ppc64

const (
	// For genstub, the type of stub required by the caller.
	STUB_TOC = iota
	STUB_PCREL
)

const (
	OP_TOCRESTORE    = 0xe8410018 // ld r2,24(r1)
	OP_TOCSAVE       = 0xf8410018 // std r2,24(r1)
	OP_NOP           = 0x60000000 // nop
	OP_BL            = 0x48000001 // bl 0
	OP_BCTR          = 0x4e800420 // bctr
	OP_BCTRL         = 0x4e800421 // bctrl
	OP_BCL           = 0x40000001 // bcl
	OP_ADDI          = 0x38000000 // addi
	OP_ADDIS         = 0x3c000000 // addis
	OP_LD            = 0xe8000000 // ld
	OP_PLA_PFX       = 0x06100000 // pla (prefix instruction word)
	OP_PLA_SFX       = 0x38000000 // pla (suffix instruction word)
	OP_PLD_PFX_PCREL = 0x04100000 // pld (prefix instruction word, R=1)
	OP_PLD_SFX       = 0xe4000000 // pld (suffix instruction word)
	OP_MFLR          = 0x7c0802a6 // mflr
	OP_MTLR          = 0x7c0803a6 // mtlr
	OP_MFCTR         = 0x7c0902a6 // mfctr
	OP_MTCTR         = 0x7c0903a6 // mtctr

	OP_ADDIS_R12_R2  = OP_ADDIS | 12<<21 | 2<<16  // addis r12,r2,0
	OP_ADDIS_R12_R12 = OP_ADDIS | 12<<21 | 12<<16 // addis  r12,r12,0
	OP_ADDI_R12_R12  = OP_ADDI | 12<<21 | 12<<16  // addi  r12,r12,0
	OP_PLD_SFX_R12   = OP_PLD_SFX | 12<<21        // pld   r12,0 (suffix instruction word)
	OP_PLA_SFX_R12   = OP_PLA_SFX | 12<<21        // pla   r12,0 (suffix instruction word)
	OP_LIS_R12       = OP_ADDIS | 12<<21          // lis r12,0
	OP_LD_R12_R12    = OP_LD | 12<<21 | 12<<16    // ld r12,0(r12)
	OP_MTCTR_R12     = OP_MTCTR | 12<<21          // mtctr r12
	OP_MFLR_R12      = OP_MFLR | 12<<21           // mflr r12
	OP_MFLR_R0       = OP_MFLR | 0<<21            // mflr r0
	OP_MTLR_R0       = OP_MTLR | 0<<21            // mtlr r0

	// This is a special, preferred form of bcl to obtain the next
	// instruction address (NIA, aka PC+4) in LR.
	OP_BCL_NIA = OP_BCL | 20<<21 | 31<<16 | 1<<2 // bcl 20,31,$+4

	// Masks to match opcodes
	MASK_PLD_PFX  = 0xfff70000
	MASK_PLD_SFX  = 0xfc1f0000 // Also checks RA = 0 if check value is OP_PLD_SFX.
	MASK_PLD_RT   = 0x03e00000 // Extract RT from the pld suffix.
	MASK_OP_LD    = 0xfc000003
	MASK_OP_ADDIS = 0xfc000000
)