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Implemented basic register allocation.

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Mainly handles 'virtual' registers at the moment (eg current and last PC values, segment override status, etc).
This commit is contained in:
SarahW 2018-06-23 19:04:36 +01:00
commit ee3f9210dc
23 changed files with 776 additions and 76 deletions
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51
src/codegen_backend_arm_uops.c
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@ -269,6 +269,28 @@ static int codegen_LOAD_FUNC_ARG3_IMM(codeblock_t *block, uop_t *uop)
return 0;
}
static int codegen_MOV_IMM(codeblock_t *block, uop_t *uop)
{
uint32_t arm_imm;
if (get_arm_imm(uop->imm_data, &arm_imm))
host_arm_MOV_IMM(block, uop->dest_reg_a_real, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, uop->dest_reg_a_real, REG_LITERAL, offset);
}
return 0;
}
static int codegen_MOV_PTR(codeblock_t *block, uop_t *uop)
{
int offset = add_literal(block, (uintptr_t)uop->p);
host_arm_LDR_IMM(block, uop->dest_reg_a_real, REG_LITERAL, offset);
return 0;
}
static int codegen_STORE_PTR_IMM(codeblock_t *block, uop_t *uop)
{
uint32_t arm_imm;
@ -308,7 +330,34 @@ const uOpFn uop_handlers[UOP_MAX] =
[UOP_LOAD_FUNC_ARG_3_IMM & UOP_MASK] = codegen_LOAD_FUNC_ARG3_IMM,
[UOP_STORE_P_IMM & UOP_MASK] = codegen_STORE_PTR_IMM,
[UOP_STORE_P_IMM_8 & UOP_MASK] = codegen_STORE_PTR_IMM_8
[UOP_STORE_P_IMM_8 & UOP_MASK] = codegen_STORE_PTR_IMM_8,
[UOP_MOV_PTR & UOP_MASK] = codegen_MOV_PTR,
[UOP_MOV_IMM & UOP_MASK] = codegen_MOV_IMM
};
void codegen_direct_write_8(codeblock_t *block, void *p, int host_reg)
{
if (in_range(p, &cpu_state))
host_arm_STRB_IMM(block, host_reg, REG_CPUSTATE, (uintptr_t)p - (uintptr_t)&cpu_state);
else
fatal("codegen_direct_write_8 - not in range\n");
}
void codegen_direct_write_32(codeblock_t *block, void *p, int host_reg)
{
if (in_range(p, &cpu_state))
host_arm_STR_IMM(block, host_reg, REG_CPUSTATE, (uintptr_t)p - (uintptr_t)&cpu_state);
else
fatal("codegen_direct_write_32 - not in range\n");
}
void codegen_direct_write_ptr(codeblock_t *block, void *p, int host_reg)
{
if (in_range(p, &cpu_state))
host_arm_STR_IMM(block, host_reg, REG_CPUSTATE, (uintptr_t)p - (uintptr_t)&cpu_state);
else
fatal("codegen_direct_write_ptr - not in range\n");
}
#endif