# Copyright (C) 2011-2020 Apple Inc. All rights reserved. # Copyright (C) 2013 University of Szeged. All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF # THE POSSIBILITY OF SUCH DAMAGE. require "config" require "ast" require "opt" require "risc" # GPR conventions, to match the baseline JIT # # x0 => t0, a0, r0 # x1 => t1, a1, r1 # x2 => t2, a2, r2 # x3 => t3, a3, r3 # x6 => (callee-save scratch) # x7 => cfr # x8 => t4 (callee-save) # x9 => t5 (callee-save) # x10 => csr1 (callee-save, PB) # x11 => cfr, csr0 (callee-save, metadataTable) # x12 => (callee-save scratch) # lr => lr # sp => sp # pc => pc # # FPR conventions, to match the baseline JIT # # d0 => ft0, fa0, fr # d1 => ft1, fa1 # d2 => ft2 # d3 => ft3 # d4 => ft4 # d5 => ft5 # d6 => (scratch) # d7 => (scratch) class Node def armSingle doubleOperand = armOperand raise "Bogus register name #{doubleOperand}" unless doubleOperand =~ /^d/ "s" + ($~.post_match.to_i * 2).to_s end end class SpecialRegister def armOperand @name end end ARM_EXTRA_GPRS = [SpecialRegister.new("r6"), SpecialRegister.new("r4"), SpecialRegister.new("r12")] ARM_EXTRA_FPRS = [SpecialRegister.new("d7")] ARM_SCRATCH_FPR = SpecialRegister.new("d6") OS_DARWIN = ((RUBY_PLATFORM =~ /darwin/i) != nil) def armMoveImmediate(value, register) # Currently we only handle the simple cases, and fall back to mov/movt for the complex ones. if value.is_a? String $asm.puts "mov #{register.armOperand}, (#{value})" elsif value >= 0 && value < 256 $asm.puts "mov #{register.armOperand}, \##{value}" elsif (~value) >= 0 && (~value) < 256 $asm.puts "mvn #{register.armOperand}, \##{~value}" else $asm.puts "movw #{register.armOperand}, \##{value & 0xffff}" if (value & 0xffff0000) != 0 $asm.puts "movt #{register.armOperand}, \##{(value >> 16) & 0xffff}" end end end class RegisterID def armOperand case name when "t0", "a0", "r0" "r0" when "t1", "a1", "r1" "r1" when "t2", "a2" "r2" when "a3" "r3" when "t3" "r3" when "t4" "r8" when "t5" "r9" when "cfr" "r7" when "csr0" "r11" when "csr1" "r10" when "lr" "lr" when "sp" "sp" when "pc" "pc" else raise "Bad register #{name} for ARM at #{codeOriginString}" end end end class FPRegisterID def armOperand case name when "ft0", "fr", "fa0" "d0" when "ft1", "fa1" "d1" when "ft2" "d2" when "ft3" "d3" when "ft4" "d4" when "ft5" "d5" else raise "Bad register #{name} for ARM at #{codeOriginString}" end end end class Immediate def armOperand raise "Invalid immediate #{value} at #{codeOriginString}" if value < 0 or value > 255 "\##{value}" end end class Address def armOperand raise "Bad offset at #{codeOriginString}" if offset.value < -0xff or offset.value > 0xfff "[#{base.armOperand}, \##{offset.value}]" end end class BaseIndex def armOperand raise "Bad offset at #{codeOriginString}" if offset.value != 0 "[#{base.armOperand}, #{index.armOperand}, lsl \##{scaleShift}]" end end class AbsoluteAddress def armOperand raise "Unconverted absolute address at #{codeOriginString}" end end # # Lea support. # class Address def armEmitLea(destination) if destination == base $asm.puts "adds #{destination.armOperand}, \##{offset.value}" else $asm.puts "adds #{destination.armOperand}, #{base.armOperand}, \##{offset.value}" end end end class BaseIndex def armEmitLea(destination) raise "Malformed BaseIndex, offset should be zero at #{codeOriginString}" unless offset.value == 0 $asm.puts "add #{destination.armOperand}, #{base.armOperand}, #{index.armOperand}, lsl \##{scaleShift}" end end # FIXME: we could support AbsoluteAddress for lea, but we don't. # # Actual lowering code follows. # def armOpcodeReversedOperands(opcode) m = /\Ab[ipb]/.match(opcode) operation = case m.post_match when "eq" then "eq" when "neq" then "neq" when "a" then "b" when "aeq" then "beq" when "b" then "a" when "beq" then "aeq" when "gt" then "lt" when "gteq" then "lteq" when "lt" then "gt" when "lteq" then "gteq" else raise "unknown operation #{m.post_match}" end "#{m[0]}#{operation}" end def armLowerStackPointerInComparison(list) newList = [] list.each { | node | if node.is_a? Instruction case node.opcode when "bieq", "bpeq", "bbeq", "bineq", "bpneq", "bbneq", "bia", "bpa", "bba", "biaeq", "bpaeq", "bbaeq", "bib", "bpb", "bbb", "bibeq", "bpbeq", "bbbeq", "bigt", "bpgt", "bbgt", "bigteq", "bpgteq", "bbgteq", "bilt", "bplt", "bblt", "bilteq", "bplteq", "bblteq" if node.operands[1].is_a?(RegisterID) && node.operands[1].name == "sp" newList << Instruction.new(codeOrigin, armOpcodeReversedOperands(node.opcode), [node.operands[1], node.operands[0]] + node.operands[2..-1]) else newList << node end else newList << node end else newList << node end } newList end def armLowerLabelReferences(list) newList = [] list.each { | node | if node.is_a? Instruction case node.opcode when "leai", "leap", "leaq" labelRef = node.operands[0] if labelRef.is_a? LabelReference raise unless labelRef.offset == 0 tmp = Tmp.new(node.codeOrigin, :gpr) newList << Instruction.new(codeOrigin, "globaladdr", [LabelReference.new(node.codeOrigin, labelRef.label), node.operands[1], tmp]) else newList << node end else newList << node end else newList << node end } newList end class Sequence def getModifiedListARMv7 raise unless $activeBackend == "ARMv7" getModifiedListARMCommon end def getModifiedListARMCommon result = @list result = riscLowerSimpleBranchOps(result) result = riscLowerHardBranchOps(result) result = riscLowerShiftOps(result) result = armLowerLabelReferences(result) result = riscLowerMalformedAddresses(result) { | node, address | if address.is_a? BaseIndex address.offset.value == 0 elsif address.is_a? Address (-0xff..0xfff).include? address.offset.value else false end } result = riscLowerMalformedAddressesDouble(result) result = riscLowerMisplacedImmediates(result, ["storeb", "storeh", "storei", "storep", "storeq"]) result = riscLowerMalformedImmediates(result, 0..0xff, 0..0x0ff) result = riscLowerMisplacedAddresses(result) result = riscLowerRegisterReuse(result) result = assignRegistersToTemporaries(result, :gpr, ARM_EXTRA_GPRS) result = assignRegistersToTemporaries(result, :fpr, ARM_EXTRA_FPRS) result = armLowerStackPointerInComparison(result) return result end end def armOperands(operands) operands.map{|v| v.armOperand}.join(", ") end def armFlippedOperands(operands) armOperands([operands[-1]] + operands[0..