Use mod vendor for vendored directory (backwards compatible)

1 files changed, 0 insertions, 1055 deletions

diff --git a/vendor/github.com/google/gops/internal/obj/arm/obj5.go b/vendor/github.com/google/gops/internal/obj/arm/obj5.go
deleted file mode 100644
index 2c4e39b7..00000000
--- a/vendor/github.com/google/gops/internal/obj/arm/obj5.go
+++ /dev/null
@@ -1,1055 +0,0 @@
-// Derived from Inferno utils/5c/swt.c
-// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5c/swt.c
-//
-//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
-//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
-//	Portions Copyright © 1997-1999 Vita Nuova Limited
-//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
-//	Portions Copyright © 2004,2006 Bruce Ellis
-//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
-//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
-//	Portions Copyright © 2009 The Go Authors. All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-package arm
-
-import (
-	"fmt"
-	"log"
-	"math"
-
-	"github.com/google/gops/internal/obj"
-	"github.com/google/gops/internal/sys"
-)
-
-var progedit_tlsfallback *obj.LSym
-
-func progedit(ctxt *obj.Link, p *obj.Prog) {
-	p.From.Class = 0
-	p.To.Class = 0
-
-	// Rewrite B/BL to symbol as TYPE_BRANCH.
-	switch p.As {
-	case AB,
-		ABL,
-		obj.ADUFFZERO,
-		obj.ADUFFCOPY:
-		if p.To.Type == obj.TYPE_MEM && (p.To.Name == obj.NAME_EXTERN || p.To.Name == obj.NAME_STATIC) && p.To.Sym != nil {
-			p.To.Type = obj.TYPE_BRANCH
-		}
-	}
-
-	// Replace TLS register fetches on older ARM processors.
-	switch p.As {
-	// Treat MRC 15, 0, <reg>, C13, C0, 3 specially.
-	case AMRC:
-		if p.To.Offset&0xffff0fff == 0xee1d0f70 {
-			// Because the instruction might be rewritten to a BL which returns in R0
-			// the register must be zero.
-			if p.To.Offset&0xf000 != 0 {
-				ctxt.Diag("%v: TLS MRC instruction must write to R0 as it might get translated into a BL instruction", p.Line())
-			}
-
-			if obj.GOARM < 7 {
-				// Replace it with BL runtime.read_tls_fallback(SB) for ARM CPUs that lack the tls extension.
-				if progedit_tlsfallback == nil {
-					progedit_tlsfallback = obj.Linklookup(ctxt, "runtime.read_tls_fallback", 0)
-				}
-
-				// MOVW	LR, R11
-				p.As = AMOVW
-
-				p.From.Type = obj.TYPE_REG
-				p.From.Reg = REGLINK
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REGTMP
-
-				// BL	runtime.read_tls_fallback(SB)
-				p = obj.Appendp(ctxt, p)
-
-				p.As = ABL
-				p.To.Type = obj.TYPE_BRANCH
-				p.To.Sym = progedit_tlsfallback
-				p.To.Offset = 0
-
-				// MOVW	R11, LR
-				p = obj.Appendp(ctxt, p)
-
-				p.As = AMOVW
-				p.From.Type = obj.TYPE_REG
-				p.From.Reg = REGTMP
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REGLINK
-				break
-			}
-		}
-
-		// Otherwise, MRC/MCR instructions need no further treatment.
-		p.As = AWORD
-	}
-
-	// Rewrite float constants to values stored in memory.
-	switch p.As {
-	case AMOVF:
-		if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
-			f32 := float32(p.From.Val.(float64))
-			i32 := math.Float32bits(f32)
-			literal := fmt.Sprintf("$f32.%08x", i32)
-			s := obj.Linklookup(ctxt, literal, 0)
-			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Name = obj.NAME_EXTERN
-			p.From.Offset = 0
-		}
-
-	case AMOVD:
-		if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
-			i64 := math.Float64bits(p.From.Val.(float64))
-			literal := fmt.Sprintf("$f64.%016x", i64)
-			s := obj.Linklookup(ctxt, literal, 0)
-			p.From.Type = obj.TYPE_MEM
-			p.From.Sym = s
-			p.From.Name = obj.NAME_EXTERN
-			p.From.Offset = 0
-		}
-	}
-
-	if ctxt.Flag_dynlink {
-		rewriteToUseGot(ctxt, p)
-	}
-}
-
-// Rewrite p, if necessary, to access global data via the global offset table.
