Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added recompiled versions of INC and DEC.

Browse source
This commit is contained in:
SarahW 2018-09-12 20:16:27 +01:00
commit 8a19e56340
8 changed files with 298 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

127
src/codegen_ops_arith.c
View file

@ -1330,3 +1330,130 @@ uint32_t rop83_l(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fet
codegen_flags_changed = 1;
return op_pc + 2;
}
static void rebuild_c(ir_data_t *ir)
{
int needs_rebuild = 1;
if (codegen_flags_changed)
{
switch (cpu_state.flags_op)
{
case FLAGS_INC8: case FLAGS_INC16: case FLAGS_INC32:
case FLAGS_DEC8: case FLAGS_DEC16: case FLAGS_DEC32:
needs_rebuild = 0;
break;
}
}
if (needs_rebuild)
{
uop_CALL_FUNC(ir, flags_rebuild_c);
}
}
uint32_t ropINC_r16(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
rebuild_c(ir);
uop_MOVZX(ir, IREG_flags_op1, IREG_16(opcode & 7));
uop_ADD_IMM(ir, IREG_16(opcode & 7), IREG_16(opcode & 7), 1);
uop_MOVZX(ir, IREG_flags_res, IREG_16(opcode & 7));
uop_MOV_IMM(ir, IREG_flags_op2, 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_INC16);
codegen_flags_changed = 1;
return op_pc;
}
uint32_t ropINC_r32(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
rebuild_c(ir);
uop_MOV(ir, IREG_flags_op1, IREG_32(opcode & 7));
uop_ADD_IMM(ir, IREG_32(opcode & 7), IREG_32(opcode & 7), 1);
uop_MOV(ir, IREG_flags_res, IREG_32(opcode & 7));
uop_MOV_IMM(ir, IREG_flags_op2, 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_INC32);
codegen_flags_changed = 1;
return op_pc;
}
uint32_t ropDEC_r16(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
rebuild_c(ir);
uop_MOVZX(ir, IREG_flags_op1, IREG_16(opcode & 7));
uop_SUB_IMM(ir, IREG_16(opcode & 7), IREG_16(opcode & 7), 1);
uop_MOVZX(ir, IREG_flags_res, IREG_16(opcode & 7));
uop_MOV_IMM(ir, IREG_flags_op2, 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_DEC16);
codegen_flags_changed = 1;
return op_pc;
}
uint32_t ropDEC_r32(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
rebuild_c(ir);
uop_MOV(ir, IREG_flags_op1, IREG_32(opcode & 7));
uop_SUB_IMM(ir, IREG_32(opcode & 7), IREG_32(opcode & 7), 1);
uop_MOV(ir, IREG_flags_res, IREG_32(opcode & 7));
uop_MOV_IMM(ir, IREG_flags_op2, 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_DEC32);
codegen_flags_changed = 1;
return op_pc;
}
uint32_t ropINCDEC(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
if ((fetchdat & 0xc0) == 0xc0)
{
uop_MOVZX(ir, IREG_flags_op1, IREG_8(fetchdat & 7));
if (fetchdat & 0x38)
{
uop_SUB_IMM(ir, IREG_8(fetchdat & 7), IREG_8(fetchdat & 7), 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_DEC8);
}
else
{
uop_ADD_IMM(ir, IREG_8(fetchdat & 7), IREG_8(fetchdat & 7), 1);
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_INC8);
}
uop_MOVZX(ir, IREG_flags_res, IREG_8(fetchdat & 7));
uop_MOV_IMM(ir, IREG_flags_op2, 1);
}
else
{
x86seg *target_seg;
uop_MOV_IMM(ir, IREG_oldpc, cpu_state.oldpc);
target_seg = codegen_generate_ea(ir, op_ea_seg, fetchdat, op_ssegs, &op_pc, op_32, 0);
codegen_check_seg_write(block, ir, target_seg);
uop_MEM_LOAD_REG(ir, IREG_temp0_B, ireg_seg_base(target_seg), IREG_eaaddr);
if (fetchdat & 0x38)
{
uop_SUB_IMM(ir, IREG_temp1_B, IREG_temp0_B, 1);
}
else
{
uop_ADD_IMM(ir, IREG_temp1_B, IREG_temp0_B, 1);
}
uop_MEM_STORE_REG(ir, ireg_seg_base(target_seg), IREG_eaaddr, IREG_temp1_B);
uop_MOVZX(ir, IREG_flags_op1, IREG_temp0_B);
uop_MOVZX(ir, IREG_flags_res, IREG_temp1_B);
uop_MOV_IMM(ir, IREG_flags_op2, 1);
if (fetchdat & 0x38)
{
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_DEC8);
}
else
{
uop_MOV_IMM(ir, IREG_flags_op, FLAGS_INC8);
}
}
return op_pc+1;
}