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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Lowering arithmetic
(Add64 x y) -> (ADD x y)
(AddPtr x y) -> (ADD x y)
(Add32 x y) -> (ADD (SignExt32to64 x) (SignExt32to64 y))
(Add16 x y) -> (ADD (SignExt16to64 x) (SignExt16to64 y))
(Add8 x y) -> (ADD (SignExt8to64 x) (SignExt8to64 y))
(Add64F x y) -> (FADD x y)
(Add32F x y) -> (FADDS x y)
(Sub64 x y) -> (SUB x y)
(SubPtr x y) -> (SUB x y)
(Sub32 x y) -> (SUB x y)
(Sub16 x y) -> (SUB (SignExt16to64 x) (SignExt16to64 y))
(Sub8 x y) -> (SUB (SignExt8to64 x) (SignExt8to64 y))
(Sub32F x y) -> (FSUBS x y)
(Sub64F x y) -> (FSUB x y)
(Mul64 x y) -> (MULLD x y)
(Mul32 x y) -> (MULLW x y)
(Mul16 x y) -> (MULLW (SignExt16to32 x) (SignExt16to32 y))
(Mul8 x y) -> (MULLW (SignExt8to32 x) (SignExt8to32 y))
(Mul32F x y) -> (FMULS x y)
(Mul64F x y) -> (FMUL x y)
(Div32F x y) -> (FDIVS x y)
(Div64F x y) -> (FDIV x y)
// Lowering constants
(Const8 [val]) -> (MOVWconst [val])
(Const16 [val]) -> (MOVWconst [val])
(Const32 [val]) -> (MOVWconst [val])
(Const64 [val]) -> (MOVDconst [val])
(Const32F [val]) -> (FMOVSconst [val])
(Const64F [val]) -> (FMOVDconst [val])
(ConstNil) -> (MOVDconst [0])
(ConstBool [b]) -> (MOVBconst [b])
(Addr {sym} base) -> (MOVDaddr {sym} base)
// (Addr {sym} base) -> (ADDconst {sym} base)
(OffPtr [off] ptr) -> (ADD (MOVDconst <config.Frontend().TypeInt64()> [off]) ptr)
(StaticCall [argwid] {target} mem) -> (CALLstatic [argwid] {target} mem)
(And64 x y) -> (AND x y)
(And32 x y) -> (AND (ZeroExt32to64 x) (ZeroExt32to64 y)) // Or? (AND (ZeroExt32to64 x) (ZeroExt32to64 y))
(And16 x y) -> (AND (ZeroExt16to64 x) (ZeroExt16to64 y))
(And8 x y) -> (AND (ZeroExt8to64 x) (ZeroExt8to64 y))
(Or64 x y) -> (OR x y)
(Or32 x y) -> (OR (ZeroExt32to64 x) (ZeroExt32to64 y))
(Or16 x y) -> (OR (ZeroExt16to64 x) (ZeroExt16to64 y))
(Or8 x y) -> (OR (ZeroExt8to64 x) (ZeroExt8to64 y))
(Xor64 x y) -> (XOR x y)
(Xor32 x y) -> (XOR (ZeroExt32to64 x) (ZeroExt32to64 y))
(Xor16 x y) -> (XOR (ZeroExt16to64 x) (ZeroExt16to64 y))
(Xor8 x y) -> (XOR (ZeroExt8to64 x) (ZeroExt8to64 y))
(Neg64 x) -> (NEG x)
(Neg32 x) -> (NEG (ZeroExt32to64 x))
(Neg16 x) -> (NEG (ZeroExt16to64 x))
(Neg8 x) -> (NEG (ZeroExt8to64 x))
// Lowering comparisons
(Eq8 x y) -> (Equal (CMPW (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Eq16 x y) -> (Equal (CMPW (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Eq32 x y) -> (Equal (CMPW x y))
(Eq64 x y) -> (Equal (CMP x y))
(EqPtr x y) -> (Equal (CMP x y))
(Neq8 x y) -> (NotEqual (CMPW (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Neq16 x y) -> (NotEqual (CMPW (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Neq32 x y) -> (NotEqual (CMPW x y))
(Neq64 x y) -> (NotEqual (CMP x y))
(NeqPtr x y) -> (NotEqual (CMP x y))
(Less8 x y) -> (LessThan (CMPW (SignExt8to32 x) (SignExt8to32 y)))
(Less16 x y) -> (LessThan (CMPW (SignExt16to32 x) (SignExt16to32 y)))
(Less32 x y) -> (LessThan (CMPW x y))
(Less64 x y) -> (LessThan (CMP x y))
(Less8U x y) -> (LessThan (CMPWU (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Less16U x y) -> (LessThan (CMPWU (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Less32U x y) -> (LessThan (CMPWU x y))
(Less64U x y) -> (LessThan (CMPU x y))
(Leq8 x y) -> (LessEqual (CMPW (SignExt8to32 x) (SignExt8to32 y)))
(Leq16 x y) -> (LessEqual (CMPW (SignExt16to32 x) (SignExt16to32 y)))
(Leq32 x y) -> (LessEqual (CMPW x y))
