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rldicl, rldicr.

This commit is contained in:
Ben Vanik 2013-05-26 16:10:25 -07:00
parent fd86370ccc
commit 86396816f5
2 changed files with 67 additions and 34 deletions
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17
src/xenia/cpu/ppc/disasm_alu.cc
View File

@ -495,12 +495,23 @@ XEDISASMR(rldcrx, 0x78000012, MDS)(InstrData& i, InstrDisasm& d) {
}
XEDISASMR(rldicx, 0x78000008, MD )(InstrData& i, InstrDisasm& d) {
d.Init("rldic", "Rotate Left Doubleword Immediate then Clear",
const char* name;
const char* desc;
uint32_t sh = (i.MD.SH5 << 5) | i.MD.SH;
uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB;
if (mb == 0x3E) {
name = "sldi";
desc = "Shift Left Immediate";
} else {
name = "rldic";
desc = "Rotate Left Doubleword Immediate then Clear";
}
d.Init(name, desc,
i.MD.Rc ? InstrDisasm::kRc : 0);
d.AddRegOperand(InstrRegister::kGPR, i.MD.RA, InstrRegister::kWrite);
d.AddRegOperand(InstrRegister::kGPR, i.MD.RT, InstrRegister::kRead);
d.AddUImmOperand((i.MD.SH5 << 5) | i.MD.SH, 1);
d.AddUImmOperand((i.MD.MB5 << 5) | i.MD.MB, 1);
d.AddUImmOperand(sh, 1);
d.AddUImmOperand(mb, 1);
return d.Finish();
}

84
src/xenia/cpu/x64/x64_emit_alu.cc
View File

@ -866,7 +866,6 @@ XEEMITTER(rldicx, 0x78000008, MD )(X64Emitter& e, X86Compiler& c, InstrDat
return 1;
}
#if 0
XEEMITTER(rldiclx, 0x78000000, MD )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// n <- sh[5] || sh[0:4]
// r <- ROTL64((RS), n)
@ -874,31 +873,59 @@ XEEMITTER(rldiclx, 0x78000000, MD )(X64Emitter& e, X86Compiler& c, InstrDat
// m <- MASK(b, 63)
// RA <- r & m
// uint32_t sh = (i.MD.SH5 << 5) | i.MD.SH;
// uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB;
uint32_t sh = (i.MD.SH5 << 5) | i.MD.SH;
uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB;
uint64_t m = XEMASK(mb, 63);
// jit_value_t v = e.gpr_value(i.MD.RS);
// if (sh) {
// v = // rotate by sh
// }
// if (mb) {
// v = // mask b mb->63
// }
// e.update_gpr_value(i.MD.RA, v);
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.MD.RT));
if (sh) {
c.rol(v, imm(sh));
}
if (m != 0xFFFFFFFFFFFFFFFF) {
GpVar mask(c.newGpVar());
c.mov(mask, imm(m));
c.and_(v, mask);
}
e.update_gpr_value(i.MD.RA, v);
// if (i.MD.Rc) {
// // With cr0 update.
// e.update_cr_with_cond(0, v);
// }
if (i.MD.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v);
}
XEINSTRNOTIMPLEMENTED();
return 1;
return 0;
}
#endif
XEEMITTER(rldicrx, 0x78000004, MD )(X64Emitter& e, X86Compiler& c, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
return 1;
// n <- sh[5] || sh[0:4]
// r <- ROTL64((RS), n)
// e <- me[5] || me[0:4]
// m <- MASK(0, e)
// RA <- r & m
uint32_t sh = (i.MD.SH5 << 5) | i.MD.SH;
uint32_t mb = (i.MD.MB5 << 5) | i.MD.MB;
uint64_t m = XEMASK(0, mb);
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.MD.RT));
if (sh) {
c.rol(v, imm(sh));
}
if (m != 0xFFFFFFFFFFFFFFFF) {
GpVar mask(c.newGpVar());
c.mov(mask, imm(m));
c.and_(v, mask);
}
e.update_gpr_value(i.MD.RA, v);
if (i.MD.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v);
}
return 0;
}
XEEMITTER(rldimix, 0x7800000C, MD )(X64Emitter& e, X86Compiler& c, InstrData& i) {
@ -914,7 +941,9 @@ XEEMITTER(rlwimix, 0x50000000, M )(X64Emitter& e, X86Compiler& c, InstrDat
GpVar v(c.newGpVar());
c.mov(v.r32(), e.gpr_value(i.M.RT).r32()); // truncate
c.rol(v.r32(), imm(i.M.SH));
if (i.M.SH) {
c.rol(v.r32(), imm(i.M.SH));
}
uint64_t m = XEMASK(i.M.MB + 32, i.M.ME + 32);
GpVar mask(c.newGpVar());
c.mov(mask, imm(m));
@ -947,17 +976,10 @@ XEEMITTER(rlwinmx, 0x54000000, M )(X64Emitter& e, X86Compiler& c, InstrDat
// The compiler will generate a bunch of these for the special case of SH=0.
// Which seems to just select some bits and set cr0 for use with a branch.
// We can detect this and do less work.
if (!i.M.SH) {
c.and_(v, imm(XEMASK(i.M.MB + 32, i.M.ME + 32)));
e.update_gpr_value(i.M.RA, v);
if (i.M.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v);
}
return 0;
if (i.M.SH) {
c.rol(v.r32(), imm(i.M.SH));
}
c.rol(v.r32(), imm(i.M.SH));
c.and_(v, imm(XEMASK(i.M.MB + 32, i.M.ME + 32)));
e.update_gpr_value(i.M.RA, v);
@ -1131,7 +1153,7 @@ void X64RegisterEmitCategoryALU() {
XEREGISTERINSTR(rldclx, 0x78000010);
XEREGISTERINSTR(rldcrx, 0x78000012);
XEREGISTERINSTR(rldicx, 0x78000008);
// XEREGISTERINSTR(rldiclx, 0x78000000);
XEREGISTERINSTR(rldiclx, 0x78000000);
XEREGISTERINSTR(rldicrx, 0x78000004);
XEREGISTERINSTR(rldimix, 0x7800000C);
XEREGISTERINSTR(rlwimix, 0x50000000);