(rt,offs,rs);
break;
default:
assert(0);
}
}
static void convert_ram_addr(u_int a_rs, u_int a_rt, int rs, int rt)
{
if(rs<0)
emit_movimm(a_rt,rt);
else if((a_rs&~0x60000000)==a_rt)
emit_andimm(rs,~0x60000000,rt);
else if((a_rs&~0x00600000)==a_rt)
emit_andimm(rs,~0x00600000,rt);
else
emit_movimm(a_rt,rt);
}
static int pcsx_direct_read(int type, u_int addr, int rs, int rt)
{
if((addr & 0x1f800000) == 0) {
assem_debug("pcsx_direct_read %08x ram\n",addr);
if(rt<0)
return 1;
u_int a=(addr&~0x60600000)|0x80000000;
convert_ram_addr(addr,a,rs,rt);
emit_ldr_type(type,0,rt,rt);
return 1;
}
if((addr & 0x1ff80000) == 0x1fc00000) {
assem_debug("pcsx_direct_read %08x bios\n",addr);
if(rt<0)
return 1;
emit_movimm((u_int)&psxR[addr&0x7ffff],rt);
emit_ldr_type(type,0,rt,rt);
return 1;
}
if((addr & 0xfffff000) == 0x1f800000) {
assem_debug("pcsx_direct_read %08x scratchpad\n",addr);
if(rt<0)
return 1;
if(type==LOADW_STUB||type==LOADBU_STUB||(addr&0xf00)==0) {
emit_readword((int)&psxH_ptr,rt);
emit_ldr_type(type,addr&0xfff,rt,rt);
} else {
emit_movimm((u_int)&psxH[addr&0xfff],rt);
emit_ldr_type(type,0,rt,rt);
}
return 1;
}
assem_debug("pcsx_direct_read %08x miss\n",addr);
return 0;
}
static int pcsx_direct_write(int type, u_int addr, int rs, int rt, signed char *regmap)
{
if((addr & 0x1f800000) == 0) {
assem_debug("pcsx_direct_write %08x ram\n",addr);
u_int a=(addr&~0x60600000)|0x80000000;
convert_ram_addr(addr,a,rs,HOST_TEMPREG);
emit_str_type(type,0,HOST_TEMPREG,rt);
int ir=get_reg(regmap,INVCP);
assert(ir>=0);
emit_cmpmem_indexedsr12_reg(ir,HOST_TEMPREG,1);
emit_callne(invalidate_addr_reg[rs]);
return 1;
}
if((addr & 0xfffff000) == 0x1f800000) {
assem_debug("pcsx_direct_write %08x scratchpad\n",addr);
if(type==STOREW_STUB||type==STOREB_STUB||(addr&0xf00)==0) {
emit_readword((int)&psxH_ptr,HOST_TEMPREG);
emit_str_type(type,addr&0xfff,HOST_TEMPREG,rt);
} else {
emit_movimm((u_int)&psxH[addr&0xfff],HOST_TEMPREG);
emit_str_type(type,0,HOST_TEMPREG,rt);
}
return 1;
}
assem_debug("pcsx_direct_write %08x miss\n",addr);
return 0;
}
// vim:shiftwidth=2:expandtab
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