-func rewriteToUseGot(ctxt *obj.Link, p *obj.Prog) {
-	if p.As == obj.ADUFFCOPY || p.As == obj.ADUFFZERO {
-		//     ADUFFxxx $offset
-		// becomes
-		//     MOVW runtime.duffxxx@GOT, R9
-		//     ADD $offset, R9
-		//     CALL (R9)
-		var sym *obj.LSym
-		if p.As == obj.ADUFFZERO {
-			sym = obj.Linklookup(ctxt, "runtime.duffzero", 0)
-		} else {
-			sym = obj.Linklookup(ctxt, "runtime.duffcopy", 0)
-		}
-		offset := p.To.Offset
-		p.As = AMOVW
-		p.From.Type = obj.TYPE_MEM
-		p.From.Name = obj.NAME_GOTREF
-		p.From.Sym = sym
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R9
-		p.To.Name = obj.NAME_NONE
-		p.To.Offset = 0
-		p.To.Sym = nil
-		p1 := obj.Appendp(ctxt, p)
-		p1.As = AADD
-		p1.From.Type = obj.TYPE_CONST
-		p1.From.Offset = offset
-		p1.To.Type = obj.TYPE_REG
-		p1.To.Reg = REG_R9
-		p2 := obj.Appendp(ctxt, p1)
-		p2.As = obj.ACALL
-		p2.To.Type = obj.TYPE_MEM
-		p2.To.Reg = REG_R9
-		return
-	}
-
-	// We only care about global data: NAME_EXTERN means a global
-	// symbol in the Go sense, and p.Sym.Local is true for a few
-	// internally defined symbols.
-	if p.From.Type == obj.TYPE_ADDR && p.From.Name == obj.NAME_EXTERN && !p.From.Sym.Local() {
-		// MOVW $sym, Rx becomes MOVW sym@GOT, Rx
-		// MOVW $sym+<off>, Rx becomes MOVW sym@GOT, Rx; ADD <off>, Rx
-		if p.As != AMOVW {
-			ctxt.Diag("do not know how to handle TYPE_ADDR in %v with -dynlink", p)
-		}
-		if p.To.Type != obj.TYPE_REG {
-			ctxt.Diag("do not know how to handle LEAQ-type insn to non-register in %v with -dynlink", p)
-		}
-		p.From.Type = obj.TYPE_MEM
-		p.From.Name = obj.NAME_GOTREF
-		if p.From.Offset != 0 {
-			q := obj.Appendp(ctxt, p)
-			q.As = AADD
-			q.From.Type = obj.TYPE_CONST
-			q.From.Offset = p.From.Offset
-			q.To = p.To
-			p.From.Offset = 0
-		}
-	}
-	if p.From3 != nil && p.From3.Name == obj.NAME_EXTERN {
-		ctxt.Diag("don't know how to handle %v with -dynlink", p)
-	}
-	var source *obj.Addr
-	// MOVx sym, Ry becomes MOVW sym@GOT, R9; MOVx (R9), Ry
-	// MOVx Ry, sym becomes MOVW sym@GOT, R9; MOVx Ry, (R9)
-	// An addition may be inserted between the two MOVs if there is an offset.
