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Hacky ALU ops. Need overflow checks.

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This commit is contained in:
Ben Vanik 2013-05-22 21:14:16 -07:00
parent 9ed911cdad
commit 5cb8cf2630
1 changed files with 66 additions and 65 deletions
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131
src/xenia/cpu/libjit/libjit_emit_alu.cc
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@ -82,18 +82,18 @@ XEEMITTER(addi, 0x38000000, D )(LibjitEmitter& e, jit_function_t f, Ins
return 0;
}
// XEEMITTER(addic, 0x30000000, D )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// // RT <- (RA) + EXTS(SI)
XEEMITTER(addic, 0x30000000, D )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// RT <- (RA) + EXTS(SI)
// Function* sadd_with_overflow = Intrinsic::getDeclaration(
// e.gen_module(), Intrinsic::sadd_with_overflow, jit_type_nint);
// jit_value_t v = b.CreateCall2(sadd_with_overflow,
// e.gpr_value(i.D.RA), e.get_int64(XEEXTS16(i.D.DS)));
// e.update_gpr_value(i.D.RT, b.CreateExtractValue(v, 0));
// e.update_xer_with_carry(b.CreateExtractValue(v, 1));
// TODO(benvanik): track exception
jit_value_t v = jit_insn_add_ovf(f, e.make_signed(e.gpr_value(i.D.RA)),
e.get_int64(XEEXTS16(i.D.DS)));
// return 0;
// }
e.update_gpr_value(i.D.RT, v);
// e.update_xer_with_carry(b.CreateExtractValue(v, 1));
return 0;
}
XEEMITTER(addicx, 0x34000000, D )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
@ -362,40 +362,41 @@ XEEMITTER(mullwx, 0x7C0001D6, XO )(LibjitEmitter& e, jit_function_t f, Ins
// }
// }
// XEEMITTER(subfx, 0x7C000050, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// // RT <- ¬(RA) + (RB) + 1
XEEMITTER(subfx, 0x7C000050, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// RT <- ¬(RA) + (RB) + 1
// if (i.XO.OE) {
// // With XER update.
// // This is a different codepath as we need to use llvm.ssub.with.overflow.
if (i.XO.OE) {
// With XER update.
// This is a different codepath as we need to use llvm.ssub.with.overflow.
// Function* ssub_with_overflow = Intrinsic::getDeclaration(
// e.gen_module(), Intrinsic::ssub_with_overflow, jit_type_nint);
// jit_value_t v = b.CreateCall2(ssub_with_overflow,
// e.gpr_value(i.XO.RB), e.gpr_value(i.XO.RA));
// jit_value_t v0 = b.CreateExtractValue(v, 0);
// e.update_gpr_value(i.XO.RT, v0);
// e.update_xer_with_overflow(b.CreateExtractValue(v, 1));
// TODO(benvanik): handle overflow exceptions.
jit_value_t v = jit_insn_sub_ovf(f,
e.make_signed(e.gpr_value(i.XO.RB)),
e.make_signed(e.gpr_value(i.XO.RA)));
e.update_gpr_value(i.XO.RT, v);
//e.update_xer_with_overflow(b.CreateExtractValue(v, 1));
// if (i.XO.Rc) {
// // With cr0 update.
// e.update_cr_with_cond(0, v0, e.get_int64(0), true);
// }
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v, e.get_int64(0), true);
}
// return 0;
// } else {
// // No OE bit setting.
// jit_value_t v = b.CreateSub(e.gpr_value(i.XO.RB), e.gpr_value(i.XO.RA));
// e.update_gpr_value(i.XO.RT, v);
return 0;
} else {
// No OE bit setting.
jit_value_t v = jit_insn_sub(f,
e.make_signed(e.gpr_value(i.XO.RB)),
e.make_signed(e.gpr_value(i.XO.RA)));
e.update_gpr_value(i.XO.RT, v);
// if (i.XO.Rc) {
// // With cr0 update.
