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Golang gc.Afunclit函數代碼示例

本文整理匯總了Golang中cmd/internal/gc.Afunclit函數的典型用法代碼示例。如果您正苦於以下問題：Golang Afunclit函數的具體用法？Golang Afunclit怎麽用？Golang Afunclit使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。


在下文中一共展示了Afunclit函數的7個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。

示例1: zerorange

func zerorange(p *obj.Prog, frame int64, lo int64, hi int64) *obj.Prog {
	cnt := hi - lo
	if cnt == 0 {
		return p
	}
	if cnt < int64(4*gc.Widthptr) {
		for i := int64(0); i < cnt; i += int64(gc.Widthptr) {
			p = appendpp(p, ppc64.AMOVD, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGSP, 8+frame+lo+i)
		}
	} else if cnt <= int64(128*gc.Widthptr) {
		p = appendpp(p, ppc64.AADD, obj.TYPE_CONST, 0, 8+frame+lo-8, obj.TYPE_REG, ppc64.REGRT1, 0)
		p.Reg = ppc64.REGSP
		p = appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
		f := gc.Sysfunc("duffzero")
		gc.Naddr(&p.To, f)
		gc.Afunclit(&p.To, f)
		p.To.Offset = 4 * (128 - cnt/int64(gc.Widthptr))
	} else {
		p = appendpp(p, ppc64.AMOVD, obj.TYPE_CONST, 0, 8+frame+lo-8, obj.TYPE_REG, ppc64.REGTMP, 0)
		p = appendpp(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT1, 0)
		p.Reg = ppc64.REGSP
		p = appendpp(p, ppc64.AMOVD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, ppc64.REGTMP, 0)
		p = appendpp(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
		p.Reg = ppc64.REGRT1
		p = appendpp(p, ppc64.AMOVDU, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGRT1, int64(gc.Widthptr))
		p1 := p
		p = appendpp(p, ppc64.ACMP, obj.TYPE_REG, ppc64.REGRT1, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
		p = appendpp(p, ppc64.ABNE, obj.TYPE_NONE, 0, 0, obj.TYPE_BRANCH, 0, 0)
		gc.Patch(p, p1)
	}

	return p
}
開發者ID:tidatida，項目名稱:go，代碼行數:33，代碼來源:ggen.go

示例2: zerorange

func zerorange(p *obj.Prog, frame int64, lo int64, hi int64, r0 *uint32) *obj.Prog {
	cnt := hi - lo
	if cnt == 0 {
		return p
	}
	if *r0 == 0 {
		p = appendpp(p, arm.AMOVW, obj.TYPE_CONST, 0, 0, obj.TYPE_REG, arm.REG_R0, 0)
		*r0 = 1
	}

	if cnt < int64(4*gc.Widthptr) {
		for i := int64(0); i < cnt; i += int64(gc.Widthptr) {
			p = appendpp(p, arm.AMOVW, obj.TYPE_REG, arm.REG_R0, 0, obj.TYPE_MEM, arm.REGSP, int32(4+frame+lo+i))
		}
	} else if !gc.Nacl && (cnt <= int64(128*gc.Widthptr)) {
		p = appendpp(p, arm.AADD, obj.TYPE_CONST, 0, int32(4+frame+lo), obj.TYPE_REG, arm.REG_R1, 0)
		p.Reg = arm.REGSP
		p = appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
		f := gc.Sysfunc("duffzero")
		gc.Naddr(&p.To, f)
		gc.Afunclit(&p.To, f)
		p.To.Offset = 4 * (128 - cnt/int64(gc.Widthptr))
	} else {
		p = appendpp(p, arm.AADD, obj.TYPE_CONST, 0, int32(4+frame+lo), obj.TYPE_REG, arm.REG_R1, 0)
		p.Reg = arm.REGSP
		p = appendpp(p, arm.AADD, obj.TYPE_CONST, 0, int32(cnt), obj.TYPE_REG, arm.REG_R2, 0)
		p.Reg = arm.REG_R1
		p = appendpp(p, arm.AMOVW, obj.TYPE_REG, arm.REG_R0, 0, obj.TYPE_MEM, arm.REG_R1, 4)
		p1 := p
		p.Scond |= arm.C_PBIT
		p = appendpp(p, arm.ACMP, obj.TYPE_REG, arm.REG_R1, 0, obj.TYPE_NONE, 0, 0)
		p.Reg = arm.REG_R2
		p = appendpp(p, arm.ABNE, obj.TYPE_NONE, 0, 0, obj.TYPE_BRANCH, 0, 0)
		gc.Patch(p, p1)
	}

