diff options
Diffstat (limited to 'Source/JavaScriptCore/offlineasm/armv7.rb')
| -rw-r--r-- | Source/JavaScriptCore/offlineasm/armv7.rb | 535 |
1 files changed, 26 insertions, 509 deletions
diff --git a/Source/JavaScriptCore/offlineasm/armv7.rb b/Source/JavaScriptCore/offlineasm/armv7.rb index 07543574e..ab0496f71 100644 --- a/Source/JavaScriptCore/offlineasm/armv7.rb +++ b/Source/JavaScriptCore/offlineasm/armv7.rb @@ -1,4 +1,4 @@ -# Copyright (C) 2011 Apple Inc. All rights reserved. +# Copyright (C) 2011, 2012 Apple Inc. All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions @@ -24,6 +24,7 @@ require "config" require "ast" require "opt" +require "risc" class Node def armV7Single @@ -33,7 +34,7 @@ class Node end end -class SpecialRegister < NoChildren +class SpecialRegister def armV7Operand @name end @@ -133,487 +134,6 @@ class AbsoluteAddress end # -# Lowering of branch ops. For example: -# -# baddiz foo, bar, baz -# -# will become: -# -# addi foo, bar -# bz baz -# - -def armV7LowerBranchOps(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - annotation = node.annotation - case node.opcode - when /^b(addi|subi|ori|addp)/ - op = $1 - branch = "b" + $~.post_match - - case op - when "addi", "addp" - op = "addis" - when "subi" - op = "subis" - when "ori" - op = "oris" - end - - newList << Instruction.new(node.codeOrigin, op, node.operands[0..-2], annotation) - newList << Instruction.new(node.codeOrigin, branch, [node.operands[-1]]) - when "bmulio" - tmp1 = Tmp.new(node.codeOrigin, :gpr) - tmp2 = Tmp.new(node.codeOrigin, :gpr) - newList << Instruction.new(node.codeOrigin, "smulli", [node.operands[0], node.operands[1], node.operands[1], tmp1], annotation) - newList << Instruction.new(node.codeOrigin, "rshifti", [node.operands[-2], Immediate.new(node.codeOrigin, 31), tmp2]) - newList << Instruction.new(node.codeOrigin, "bineq", [tmp1, tmp2, node.operands[-1]]) - when /^bmuli/ - condition = $~.post_match - newList << Instruction.new(node.codeOrigin, "muli", node.operands[0..-2], annotation) - newList << Instruction.new(node.codeOrigin, "bti" + condition, [node.operands[-2], node.operands[-1]]) - else - newList << node - end - else - newList << node - end - } - newList -end - -# -# Lowering of shift ops. For example: -# -# lshifti foo, bar -# -# will become: -# -# andi foo, 31, tmp -# lshifti tmp, bar -# - -def armV7SanitizeShift(operand, list) - return operand if operand.immediate? - - tmp = Tmp.new(operand.codeOrigin, :gpr) - list << Instruction.new(operand.codeOrigin, "andi", [operand, Immediate.new(operand.codeOrigin, 31), tmp]) - tmp -end - -def armV7LowerShiftOps(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - case node.opcode - when "lshifti", "rshifti", "urshifti", "lshiftp", "rshiftp", "urshiftp" - if node.operands.size == 2 - newList << Instruction.new(node.codeOrigin, node.opcode, [armV7SanitizeShift(node.operands[0], newList), node.operands[1]], node.annotation) - else - newList << Instruction.new(node.codeOrigin, node.opcode, [node.operands[0], armV7SanitizeShift(node.operands[1], newList), node.operands[2]], node.annotation) - raise "Wrong number of operands for shift at #{node.codeOriginString}" unless node.operands.size == 3 - end - else - newList << node - end - else - newList << node - end - } - newList -end - -# -# Lowering of malformed addresses. For example: -# -# loadp 10000[foo], bar -# -# will become: -# -# move 10000, tmp -# addp foo, tmp -# loadp 0[tmp], bar -# - -class Node - def armV7LowerMalformedAddressesRecurse(list) - mapChildren { - | node | - node.armV7LowerMalformedAddressesRecurse(list) - } - end -end - -class Address - def armV7LowerMalformedAddressesRecurse(list) - if offset.value < -0xff