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Fix (i)div bug

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copy 2013-11-26 23:11:23 +01:00
commit f520995582
1 changed files with 8 additions and 6 deletions
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14
src/arith.macro.js
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@ -569,7 +569,7 @@ function div8(source_operand)
var target_operand = reg16[reg_ax],
result = target_operand / source_operand | 0;
if(result > 0xFF || source_operand === 0)
if(result >= 0x100 || source_operand === 0)
{
trigger_de();
}
@ -587,7 +587,7 @@ function idiv8(source_operand)
var target_operand = reg16s[reg_ax],
result = target_operand / source_operand | 0;
if(result > 0x7F || result < -0x80 || source_operand === 0)
if(result >= 0x80 || result <= -0x81 || source_operand === 0)
{
trigger_de();
}
@ -606,7 +606,7 @@ function div16(source_operand)
target_operand = (reg16[reg_ax] | reg16[reg_dx] << 16) >>> 0,
result = target_operand / source_operand | 0;
if(result > 0xFFFF || source_operand === 0)
if(result >= 0x10000 || result < 0 || source_operand === 0)
{
trigger_de();
}
@ -624,7 +624,7 @@ function idiv16(source_operand)
var target_operand = reg16[reg_ax] | (reg16[reg_dx] << 16),
result = target_operand / source_operand | 0;
if(result > 0x7FFF || result < -0x8000 || source_operand === 0)
if(result >= 0x8000 || result <= -0x8001 || source_operand === 0)
{
trigger_de();
}
@ -647,8 +647,9 @@ function div32(source_operand)
mod = (0x100000000 * dest_operand_high % source_operand + dest_operand_low % source_operand) % source_operand,
result = dest_operand_low / source_operand + dest_operand_high * 0x100000000 / source_operand;
if(result > 0xFFFFFFFF || source_operand === 0)
if(result >= 0x100000000 || source_operand === 0)
{
dbg_log("div32 #DE: " + h(dest_operand_high, 8) + ":" + h(dest_operand_low, 8) + " div " + h(source_operand, 8));
trigger_de();
}
else
@ -671,8 +672,9 @@ function idiv32(source_operand)
mod = (0x100000000 * dest_operand_high % source_operand + dest_operand_low % source_operand) % source_operand,
result = dest_operand_low / source_operand + dest_operand_high * 0x100000000 / source_operand;
if(result > 0x7FFFFFFF || result < -0x80000000 || source_operand === 0)
if(result >= 0x80000000 || result <= -0x80000001 || source_operand === 0)
{
dbg_log("div32 #DE: " + h(dest_operand_high, 8) + ":" + h(dest_operand_low, 8) + " div " + h(source_operand, 8));
trigger_de();
}
else