	return p
}
開發者ID:bibbyflyaway，項目名稱:go，代碼行數:38，代碼來源:ggen.go

示例3: clearfat

func clearfat(nl *gc.Node) {
	/* clear a fat object */
	if gc.Debug['g'] != 0 {
		fmt.Printf("clearfat %v (%v, size: %d)\n", gc.Nconv(nl, 0), gc.Tconv(nl.Type, 0), nl.Type.Width)
	}

	w := uint64(uint64(nl.Type.Width))

	// Avoid taking the address for simple enough types.
	if gc.Componentgen(nil, nl) {
		return
	}

	c := uint64(w % 8) // bytes
	q := uint64(w / 8) // dwords

	if gc.Reginuse(ppc64.REGRT1) {
		gc.Fatal("%v in use during clearfat", obj.Rconv(ppc64.REGRT1))
	}

	var r0 gc.Node
	gc.Nodreg(&r0, gc.Types[gc.TUINT64], ppc64.REGZERO)
	var dst gc.Node
	gc.Nodreg(&dst, gc.Types[gc.Tptr], ppc64.REGRT1)
	gc.Regrealloc(&dst)
	gc.Agen(nl, &dst)

	var boff uint64
	if q > 128 {
		p := gins(ppc64.ASUB, nil, &dst)
		p.From.Type = obj.TYPE_CONST
		p.From.Offset = 8

		var end gc.Node
		gc.Regalloc(&end, gc.Types[gc.Tptr], nil)
		p = gins(ppc64.AMOVD, &dst, &end)
		p.From.Type = obj.TYPE_ADDR
		p.From.Offset = int64(q * 8)

		p = gins(ppc64.AMOVDU, &r0, &dst)
		p.To.Type = obj.TYPE_MEM
		p.To.Offset = 8
		pl := (*obj.Prog)(p)

		p = gins(ppc64.ACMP, &dst, &end)
		gc.Patch(gc.Gbranch(ppc64.ABNE, nil, 0), pl)

		gc.Regfree(&end)

		// The loop leaves R3 on the last zeroed dword
		boff = 8
	} else if q >= 4 {
		p := gins(ppc64.ASUB, nil, &dst)
		p.From.Type = obj.TYPE_CONST
		p.From.Offset = 8
		f := (*gc.Node)(gc.Sysfunc("duffzero"))
		p = gins(obj.ADUFFZERO, nil, f)
		gc.Afunclit(&p.To, f)

		// 4 and 128 = magic constants: see ../../runtime/asm_ppc64x.s
		p.To.Offset = int64(4 * (128 - q))

		// duffzero leaves R3 on the last zeroed dword
		boff = 8
	} else {
		var p *obj.Prog
		for t := uint64(0); t < q; t++ {
			p = gins(ppc64.AMOVD, &r0, &dst)
			p.To.Type = obj.TYPE_MEM
			p.To.Offset = int64(8 * t)
		}

		boff = 8 * q
	}

	var p *obj.Prog
	for t := uint64(0); t < c; t++ {
		p = gins(ppc64.AMOVB, &r0, &dst)
		p.To.Type = obj.TYPE_MEM
		p.To.Offset = int64(t + boff)
	}