or offset.value > 0xfff - tmp = Tmp.new(codeOrigin, :gpr) - list << Instruction.new(codeOrigin, "move", [offset, tmp]) - list << Instruction.new(codeOrigin, "addp", [base, tmp]) - Address.new(codeOrigin, tmp, Immediate.new(codeOrigin, 0)) - else - self - end - end -end - -class BaseIndex - def armV7LowerMalformedAddressesRecurse(list) - if offset.value != 0 - tmp = Tmp.new(codeOrigin, :gpr) - list << Instruction.new(codeOrigin, "move", [offset, tmp]) - list << Instruction.new(codeOrigin, "addp", [base, tmp]) - BaseIndex.new(codeOrigin, tmp, index, scale, Immediate.new(codeOrigin, 0)) - else - self - end - end -end - -class AbsoluteAddress - def armV7LowerMalformedAddressesRecurse(list) - tmp = Tmp.new(codeOrigin, :gpr) - list << Instruction.new(codeOrigin, "move", [address, tmp]) - Address.new(codeOrigin, tmp, Immediate.new(codeOrigin, 0)) - end -end - -def armV7LowerMalformedAddresses(list) - newList = [] - list.each { - | node | - newList << node.armV7LowerMalformedAddressesRecurse(newList) - } - newList -end - -# -# Lowering of malformed addresses in double loads and stores. For example: -# -# loadd [foo, bar, 8], baz -# -# becomes: -# -# leap [foo, bar, 8], tmp -# loadd [tmp], baz -# - -class Node - def armV7DoubleAddress(list) - self - end -end - -class BaseIndex - def armV7DoubleAddress(list) - tmp = Tmp.new(codeOrigin, :gpr) - list << Instruction.new(codeOrigin, "leap", [self, tmp]) - Address.new(codeOrigin, tmp, Immediate.new(codeOrigin, 0)) - end -end - -def armV7LowerMalformedAddressesDouble(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - case node.opcode - when "loadd" - newList << Instruction.new(node.codeOrigin, "loadd", [node.operands[0].armV7DoubleAddress(newList), node.operands[1]], node.annotation) - when "stored" - newList << Instruction.new(node.codeOrigin, "stored", [node.operands[0], node.operands[1].armV7DoubleAddress(newList)], node.annotation) - else - newList << node - end - else - newList << node - end - } - newList -end - -# -# Lowering of misplaced immediates. For example: -# -# storei 0, [foo] -# -# will become: -# -# move 0, tmp -# storei tmp, [foo] -# - -def armV7LowerMisplacedImmediates(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - case node.opcode - when "storeb", "storei", "storep" - operands = node.operands - newOperands = [] - operands.each { - | operand | - if operand.is_a? Immediate - tmp = Tmp.new(operand.codeOrigin, :gpr) - newList << Instruction.new(operand.codeOrigin, "move", [operand, tmp]) - newOperands << tmp - else - newOperands << operand - end - } - newList << Instruction.new(node.codeOrigin, node.opcode, newOperands, node.annotation) - else - newList << node - end - else - newList << node - end - } - newList -end - -# -# Lowering of malformed immediates except when used in a "move" instruction. -# For example: -# -# addp 642641, foo -# -# will become: -# -# move 642641, tmp -# addp tmp, foo -# - -class Node - def armV7LowerMalformedImmediatesRecurse(list) - mapChildren { - | node | - node.armV7LowerMalformedImmediatesRecurse(list) - } - end -end - -class Address - def armV7LowerMalformedImmediatesRecurse(list) - self - end -end - -class BaseIndex - def armV7LowerMalformedImmediatesRecurse(list) - self - end -end - -class AbsoluteAddress - def armV7LowerMalformedImmediatesRecurse(list) - self - end -end - -class Immediate - def armV7LowerMalformedImmediatesRecurse(list) - if value < 0 or value > 255 - tmp = Tmp.new(codeOrigin, :gpr) - list << Instruction.new(codeOrigin, "move", [self, tmp]) - tmp - else - self - end - end -end - -def armV7LowerMalformedImmediates(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - annotation = node.annotation - case node.opcode - when "move" - newList << node - when "addi", "addp", "addis", "subi", "subp", "subis" - if node.operands[0].is_a? Immediate and - node.operands[0].value < 0 and - node.operands[0].value >= 255 and - node.operands.size == 2 - if node.opcode =~ /add/ - newOpcode = "sub" + node.opcode[-1..