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More precise stats for 32-bit addresses

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This commit is contained in:
Fabian 2020-12-31 19:14:29 -06:00
parent 8f19c1d1dc
commit 14fd138357
3 changed files with 42 additions and 14 deletions
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1
src/browser/print_stats.js
View file

@ -69,6 +69,7 @@ const print_stats = {
"TLB_GLOBAL_FULL",
"MODRM_SIMPLE_REG",
"MODRM_SIMPLE_REG_WITH_OFFSET",
"MODRM_SIMPLE_CONST_OFFSET",
"MODRM_COMPLEX",
];

54
src/rust/modrm.rs
View file

@ -188,7 +188,9 @@ enum Offset {
fn gen32_case(ctx: &mut JitContext, seg: u32, offset: Offset, imm: Imm32) {
match offset {
Offset::Sib => {
gen_sib(ctx, imm != Imm32::None);
let sib_byte = ctx.cpu.read_imm8();
gen_sib(ctx, sib_byte, imm == Imm32::None);
let immediate_value = match imm {
Imm32::None => 0,
@ -201,7 +203,24 @@ fn gen32_case(ctx: &mut JitContext, seg: u32, offset: Offset, imm: Imm32) {
ctx.builder.instruction_body.add_i32();
}
profiler::stat_increment(profiler::stat::MODRM_COMPLEX);
{
let m = sib_byte >> 3 & 7;
codegen::gen_profiler_stat_increment(
ctx.builder,
if m == 4 {
if immediate_value == 0 {
profiler::stat::MODRM_SIMPLE_REG
}
else {
profiler::stat::MODRM_SIMPLE_REG_WITH_OFFSET
}
}
else {
profiler::stat::MODRM_COMPLEX
},
);
}
},
Offset::Reg(r) => {
let immediate_value = match imm {
@ -213,15 +232,23 @@ fn gen32_case(ctx: &mut JitContext, seg: u32, offset: Offset, imm: Imm32) {
if immediate_value != 0 {
ctx.builder.instruction_body.const_i32(immediate_value);
ctx.builder.instruction_body.add_i32();
profiler::stat_increment(profiler::stat::MODRM_SIMPLE_REG_WITH_OFFSET);
}
else {
profiler::stat_increment(profiler::stat::MODRM_SIMPLE_REG);
}
codegen::gen_profiler_stat_increment(
ctx.builder,
if immediate_value == 0 {
profiler::stat::MODRM_SIMPLE_REG
}
else {
profiler::stat::MODRM_SIMPLE_REG_WITH_OFFSET
},
);
jit_add_seg_offset(ctx, seg);
},
Offset::None => {
profiler::stat_increment(profiler::stat::MODRM_SIMPLE_REG);
codegen::gen_profiler_stat_increment(
ctx.builder,
profiler::stat::MODRM_SIMPLE_CONST_OFFSET,
);
let immediate_value = match imm {
Imm32::None => 0,
Imm32::Imm8 => ctx.cpu.read_imm8s() as i32,
@ -266,8 +293,7 @@ fn gen32(ctx: &mut JitContext, modrm_byte: u8) {
}
}
fn gen_sib(ctx: &mut JitContext, mod_is_nonzero: bool) {
let sib_byte = ctx.cpu.read_imm8();
fn gen_sib(ctx: &mut JitContext, sib_byte: u8, mod_is_zero: bool) {
let r = sib_byte & 7;
let m = sib_byte >> 3 & 7;
@ -281,15 +307,15 @@ fn gen_sib(ctx: &mut JitContext, mod_is_nonzero: bool) {
codegen::gen_get_reg32(ctx, ESP);
}
else if r == 5 {
if mod_is_nonzero {
seg = SS;
codegen::gen_get_reg32(ctx, EBP);
}
else {
if mod_is_zero {
seg = DS;
let base = ctx.cpu.read_imm32();
ctx.builder.instruction_body.const_i32(base as i32);
}
else {
seg = SS;
codegen::gen_get_reg32(ctx, EBP);
}
}
else {
seg = DS;

1
src/rust/profiler.rs
View file

@ -67,6 +67,7 @@ pub enum stat {
MODRM_SIMPLE_REG,
MODRM_SIMPLE_REG_WITH_OFFSET,
MODRM_SIMPLE_CONST_OFFSET,
MODRM_COMPLEX,
}