(Leq64 x y) -> (LessEqual (CMP x y))
(Leq8U x y) -> (LessEqual (CMPWU (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Leq16U x y) -> (LessEqual (CMPWU (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Leq32U x y) -> (LessEqual (CMPWU x y))
(Leq64U x y) -> (LessEqual (CMPU x y))
(Greater8 x y) -> (GreaterThan (CMPW (SignExt8to32 x) (SignExt8to32 y)))
(Greater16 x y) -> (GreaterThan (CMPW (SignExt16to32 x) (SignExt16to32 y)))
(Greater32 x y) -> (GreaterThan (CMPW x y))
(Greater64 x y) -> (GreaterThan (CMP x y))
(Greater8U x y) -> (GreaterThan (CMPWU (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Greater16U x y) -> (GreaterThan (CMPWU (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Greater32U x y) -> (GreaterThan (CMPWU x y))
(Greater64U x y) -> (GreaterThan (CMPU x y))
(Geq8 x y) -> (GreaterEqual (CMPW (SignExt8to32 x) (SignExt8to32 y)))
(Geq16 x y) -> (GreaterEqual (CMPW (SignExt16to32 x) (SignExt16to32 y)))
(Geq32 x y) -> (GreaterEqual (CMPW x y))
(Geq64 x y) -> (GreaterEqual (CMP x y))
(Geq8U x y) -> (GreaterEqual (CMPU (ZeroExt8to32 x) (ZeroExt8to32 y)))
(Geq16U x y) -> (GreaterEqual (CMPU (ZeroExt16to32 x) (ZeroExt16to32 y)))
(Geq32U x y) -> (GreaterEqual (CMPU x y))
(Geq64U x y) -> (GreaterEqual (CMPU x y))
(Less64F x y) -> (LessThan (FCMPU x y))
(Leq64F x y) -> (LessEqual (FCMPU x y)) // ??
(Eq64F x y) -> (Equal (FCMPU x y))
(Neq64F x y) -> (NotEqual (FCMPU x y))
// Absorb pseudo-ops into blocks.
(If (Equal cc) yes no) -> (EQ cc yes no)
(If (NotEqual cc) yes no) -> (NE cc yes no)
(If (LessThan cc) yes no) -> (LT cc yes no)
(If (LessEqual cc) yes no) -> (LE cc yes no)
(If (GreaterThan cc) yes no) -> (GT cc yes no)
(If (GreaterEqual cc) yes no) -> (GE cc yes no)
(If cond yes no) -> (NE (CMPconst [0] cond) yes no)
// Absorb boolean tests into block
(NE (CMPconst [0] (Equal cc)) yes no) -> (EQ cc yes no)
(NE (CMPconst [0] (NotEqual cc)) yes no) -> (NE cc yes no)
(NE (CMPconst [0] (LessThan cc)) yes no) -> (LT cc yes no)
(NE (CMPconst [0] (LessEqual cc)) yes no) -> (LE cc yes no)
(NE (CMPconst [0] (GreaterThan cc)) yes no) -> (GT cc yes no)
(NE (CMPconst [0] (GreaterEqual cc)) yes no) -> (GE cc yes no)
// Lowering loads
(Load <t> ptr mem) && (is64BitInt(t) || isPtr(t)) -> (MOVDload ptr mem)
(Load <t> ptr mem) && is32BitInt(t) && isSigned(t) -> (MOVWload ptr mem)
(Load <t> ptr mem) && is32BitInt(t) && !isSigned(t) -> (MOVWZload ptr mem)
(Load <t> ptr mem) && is16BitInt(t) && isSigned(t) -> (MOVHload ptr mem)
(Load <t> ptr mem) && is16BitInt(t) && !isSigned(t) -> (MOVHZload ptr mem)
(Load <t> ptr mem) && (t.IsBoolean() || (is8BitInt(t) && isSigned(t))) -> (MOVBload ptr mem)
(Load <t> ptr mem) && is8BitInt(t) && !isSigned(t) -> (MOVBZload ptr mem)
(Load <t> ptr mem) && is32BitFloat(t) -> (FMOVSload ptr mem)
(Load <t> ptr mem) && is64BitFloat(t) -> (FMOVDload ptr mem)
(Store [8] ptr val mem) -> (MOVDstore ptr val mem)
(Store [4] ptr val mem) -> (MOVWstore ptr val mem)
(Store [2] ptr val mem) -> (MOVHstore ptr val mem)
(Store [1] ptr val mem) -> (MOVBstore ptr val mem)
(Zero [s] _ mem) && SizeAndAlign(s).Size() == 0 -> mem
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 1 -> (MOVBstoreconst [0] destptr mem)
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 2 && SizeAndAlign(s).Align()%2 == 0 ->
(MOVHstoreconst [0] destptr mem)
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 2 ->
(MOVBstoreconst [makeValAndOff(0,1)] destptr
