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Fixing carry and compare flags.

This commit is contained in:
Ben Vanik 2013-05-24 20:20:18 -07:00
parent 97b0e2aa3d
commit 68f1eb7f69
1 changed files with 8 additions and 7 deletions
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15
src/xenia/cpu/x64/x64_emitter.cc
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@ -1232,6 +1232,7 @@ void X64Emitter::update_xer_with_carry(GpVar& value) {
GpVar xer(c.newGpVar());
c.mov(xer, xer_value());
c.and_(xer, imm(0xDFFFFFFF)); // clear bit 29
c.mov(value.r8(), value.r8());
c.shl(value, imm(29));
c.or_(xer, value);
update_xer_value(xer);
@ -1347,7 +1348,7 @@ void X64Emitter::update_cr_value(uint32_t n, GpVar& value) {
GpVar cr_tmp(c.newGpVar());
c.mov(cr_tmp, qword_ptr(c.getGpArg(0), offsetof(xe_ppc_state_t, cr)));
GpVar cr_n(c.newGpVar());
c.mov(cr_n, value);
c.mov(cr_n, value.r8());
if (n) {
c.shl(cr_n, imm(n * 4));
}
@ -1375,9 +1376,9 @@ void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs) {
GpVar v(c.newGpVar());
c.shl(v_g, imm(1));
c.shl(v_e, imm(2));
c.or_(v, v_l);
c.or_(v, v_g);
c.or_(v, v_e);
c.or_(v.r8(), v_l.r8());
c.or_(v.r8(), v_g.r8());
c.or_(v.r8(), v_e.r8());
// TODO(benvanik): set bit 4 to XER[SO]
// c.seto?
@ -1404,9 +1405,9 @@ void X64Emitter::update_cr_with_cond(uint32_t n, GpVar& lhs, GpVar& rhs) {
GpVar v(c.newGpVar());
c.shl(v_g, imm(1));
c.shl(v_e, imm(2));
c.or_(v, v_l);
c.or_(v, v_g);
c.or_(v, v_e);
c.or_(v.r8(), v_l.r8());
c.or_(v.r8(), v_g.r8());
c.or_(v.r8(), v_e.r8());
// TODO(benvanik): set bit 4 to XER[SO]
// c.seto?