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Fixing condition updates for unsigned compares.

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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8
src/xenia/cpu/x64/x64_emit_alu.cc
View File

@ -214,7 +214,7 @@ XEEMITTER(divwx, 0x7C0003D6, XO )(X64Emitter& e, X86Compiler& c, InstrDat
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, dividend);
e.update_cr_with_cond(0, dividend, true);
}
#if 0
@ -272,7 +272,7 @@ XEEMITTER(divwux, 0x7C000396, XO )(X64Emitter& e, X86Compiler& c, InstrDat
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, dividend);
e.update_cr_with_cond(0, dividend, false);
}
c.unuse(dividend_hi);
@ -581,7 +581,7 @@ XEEMITTER(cmpl, 0x7C000040, X )(X64Emitter& e, X86Compiler& c, InstrDat
c.mov(rhs.r32(), rhs.r32());
}
e.update_cr_with_cond(BF, lhs, rhs);
e.update_cr_with_cond(BF, lhs, rhs, false);
return 0;
}
@ -609,7 +609,7 @@ XEEMITTER(cmpli, 0x28000000, D )(X64Emitter& e, X86Compiler& c, InstrDat
c.mov(lhs.r32(), lhs.r32());
}
e.update_cr_with_cond(BF, lhs, e.get_uint64(i.D.DS));
e.update_cr_with_cond(BF, lhs, e.get_uint64(i.D.DS), false);
return 0;
}

23
src/xenia/cpu/x64/x64_emitter.cc
View File

@ -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));

6
src/xenia/cpu/x64/x64_emitter.h
View File

@ -73,8 +73,10 @@ public:
AsmJit::GpVar cr_value(uint32_t n);
void update_cr_value(uint32_t n, AsmJit::GpVar& value);
void update_cr_with_cond(uint32_t n, AsmJit::GpVar& lhs);
void update_cr_with_cond(uint32_t n, AsmJit::GpVar& lhs, AsmJit::GpVar& rhs);
void update_cr_with_cond(uint32_t n, AsmJit::GpVar& lhs,
bool is_signed = true);
void update_cr_with_cond(uint32_t n, AsmJit::GpVar& lhs, AsmJit::GpVar& rhs,
bool is_signed = true);
AsmJit::GpVar gpr_value(uint32_t n);
void update_gpr_value(uint32_t n, AsmJit::GpVar& value);