	gc.Regfree(&dst)
}
開發者ID:tidatida，項目名稱:go，代碼行數:84，代碼來源:ggen.go

示例4: ginscall

/*
 * generate:
 *	call f
 *	proc=-1	normal call but no return
 *	proc=0	normal call
 *	proc=1	goroutine run in new proc
 *	proc=2	defer call save away stack
  *	proc=3	normal call to C pointer (not Go func value)
*/
func ginscall(f *gc.Node, proc int) {
	if f.Type != nil {
		extra := int32(0)
		if proc == 1 || proc == 2 {
			extra = 2 * int32(gc.Widthptr)
		}
		gc.Setmaxarg(f.Type, extra)
	}

	switch proc {
	default:
		gc.Fatal("ginscall: bad proc %d", proc)

	case 0, // normal call
		-1: // normal call but no return
		if f.Op == gc.ONAME && f.Class == gc.PFUNC {
			if f == gc.Deferreturn {
				// Deferred calls will appear to be returning to
				// the CALL deferreturn(SB) that we are about to emit.
				// However, the stack trace code will show the line
				// of the instruction byte before the return PC.
				// To avoid that being an unrelated instruction,
				// insert an x86 NOP that we will have the right line number.
				// x86 NOP 0x90 is really XCHG AX, AX; use that description
				// because the NOP pseudo-instruction will be removed by
				// the linker.
				var reg gc.Node
				gc.Nodreg(&reg, gc.Types[gc.TINT], x86.REG_AX)

				gins(x86.AXCHGL, &reg, &reg)
			}

			p := gins(obj.ACALL, nil, f)
			gc.Afunclit(&p.To, f)
			if proc == -1 || gc.Noreturn(p) {
				gins(obj.AUNDEF, nil, nil)
			}
			break
		}

		var reg gc.Node
		gc.Nodreg(&reg, gc.Types[gc.Tptr], x86.REG_DX)
		var r1 gc.Node
		gc.Nodreg(&r1, gc.Types[gc.Tptr], x86.REG_BX)
		gmove(f, &reg)
		reg.Op = gc.OINDREG
		gmove(&reg, &r1)
		reg.Op = gc.OREGISTER
		gins(obj.ACALL, &reg, &r1)

	case 3: // normal call of c function pointer
		gins(obj.ACALL, nil, f)

	case 1, // call in new proc (go)
		2: // deferred call (defer)
		var stk gc.Node

		stk.Op = gc.OINDREG
		stk.Val.U.Reg = x86.REG_SP
		stk.Xoffset = 0

		// size of arguments at 0(SP)
		var con gc.Node
		gc.Nodconst(&con, gc.Types[gc.TINT32], int64(gc.Argsize(f.Type)))

		gins(x86.AMOVL, &con, &stk)

		// FuncVal* at 4(SP)
		stk.Xoffset = int64(gc.Widthptr)

		gins(x86.AMOVL, f, &stk)

		if proc == 1 {
			ginscall(gc.Newproc, 0)
		} else {
			ginscall(gc.Deferproc, 0)
		}
		if proc == 2 {
			var reg gc.Node
			gc.Nodreg(&reg, gc.Types[gc.TINT32], x86.REG_AX)
			gins(x86.ATESTL, &reg, &reg)
			p := gc.Gbranch(x86.AJEQ, nil, +1)
			cgen_ret(nil)
			gc.Patch(p, gc.Pc)
		}
	}
}
開發者ID:klueska，項目名稱:go-akaros，代碼行數:96，代碼來源:ggen.go

示例5: blockcopy

func blockcopy(n, res *gc.Node, osrc, odst, w int64) {
	// determine alignment.
	// want to avoid unaligned access, so have to use
	// smaller operations for less aligned types.
	// for example moving [4]byte must use 4 MOVB not 1 MOVW.
	align := int(n.Type.Align)

	var op int
	switch align {
	default:
		gc.Fatal("sgen: invalid alignment %d for %v", align, n.Type)

	case 1:
		op = arm.AMOVB

	case 2:
		op = arm.AMOVH

	case 4:
		op = arm.AMOVW
	}

	if w%int64(align) != 0 {
		gc.Fatal("sgen: unaligned size %d (align=%d) for %v", w, align, n.Type)
	}
	c := int32(w / int64(align))

	if osrc%int64(align) != 0 || odst%int64(align) != 0 {
		gc.Fatal("sgen: unaligned offset src %d or dst %d (align %d)", osrc, odst, align)
	}