-2]) end def emitArmCompact(opcode2, opcode3, operands) if operands.size == 3 $asm.puts "#{opcode3} #{armFlippedOperands(operands)}" else raise unless operands.size == 2 raise unless operands[1].register? if operands[0].immediate? $asm.puts "#{opcode3} #{operands[1].armOperand}, #{operands[1].armOperand}, #{operands[0].armOperand}" else $asm.puts "#{opcode2} #{armFlippedOperands(operands)}" end end end def emitArm(opcode, operands) if operands.size == 3 $asm.puts "#{opcode} #{armFlippedOperands(operands)}" else raise unless operands.size == 2 $asm.puts "#{opcode} #{operands[1].armOperand}, #{operands[1].armOperand}, #{operands[0].armOperand}" end end def emitArmDoubleBranch(branchOpcode, operands) $asm.puts "vcmpe.f64 #{armOperands(operands[0..1])}" $asm.puts "vmrs apsr_nzcv, fpscr" $asm.puts "#{branchOpcode} #{operands[2].asmLabel}" end def emitArmTest(operands) value = operands[0] case operands.size when 2 mask = Immediate.new(codeOrigin, -1) when 3 mask = operands[1] else raise "Expected 2 or 3 operands but got #{operands.size} at #{codeOriginString}" end if mask.immediate? and mask.value == -1 $asm.puts "tst #{value.armOperand}, #{value.armOperand}" else $asm.puts "tst #{value.armOperand}, #{mask.armOperand}" end end def emitArmCompare(operands, code) $asm.puts "movs #{operands[2].armOperand}, \#0" $asm.puts "cmp #{operands[0].armOperand}, #{operands[1].armOperand}" $asm.puts "it #{code}" $asm.puts "mov#{code} #{operands[2].armOperand}, \#1" end def emitArmTestSet(operands, code) $asm.puts "movs #{operands[-1].armOperand}, \#0" emitArmTest(operands) $asm.puts "it #{code}" $asm.puts "mov#{code} #{operands[-1].armOperand}, \#1" end class Instruction def lowerARMv7 raise unless $activeBackend == "ARMv7" lowerARMCommon end def lowerARMCommon case opcode when "addi", "addp", "addis", "addps" if opcode == "addis" or opcode == "addps" suffix = "s" else suffix = "" end if operands.size == 3 and operands[0].immediate? raise unless operands[1].register? raise unless operands[2].register? if operands[0].value == 0 and suffix.empty? unless operands[1] == operands[2] $asm.puts "mov #{operands[2].armOperand}, #{operands[1].armOperand}" end else $asm.puts "adds #{operands[2].armOperand}, #{operands[1].armOperand}, #{operands[0].armOperand}" end elsif operands.size == 3 and operands[0].register? raise unless operands[1].register? raise unless operands[2].register? $asm.puts "adds #{armFlippedOperands(operands)}" else if operands[0].immediate? unless Immediate.new(nil, 0) == operands[0] $asm.puts "adds #{armFlippedOperands(operands)}" end else $asm.puts "add#{suffix} #{armFlippedOperands(operands)}" end end when "andi", "andp" emitArmCompact("ands", "and", operands) when "ori", "orp", "orh" emitArmCompact("orrs", "orr", operands) when "oris" emitArmCompact("orrs", "orrs", operands) when "xori", "xorp" emitArmCompact("eors", "eor", operands) when "lshifti", "lshiftp" emitArmCompact("lsls", "lsls", operands) when "rshifti", "rshiftp" emitArmCompact("asrs", "asrs", operands) when "urshifti", "urshiftp" emitArmCompact("lsrs", "lsrs", operands) when "muli", "mulp" emitArm("mul", operands) when "subi", "subp", "subis" emitArmCompact("subs", "subs", operands) when "negi", "negp" $asm.puts "rsbs #{operands[0].armOperand}, #{operands[0].armOperand}, \#0" when "noti" $asm.puts "mvns #{operands[0].armOperand}, #{operands[0].armOperand}" when "loadi", "loadis", "loadp" $asm.puts "ldr #{armFlippedOperands(operands)}" when "storei", "storep" $asm.puts "str #{armOperands(operands)}" when "loadb" $asm.puts "ldrb #{armFlippedOperands(operands)}" when "loadbsi" $asm.puts "ldrsb.w #{armFlippedOperands(operands)}" when "storeb" $asm.puts "strb #{armOperands(operands)}" when "loadh" $asm.puts "ldrh #{armFlippedOperands(operands)}" when "loadhsi" $asm.puts "ldrsh.w #{armFlippedOperands(operands)}" when "storeh" $asm.puts "strh #{armOperands(operands)}" when "loadd" $asm.puts "vldr.64 #{armFlippedOperands(operands)}" when "stored" $asm.puts "vstr.64 #{armOperands(operands)}" when "addd" emitArm("vadd.f64", operands) when "divd" emitArm("vdiv.f64", operands) when "subd" emitArm("vsub.f64", operands) when "muld" emitArm("vmul.f64", operands) when "sqrtd" $asm.puts "vsqrt.f64 #{armFlippedOperands(operands)}" when "ci2ds" $asm.puts "vmov #{operands[1].armSingle}, #{operands[0].armOperand}" $asm.puts "vcvt.f64.s32 #{operands[1].armOperand}, #{operands[1].armSingle}" when "bdeq" emitArmDoubleBranch("beq", operands) when "bdneq" $asm.puts "vcmpe.f64 #{armOperands(operands[0..1])}" $asm.puts "vmrs apsr_nzcv, fpscr" isUnordered = LocalLabel.unique("bdneq") $asm.puts "bvs #{LocalLabelReference.new(codeOrigin, isUnordered).asmLabel}" $asm.puts "bne #{operands[2].asmLabel}" isUnordered.lower("ARM") when "bdgt" emitArmDoubleBranch("bgt", operands) when "bdgteq" emitArmDoubleBranch("bge", operands) when "bdlt" emitArmDoubleBranch("bmi", operands) when "bdlteq" emitArmDoubleBranch("bls", operands) when "bdequn" $asm.puts "vcmpe.f64 #{armOperands(operands[0..1])}" $asm.puts "vmrs apsr_nzcv, fpscr" $asm.puts "bvs #{operands[2].asmLabel}" $asm.puts "beq #{operands[2].asmLabel}" when "bdnequn" emitArmDoubleBranch("bne", operands) when "bdgtun" emitArmDoubleBranch("bhi", operands) when "bdgtequn" emitArmDoubleBranch("bpl", operands) when "bdltun" emitArmDoubleBranch("blt", operands) when "bdltequn" emitArmDoubleBranch("ble", operands) when "btd2i" # FIXME: may be a good idea to just get rid of this instruction, since the interpreter # currently does not use it. raise "ARM does not support this opcode yet, #{codeOrigin}" when "td2i" $asm.puts "vcvt.s32.f64 #{ARM_SCRATCH_FPR.armSingle}, #{operands[0].armOperand}" $asm.puts "vmov #{operands[1].armOperand}, #{ARM_SCRATCH_FPR.armSingle}" when "bcd2i" $asm.puts "vcvt.s32.f64 #{ARM_SCRATCH_FPR.armSingle}, #{operands[0].armOperand}" $asm.puts "vmov #{operands[1].armOperand}, #{ARM_SCRATCH_FPR.armSingle}" $asm.puts "vcvt.f64.s32 #{ARM_SCRATCH_FPR.armOperand}, #{ARM_SCRATCH_FPR.armSingle}" emitArmDoubleBranch("bne", [ARM_SCRATCH_FPR, operands[0], operands[2]]) $asm.puts "tst #{operands[1].armOperand}, #{operands[1].armOperand}" $asm.puts "beq #{operands[2].asmLabel}" when "movdz" # FIXME: either support this or remove it. raise "ARM does not support this opcode