SystemZPatterns.td [plain text]
//===-- SystemZPatterns.td - SystemZ-specific pattern rules ---*- tblgen-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// Record that INSN performs a 64-bit version of unary operator OPERATOR
// in which the operand is sign-extended from 32 to 64 bits.
multiclass SXU<SDPatternOperator operator, Instruction insn> {
def : Pat<(operator (sext (i32 GR32:$src))),
(insn GR32:$src)>;
def : Pat<(operator (sext_inreg GR64:$src, i32)),
(insn (EXTRACT_SUBREG GR64:$src, subreg_l32))>;
}
// Record that INSN performs a 64-bit version of binary operator OPERATOR
// in which the first operand has class CLS and which the second operand
// is sign-extended from a 32-bit register.
multiclass SXB<SDPatternOperator operator, RegisterOperand cls,
Instruction insn> {
def : Pat<(operator cls:$src1, (sext GR32:$src2)),
(insn cls:$src1, GR32:$src2)>;
def : Pat<(operator cls:$src1, (sext_inreg GR64:$src2, i32)),
(insn cls:$src1, (EXTRACT_SUBREG GR64:$src2, subreg_l32))>;
}
// Like SXB, but for zero extension.
multiclass ZXB<SDPatternOperator operator, RegisterOperand cls,
Instruction insn> {
def : Pat<(operator cls:$src1, (zext GR32:$src2)),
(insn cls:$src1, GR32:$src2)>;
def : Pat<(operator cls:$src1, (and GR64:$src2, 0xffffffff)),
(insn cls:$src1, (EXTRACT_SUBREG GR64:$src2, subreg_l32))>;
}
// Record that INSN performs a binary read-modify-write operation,
// with LOAD, OPERATOR and STORE being the read, modify and write
// respectively. MODE is the addressing mode and IMM is the type
// of the second operand.
class RMWI<SDPatternOperator load, SDPatternOperator operator,
SDPatternOperator store, AddressingMode mode,
PatFrag imm, Instruction insn>
: Pat<(store (operator (load mode:$addr), imm:$src), mode:$addr),
(insn mode:$addr, (UIMM8 imm:$src))>;
// Record that INSN performs binary operation OPERATION on a byte
// memory location. IMM is the type of the second operand.
multiclass RMWIByte<SDPatternOperator operator, AddressingMode mode,
Instruction insn> {
def : RMWI<anyextloadi8, operator, truncstorei8, mode, imm32, insn>;
def : RMWI<anyextloadi8, operator, truncstorei8, mode, imm64, insn>;
}
// Record that INSN performs insertion TYPE into a register of class CLS.
// The inserted operand is loaded using LOAD from an address of mode MODE.
multiclass InsertMem<string type, Instruction insn, RegisterOperand cls,
SDPatternOperator load, AddressingMode mode> {
def : Pat<(!cast<SDPatternOperator>("or_as_"##type)
cls:$src1, (load mode:$src2)),
(insn cls:$src1, mode:$src2)>;
def : Pat<(!cast<SDPatternOperator>("or_as_rev"##type)
(load mode:$src2), cls:$src1),
(insn cls:$src1, mode:$src2)>;
}
// INSN stores the low 32 bits of a GPR to a memory with addressing mode MODE.
// Record that it is equivalent to using OPERATOR to store a GR64.
class StoreGR64<Instruction insn, SDPatternOperator operator,
AddressingMode mode>
: Pat<(operator GR64:$R1, mode:$XBD2),
(insn (EXTRACT_SUBREG GR64:$R1, subreg_l32), mode:$XBD2)>;
// INSN and INSNY are an RX/RXY pair of instructions that store the low
// 32 bits of a GPR to memory. Record that they are equivalent to using
// OPERATOR to store a GR64.
multiclass StoreGR64Pair<Instruction insn, Instruction insny,
SDPatternOperator operator> {
def : StoreGR64<insn, operator, bdxaddr12pair>;
def : StoreGR64<insny, operator, bdxaddr20pair>;
}
// INSN stores the low 32 bits of a GPR using PC-relative addressing.