-	if p.From.Name == obj.NAME_EXTERN && !p.From.Sym.Local() {
-		if p.To.Name == obj.NAME_EXTERN && !p.To.Sym.Local() {
-			ctxt.Diag("cannot handle NAME_EXTERN on both sides in %v with -dynlink", p)
-		}
-		source = &p.From
-	} else if p.To.Name == obj.NAME_EXTERN && !p.To.Sym.Local() {
-		source = &p.To
-	} else {
-		return
-	}
-	if p.As == obj.ATEXT || p.As == obj.AFUNCDATA || p.As == obj.ACALL || p.As == obj.ARET || p.As == obj.AJMP {
-		return
-	}
-	if source.Sym.Type == obj.STLSBSS {
-		return
-	}
-	if source.Type != obj.TYPE_MEM {
-		ctxt.Diag("don't know how to handle %v with -dynlink", p)
-	}
-	p1 := obj.Appendp(ctxt, p)
-	p2 := obj.Appendp(ctxt, p1)
-
-	p1.As = AMOVW
-	p1.From.Type = obj.TYPE_MEM
-	p1.From.Sym = source.Sym
-	p1.From.Name = obj.NAME_GOTREF
-	p1.To.Type = obj.TYPE_REG
-	p1.To.Reg = REG_R9
-
-	p2.As = p.As
-	p2.From = p.From
-	p2.To = p.To
-	if p.From.Name == obj.NAME_EXTERN {
-		p2.From.Reg = REG_R9
-		p2.From.Name = obj.NAME_NONE
-		p2.From.Sym = nil
-	} else if p.To.Name == obj.NAME_EXTERN {
-		p2.To.Reg = REG_R9
-		p2.To.Name = obj.NAME_NONE
-		p2.To.Sym = nil
-	} else {
-		return
-	}
-	obj.Nopout(p)
-}
-
-// Prog.mark
-const (
-	FOLL  = 1 << 0
-	LABEL = 1 << 1
-	LEAF  = 1 << 2
-)
-
-func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
-	autosize := int32(0)
-
-	ctxt.Cursym = cursym
-
-	if cursym.Text == nil || cursym.Text.Link == nil {
-		return
-	}
-
-	softfloat(ctxt, cursym)
-
-	p := cursym.Text
-	autoffset := int32(p.To.Offset)
-	if autoffset < 0 {
-		autoffset = 0
-	}
-	cursym.Locals = autoffset
-	cursym.Args = p.To.Val.(int32)
-
-	/*
-	 * find leaf subroutines
-	 * strip NOPs
-	 * expand RET
-	 * expand BECOME pseudo
-	 */
-	var q1 *obj.Prog
-	var q *obj.Prog
-	for p := cursym.Text; p != nil; p = p.Link {
-		switch p.As {
-		case obj.ATEXT:
-			p.Mark |= LEAF
-
-		case obj.ARET:
-			break
-
-		case ADIV, ADIVU, AMOD, AMODU:
-			q = p
-			if ctxt.Sym_div == nil {
-				initdiv(ctxt)
-			}
-			cursym.Text.Mark &^= LEAF
-			continue
-
-		case obj.ANOP:
-			q1 = p.Link
-			q.Link = q1 /* q is non-nop */
-			if q1 != nil {
-				q1.Mark |= p.Mark
-			}
-			continue
-
-		case ABL,
-			ABX,
-			obj.ADUFFZERO,
-			obj.ADUFFCOPY:
-			cursym.Text.Mark &^= LEAF
-			fallthrough
-
-		case AB,
-			ABEQ,
-			ABNE,
-			ABCS,
-			ABHS,
-			ABCC,
-			ABLO,
-			ABMI,
-			ABPL,
-			ABVS,
-			ABVC,
-			ABHI,
-			ABLS,
-			ABGE,
-			ABLT,
-			ABGT,
-			ABLE:
-			q1 = p.Pcond
-			if q1 != nil {
-				for q1.As == obj.ANOP {
-					q1 = q1.Link
-					p.Pcond = q1
-				}
-			}
-		}
-
-		q = p
-	}
-
-	var p1 *obj.Prog
-	var p2 *obj.Prog
-	var q2 *obj.Prog
-	for p := cursym.Text; p != nil; p = p.Link {
-		o := p.As
-		switch o {
-		case obj.ATEXT:
-			autosize = int32(p.To.Offset + 4)
-			if autosize <= 4 {
-				if cursym.Text.Mark&LEAF != 0 {
-					p.To.Offset = -4
-					autosize = 0
-				}
-			}
-
-			if autosize == 0 && cursym.Text.Mark&LEAF == 0 {
-				if ctxt.Debugvlog != 0 {
-					ctxt.Logf("save suppressed in: %s\n", cursym.Name)
-				}
-
-				cursym.Text.Mark |= LEAF
-			}
-
-			if cursym.Text.Mark&LEAF != 0 {
-				cursym.Set(obj.AttrLeaf, true)
-				if autosize == 0 {
-					break
-				}
-			}
-
-			if p.From3.Offset&obj.NOSPLIT == 0 {
-				p = stacksplit(ctxt, p, autosize) // emit split check
-			}
-
-			// MOVW.W		R14,$-autosize(SP)
-			p = obj.Appendp(ctxt, p)
-
-			p.As = AMOVW
-			p.Scond |= C_WBIT
-			p.From.Type = obj.TYPE_REG
-			p.From.Reg = REGLINK
-			p.To.Type = obj.TYPE_MEM
-			p.To.Offset = int64(-autosize)
-			p.To.Reg = REGSP
-			p.Spadj = autosize
-
-			if cursym.Text.From3.Offset&obj.WRAPPER != 0 {
-				// if(g->panic != nil && g->panic->argp == FP) g->panic->argp = bottom-of-frame
-				//
-				//	MOVW g_panic(g), R1
-				//	CMP $0, R1
-				//	B.EQ end
-				//	MOVW panic_argp(R1), R2
-				//	ADD $(autosize+4), R13, R3
-				//	CMP R2, R3
-				//	B.NE end
-				//	ADD $4, R13, R4
-				//	MOVW R4, panic_argp(R1)
-				// end:
-				//	NOP
-				//
-				// The NOP is needed to give the jumps somewhere to land.
