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Fixing condition updates for unsigned compares.

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This commit is contained in:
Ben Vanik
2013-05-26 04:21:07 -07:00
parent 5d83465ce4
commit 9d63eb7499
3 changed files with 25 additions and 12 deletions
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23
src/xenia/cpu/x64/x64_emitter.cc
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@@ -1393,7 +1393,7 @@ void X64Emitter::update_cr_value(uint32_t n, GpVar& value) {
}
}
void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs) {
void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs, bool is_signed) {
X86Compiler& c = compiler_;
// bit0 = RA < 0
// bit1 = RA > 0
@@ -1405,8 +1405,13 @@ void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs) {
GpVar v_g(c.newGpVar());
GpVar v_e(c.newGpVar());
c.cmp(lhs, imm(0));
c.setl(v_l.r8());
c.setg(v_g.r8());
if (is_signed) {
c.setl(v_l.r8());
c.setg(v_g.r8());
} else {
c.setb(v_l.r8());
c.seta(v_g.r8());
}
c.sete(v_e.r8());
GpVar v(c.newGpVar());
c.shl(v_g, imm(1));
@@ -1422,7 +1427,8 @@ void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs) {
update_cr_value(n, v);
}
void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs, GpVar& rhs) {
void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs, GpVar& rhs,
bool is_signed) {
X86Compiler& c = compiler_;
// bit0 = RA < RB
// bit1 = RA > RB
@@ -1434,8 +1440,13 @@ void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs, GpVar& rhs) {
GpVar v_g(c.newGpVar());
GpVar v_e(c.newGpVar());
c.cmp(lhs, rhs);
c.setl(v_l.r8());
c.setg(v_g.r8());
if (is_signed) {
c.setl(v_l.r8());
c.setg(v_g.r8());
} else {
c.setb(v_l.r8());
c.seta(v_g.r8());
}
c.sete(v_e.r8());
GpVar v(c.newGpVar());
c.shl(v_g, imm(1));