	// if we are copying forward on the stack and
	// the src and dst overlap, then reverse direction
	dir := align
	if osrc < odst && int64(odst) < int64(osrc)+w {
		dir = -dir
	}

	if op == arm.AMOVW && !gc.Nacl && dir > 0 && c >= 4 && c <= 128 {
		var r0 gc.Node
		r0.Op = gc.OREGISTER
		r0.Reg = arm.REG_R0
		var r1 gc.Node
		r1.Op = gc.OREGISTER
		r1.Reg = arm.REG_R0 + 1
		var r2 gc.Node
		r2.Op = gc.OREGISTER
		r2.Reg = arm.REG_R0 + 2

		var src gc.Node
		gc.Regalloc(&src, gc.Types[gc.Tptr], &r1)
		var dst gc.Node
		gc.Regalloc(&dst, gc.Types[gc.Tptr], &r2)
		if n.Ullman >= res.Ullman {
			// eval n first
			gc.Agen(n, &src)

			if res.Op == gc.ONAME {
				gc.Gvardef(res)
			}
			gc.Agen(res, &dst)
		} else {
			// eval res first
			if res.Op == gc.ONAME {
				gc.Gvardef(res)
			}
			gc.Agen(res, &dst)
			gc.Agen(n, &src)
		}

		var tmp gc.Node
		gc.Regalloc(&tmp, gc.Types[gc.Tptr], &r0)
		f := gc.Sysfunc("duffcopy")
		p := gins(obj.ADUFFCOPY, nil, f)
		gc.Afunclit(&p.To, f)

		// 8 and 128 = magic constants: see ../../runtime/asm_arm.s
		p.To.Offset = 8 * (128 - int64(c))

		gc.Regfree(&tmp)
		gc.Regfree(&src)
		gc.Regfree(&dst)
		return
	}

	var dst gc.Node
	var src gc.Node
	if n.Ullman >= res.Ullman {
		gc.Agenr(n, &dst, res) // temporarily use dst
		gc.Regalloc(&src, gc.Types[gc.Tptr], nil)
		gins(arm.AMOVW, &dst, &src)
		if res.Op == gc.ONAME {
			gc.Gvardef(res)
		}
		gc.Agen(res, &dst)
	} else {
		if res.Op == gc.ONAME {
			gc.Gvardef(res)
		}
		gc.Agenr(res, &dst, res)
//.........這裏部分代碼省略.........
開發者ID:bibbyflyaway，項目名稱:go，代碼行數:101，代碼來源:cgen.go

示例6: clearfat

func clearfat(nl *gc.Node) {
	/* clear a fat object */
	if gc.Debug['g'] != 0 {
		gc.Dump("\nclearfat", nl)
	}

	w := uint32(nl.Type.Width)

	// Avoid taking the address for simple enough types.
	if gc.Componentgen(nil, nl) {
		return
	}

	c := w % 4 // bytes
	q := w / 4 // quads

	var r0 gc.Node
	r0.Op = gc.OREGISTER

	r0.Reg = arm.REG_R0
	var r1 gc.Node
	r1.Op = gc.OREGISTER
	r1.Reg = arm.REG_R1
	var dst gc.Node
	gc.Regalloc(&dst, gc.Types[gc.Tptr], &r1)
	gc.Agen(nl, &dst)
	var nc gc.Node
	gc.Nodconst(&nc, gc.Types[gc.TUINT32], 0)
	var nz gc.Node
	gc.Regalloc(&nz, gc.Types[gc.TUINT32], &r0)
	gc.Cgen(&nc, &nz)

