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fix addC for case where bit 15 of constant is set

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This commit is contained in:
Joel Dice 2009-03-08 20:09:06 -06:00
parent 8b0f7d790f
commit 68ed5e6cb5
2 changed files with 15 additions and 11 deletions
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23
src/powerpc.cpp
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@ -150,6 +150,12 @@ isInt16(intptr_t v)
return v == static_cast<int16_t>(v);
}
inline int
carry16(intptr_t v)
{
return static_cast<int16_t>(v) < 0 ? 1 : 0;
}
const unsigned FrameFooterSize = 6;
const int StackRegister = 1;
@ -701,7 +707,7 @@ void addC(Context* con, unsigned size, Const* a, Reg* b, Reg* t) {
if(i) {
issue(con, addi(R(t), R(b), lo16(i)));
if(not isInt16(i))
issue(con, addis(R(t), R(t), hi16(i)));
issue(con, addis(R(t), R(t), hi16(i) + carry16(i)));
} else {
moveCR(con, size, a, size, t);
}
@ -716,17 +722,12 @@ void subR(Context* con, unsigned size, Reg* a, Reg* b, Reg* t) {
}
}
void subC(Context* con, unsigned size, Const* a, Reg* b, Reg* t) {
assert(con, size == BytesPerWord);
void subC(Context* c, unsigned size, Const* a, Reg* b, Reg* t) {
assert(c, size == BytesPerWord);
int64_t i = getVal(a);
if(i) {
issue(con, subi(R(t), R(b), lo16(i)));
if(not isInt16(i))
issue(con, subis(R(t), R(t), hi16(i)));
} else {
moveCR(con, size, a, size, t);
}
ResolvedPromise promise(- a->value->value());
Assembler::Constant constant(&promise);
addC(c, size, &constant, b, t);
}
void multiplyR(Context* con, unsigned size, Reg* a, Reg* b, Reg* t) {

3
test/Integers.java
View File

@ -81,5 +81,8 @@ public class Integers {
/ scanlinePad * scanlinePad;
expect(bytesPerLine == 24);
}
int y = -11760768;
expect((y + 0x8000) == (-11760768 + 0x8000));
}
}