-				// It is a liblink NOP, not an ARM NOP: it encodes to 0 instruction bytes.
-
-				p = obj.Appendp(ctxt, p)
-
-				p.As = AMOVW
-				p.From.Type = obj.TYPE_MEM
-				p.From.Reg = REGG
-				p.From.Offset = 4 * int64(ctxt.Arch.PtrSize) // G.panic
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REG_R1
-
-				p = obj.Appendp(ctxt, p)
-				p.As = ACMP
-				p.From.Type = obj.TYPE_CONST
-				p.From.Offset = 0
-				p.Reg = REG_R1
-
-				p = obj.Appendp(ctxt, p)
-				p.As = ABEQ
-				p.To.Type = obj.TYPE_BRANCH
-				p1 = p
-
-				p = obj.Appendp(ctxt, p)
-				p.As = AMOVW
-				p.From.Type = obj.TYPE_MEM
-				p.From.Reg = REG_R1
-				p.From.Offset = 0 // Panic.argp
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REG_R2
-
-				p = obj.Appendp(ctxt, p)
-				p.As = AADD
-				p.From.Type = obj.TYPE_CONST
-				p.From.Offset = int64(autosize) + 4
-				p.Reg = REG_R13
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REG_R3
-
-				p = obj.Appendp(ctxt, p)
-				p.As = ACMP
-				p.From.Type = obj.TYPE_REG
-				p.From.Reg = REG_R2
-				p.Reg = REG_R3
-
-				p = obj.Appendp(ctxt, p)
-				p.As = ABNE
-				p.To.Type = obj.TYPE_BRANCH
-				p2 = p
-
-				p = obj.Appendp(ctxt, p)
-				p.As = AADD
-				p.From.Type = obj.TYPE_CONST
-				p.From.Offset = 4
-				p.Reg = REG_R13
-				p.To.Type = obj.TYPE_REG
-				p.To.Reg = REG_R4
-
-				p = obj.Appendp(ctxt, p)
-				p.As = AMOVW
-				p.From.Type = obj.TYPE_REG
-				p.From.Reg = REG_R4
-				p.To.Type = obj.TYPE_MEM
-				p.To.Reg = REG_R1
-				p.To.Offset = 0 // Panic.argp
-
-				p = obj.Appendp(ctxt, p)
-
-				p.As = obj.ANOP
-				p1.Pcond = p
-				p2.Pcond = p
-			}
-
-		case obj.ARET:
-			nocache(p)
-			if cursym.Text.Mark&LEAF != 0 {
-				if autosize == 0 {
-					p.As = AB
-					p.From = obj.Addr{}
-					if p.To.Sym != nil { // retjmp
-						p.To.Type = obj.TYPE_BRANCH
-					} else {
-						p.To.Type = obj.TYPE_MEM
-						p.To.Offset = 0
-						p.To.Reg = REGLINK
-					}
-
-					break
-				}
-			}
-
-			p.As = AMOVW
-			p.Scond |= C_PBIT
-			p.From.Type = obj.TYPE_MEM
-			p.From.Offset = int64(autosize)
-			p.From.Reg = REGSP
-			p.To.Type = obj.TYPE_REG
-			p.To.Reg = REGPC
-
-			// If there are instructions following
-			// this ARET, they come from a branch
-			// with the same stackframe, so no spadj.
