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port stos*

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This commit is contained in:
Awal Garg 2017-07-30 18:58:55 +05:30 committed by Fabian
parent 59f7bc4ec1
commit e35ad8425d
3 changed files with 204 additions and 3 deletions
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3
src/browser/starter.js
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@ -200,9 +200,6 @@ function V86Starter(options)
"_outsb": function() { return cpu.outsb.apply(cpu, arguments); },
"_outsw": function() { return cpu.outsw.apply(cpu, arguments); },
"_outsd": function() { return cpu.outsd.apply(cpu, arguments); },
"_stosb": function() { return cpu.stosb.apply(cpu, arguments); },
"_stosw": function() { return cpu.stosw.apply(cpu, arguments); },
"_stosd": function() { return cpu.stosd.apply(cpu, arguments); },
"_lodsb": function() { return cpu.lodsb.apply(cpu, arguments); },
"_lodsw": function() { return cpu.lodsw.apply(cpu, arguments); },
"_lodsd": function() { return cpu.lodsd.apply(cpu, arguments); },

3
src/cpu.js
View file

@ -353,6 +353,9 @@ CPU.prototype.wasm_patch = function(wm)
this.cmpsb = this.wm.funcs['_cmpsb'];
this.cmpsw = this.wm.funcs['_cmpsw'];
this.cmpsd = this.wm.funcs['_cmpsd'];
this.stosb = this.wm.funcs['_stosb'];
this.stosw = this.wm.funcs['_stosw'];
this.stosd = this.wm.funcs['_stosd'];
};
CPU.prototype.get_state = function()

201
src/native/string.c
View file

@ -486,3 +486,204 @@ void cmpsd()
}
}
void stosb_rep()
{
int32_t data = reg8[AL];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -1 : 1;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
int32_t phys_dest = translate_address_write(dest);
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write8(phys_dest, data);
phys_dest += size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void stosb_no_rep()
{
int32_t data = reg8[AL];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -1 : 1;
safe_write8(dest, data);
add_reg_asize(EDI, size);
diverged();
}
void stosb()
{
if(*prefixes & PREFIX_MASK_REP)
{
stosb_rep();
}
else
{
stosb_no_rep();
}
}
void stosw_rep()
{
int32_t data = reg16[AX];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -2 : 2;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
if(!(dest & 1))
{
int32_t single_size = size < 0 ? -1 : 1;
int32_t phys_dest = translate_address_write(dest) >> 1;
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write_aligned16(phys_dest, data);
phys_dest += single_size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
}
else
{
do
{
safe_write16(dest, data);
dest += size;
add_reg_asize(EDI, size);
cont = decr_ecx_asize() != 0;
}
while(cont && cycle_counter--);
}
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void stosw_no_rep()
{
int32_t data = reg16[AX];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -2 : 2;
safe_write16(dest, data);
add_reg_asize(EDI, size);
diverged();
}
void stosw()
{
if(*prefixes & PREFIX_MASK_REP)
{
stosw_rep();
}
else
{
stosw_no_rep();
}
}
void stosd_rep()
{
int32_t data = reg32s[EAX];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -4 : 4;
int32_t count = get_reg_asize(ECX) >> 0;
if(count == 0) return;
int32_t cont = false;
int32_t start_count = count;
int32_t cycle_counter = MAX_COUNT_PER_CYCLE;
if(!(dest & 3))
{
int32_t single_size = size < 0 ? -1 : 1;
int32_t phys_dest = translate_address_write(dest) >> 2;
if(*paging)
{
cycle_counter = string_get_cycle_count(size, dest);
}
do
{
write_aligned32(phys_dest, data);
phys_dest += single_size;
cont = --count != 0;
}
while(cont && cycle_counter--);
int32_t diff = size * (start_count - count);
add_reg_asize(EDI, diff);
set_ecx_asize(count);
*timestamp_counter += start_count - count;
}
else
{
do
{
safe_write32(dest, data);
dest += size;
add_reg_asize(EDI, size);
cont = decr_ecx_asize() != 0;
}
while(cont && cycle_counter--);
}
if(cont)
{
*instruction_pointer = *previous_ip;
}
diverged();
}
void stosd_no_rep()
{
int32_t data = reg32s[EAX];
int32_t dest = get_seg(ES) + get_reg_asize(EDI);
int32_t size = *flags & FLAG_DIRECTION ? -4 : 4;
safe_write32(dest, data);
add_reg_asize(EDI, size);
diverged();
}
void stosd()
{
if(*prefixes & PREFIX_MASK_REP)
{
stosd_rep();
}
else
{
stosd_no_rep();
}
}