// Record that it is equivalent to using OPERATOR to store a GR64.
class StoreGR64PC<Instruction insn, SDPatternOperator operator>
: Pat<(operator GR64:$R1, pcrel32:$XBD2),
(insn (EXTRACT_SUBREG GR64:$R1, subreg_l32), pcrel32:$XBD2)> {
// We want PC-relative addresses to be tried ahead of BD and BDX addresses.
// However, BDXs have two extra operands and are therefore 6 units more
// complex.
let AddedComplexity = 7;
}
// INSN and INSNINV conditionally store the low 32 bits of a GPR to memory,
// with INSN storing when the condition is true and INSNINV storing when the
// condition is false. Record that they are equivalent to a LOAD/select/STORE
// sequence for GR64s.
multiclass CondStores64<Instruction insn, Instruction insninv,
SDPatternOperator store, SDPatternOperator load,
AddressingMode mode> {
def : Pat<(store (z_select_ccmask GR64:$new, (load mode:$addr),
uimm8zx4:$valid, uimm8zx4:$cc),
mode:$addr),
(insn (EXTRACT_SUBREG GR64:$new, subreg_l32), mode:$addr,
uimm8zx4:$valid, uimm8zx4:$cc)>;
def : Pat<(store (z_select_ccmask (load mode:$addr), GR64:$new,
uimm8zx4:$valid, uimm8zx4:$cc),
mode:$addr),
(insninv (EXTRACT_SUBREG GR64:$new, subreg_l32), mode:$addr,
uimm8zx4:$valid, uimm8zx4:$cc)>;
}
// Try to use MVC instruction INSN for a load of type LOAD followed by a store
// of the same size. VT is the type of the intermediate (legalized) value and
// LENGTH is the number of bytes loaded by LOAD.
multiclass MVCLoadStore<SDPatternOperator load, ValueType vt, Instruction insn,
bits<5> length> {
def : Pat<(mvc_store (vt (load bdaddr12only:$src)), bdaddr12only:$dest),
(insn bdaddr12only:$dest, bdaddr12only:$src, length)>;
}
// Use NC-like instruction INSN for block_op operation OPERATOR.
// The other operand is a load of type LOAD, which accesses LENGTH bytes.
// VT is the intermediate legalized type in which the binary operation
// is actually done.
multiclass BinaryLoadStore<SDPatternOperator operator, SDPatternOperator load,
ValueType vt, Instruction insn, bits<5> length> {
def : Pat<(operator (vt (load bdaddr12only:$src)), bdaddr12only:$dest),
(insn bdaddr12only:$dest, bdaddr12only:$src, length)>;
}
// A convenient way of generating all block peepholes for a particular
// LOAD/VT/LENGTH combination.
multiclass BlockLoadStore<SDPatternOperator load, ValueType vt,
Instruction mvc, Instruction nc, Instruction oc,
Instruction xc, bits<5> length> {
defm : MVCLoadStore<load, vt, mvc, length>;
defm : BinaryLoadStore<block_and1, load, vt, nc, length>;
defm : BinaryLoadStore<block_and2, load, vt, nc, length>;
defm : BinaryLoadStore<block_or1, load, vt, oc, length>;
defm : BinaryLoadStore<block_or2, load, vt, oc, length>;
defm : BinaryLoadStore<block_xor1, load, vt, xc, length>;
defm : BinaryLoadStore<block_xor2, load, vt, xc, length>;
}
// Record that INSN is a LOAD AND TEST that can be used to compare
// registers in CLS against zero. The instruction has separate R1 and R2
// operands, but they must be the same when the instruction is used like this.
multiclass CompareZeroFP<Instruction insn, RegisterOperand cls> {
def : Pat<(z_fcmp cls:$reg, (fpimm0)), (insn cls:$reg, cls:$reg)>;
// The sign of the zero makes no difference.
def : Pat<(z_fcmp cls:$reg, (fpimmneg0)), (insn cls:$reg, cls:$reg)>;
}