-			if p.To.Sym != nil { // retjmp
-				p.To.Reg = REGLINK
-				q2 = obj.Appendp(ctxt, p)
-				q2.As = AB
-				q2.To.Type = obj.TYPE_BRANCH
-				q2.To.Sym = p.To.Sym
-				p.To.Sym = nil
-				p = q2
-			}
-
-		case AADD:
-			if p.From.Type == obj.TYPE_CONST && p.From.Reg == 0 && p.To.Type == obj.TYPE_REG && p.To.Reg == REGSP {
-				p.Spadj = int32(-p.From.Offset)
-			}
-
-		case ASUB:
-			if p.From.Type == obj.TYPE_CONST && p.From.Reg == 0 && p.To.Type == obj.TYPE_REG && p.To.Reg == REGSP {
-				p.Spadj = int32(p.From.Offset)
-			}
-
-		case ADIV, ADIVU, AMOD, AMODU:
-			if cursym.Text.From3.Offset&obj.NOSPLIT != 0 {
-				ctxt.Diag("cannot divide in NOSPLIT function")
-			}
-			if ctxt.Debugdivmod != 0 {
-				break
-			}
-			if p.From.Type != obj.TYPE_REG {
-				break
-			}
-			if p.To.Type != obj.TYPE_REG {
-				break
-			}
-
-			// Make copy because we overwrite p below.
-			q1 := *p
-			if q1.Reg == REGTMP || q1.Reg == 0 && q1.To.Reg == REGTMP {
-				ctxt.Diag("div already using REGTMP: %v", p)
-			}
-
-			/* MOV m(g),REGTMP */
-			p.As = AMOVW
-			p.Lineno = q1.Lineno
-			p.From.Type = obj.TYPE_MEM
-			p.From.Reg = REGG
-			p.From.Offset = 6 * 4 // offset of g.m
-			p.Reg = 0
-			p.To.Type = obj.TYPE_REG
-			p.To.Reg = REGTMP
-
-			/* MOV a,m_divmod(REGTMP) */
-			p = obj.Appendp(ctxt, p)
-			p.As = AMOVW
-			p.Lineno = q1.Lineno
-			p.From.Type = obj.TYPE_REG
-			p.From.Reg = q1.From.Reg
-			p.To.Type = obj.TYPE_MEM
-			p.To.Reg = REGTMP
-			p.To.Offset = 8 * 4 // offset of m.divmod
-
-			/* MOV b, R8 */
-			p = obj.Appendp(ctxt, p)
-			p.As = AMOVW
-			p.Lineno = q1.Lineno
-			p.From.Type = obj.TYPE_REG
-			p.From.Reg = q1.Reg
-			if q1.Reg == 0 {
-				p.From.Reg = q1.To.Reg
-			}
-			p.To.Type = obj.TYPE_REG
-			p.To.Reg = REG_R8
-			p.To.Offset = 0
-
-			/* CALL appropriate */
-			p = obj.Appendp(ctxt, p)
-			p.As = ABL
-			p.Lineno = q1.Lineno
-			p.To.Type = obj.TYPE_BRANCH
-			switch o {
-			case ADIV:
-				p.To.Sym = ctxt.Sym_div
-
-			case ADIVU:
-				p.To.Sym = ctxt.Sym_divu
-
-			case AMOD:
-				p.To.Sym = ctxt.Sym_mod
-
-			case AMODU:
-				p.To.Sym = ctxt.Sym_modu
-			}
-
-			/* MOV REGTMP, b */
-			p = obj.Appendp(ctxt, p)
-			p.As = AMOVW
-			p.Lineno = q1.Lineno
-			p.From.Type = obj.TYPE_REG
-			p.From.Reg = REGTMP
-			p.From.Offset = 0
-			p.To.Type = obj.TYPE_REG
-			p.To.Reg = q1.To.Reg
-
-		case AMOVW:
-			if (p.Scond&C_WBIT != 0) && p.To.Type == obj.TYPE_MEM && p.To.Reg == REGSP {
-				p.Spadj = int32(-p.To.Offset)
-			}
-			if (p.Scond&C_PBIT != 0) && p.From.Type == obj.TYPE_MEM && p.From.Reg == REGSP && p.To.Reg != REGPC {
-				p.Spadj = int32(-p.From.Offset)
-			}
-			if p.From.Type == obj.TYPE_ADDR && p.From.Reg == REGSP && p.To.Type == obj.TYPE_REG && p.To.Reg == REGSP {