	if q > 128 {
		var end gc.Node
		gc.Regalloc(&end, gc.Types[gc.Tptr], nil)
		p := gins(arm.AMOVW, &dst, &end)
		p.From.Type = obj.TYPE_ADDR
		p.From.Offset = int64(q) * 4

		p = gins(arm.AMOVW, &nz, &dst)
		p.To.Type = obj.TYPE_MEM
		p.To.Offset = 4
		p.Scond |= arm.C_PBIT
		pl := p

		p = gins(arm.ACMP, &dst, nil)
		raddr(&end, p)
		gc.Patch(gc.Gbranch(arm.ABNE, nil, 0), pl)

		gc.Regfree(&end)
	} else if q >= 4 && !gc.Nacl {
		f := gc.Sysfunc("duffzero")
		p := gins(obj.ADUFFZERO, nil, f)
		gc.Afunclit(&p.To, f)

		// 4 and 128 = magic constants: see ../../runtime/asm_arm.s
		p.To.Offset = 4 * (128 - int64(q))
	} else {
		var p *obj.Prog
		for q > 0 {
			p = gins(arm.AMOVW, &nz, &dst)
			p.To.Type = obj.TYPE_MEM
			p.To.Offset = 4
			p.Scond |= arm.C_PBIT

			//print("1. %P\n", p);
			q--
		}
	}

	var p *obj.Prog
	for c > 0 {
		p = gins(arm.AMOVB, &nz, &dst)
		p.To.Type = obj.TYPE_MEM
		p.To.Offset = 1
		p.Scond |= arm.C_PBIT

		//print("2. %P\n", p);
		c--
	}

	gc.Regfree(&dst)
	gc.Regfree(&nz)
}
開發者ID:bibbyflyaway，項目名稱:go，代碼行數:84，代碼來源:ggen.go

示例7: sgen


//.........這裏部分代碼省略.........
		r0.Val.U.Reg = REGALLOC_R0
		var r1 gc.Node
		r1.Op = gc.OREGISTER
		r1.Val.U.Reg = REGALLOC_R0 + 1
		var r2 gc.Node
		r2.Op = gc.OREGISTER
		r2.Val.U.Reg = REGALLOC_R0 + 2

		var src gc.Node
		regalloc(&src, gc.Types[gc.Tptr], &r1)
		var dst gc.Node
		regalloc(&dst, gc.Types[gc.Tptr], &r2)
		if n.Ullman >= res.Ullman {
			// eval n first
			agen(n, &src)

			if res.Op == gc.ONAME {
				gc.Gvardef(res)
			}
			agen(res, &dst)
		} else {
			// eval res first
			if res.Op == gc.ONAME {
				gc.Gvardef(res)
			}
			agen(res, &dst)
			agen(n, &src)
		}

		var tmp gc.Node
		regalloc(&tmp, gc.Types[gc.Tptr], &r0)
		f := gc.Sysfunc("duffcopy")
		p := gins(obj.ADUFFCOPY, nil, f)
		gc.Afunclit(&p.To, f)

		// 8 and 128 = magic constants: see ../../runtime/asm_arm.s
		p.To.Offset = 8 * (128 - int64(c))

		regfree(&tmp)
		regfree(&src)
		regfree(&dst)
		return
	}

	var dst gc.Node
	var src gc.Node
	if n.Ullman >= res.Ullman {
		agenr(n, &dst, res) // temporarily use dst
		regalloc(&src, gc.Types[gc.Tptr], nil)
		gins(arm.AMOVW, &dst, &src)
		if res.Op == gc.ONAME {
			gc.Gvardef(res)
		}
		agen(res, &dst)
	} else {
		if res.Op == gc.ONAME {
			gc.Gvardef(res)
		}
		agenr(res, &dst, res)
		agenr(n, &src, nil)
	}

	var tmp gc.Node
	regalloc(&tmp, gc.Types[gc.TUINT32], nil)

	// set up end marker
開發者ID:klueska，項目名稱:go-akaros，代碼行數:67，代碼來源:cgen.go


注：本文中的cmd/internal/gc.Afunclit函數示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。