Пример #1
0
func defframe(ptxt *obj.Prog) {
	var n *gc.Node

	// fill in argument size, stack size
	ptxt.To.Type = obj.TYPE_TEXTSIZE

	ptxt.To.Val = int32(gc.Rnd(gc.Curfn.Type.Argwid, int64(gc.Widthptr)))
	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))

	// arm64 requires that the frame size (not counting saved LR)
	// be empty or be 8 mod 16. If not, pad it.
	if frame != 0 && frame%16 != 8 {
		frame += 8
	}

	ptxt.To.Offset = int64(frame)

	// insert code to zero ambiguously live variables
	// so that the garbage collector only sees initialized values
	// when it looks for pointers.
	p := ptxt

	hi := int64(0)
	lo := hi

	// iterate through declarations - they are sorted in decreasing xoffset order.
	for l := gc.Curfn.Func.Dcl; l != nil; l = l.Next {
		n = l.N
		if !n.Name.Needzero {
			continue
		}
		if n.Class != gc.PAUTO {
			gc.Fatalf("needzero class %d", n.Class)
		}
		if n.Type.Width%int64(gc.Widthptr) != 0 || n.Xoffset%int64(gc.Widthptr) != 0 || n.Type.Width == 0 {
			gc.Fatalf("var %v has size %d offset %d", gc.Nconv(n, obj.FmtLong), int(n.Type.Width), int(n.Xoffset))
		}

		if lo != hi && n.Xoffset+n.Type.Width >= lo-int64(2*gc.Widthreg) {
			// merge with range we already have
			lo = n.Xoffset

			continue
		}

		// zero old range
		p = zerorange(p, int64(frame), lo, hi)

		// set new range
		hi = n.Xoffset + n.Type.Width

		lo = n.Xoffset
	}

	// zero final range
	zerorange(p, int64(frame), lo, hi)
}
Пример #2
0
func defframe(ptxt *obj.Prog) {
	// fill in argument size, stack size
	ptxt.To.Type = obj.TYPE_TEXTSIZE

	ptxt.To.Val = int32(gc.Rnd(gc.Curfn.Type.ArgWidth(), int64(gc.Widthptr)))
	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
	ptxt.To.Offset = int64(frame)

	// insert code to zero ambiguously live variables
	// so that the garbage collector only sees initialized values
	// when it looks for pointers.
	p := ptxt

	hi := int64(0)
	lo := hi
	ax := uint32(0)
	x0 := uint32(0)

	// iterate through declarations - they are sorted in decreasing xoffset order.
	for _, n := range gc.Curfn.Func.Dcl {
		if !n.Name.Needzero {
			continue
		}
		if n.Class != gc.PAUTO {
			gc.Fatalf("needzero class %d", n.Class)
		}
		if n.Type.Width%int64(gc.Widthptr) != 0 || n.Xoffset%int64(gc.Widthptr) != 0 || n.Type.Width == 0 {
			gc.Fatalf("var %v has size %d offset %d", gc.Nconv(n, gc.FmtLong), int(n.Type.Width), int(n.Xoffset))
		}

		if lo != hi && n.Xoffset+n.Type.Width >= lo-int64(2*gc.Widthreg) {
			// merge with range we already have
			lo = n.Xoffset

			continue
		}

		// zero old range
		p = zerorange(p, int64(frame), lo, hi, &ax, &x0)

		// set new range
		hi = n.Xoffset + n.Type.Width

		lo = n.Xoffset
	}

	// zero final range
	zerorange(p, int64(frame), lo, hi, &ax, &x0)
}
Пример #3
0
Файл: ggen.go Проект: arnold8/go
func defframe(ptxt *obj.Prog) {
	var n *gc.Node

	// fill in argument size, stack size
	ptxt.To.Type = obj.TYPE_TEXTSIZE

	ptxt.To.Val = int32(gc.Rnd(gc.Curfn.Type.Argwid, int64(gc.Widthptr)))
	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
	ptxt.To.Offset = int64(frame)

