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fixed #1491

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Charlie Barto
2014-08-19 18:30:12 -04:00
parent 7ef076a04a
commit 5b326269c3
1 changed files with 17 additions and 11 deletions
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28
lib/system/arithm.nim
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@@ -114,63 +114,69 @@ when asmVersion and not defined(gcc) and not defined(llvm_gcc):
proc addInt(a, b: int): int {.compilerProc, asmNoStackFrame.} =
# a in eax, and b in edx
asm """
mov eax, `a`
add eax, `b`
mov eax, ecx
add eax, edx
jno theEnd
call `raiseOverflow`
theEnd:
ret
"""
proc subInt(a, b: int): int {.compilerProc, asmNoStackFrame.} =
asm """
mov eax, `a`
sub eax, `b`
mov eax, ecx
sub eax, edx
jno theEnd
call `raiseOverflow`
theEnd:
ret
"""
proc negInt(a: int): int {.compilerProc, asmNoStackFrame.} =
asm """
mov eax, `a`
mov eax, ecx
neg eax
jno theEnd
call `raiseOverflow`
theEnd:
ret
"""
proc divInt(a, b: int): int {.compilerProc, asmNoStackFrame.} =
asm """
mov eax, `a`
mov ecx, `b`
mov eax, ecx
mov ecx, edx
xor edx, edx
idiv ecx
jno theEnd
call `raiseOverflow`
theEnd:
ret
"""
proc modInt(a, b: int): int {.compilerProc, asmNoStackFrame.} =
asm """
mov eax, `a`
mov ecx, `b`
mov eax, ecx
mov ecx, edx
xor edx, edx
idiv ecx
jno theEnd
call `raiseOverflow`
theEnd:
mov eax, edx
ret
"""
proc mulInt(a, b: int): int {.compilerProc, asmNoStackFrame.} =
asm """
mov eax, `a`
mov ecx, `b`
mov eax, ecx
mov ecx, edx
xor edx, edx
imul ecx
jno theEnd
call `raiseOverflow`
theEnd:
ret
"""
elif false: # asmVersion and (defined(gcc) or defined(llvm_gcc)):