-				p.Spadj = int32(-p.From.Offset)
-			}
-		}
-	}
-}
-
-func isfloatreg(a *obj.Addr) bool {
-	return a.Type == obj.TYPE_REG && REG_F0 <= a.Reg && a.Reg <= REG_F15
-}
-
-func softfloat(ctxt *obj.Link, cursym *obj.LSym) {
-	if obj.GOARM > 5 {
-		return
-	}
-
-	symsfloat := obj.Linklookup(ctxt, "_sfloat", 0)
-
-	wasfloat := 0
-	for p := cursym.Text; p != nil; p = p.Link {
-		if p.Pcond != nil {
-			p.Pcond.Mark |= LABEL
-		}
-	}
-	var next *obj.Prog
-	for p := cursym.Text; p != nil; p = p.Link {
-		switch p.As {
-		case AMOVW:
-			if isfloatreg(&p.To) || isfloatreg(&p.From) {
-				goto soft
-			}
-			goto notsoft
-
-		case AMOVWD,
-			AMOVWF,
-			AMOVDW,
-			AMOVFW,
-			AMOVFD,
-			AMOVDF,
-			AMOVF,
-			AMOVD,
-			ACMPF,
-			ACMPD,
-			AADDF,
-			AADDD,
-			ASUBF,
-			ASUBD,
-			AMULF,
-			AMULD,
-			ADIVF,
-			ADIVD,
-			ASQRTF,
-			ASQRTD,
-			AABSF,
-			AABSD,
-			ANEGF,
-			ANEGD:
-			goto soft
-
-		default:
-			goto notsoft
-		}
-
-	soft:
-		if wasfloat == 0 || (p.Mark&LABEL != 0) {
-			next = ctxt.NewProg()
-			*next = *p
-
-			// BL _sfloat(SB)
-			*p = obj.Prog{}
-			p.Ctxt = ctxt
-			p.Link = next
-			p.As = ABL
-			p.To.Type = obj.TYPE_BRANCH
-			p.To.Sym = symsfloat
-			p.Lineno = next.Lineno
-
-			p = next
-			wasfloat = 1
-		}
-
-		continue
-
-	notsoft:
-		wasfloat = 0
-	}
-}
-
-func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
-	// MOVW			g_stackguard(g), R1
-	p = obj.Appendp(ctxt, p)
-
-	p.As = AMOVW
-	p.From.Type = obj.TYPE_MEM
-	p.From.Reg = REGG
-	p.From.Offset = 2 * int64(ctxt.Arch.PtrSize) // G.stackguard0
-	if ctxt.Cursym.CFunc() {
-		p.From.Offset = 3 * int64(ctxt.Arch.PtrSize) // G.stackguard1
-	}
-	p.To.Type = obj.TYPE_REG
-	p.To.Reg = REG_R1
-
-	if framesize <= obj.StackSmall {
-		// small stack: SP < stackguard
-		//	CMP	stackguard, SP
-		p = obj.Appendp(ctxt, p)
-
-		p.As = ACMP
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R1
-		p.Reg = REGSP
-	} else if framesize <= obj.StackBig {
-		// large stack: SP-framesize < stackguard-StackSmall
-		//	MOVW $-framesize(SP), R2
-		//	CMP stackguard, R2
-		p = obj.Appendp(ctxt, p)
-
-		p.As = AMOVW
-		p.From.Type = obj.TYPE_ADDR
-		p.From.Reg = REGSP
-		p.From.Offset = int64(-framesize)
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R2
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ACMP
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R1
-		p.Reg = REG_R2
-	} else {
-		// Such a large stack we need to protect against wraparound
-		// if SP is close to zero.
-		//	SP-stackguard+StackGuard < framesize + (StackGuard-StackSmall)
-		// The +StackGuard on both sides is required to keep the left side positive:
-		// SP is allowed to be slightly below stackguard. See stack.h.