(MOVBstoreconst [0] destptr mem))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 4 && SizeAndAlign(s).Align()%4 == 0 ->
(MOVWstoreconst [0] destptr mem)
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 4 && SizeAndAlign(s).Align()%2 == 0 ->
(MOVHstoreconst [makeValAndOff(0,2)] destptr
(MOVHstoreconst [0] destptr mem))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 4 ->
(MOVBstoreconst [makeValAndOff(0,3)] destptr
(MOVBstoreconst [makeValAndOff(0,2)] destptr
(MOVBstoreconst [makeValAndOff(0,1)] destptr
(MOVBstoreconst [0] destptr mem))))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 8 && SizeAndAlign(s).Align()%8 == 0 ->
(MOVDstoreconst [0] destptr mem)
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 8 && SizeAndAlign(s).Align()%4 == 0 ->
(MOVWstoreconst [makeValAndOff(0,4)] destptr
(MOVWstoreconst [0] destptr mem))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 8 && SizeAndAlign(s).Align()%2 == 0 ->
(MOVHstoreconst [makeValAndOff(0,6)] destptr
(MOVHstoreconst [makeValAndOff(0,4)] destptr
(MOVHstoreconst [makeValAndOff(0,2)] destptr
(MOVHstoreconst [0] destptr mem))))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 3 ->
(MOVBstoreconst [makeValAndOff(0,2)] destptr
(MOVBstoreconst [makeValAndOff(0,1)] destptr
(MOVBstoreconst [0] destptr mem)))
// Zero small numbers of words directly.
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 16 && SizeAndAlign(s).Align()%8 == 0 ->
(MOVDstoreconst [makeValAndOff(0,8)] destptr
(MOVDstoreconst [0] destptr mem))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 24 && SizeAndAlign(s).Align()%8 == 0 ->
(MOVDstoreconst [makeValAndOff(0,16)] destptr
(MOVDstoreconst [makeValAndOff(0,8)] destptr
(MOVDstoreconst [0] destptr mem)))
(Zero [s] destptr mem) && SizeAndAlign(s).Size() == 32 && SizeAndAlign(s).Align()%8 == 0 ->
(MOVDstoreconst [makeValAndOff(0,24)] destptr
(MOVDstoreconst [makeValAndOff(0,16)] destptr
(MOVDstoreconst [makeValAndOff(0,8)] destptr
(MOVDstoreconst [0] destptr mem))))
// Optimizations
(ADD (MOVDconst [c]) x) -> (ADDconst [c] x)
(ADD x (MOVDconst [c])) -> (ADDconst [c] x)
(MOVDstore [off1] {sym} (ADDconst [off2] x) val mem) && is16Bit(off1+off2) -> (MOVDstore [off1+off2] {sym} x val mem)
(MOVWstore [off1] {sym} (ADDconst [off2] x) val mem) && is16Bit(off1+off2) -> (MOVWstore [off1+off2] {sym} x val mem)
(MOVHstore [off1] {sym} (ADDconst [off2] x) val mem) && is16Bit(off1+off2) -> (MOVHstore [off1+off2] {sym} x val mem)
(MOVBstore [off1] {sym} (ADDconst [off2] x) val mem) && is16Bit(off1+off2) -> (MOVBstore [off1+off2] {sym} x val mem)
// TODO MOV*storeconst is wrong for PPC
// (MOVDstore ptr (MOVDconst [c]) mem) && c == 0 -> (MOVDstoreconst [c] ptr mem)
// Lowering extension
// Note: we always extend to 64 bits even though some ops don't need that many result bits.
(SignExt8to16 x) -> (MOVBreg x)
(SignExt8to32 x) -> (MOVBreg x)
(SignExt8to64 x) -> (MOVBreg x)
(SignExt16to32 x) -> (MOVHreg x)
(SignExt16to64 x) -> (MOVHreg x)
(SignExt32to64 x) -> (MOVWreg x)
(ZeroExt8to16 x) -> (MOVBZreg x)
(ZeroExt8to32 x) -> (MOVBZreg x)
(ZeroExt8to64 x) -> (MOVBZreg x)
(ZeroExt16to32 x) -> (MOVHZreg x)
(ZeroExt16to64 x) -> (MOVHZreg x)
(ZeroExt32to64 x) -> (MOVWZreg x)
(Trunc16to8 x) -> (MOVBreg x)
(Trunc32to8 x) -> (MOVBreg x)
(Trunc32to16 x) -> (MOVHreg x)
(Trunc64to8 x) -> (MOVBreg x)
(Trunc64to16 x) -> (MOVHreg x)
(Trunc64to32 x) -> (MOVWreg x)
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