arm

Documentation

Index

• Constants
• Variables
• func DRconv(a int) string
• func Rconv(r int) string
• type Opcross
• type Oprang
• type Optab
• Bugs

Constants

const (
	NSNAME = 8
	NSYM   = 50
	NREG   = 16
)

const (
	REG_R0 = obj.RBaseARM + iota // must be 16-aligned
	REG_R1
	REG_R2
	REG_R3
	REG_R4
	REG_R5
	REG_R6
	REG_R7
	REG_R8
	REG_R9
	REG_R10
	REG_R11
	REG_R12
	REG_R13
	REG_R14
	REG_R15

	REG_F0 // must be 16-aligned
	REG_F1
	REG_F2
	REG_F3
	REG_F4
	REG_F5
	REG_F6
	REG_F7
	REG_F8
	REG_F9
	REG_F10
	REG_F11
	REG_F12
	REG_F13
	REG_F14
	REG_F15

	REG_FPSR // must be 2-aligned
	REG_FPCR

	REG_CPSR // must be 2-aligned
	REG_SPSR

	MAXREG
	REGRET = REG_R0
	/* compiler allocates R1 up as temps */
	/* compiler allocates register variables R3 up */
	/* compiler allocates external registers R10 down */
	REGEXT = REG_R10
	/* these two registers are declared in runtime.h */
	REGG = REGEXT - 0
	REGM = REGEXT - 1

	REGCTXT = REG_R7
	REGTMP  = REG_R11
	REGSP   = REG_R13
	REGLINK = REG_R14
	REGPC   = REG_R15

	NFREG = 16
	/* compiler allocates register variables F0 up */
	/* compiler allocates external registers F7 down */
	FREGRET = REG_F0
	FREGEXT = REG_F7
	FREGTMP = REG_F15
)

const (
	C_NONE = iota
	C_REG
	C_REGREG
	C_REGREG2
	C_REGLIST
	C_SHIFT
	C_FREG
	C_PSR
	C_FCR

	C_RCON /* 0xff rotated */
	C_NCON /* ~RCON */
	C_SCON /* 0xffff */
	C_LCON
	C_LCONADDR
	C_ZFCON
	C_SFCON
	C_LFCON

	C_RACON
	C_LACON

	C_SBRA
	C_LBRA

	C_HAUTO  /* halfword insn offset (-0xff to 0xff) */
	C_FAUTO  /* float insn offset (0 to 0x3fc, word aligned) */
	C_HFAUTO /* both H and F */
	C_SAUTO  /* -0xfff to 0xfff */
	C_LAUTO

	C_HOREG
	C_FOREG
	C_HFOREG
	C_SOREG
	C_ROREG
	C_SROREG /* both nil and R */
	C_LOREG

	C_PC
	C_SP
	C_HREG

	C_ADDR /* reference to relocatable address */
	C_TEXTSIZE

	C_GOK

	C_NCLASS /* must be the last */
)

const (
	AAND = obj.ABaseARM + obj.A_ARCHSPECIFIC + iota
	AEOR
	ASUB
	ARSB
	AADD
	AADC
	ASBC
	ARSC
	ATST
	ATEQ
	ACMP
	ACMN
	AORR
	ABIC

	AMVN

	/*
	 * Do not reorder or fragment the conditional branch
	 * opcodes, or the predication code will break
	 */
	ABEQ
	ABNE
	ABCS
	ABHS
	ABCC
	ABLO
	ABMI
	ABPL
	ABVS
	ABVC
	ABHI
	ABLS
	ABGE
	ABLT
	ABGT
	ABLE

	AMOVWD
	AMOVWF
	AMOVDW
	AMOVFW
	AMOVFD
	AMOVDF
	AMOVF
	AMOVD

	ACMPF
	ACMPD
	AADDF
	AADDD
	ASUBF
	ASUBD
	AMULF
	AMULD
	ADIVF
	ADIVD
	ASQRTF
	ASQRTD
	AABSF
	AABSD

	ASRL
	ASRA
	ASLL
	AMULU
	ADIVU
	AMUL
	ADIV
	AMOD
	AMODU

	AMOVB
	AMOVBS
	AMOVBU
	AMOVH
	AMOVHS
	AMOVHU
	AMOVW
	AMOVM
	ASWPBU
	ASWPW

	ARFE
	ASWI
	AMULA

	AWORD
	ABCASE
	ACASE

	AMULL
	AMULAL
	AMULLU
	AMULALU

	ABX
	ABXRET
	ADWORD

	ALDREX
	ASTREX
	ALDREXD
	ASTREXD

	APLD

	ACLZ

	AMULWT
	AMULWB
	AMULAWT
	AMULAWB

	ADATABUNDLE
	ADATABUNDLEEND

	AMRC // MRC/MCR

	ALAST

	// aliases
	AB  = obj.AJMP
	ABL = obj.ACALL
)

const (
	C_SCOND = (1 << 4) - 1
	C_SBIT  = 1 << 4
	C_PBIT  = 1 << 5
	C_WBIT  = 1 << 6
	C_FBIT  = 1 << 7 /* psr flags-only */
	C_UBIT  = 1 << 7 /* up bit, unsigned bit */

