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Optimise clear_tlb

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Fabian 2017-07-08 13:55:14 -05:00
parent c46a6f310a
commit 593ce966d0
2 changed files with 11 additions and 4 deletions
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6
src/browser/starter.js
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@ -95,6 +95,7 @@ function V86Starter(options)
var emulator;
var cpu;
var mem;
var mem8;
var wasm_shared_funcs = {
"_throw_cpu_exception": () => { throw MAGIC_CPU_EXCEPTION; },
"_hlt_op": function() { return cpu.hlt_op(); },
@ -108,6 +109,10 @@ function V86Starter(options)
"_get_rand_int": function() { return v86util.get_rand_int(); },
"_has_rand_int": function() { return v86util.has_rand_int(); },
"_printf": function(offset) { dbg_log_wasm(mem, offset, [].slice.call(arguments, 1)); },
"_memcpy_large": function(dest, source, length) {
mem8.set(mem8.subarray(source, source + length), dest);
return dest;
},
"_call_interrupt_vector": function(interrupt_nr, is_software_int, has_error_code, error_code) {
cpu.call_interrupt_vector(interrupt_nr, is_software_int, !!has_error_code, error_code);
@ -274,6 +279,7 @@ function V86Starter(options)
emulator = this.v86 = new v86(this.emulator_bus, wm);
cpu = emulator.cpu;
mem = wm.mem.buffer;
mem8 = new Uint8Array(mem);
this.bus.register("emulator-stopped", function()
{

9
src/native/cpu.c
View file

@ -11,6 +11,10 @@ int32_t read_e8_partial_branch() {
return reg8[*modrm_byte << 2 & 0xC | *modrm_byte >> 2 & 1];
}
// like memcpy, but only efficient for large (approximately 10k) sizes
// See memcpy in https://github.com/kripken/emscripten/blob/master/src/library.js
void* memcpy_large(void* dest, const void* src, size_t n);
void writable_or_pagefault(int32_t, int32_t);
int32_t translate_address_read(int32_t);
int32_t translate_address_write(int32_t);
@ -687,10 +691,7 @@ void write_xmm128s(int32_t d0, int32_t d1, int32_t d2, int32_t d3)
void clear_tlb()
{
for(int32_t i = 0; i < 0x100000; i += 4)
{
*(int32_t*)(tlb_info + i) = *(int32_t*)(tlb_info_global + i);
}
memcpy_large(tlb_info, tlb_info_global, 0x100000);
}
void task_switch_test_mmx()