// e.update_cr_with_cond(0, v, e.get_int64(0), true);
// }
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v, e.get_int64(0), true);
}
// return 0;
// }
// }
return 0;
}
}
XEEMITTER(subfcx, 0x7C000010, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
@ -415,35 +416,35 @@ XEEMITTER(subfcx, 0x7C000010, XO )(LibjitEmitter& e, jit_function_t f, Ins
// return 0;
// }
// XEEMITTER(subfex, 0x7C000110, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// // RT <- ¬(RA) + (RB) + CA
XEEMITTER(subfex, 0x7C000110, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
// RT <- ¬(RA) + (RB) + CA
// // TODO(benvanik): possible that the add of rb+ca needs to also check for
// // overflow!
// TODO(benvanik): possible that the add of rb+ca needs to also check for
// overflow!
// jit_value_t ca = jit_insn_and(f, jit_insn_ushr(f, e.xer_value(), 29), 0x1);
// Function* uadd_with_overflow = Intrinsic::getDeclaration(
// e.gen_module(), Intrinsic::uadd_with_overflow, jit_type_nint);
// jit_value_t v = b.CreateCall2(uadd_with_overflow,
// b.CreateNeg(e.gpr_value(i.XO.RA)),
// b.CreateAdd(e.gpr_value(i.XO.RB), ca));
// jit_value_t v0 = b.CreateExtractValue(v, 0);
// e.update_gpr_value(i.XO.RT, v0);
// TODO(benvanik): handle overflow exception
jit_value_t ca = jit_insn_and(f, jit_insn_ushr(f, e.xer_value(),
e.get_uint32(29)),
e.get_uint64(0x1));
jit_value_t v = jit_insn_add_ovf(f,
e.make_unsigned(jit_insn_neg(f, e.gpr_value(i.XO.RA))),
e.make_unsigned(jit_insn_add(f, e.gpr_value(i.XO.RB), ca)));
e.update_gpr_value(i.XO.RT, v);
// if (i.XO.OE) {
// // With XER update.
// e.update_xer_with_overflow_and_carry(b.CreateExtractValue(v, 1));
// } else {
// e.update_xer_with_carry(b.CreateExtractValue(v, 1));
// }
// if (i.XO.OE) {
// // With XER update.
// e.update_xer_with_overflow_and_carry(b.CreateExtractValue(v, 1));
// } else {
// e.update_xer_with_carry(b.CreateExtractValue(v, 1));
// }
// if (i.XO.Rc) {
// // With cr0 update.
// e.update_cr_with_cond(0, v0, e.get_int64(0), true);
// }
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v, e.get_int64(0), true);
}
// return 0;
// }
return 0;
}
XEEMITTER(subfmex, 0x7C0001D0, XO )(LibjitEmitter& e, jit_function_t f, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
@ -1022,7 +1023,7 @@ void LibjitRegisterEmitCategoryALU() {
XEREGISTERINSTR(addcx, 0X7C000014);
XEREGISTERINSTR(addex, 0x7C000114);
XEREGISTERINSTR(addi, 0x38000000);
//XEREGISTERINSTR(addic, 0x30000000);
XEREGISTERINSTR(addic, 0x30000000);
XEREGISTERINSTR(addicx, 0x34000000);
XEREGISTERINSTR(addis, 0x3C000000);
XEREGISTERINSTR(addmex, 0x7C0001D4);
@ -1039,10 +1040,10 @@ void LibjitRegisterEmitCategoryALU() {
XEREGISTERINSTR(mulli, 0x1C000000);
XEREGISTERINSTR(mullwx, 0x7C0001D6);
//XEREGISTERINSTR(negx, 0x7C0000D0);
//XEREGISTERINSTR(subfx, 0x7C000050);
XEREGISTERINSTR(subfx, 0x7C000050);
XEREGISTERINSTR(subfcx, 0x7C000010);
//XEREGISTERINSTR(subficx, 0x20000000);
//XEREGISTERINSTR(subfex, 0x7C000110);
XEREGISTERINSTR(subfex, 0x7C000110);
XEREGISTERINSTR(subfmex, 0x7C0001D0);
XEREGISTERINSTR(subfzex, 0x7C000190);
XEREGISTERINSTR(cmp, 0x7C000000);