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py: Adjust regs for x86 so that 1 more local can live in a reg.

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This commit is contained in:
Damien George 2014-09-06 23:24:32 +00:00
parent 91fe0d4880
commit 25d904105c
3 changed files with 18 additions and 7 deletions
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4
py/asmx86.c
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@ -413,7 +413,9 @@ void asm_x86_jcc_label(asm_x86_t *as, mp_uint_t jcc_type, mp_uint_t label) {
void asm_x86_entry(asm_x86_t *as, mp_uint_t num_locals) {
asm_x86_push_r32(as, REG_EBP);
asm_x86_mov_r32_to_r32(as, REG_ESP, REG_EBP);
asm_x86_sub_i32_from_r32(as, num_locals * WORD_SIZE, REG_ESP);
if (num_locals > 0) {
asm_x86_sub_i32_from_r32(as, num_locals * WORD_SIZE, REG_ESP);
}
asm_x86_push_r32(as, REG_EBX);
asm_x86_push_r32(as, REG_ESI);
asm_x86_push_r32(as, REG_EDI);

2
py/asmx86.h
View File

@ -53,7 +53,7 @@
#define ASM_X86_CC_JL (0xc) // less, signed
#define REG_RET REG_EAX
#define REG_ARG_1 REG_EBX
#define REG_ARG_1 REG_EAX
#define REG_ARG_2 REG_ECX
#define REG_ARG_3 REG_EDX

19
py/emitnative.c
View File

@ -189,13 +189,16 @@ STATIC byte mp_f_n_args[MP_F_NUMBER_OF] = {
#define EXPORT_FUN(name) emit_native_x86_##name
// caller-save, so can be used as temporaries
#define REG_TEMP0 (REG_EAX)
#define REG_TEMP1 (REG_EBX)
#define REG_TEMP2 (REG_ECX)
#define REG_TEMP1 (REG_ECX)
#define REG_TEMP2 (REG_EDX)
#define REG_LOCAL_1 (REG_ESI)
#define REG_LOCAL_2 (REG_EDI)
#define REG_LOCAL_NUM (2)
// callee-save, so can be used as locals
#define REG_LOCAL_1 (REG_EBX)
#define REG_LOCAL_2 (REG_ESI)
#define REG_LOCAL_3 (REG_EDI)
#define REG_LOCAL_NUM (3)
#define ASM_PASS_COMPUTE ASM_X86_PASS_COMPUTE
#define ASM_PASS_EMIT ASM_X86_PASS_EMIT
@ -528,6 +531,8 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
asm_x86_mov_arg_to_r32(emit->as, i, REG_LOCAL_1);
} else if (i == 1) {
asm_x86_mov_arg_to_r32(emit->as, i, REG_LOCAL_2);
} else if (i == 2) {
asm_x86_mov_arg_to_r32(emit->as, i, REG_LOCAL_3);
} else {
asm_x86_mov_arg_to_r32(emit->as, i, REG_TEMP0);
asm_x86_mov_r32_to_local(emit->as, REG_TEMP0, i - REG_LOCAL_NUM);
@ -1022,6 +1027,8 @@ STATIC void emit_native_load_fast(emit_t *emit, qstr qstr, uint id_flags, int lo
emit_post_push_reg(emit, vtype, REG_LOCAL_1);
} else if (local_num == 1) {
emit_post_push_reg(emit, vtype, REG_LOCAL_2);
} else if (local_num == 2) {
emit_post_push_reg(emit, vtype, REG_LOCAL_3);
} else {
need_reg_single(emit, REG_EAX, 0);
asm_x86_mov_local_to_r32(emit->as, local_num - REG_LOCAL_NUM, REG_EAX);
@ -1125,6 +1132,8 @@ STATIC void emit_native_store_fast(emit_t *emit, qstr qstr, int local_num) {
emit_pre_pop_reg(emit, &vtype, REG_LOCAL_1);
} else if (local_num == 1) {
emit_pre_pop_reg(emit, &vtype, REG_LOCAL_2);
} else if (local_num == 2) {
emit_pre_pop_reg(emit, &vtype, REG_LOCAL_3);
} else {
emit_pre_pop_reg(emit, &vtype, REG_EAX);
asm_x86_mov_r32_to_local(emit->as, REG_EAX, local_num - REG_LOCAL_NUM);