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use local for storing {e}sp

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This commit is contained in:
Awal Garg 2018-07-23 13:07:44 +05:30 committed by Fabian
parent b3e415cf9f
commit 8303948954
1 changed files with 8 additions and 8 deletions
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16
src/rust/codegen.rs
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@ -420,12 +420,15 @@ pub fn gen_pop16_ss16(ctx: &mut JitContext) {
.get_fn_idx("safe_read16", module_init::FN1_RET_TYPE_INDEX);
let instruction_body = &mut ctx.builder.instruction_body;
let sp_local = GEN_LOCAL_SCRATCH0;
// sp = segment_offsets[SS] + reg16[SP]
wasm_util::load_aligned_i32(instruction_body, global_pointers::get_seg_offset(regs::SS));
wasm_util::load_aligned_i32(
instruction_body,
global_pointers::get_reg16_offset(regs::SP),
);
wasm_util::tee_local(instruction_body, sp_local);
wasm_util::add_i32(instruction_body);
// result = safe_read16(sp)
@ -437,10 +440,7 @@ pub fn gen_pop16_ss16(ctx: &mut JitContext) {
instruction_body,
global_pointers::get_reg16_offset(regs::SP) as i32,
);
wasm_util::load_aligned_i32(
instruction_body,
global_pointers::get_reg16_offset(regs::SP),
);
wasm_util::get_local(instruction_body, sp_local);
wasm_util::push_i32(instruction_body, 2);
wasm_util::add_i32(instruction_body);
wasm_util::store_aligned_i32(instruction_body);
@ -454,12 +454,15 @@ pub fn gen_pop16_ss32(ctx: &mut JitContext) {
.get_fn_idx("safe_read16", module_init::FN1_RET_TYPE_INDEX);
let instruction_body = &mut ctx.builder.instruction_body;
let esp_local = GEN_LOCAL_SCRATCH0;
// esp = segment_offsets[SS] + reg32s[ESP]
wasm_util::load_aligned_i32(instruction_body, global_pointers::get_seg_offset(regs::SS));
wasm_util::load_aligned_i32(
instruction_body,
global_pointers::get_reg32_offset(regs::ESP),
);
wasm_util::tee_local(instruction_body, esp_local);
wasm_util::add_i32(instruction_body);
// result = safe_read16(esp)
@ -471,10 +474,7 @@ pub fn gen_pop16_ss32(ctx: &mut JitContext) {
instruction_body,
global_pointers::get_reg32_offset(regs::ESP) as i32,
);
wasm_util::load_aligned_i32(
instruction_body,
global_pointers::get_reg32_offset(regs::ESP),
);
wasm_util::get_local(instruction_body, esp_local);
wasm_util::push_i32(instruction_body, 2);
wasm_util::add_i32(instruction_body);
wasm_util::store_aligned_i32(instruction_body);