yet, #{codeOrigin}" when "pop" operands.each { | op | $asm.puts "pop { #{op.armOperand} }" } when "push" operands.each { | op | $asm.puts "push { #{op.armOperand} }" } when "move" if operands[0].immediate? armMoveImmediate(operands[0].value, operands[1]) else $asm.puts "mov #{armFlippedOperands(operands)}" end when "mvlbl" $asm.puts "movw #{operands[1].armOperand}, \#:lower16:#{operands[0].value}" $asm.puts "movt #{operands[1].armOperand}, \#:upper16:#{operands[0].value}" when "nop" $asm.puts "nop" when "bieq", "bpeq", "bbeq" if Immediate.new(nil, 0) == operands[0] $asm.puts "tst #{operands[1].armOperand}, #{operands[1].armOperand}" elsif Immediate.new(nil, 0) == operands[1] $asm.puts "tst #{operands[0].armOperand}, #{operands[0].armOperand}" else $asm.puts "cmp #{armOperands(operands[0..1])}" end $asm.puts "beq #{operands[2].asmLabel}" when "bineq", "bpneq", "bbneq" if Immediate.new(nil, 0) == operands[0] $asm.puts "tst #{operands[1].armOperand}, #{operands[1].armOperand}" elsif Immediate.new(nil, 0) == operands[1] $asm.puts "tst #{operands[0].armOperand}, #{operands[0].armOperand}" else $asm.puts "cmp #{armOperands(operands[0..1])}" end $asm.puts "bne #{operands[2].asmLabel}" when "bia", "bpa", "bba" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "bhi #{operands[2].asmLabel}" when "biaeq", "bpaeq", "bbaeq" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "bhs #{operands[2].asmLabel}" when "bib", "bpb", "bbb" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "blo #{operands[2].asmLabel}" when "bibeq", "bpbeq", "bbbeq" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "bls #{operands[2].asmLabel}" when "bigt", "bpgt", "bbgt" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "bgt #{operands[2].asmLabel}" when "bigteq", "bpgteq", "bbgteq" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "bge #{operands[2].asmLabel}" when "bilt", "bplt", "bblt" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "blt #{operands[2].asmLabel}" when "bilteq", "bplteq", "bblteq" $asm.puts "cmp #{armOperands(operands[0..1])}" $asm.puts "ble #{operands[2].asmLabel}" when "btiz", "btpz", "btbz" emitArmTest(operands) $asm.puts "beq #{operands[-1].asmLabel}" when "btinz", "btpnz", "btbnz" emitArmTest(operands) $asm.puts "bne #{operands[-1].asmLabel}" when "btis", "btps", "btbs" emitArmTest(operands) $asm.puts "bmi #{operands[-1].asmLabel}" when "jmp" if operands[0].label? $asm.puts "b #{operands[0].asmLabel}" else $asm.puts "mov pc, #{operands[0].armOperand}" end when "call" if operands[0].label? if OS_DARWIN $asm.puts "blx #{operands[0].asmLabel}" else $asm.puts "bl #{operands[0].asmLabel}" end else $asm.puts "blx #{operands[0].armOperand}" end when "break" $asm.puts "bkpt #0" when "ret" $asm.puts "bx lr" when "cieq", "cpeq", "cbeq" emitArmCompare(operands, "eq") when "cineq", "cpneq", "cbneq" emitArmCompare(operands, "ne") when "cia", "cpa", "cba" emitArmCompare(operands, "hi") when "ciaeq", "cpaeq", "cbaeq" emitArmCompare(operands, "hs") when "cib", "cpb", "cbb" emitArmCompare(operands, "lo") when "cibeq", "cpbeq", "cbbeq" emitArmCompare(operands, "ls") when "cigt", "cpgt", "cbgt" emitArmCompare(operands, "gt") when "cigteq", "cpgteq", "cbgteq" emitArmCompare(operands, "ge") when "cilt", "cplt", "cblt" emitArmCompare(operands, "lt") when "cilteq", "cplteq", "cblteq" emitArmCompare(operands, "le") when "tis", "tbs", "tps" emitArmTestSet(operands, "mi") when "tiz", "tbz", "tpz" emitArmTestSet(operands, "eq") when "tinz", "tbnz", "tpnz" emitArmTestSet(operands, "ne") when "peek" $asm.puts "ldr #{operands[1].armOperand}, [sp, \##{operands[0].value * 4}]" when "poke" $asm.puts "str #{operands[1].armOperand}, [sp, \##{operands[0].value * 4}]" when "fii2d" $asm.puts "vmov #{operands[2].armOperand}, #{operands[0].armOperand}, #{operands[1].armOperand}" when "fd2ii" $asm.puts "vmov #{operands[1].armOperand}, #{operands[2].armOperand}, #{operands[0].armOperand}" when "bo" $asm.puts "bvs #{operands[0].asmLabel}" when "bs" $asm.puts "bmi #{operands[0].asmLabel}" when "bz" $asm.puts "beq #{operands[0].asmLabel}" when "bnz" $asm.puts "bne #{operands[0].asmLabel}" when "leai", "leap" operands[0].armEmitLea(operands[1]) when "smulli" raise "Wrong number of arguments to smull in #{self.inspect} at #{codeOriginString}" unless operands.length == 4 $asm.puts "smull #{operands[2].armOperand}, #{operands[3].armOperand}, #{operands[0].armOperand}, #{operands[1].armOperand}" when "memfence" $asm.puts "dmb sy" when "clrbp" $asm.puts "bic #{operands[2].armOperand}, #{operands[0].armOperand}, #{operands[1].armOperand}" when "globaladdr" labelRef = operands[0] dest = operands[1] temp = operands[2] uid = $asm.newUID $asm.putStr("#if OS(DARWIN)") $asm.puts "movw #{operands[1].armOperand}, :lower16:(L#{operands[0].asmLabel}_#{uid}$non_lazy_ptr-(L_offlineasm_#{uid}+4))" $asm.puts "movt #{operands[1].armOperand}, :upper16:(L#{operands[0].asmLabel}_#{uid}$non_lazy_ptr-(L_offlineasm_#{uid}+4))" $asm.puts "L_offlineasm_#{uid}:" $asm.puts "add #{operands[1].armOperand}, pc" $asm.puts "ldr #{operands[1].armOperand}, [#{operands[1].armOperand}]" # On Linux, use ELF GOT relocation specifiers. $asm.putStr("#elif OS(LINUX)") gotLabel = Assembler.localLabelReference("offlineasm_arm_got_#{uid}") offsetLabel = Assembler.localLabelReference("offlineasm_arm_got_offset_#{uid}") $asm.puts "ldr #{dest.armOperand}, #{gotLabel}" $asm.puts "ldr #{temp.armOperand}, #{gotLabel}+4" $asm.puts "#{offsetLabel}:" $asm.puts "add #{dest.armOperand}, pc, #{dest.armOperand}" $asm.puts "ldr #{dest.armOperand}, [#{dest.armOperand}, #{temp.armOperand}]" # Throw a compiler error everywhere else. $asm.putStr("#else") $asm.putStr("#error Missing globaladdr implementation") $asm.putStr("#endif") offset = 4 $asm.deferNextLabelAction { $asm.putStr("#if OS(DARWIN)") $asm.puts ".section __DATA,__nl_symbol_ptr,non_lazy_symbol_pointers" $asm.puts ".p2align 2" $asm.puts "L#{operands[0].asmLabel}_#{uid}$non_lazy_ptr:" $asm.puts ".indirect_symbol #{operands[0].asmLabel}" $asm.puts ".long 0" $asm.puts ".text" $asm.puts ".align 4" $asm.putStr("#elif OS(LINUX)") $asm.puts "#{gotLabel}:" $asm.puts ".word _GLOBAL_OFFSET_TABLE_-(#{offsetLabel}+#{offset})" $asm.puts ".word #{labelRef.asmLabel}(GOT)" $asm.putStr("#endif") } else lowerDefault end end end