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Merge pull request #2886 from Sonicadvance1/aarch64_faster_lfd

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[AArch64] Optimize lfd instructions if possible.
This commit is contained in:
Ryan Houdek 2015-08-21 05:38:53 -05:00
commit 5f628749ff
3 changed files with 39 additions and 10 deletions
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35
Source/Core/Core/PowerPC/JitArm64/JitArm64_BackPatch.cpp
View file

@ -71,9 +71,22 @@ bool JitArm64::DisasmLoadStore(const u8* ptr, u32* flags, ARM64Reg* reg)
}
else // 64-bit float
{
// Real register is in the INS instruction
u32 ins_inst = *(u32*)(ptr + 8);
*reg = (ARM64Reg)(ins_inst & 0x1F);
u32 ldr_reg = inst & 0x1F;
if (ldr_reg)
{
// Loads directly in to the target register
// No need to dump the flag in to flags here
// The slowmem path always first returns in Q0
// then moves to the destination register
*reg = (ARM64Reg)(ldr_reg);
}
else
{
// Real register is in the INS instruction
u32 ins_inst = *(u32*)(ptr + 8);
*reg = (ARM64Reg)(ins_inst & 0x1F);
}
}
*flags |= BackPatchInfo::FLAG_LOAD;
return true;
@ -165,9 +178,17 @@ void JitArm64::EmitBackpatchRoutine(u32 flags, bool fastmem, bool do_farcode,
}
else
{
m_float_emit.LDR(64, INDEX_UNSIGNED, Q0, addr, 0);
m_float_emit.REV64(8, D0, D0);
m_float_emit.INS(64, RS, 0, Q0, 0);
if (flags & BackPatchInfo::FLAG_ONLY_LOWER)
{
m_float_emit.LDR(64, INDEX_UNSIGNED, EncodeRegToDouble(RS), addr, 0);
m_float_emit.REV64(8, EncodeRegToDouble(RS), EncodeRegToDouble(RS));
}
else
{
m_float_emit.LDR(64, INDEX_UNSIGNED, Q0, addr, 0);
m_float_emit.REV64(8, D0, D0);
m_float_emit.INS(64, RS, 0, Q0, 0);
}
}
}
else if (flags & BackPatchInfo::FLAG_STORE)
@ -217,7 +238,7 @@ void JitArm64::EmitBackpatchRoutine(u32 flags, bool fastmem, bool do_farcode,
handler.addr_reg = addr;
handler.gprs = gprs_to_push;
handler.fprs = fprs_to_push;
handler.flags = flags;
handler.flags = flags & ~BackPatchInfo::FLAG_ONLY_LOWER;
FastmemArea* fastmem_area = &m_fault_to_handler[fastmem_start];
auto handler_loc_iter = m_handler_to_loc.find(handler);

13
Source/Core/Core/PowerPC/JitArm64/JitArm64_LoadStoreFloating.cpp
View file

@ -71,12 +71,19 @@ void JitArm64::lfXX(UGeckoInstruction inst)
u32 imm_addr = 0;
bool is_immediate = false;
// 64 bit loads only load PSR0
fpr.BindToRegister(inst.FD, flags & BackPatchInfo::FLAG_SIZE_F64, flags & BackPatchInfo::FLAG_SIZE_F64);
bool only_lower = !!(flags & BackPatchInfo::FLAG_SIZE_F64);
ARM64Reg VD = fpr.R(inst.FD, flags & BackPatchInfo::FLAG_SIZE_F64);
fpr.BindToRegister(inst.FD, false, only_lower);
ARM64Reg VD = fpr.R(inst.FD, only_lower);
ARM64Reg addr_reg = W0;
if (!fpr.IsLower(inst.FD))
only_lower = false;
if (only_lower)
flags |= BackPatchInfo::FLAG_ONLY_LOWER;
gpr.Lock(W0, W30);
fpr.Lock(Q0);

1
Source/Core/Core/PowerPC/JitArmCommon/BackPatch.h
View file

@ -18,6 +18,7 @@ struct BackPatchInfo
FLAG_SIZE_F64 = (1 << 6),
FLAG_REVERSE = (1 << 7),
FLAG_EXTEND = (1 << 8),
FLAG_ONLY_LOWER = (1 << 9),
};
static u32 GetFlagSize(u32 flags)