	// These constants are the ARM condition codes encodings,
	// XORed with 14 so that C_SCOND_NONE has value 0,
	// so that a zeroed Prog.scond means "always execute".
	C_SCOND_XOR = 14

	C_SCOND_EQ   = 0 ^ C_SCOND_XOR
	C_SCOND_NE   = 1 ^ C_SCOND_XOR
	C_SCOND_HS   = 2 ^ C_SCOND_XOR
	C_SCOND_LO   = 3 ^ C_SCOND_XOR
	C_SCOND_MI   = 4 ^ C_SCOND_XOR
	C_SCOND_PL   = 5 ^ C_SCOND_XOR
	C_SCOND_VS   = 6 ^ C_SCOND_XOR
	C_SCOND_VC   = 7 ^ C_SCOND_XOR
	C_SCOND_HI   = 8 ^ C_SCOND_XOR
	C_SCOND_LS   = 9 ^ C_SCOND_XOR
	C_SCOND_GE   = 10 ^ C_SCOND_XOR
	C_SCOND_LT   = 11 ^ C_SCOND_XOR
	C_SCOND_GT   = 12 ^ C_SCOND_XOR
	C_SCOND_LE   = 13 ^ C_SCOND_XOR
	C_SCOND_NONE = 14 ^ C_SCOND_XOR
	C_SCOND_NV   = 15 ^ C_SCOND_XOR

	/* D_SHIFT type */
	SHIFT_LL = 0 << 5
	SHIFT_LR = 1 << 5
	SHIFT_AR = 2 << 5
	SHIFT_RR = 3 << 5
)

scond byte

const (
	LFROM  = 1 << 0
	LTO    = 1 << 1
	LPOOL  = 1 << 2
	LPCREL = 1 << 3
)

const (
	FOLL  = 1 << 0
	LABEL = 1 << 1
	LEAF  = 1 << 2
)

Prog.mark

const (
	REGARG = -1
)

-1 disables use of REGARG

Variables

var Anames = []string{
	obj.A_ARCHSPECIFIC: "AND",
	"EOR",
	"SUB",
	"RSB",
	"ADD",
	"ADC",
	"SBC",
	"RSC",
	"TST",
	"TEQ",
	"CMP",
	"CMN",
	"ORR",
	"BIC",
	"MVN",
	"BEQ",
	"BNE",
	"BCS",
	"BHS",
	"BCC",
	"BLO",
	"BMI",
	"BPL",
	"BVS",
	"BVC",
	"BHI",
	"BLS",
	"BGE",
	"BLT",
	"BGT",
	"BLE",
	"MOVWD",
	"MOVWF",
	"MOVDW",
	"MOVFW",
	"MOVFD",
	"MOVDF",
	"MOVF",
	"MOVD",
	"CMPF",
	"CMPD",
	"ADDF",
	"ADDD",
	"SUBF",
	"SUBD",
	"MULF",
	"MULD",
	"DIVF",
	"DIVD",
	"SQRTF",
	"SQRTD",
	"ABSF",
	"ABSD",
	"SRL",
	"SRA",
	"SLL",
	"MULU",
	"DIVU",
	"MUL",
	"DIV",
	"MOD",
	"MODU",
	"MOVB",
	"MOVBS",
	"MOVBU",
	"MOVH",
	"MOVHS",
	"MOVHU",
	"MOVW",
	"MOVM",
	"SWPBU",
	"SWPW",
	"RFE",
	"SWI",
	"MULA",
	"WORD",
	"BCASE",
	"CASE",
	"MULL",
	"MULAL",
	"MULLU",
	"MULALU",
	"BX",
	"BXRET",
	"DWORD",
	"LDREX",
	"STREX",
	"LDREXD",
	"STREXD",
	"PLD",
	"CLZ",
	"MULWT",
	"MULWB",
	"MULAWT",
	"MULAWB",
	"DATABUNDLE",
	"DATABUNDLEEND",
	"MRC",
	"LAST",
}

var Linkarm = obj.LinkArch{
	ByteOrder:  binary.LittleEndian,
	Name:       "arm",
	Thechar:    '5',
	Preprocess: preprocess,
	Assemble:   span5,
	Follow:     follow,
	Progedit:   progedit,
	UnaryDst:   unaryDst,
	Minlc:      4,
	Ptrsize:    4,
	Regsize:    4,
}

Functions

func DRconv

func DRconv(a int) string

func Rconv

func Rconv(r int) string

Types

type Opcross

type Opcross [32][2][32]uint8

type Oprang

type Oprang struct {
	// contains filtered or unexported fields
}

type Optab

type Optab struct {
	// contains filtered or unexported fields
}

Notes

Bugs

• how to correctly handle line number for constant pool entries? for now, we set line number to the last instruction preceding them at least this won't bloat the .debug_line tables