-1] - else - newOpcode = "add" + node.opcode[-1..-1] - end - newList << Instruction.new(node.codeOrigin, newOpcode, - [Immediate.new(-node.operands[0].value)] + node.operands[1..-1], - annotation) - else - newList << node.armV7LowerMalformedImmediatesRecurse(newList) - end - when "muli", "mulp" - if node.operands[0].is_a? Immediate - tmp = Tmp.new(codeOrigin, :gpr) - newList << Instruction.new(node.codeOrigin, "move", [node.operands[0], tmp], annotation) - newList << Instruction.new(node.codeOrigin, "muli", [tmp] + node.operands[1..-1]) - else - newList << node.armV7LowerMalformedImmediatesRecurse(newList) - end - else - newList << node.armV7LowerMalformedImmediatesRecurse(newList) - end - else - newList << node - end - } - newList -end - -# -# Lowering of misplaced addresses. For example: -# -# addi foo, [bar] -# -# will become: -# -# loadi [bar], tmp -# addi foo, tmp -# storei tmp, [bar] -# -# Another example: -# -# addi [foo], bar -# -# will become: -# -# loadi [foo], tmp -# addi tmp, bar -# - -def armV7AsRegister(preList, postList, operand, suffix, needStore) - return operand unless operand.address? - - tmp = Tmp.new(operand.codeOrigin, if suffix == "d" then :fpr else :gpr end) - preList << Instruction.new(operand.codeOrigin, "load" + suffix, [operand, tmp]) - if needStore - postList << Instruction.new(operand.codeOrigin, "store" + suffix, [tmp, operand]) - end - tmp -end - -def armV7AsRegisters(preList, postList, operands, suffix) - newOperands = [] - operands.each_with_index { - | operand, index | - newOperands << armV7AsRegister(preList, postList, operand, suffix, index == operands.size - 1) - } - newOperands -end - -def armV7LowerMisplacedAddresses(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - postInstructions = [] - annotation = node.annotation - case node.opcode - when "addi", "addp", "addis", "andi", "andp", "lshifti", "lshiftp", "muli", "mulp", "negi", - "negp", "noti", "ori", "oris", "orp", "rshifti", "urshifti", "rshiftp", "urshiftp", "subi", - "subp", "subis", "xori", "xorp", /^bi/, /^bp/, /^bti/, /^btp/, /^ci/, /^cp/, /^ti/ - newList << Instruction.new(node.codeOrigin, - node.opcode, - armV7AsRegisters(newList, postInstructions, node.operands, "i"), - annotation) - when "bbeq", "bbneq", "bba", "bbaeq", "bbb", "bbbeq", "btbz", "btbnz", "tbz", "tbnz", - "cbeq", "cbneq", "cba", "cbaeq", "cbb", "cbbeq" - newList << Instruction.new(node.codeOrigin, - node.opcode, - armV7AsRegisters(newList, postInstructions, node.operands, "b"), - annotation) - when "bbgt", "bbgteq", "bblt", "bblteq", "btbs", "tbs", "cbgt", "cbgteq", "cblt", "cblteq" - newList << Instruction.new(node.codeOrigin, - node.opcode, - armV7AsRegisters(newList, postInstructions, node.operands, "bs"), - annotation) - when "addd", "divd", "subd", "muld", "sqrtd", /^bd/ - newList << Instruction.new(node.codeOrigin, - node.opcode, - armV7AsRegisters(newList, postInstructions, node.operands, "d"), - annotation) - when "jmp", "call" - newList << Instruction.new(node.codeOrigin, - node.opcode, - [armV7AsRegister(newList, postInstructions, node.operands[0], "p", false)], - annotation) - else - newList << node - end - newList += postInstructions - else - newList << node - end - } - newList -end - -# -# Lowering of register reuse in compare instructions. For example: -# -# cieq t0, t1, t0 -# -# will become: -# -# mov tmp, t0 -# cieq tmp, t1, t0 -# - -def armV7LowerRegisterReuse(list) - newList = [] - list.each { - | node | - if node.is_a? Instruction - annotation = node.annotation - case node.opcode - when "cieq", "cineq", "cia", "ciaeq", "cib", "cibeq", "cigt", "cigteq", "cilt", "cilteq", - "cpeq", "cpneq", "cpa", "cpaeq", "cpb", "cpbeq", "cpgt", "cpgteq", "cplt", "cplteq", - "tis", "tiz", "tinz", "tbs", "tbz", "tbnz", "tps", "tpz", "tpnz", "cbeq", "cbneq", - "cba", "cbaeq", "cbb", "cbbeq", "cbgt", "cbgteq", "cblt", "cblteq" - if node.operands.size == 2 - if node.operands[0] == node.operands[1] - tmp = Tmp.new(node.codeOrigin, :gpr) - newList << Instruction.new(node.codeOrigin, "move", [node.operands[0], tmp], annotation) - newList << Instruction.new(node.codeOrigin, node.opcode, [tmp, node.operands[1]]) - else - newList << node - end - else - raise "Wrong number of arguments at #{node.codeOriginString}" unless node.operands.size == 3 - if node.operands[0] == node.operands[2] - tmp = Tmp.new(node.codeOrigin, :gpr) - newList << Instruction.new(node.codeOrigin, "move", [node.operands[0], tmp], annotation) - newList << Instruction.new(node.codeOrigin, node.opcode, [tmp, node.operands[1], node.operands[2]]) - elsif node.operands[1] == node.operands[2] - tmp = Tmp.new(node.codeOrigin, :gpr) - newList << Instruction.new(node.codeOrigin, "move", [node.operands[1], tmp], annotation) - newList << Instruction.new(node.codeOrigin, node.opcode, [node.operands[0], tmp, node.operands[2]]) - else - newList << node - end - end - else - newList << node - end - else - newList << node - end - } - newList -end - -# # Lea support. # @@ -642,31 +162,28 @@ end class Sequence def getModifiedListARMv7 - myList = @list - - # Verify that we will only see instructions and labels. - myList.each { - | node | - unless node.is_a? Instruction or - node.is_a? Label or - node.is_a? LocalLabel or - node.is_a? Skip - raise "Unexpected #{node.inspect} at #{node.codeOrigin}" + result = @list + result = riscLowerSimpleBranchOps(result) + result = riscLowerHardBranchOps(result) + result = riscLowerShiftOps(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 } - - myList = armV7LowerBranchOps(myList) - myList = armV7LowerShiftOps(myList) - myList = armV7LowerMalformedAddresses(myList) - myList = armV7LowerMalformedAddressesDouble(myList) - myList = armV7LowerMisplacedImmediates(myList) - myList = armV7LowerMalformedImmediates(myList) - myList = armV7LowerMisplacedAddresses(myList) - myList = armV7LowerRegisterReuse(myList) - myList = assignRegistersToTemporaries(myList, :gpr, ARMv7_EXTRA_GPRS) - myList = assignRegistersToTemporaries(myList, :fpr, ARMv7_EXTRA_FPRS) - - return myList + result = riscLowerMalformedAddressesDouble(result) + result = riscLowerMisplacedImmediates(result) + result = riscLowerMalformedImmediates(result, 0..0xff) + result = riscLowerMisplacedAddresses(result) + result = riscLowerRegisterReuse(result) + result = assignRegistersToTemporaries(result, :gpr, ARMv7_EXTRA_GPRS) + result = assignRegistersToTemporaries(result, :fpr, ARMv7_EXTRA_FPRS) + return result end end @@ -747,8 +264,8 @@ class Instruction $asm.annotation annotation if $enableInstrAnnotations case opcode - when "addi", "addp", "addis" - if opcode == "addis" + when "addi", "addp", "addis", "addps" + if opcode == "addis" or opcode == "addps" suffix = "s" else suffix = "" @@ -837,7 +354,7 @@ class Instruction $asm.puts "vcmpe.f64 #{armV7Operands(operands[0..1])}" $asm.puts "vmrs apsr_nzcv, fpscr" isUnordered = LocalLabel.unique("bdneq") - $asm.puts "bvs #{LabelReference.new(codeOrigin, isUnordered).asmLabel}" + $asm.puts "bvs #{LocalLabelReference.new(codeOrigin, isUnordered).asmLabel}" $asm.puts "bne #{operands[2].asmLabel}" isUnordered.lower("ARMv7") when "bdgt" |