-		//	CMP $StackPreempt, R1
-		//	MOVW.NE $StackGuard(SP), R2
-		//	SUB.NE R1, R2
-		//	MOVW.NE $(framesize+(StackGuard-StackSmall)), R3
-		//	CMP.NE R3, R2
-		p = obj.Appendp(ctxt, p)
-
-		p.As = ACMP
-		p.From.Type = obj.TYPE_CONST
-		p.From.Offset = int64(uint32(obj.StackPreempt & (1<<32 - 1)))
-		p.Reg = REG_R1
-
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVW
-		p.From.Type = obj.TYPE_ADDR
-		p.From.Reg = REGSP
-		p.From.Offset = obj.StackGuard
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R2
-		p.Scond = C_SCOND_NE
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ASUB
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R1
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R2
-		p.Scond = C_SCOND_NE
-
-		p = obj.Appendp(ctxt, p)
-		p.As = AMOVW
-		p.From.Type = obj.TYPE_ADDR
-		p.From.Offset = int64(framesize) + (obj.StackGuard - obj.StackSmall)
-		p.To.Type = obj.TYPE_REG
-		p.To.Reg = REG_R3
-		p.Scond = C_SCOND_NE
-
-		p = obj.Appendp(ctxt, p)
-		p.As = ACMP
-		p.From.Type = obj.TYPE_REG
-		p.From.Reg = REG_R3
-		p.Reg = REG_R2
-		p.Scond = C_SCOND_NE
-	}
-
-	// BLS call-to-morestack
-	bls := obj.Appendp(ctxt, p)
-	bls.As = ABLS
-	bls.To.Type = obj.TYPE_BRANCH
-
-	var last *obj.Prog
-	for last = ctxt.Cursym.Text; last.Link != nil; last = last.Link {
-	}
-
-	// Now we are at the end of the function, but logically
-	// we are still in function prologue. We need to fix the
-	// SP data and PCDATA.
-	spfix := obj.Appendp(ctxt, last)
-	spfix.As = obj.ANOP
-	spfix.Spadj = -framesize
-
-	pcdata := obj.Appendp(ctxt, spfix)
-	pcdata.Lineno = ctxt.Cursym.Text.Lineno
-	pcdata.Mode = ctxt.Cursym.Text.Mode
-	pcdata.As = obj.APCDATA
-	pcdata.From.Type = obj.TYPE_CONST
-	pcdata.From.Offset = obj.PCDATA_StackMapIndex
-	pcdata.To.Type = obj.TYPE_CONST
-	pcdata.To.Offset = -1 // pcdata starts at -1 at function entry
-
-	// MOVW	LR, R3
-	movw := obj.Appendp(ctxt, pcdata)
-	movw.As = AMOVW
-	movw.From.Type = obj.TYPE_REG
-	movw.From.Reg = REGLINK
-	movw.To.Type = obj.TYPE_REG
-	movw.To.Reg = REG_R3
-
-	bls.Pcond = movw
-
-	// BL runtime.morestack
-	call := obj.Appendp(ctxt, movw)
-	call.As = obj.ACALL
-	call.To.Type = obj.TYPE_BRANCH
-	morestack := "runtime.morestack"
-	switch {
-	case ctxt.Cursym.CFunc():
-		morestack = "runtime.morestackc"
-	case ctxt.Cursym.Text.From3.Offset&obj.NEEDCTXT == 0:
-		morestack = "runtime.morestack_noctxt"
-	}
-	call.To.Sym = obj.Linklookup(ctxt, morestack, 0)
-
-	// B start
-	b := obj.Appendp(ctxt, call)
-	b.As = obj.AJMP
-	b.To.Type = obj.TYPE_BRANCH
-	b.Pcond = ctxt.Cursym.Text.Link
-	b.Spadj = +framesize
-
-	return bls
-}
-
-func initdiv(ctxt *obj.Link) {
-	if ctxt.Sym_div != nil {
-		return
-	}
-	ctxt.Sym_div = obj.Linklookup(ctxt, "_div", 0)
-	ctxt.Sym_divu = obj.Linklookup(ctxt, "_divu", 0)
-	ctxt.Sym_mod = obj.Linklookup(ctxt, "_mod", 0)
-	ctxt.Sym_modu = obj.Linklookup(ctxt, "_modu", 0)
-}
-
-func follow(ctxt *obj.Link, s *obj.LSym) {
-	ctxt.Cursym = s
-
-	firstp := ctxt.NewProg()
-	lastp := firstp
-	xfol(ctxt, s.Text, &lastp)
-	lastp.Link = nil
