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port idiv16

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This commit is contained in:
Awal Garg 2017-07-28 23:19:11 +05:30 committed by Fabian
parent f9d99ac4de
commit 8cc574af22
4 changed files with 24 additions and 2 deletions
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1
src/browser/starter.js
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@ -194,7 +194,6 @@ function V86Starter(options)
"_load_ldt": function() { return cpu.load_ldt.apply(cpu, arguments); },
"_load_tr": function() { return cpu.load_tr.apply(cpu, arguments); },
"_idiv16": function() { return cpu.idiv16.apply(cpu, arguments); },
"_insb": function() { return cpu.insb.apply(cpu, arguments); },
"_insw": function() { return cpu.insw.apply(cpu, arguments); },
"_insd": function() { return cpu.insd.apply(cpu, arguments); },

1
src/cpu.js
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@ -280,6 +280,7 @@ CPU.prototype.wasm_patch = function(wm)
this.trigger_gp = this.wm.funcs['_trigger_gp'];
this.div32 = this.wm.funcs['_div32'];
this.idiv32 = this.wm.funcs['_idiv32'];
this.idiv16 = this.wm.funcs['_idiv16'];
this.shl8 = this.wm.funcs['_shl8'];
this.shl16 = this.wm.funcs['_shl16'];

22
src/native/arith.c
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@ -815,6 +815,28 @@ void div16(uint32_t source_operand)
}
}
void idiv16(int32_t source_operand)
{
if(source_operand == 0)
{
trigger_de();
return;
}
int32_t target_operand = reg16[AX] | (reg16[DX] << 16);
int32_t result = target_operand / source_operand;
if(result >= 0x8000 || result <= -0x8001)
{
trigger_de();
}
else
{
reg16[AX] = result;
reg16[DX] = target_operand % source_operand;
}
}
void div32(uint32_t source_operand)
{
if(source_operand == 0)

2
src/native/instructions.c
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@ -182,7 +182,7 @@ int32_t rol32(int32_t, int32_t);
int32_t rcr32(int32_t, int32_t);
int32_t rcl32(int32_t, int32_t);
int32_t idiv16(int32_t);
void idiv16(int32_t);
void div32(uint32_t);
void idiv32(int32_t);