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Use MOVW/MOVT to load immediates on ARM instead of a literal pool.

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This commit is contained in:
SarahW 2018-08-02 22:09:57 +01:00
commit a9d46d95ec
3 changed files with 19 additions and 74 deletions
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65
src/codegen_backend_arm_uops.c
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@ -49,8 +49,7 @@ static inline int in_range(void *addr, void *base)
void host_arm_call(codeblock_t *block, void *dst_addr)
{
int offset = add_literal(block, (uintptr_t)dst_addr);
host_arm_LDR_IMM(block, REG_R3, REG_LITERAL, offset);
host_arm_MOV_IMM(block, REG_R3, (uintptr_t)dst_addr);
host_arm_BLX(block, REG_R3);
}
@ -240,54 +239,22 @@ static int codegen_CMP_IMM_JZ(codeblock_t *block, uop_t *uop)
static int codegen_LOAD_FUNC_ARG0_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, REG_ARG0, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, REG_ARG0, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, REG_ARG0, uop->imm_data);
return 0;
}
static int codegen_LOAD_FUNC_ARG1_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, REG_ARG1, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, REG_ARG1, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, REG_ARG1, uop->imm_data);
return 0;
}
static int codegen_LOAD_FUNC_ARG2_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, REG_ARG2, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, REG_ARG2, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, REG_ARG2, uop->imm_data);
return 0;
}
static int codegen_LOAD_FUNC_ARG3_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, REG_ARG3, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, REG_ARG3, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, REG_ARG3, uop->imm_data);
return 0;
}
@ -519,15 +486,7 @@ static int codegen_MOV_IMM(codeblock_t *block, uop_t *uop)
if (REG_IS_L(dest_size))
{
uint32_t arm_imm;
if (get_arm_imm(uop->imm_data, &arm_imm))
host_arm_MOV_IMM(block, dest_reg, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, dest_reg, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, dest_reg, uop->imm_data);
}
else if (REG_IS_W(dest_size))
{
@ -551,8 +510,7 @@ static int codegen_MOV_IMM(codeblock_t *block, uop_t *uop)
}
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);
host_arm_MOV_IMM(block, uop->dest_reg_a_real, (uintptr_t)uop->p);
return 0;
}
@ -650,13 +608,8 @@ static int codegen_STORE_PTR_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, REG_R0, uop->imm_data);
else
{
int offset = add_literal(block, uop->imm_data);
host_arm_LDR_IMM(block, REG_R0, REG_LITERAL, offset);
}
host_arm_MOV_IMM(block, REG_R0, uop->imm_data);
if (in_range(uop->p, &cpu_state))
host_arm_STR_IMM(block, REG_R0, REG_CPUSTATE, (uintptr_t)uop->p - (uintptr_t)&cpu_state);
else