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port fxrstor

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This commit is contained in:
Awal Garg 2017-08-05 02:45:21 +05:30 committed by Fabian
parent d7b81d5bb9
commit 7c8294230d
4 changed files with 42 additions and 3 deletions
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2
src/browser/starter.js
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@ -214,8 +214,6 @@ function V86Starter(options)
"_jcxz": function() { return cpu.jcxz.apply(cpu, arguments); },
"_test_privileges_for_io": function() { return cpu.test_privileges_for_io.apply(cpu, arguments); },
"_fxsave": function() { return cpu.fxsave.apply(cpu, arguments); },
"_fxrstor": function() { return cpu.fxrstor.apply(cpu, arguments); },
};
let wasm_file = DEBUG ? "v86-debug.wasm" : "v86.wasm";

1
src/cpu.js
View file

@ -370,6 +370,7 @@ CPU.prototype.wasm_patch = function(wm)
this.outsd = this.wm.funcs['_outsd'];
this.fxsave = this.wm.funcs['_fxsave'];
this.fxrstor = this.wm.funcs['_fxrstor'];
};
CPU.prototype.get_state = function()

2
src/native/cpu.c
View file

@ -44,7 +44,7 @@ void safe_write16(int32_t, int32_t);
void safe_write32(int32_t, int32_t);
void fxsave(uint32_t);
void fxrstor(int32_t);
void fxrstor(uint32_t);
int32_t do_page_translation(int32_t, bool, bool);

40
src/native/misc_instr.c
View file

@ -290,7 +290,9 @@ void setcc(bool condition) {
}
int32_t fpu_load_status_word();
void fpu_set_status_word(int32_t);
void fpu_store_m80(uint32_t, double_t);
double_t fpu_load_m80(uint32_t);
void fxsave(uint32_t addr)
{
@ -325,3 +327,41 @@ void fxsave(uint32_t addr)
}
}
void fxrstor(uint32_t addr)
{
translate_address_read(addr);
translate_address_read(addr + 511);
int32_t new_mxcsr = safe_read32s(addr + 24);
if(new_mxcsr & ~MXCSR_MASK)
{
//dbg_log("Invalid mxcsr bits: " + h((new_mxcsr & ~MXCSR_MASK) >>> 0, 8));
trigger_gp(0);
}
*fpu_control_word = safe_read16(addr + 0);
fpu_set_status_word(safe_read16(addr + 2));
*fpu_stack_empty = ~safe_read8(addr + 4) & 0xFF;
*fpu_opcode = safe_read16(addr + 6);
*fpu_ip = safe_read32s(addr + 8);
*fpu_ip = safe_read16(addr + 12);
*fpu_dp = safe_read32s(addr + 16);
*fpu_dp_selector = safe_read16(addr + 20);
*mxcsr = new_mxcsr;
for(int32_t i = 0; i < 8; i++)
{
fpu_st[*fpu_stack_ptr + i & 7] = fpu_load_m80(addr + 32 + (i << 4));
}
for(int32_t i = 0; i < 8; i++)
{
reg_xmm32s[i << 2 | 0] = safe_read32s(addr + 160 + (i << 4) + 0);
reg_xmm32s[i << 2 | 1] = safe_read32s(addr + 160 + (i << 4) + 4);
reg_xmm32s[i << 2 | 2] = safe_read32s(addr + 160 + (i << 4) + 8);
reg_xmm32s[i << 2 | 3] = safe_read32s(addr + 160 + (i << 4) + 12);
}
}