-	s.Text = firstp.Link
-}
-
-func relinv(a obj.As) obj.As {
-	switch a {
-	case ABEQ:
-		return ABNE
-	case ABNE:
-		return ABEQ
-	case ABCS:
-		return ABCC
-	case ABHS:
-		return ABLO
-	case ABCC:
-		return ABCS
-	case ABLO:
-		return ABHS
-	case ABMI:
-		return ABPL
-	case ABPL:
-		return ABMI
-	case ABVS:
-		return ABVC
-	case ABVC:
-		return ABVS
-	case ABHI:
-		return ABLS
-	case ABLS:
-		return ABHI
-	case ABGE:
-		return ABLT
-	case ABLT:
-		return ABGE
-	case ABGT:
-		return ABLE
-	case ABLE:
-		return ABGT
-	}
-
-	log.Fatalf("unknown relation: %s", Anames[a])
-	return 0
-}
-
-func xfol(ctxt *obj.Link, p *obj.Prog, last **obj.Prog) {
-	var q *obj.Prog
-	var r *obj.Prog
-	var i int
-
-loop:
-	if p == nil {
-		return
-	}
-	a := p.As
-	if a == AB {
-		q = p.Pcond
-		if q != nil && q.As != obj.ATEXT {
-			p.Mark |= FOLL
-			p = q
-			if p.Mark&FOLL == 0 {
-				goto loop
-			}
-		}
-	}
-
-	if p.Mark&FOLL != 0 {
-		i = 0
-		q = p
-		for ; i < 4; i, q = i+1, q.Link {
-			if q == *last || q == nil {
-				break
-			}
-			a = q.As
-			if a == obj.ANOP {
-				i--
-				continue
-			}
-
-			if a == AB || (a == obj.ARET && q.Scond == C_SCOND_NONE) || a == ARFE || a == obj.AUNDEF {
-				goto copy
-			}
-			if q.Pcond == nil || (q.Pcond.Mark&FOLL != 0) {
-				continue
-			}
-			if a != ABEQ && a != ABNE {
-				continue
-			}
-
-		copy:
-			for {
-				r = ctxt.NewProg()
-				*r = *p
-				if r.Mark&FOLL == 0 {
-					fmt.Printf("can't happen 1\n")
-				}
-				r.Mark |= FOLL
-				if p != q {
-					p = p.Link
-					(*last).Link = r
-					*last = r
-					continue
-				}
-
-				(*last).Link = r
-				*last = r
-				if a == AB || (a == obj.ARET && q.Scond == C_SCOND_NONE) || a == ARFE || a == obj.AUNDEF {
-					return
-				}
-				r.As = ABNE
-				if a == ABNE {
-					r.As = ABEQ
-				}
-				r.Pcond = p.Link
-				r.Link = p.Pcond
-				if r.Link.Mark&FOLL == 0 {
-					xfol(ctxt, r.Link, last)
-				}
-				if r.Pcond.Mark&FOLL == 0 {
-					fmt.Printf("can't happen 2\n")
-				}
-				return
-			}
-		}
-
-		a = AB
-		q = ctxt.NewProg()
-		q.As = a
-		q.Lineno = p.Lineno
-		q.To.Type = obj.TYPE_BRANCH
-		q.To.Offset = p.Pc
-		q.Pcond = p
-		p = q
-	}
-
-	p.Mark |= FOLL
-	(*last).Link = p
-	*last = p
-	if a == AB || (a == obj.ARET && p.Scond == C_SCOND_NONE) || a == ARFE || a == obj.AUNDEF {
-		return
-	}
-
-	if p.Pcond != nil {
-		if a != ABL && a != ABX && p.Link != nil {
-			q = obj.Brchain(ctxt, p.Link)
-			if a != obj.ATEXT {
-				if q != nil && (q.Mark&FOLL != 0) {
-					p.As = relinv(a)
-					p.Link = p.Pcond
-					p.Pcond = q
-				}
-			}
-
-			xfol(ctxt, p.Link, last)
-			q = obj.Brchain(ctxt, p.Pcond)
-			if q == nil {
-				q = p.Pcond
-			}
-			if q.Mark&FOLL != 0 {
-				p.Pcond = q
-				return
-			}
-
-			p = q
-			goto loop
-		}
-	}
-
-	p = p.Link
-	goto loop
-}
-
-var unaryDst = map[obj.As]bool{
-	ASWI:  true,
-	AWORD: true,
-}
-
-var Linkarm = obj.LinkArch{
-	Arch:       sys.ArchARM,
-	Preprocess: preprocess,
-	Assemble:   span5,
-	Follow:     follow,
-	Progedit:   progedit,
-	UnaryDst:   unaryDst,
-}