	// insert code to contain ambiguously live variables
	// so that garbage collector only sees initialized values
	// when it looks for pointers.
	p := ptxt

	hi := int64(0)
	lo := hi
	r0 := uint32(0)
	for l := gc.Curfn.Func.Dcl; l != nil; l = l.Next {
		n = l.N
		if !n.Name.Needzero {
			continue
		}
		if n.Class != gc.PAUTO {
			gc.Fatalf("needzero class %d", n.Class)
		}
		if n.Type.Width%int64(gc.Widthptr) != 0 || n.Xoffset%int64(gc.Widthptr) != 0 || n.Type.Width == 0 {
			gc.Fatalf("var %v has size %d offset %d", gc.Nconv(n, obj.FmtLong), int(n.Type.Width), int(n.Xoffset))
		}
		if lo != hi && n.Xoffset+n.Type.Width >= lo-int64(2*gc.Widthptr) {
			// merge with range we already have
			lo = gc.Rnd(n.Xoffset, int64(gc.Widthptr))

			continue
		}

		// zero old range
		p = zerorange(p, int64(frame), lo, hi, &r0)

		// set new range
		hi = n.Xoffset + n.Type.Width

		lo = n.Xoffset
	}

	// zero final range
	zerorange(p, int64(frame), lo, hi, &r0)
}
Пример #4
0
/*
 * generate move:
 *	t = f
 * hard part is conversions.
 */
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))
	}

	ft := int(gc.Simsimtype(f.Type))
	tt := int(gc.Simsimtype(t.Type))
	cvt := (*gc.Type)(t.Type)

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	// cannot have two memory operands
	var r1 gc.Node
	var a int
	if gc.Ismem(f) && gc.Ismem(t) {
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		switch tt {
		default:
			f.Convconst(&con, t.Type)

		case gc.TINT32,
			gc.TINT16,
			gc.TINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(arm64.AMOVD, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return

		case gc.TUINT32,
			gc.TUINT16,
			gc.TUINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TUINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(arm64.AMOVD, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return
		}

		f = &con
		ft = tt // so big switch will choose a simple mov

		// constants can't move directly to memory.
		if gc.Ismem(t) {
			goto hard
		}
	}

	// value -> value copy, first operand in memory.
	// any floating point operand requires register
	// src, so goto hard to copy to register first.
	if gc.Ismem(f) && ft != tt && (gc.Isfloat[ft] || gc.Isfloat[tt]) {
		cvt = gc.Types[ft]
		goto hard
	}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatalf("gmove %v -> %v", gc.Tconv(f.Type, obj.FmtLong), gc.Tconv(t.Type, obj.FmtLong))

		/*
		 * integer copy and truncate
		 */
	case gc.TINT8<<16 | gc.TINT8, // same size
		gc.TUINT8<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TINT8,
		// truncate
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8:
		a = arm64.AMOVB

	case gc.TINT8<<16 | gc.TUINT8, // same size
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TUINT8,
		// truncate
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = arm64.AMOVBU

	case gc.TINT16<<16 | gc.TINT16, // same size
		gc.TUINT16<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TINT16,
		// truncate
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16:
		a = arm64.AMOVH

	case gc.TINT16<<16 | gc.TUINT16, // same size
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TUINT16,
		// truncate
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = arm64.AMOVHU

	case gc.TINT32<<16 | gc.TINT32, // same size
		gc.TUINT32<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TINT32,
		// truncate
		gc.TUINT64<<16 | gc.TINT32:
		a = arm64.AMOVW

	case gc.TINT32<<16 | gc.TUINT32, // same size
		gc.TUINT32<<16 | gc.TUINT32,
		gc.TINT64<<16 | gc.TUINT32,
		gc.TUINT64<<16 | gc.TUINT32:
		a = arm64.AMOVWU

	case gc.TINT64<<16 | gc.TINT64, // same size
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = arm64.AMOVD

		/*
		 * integer up-conversions
		 */
	case gc.TINT8<<16 | gc.TINT16, // sign extend int8
		gc.TINT8<<16 | gc.TUINT16,
		gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32,
		gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = arm64.AMOVB

		goto rdst

	case gc.TUINT8<<16 | gc.TINT16, // zero extend uint8
		gc.TUINT8<<16 | gc.TUINT16,
		gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32,
		gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = arm64.AMOVBU

		goto rdst

	case gc.TINT16<<16 | gc.TINT32, // sign extend int16
		gc.TINT16<<16 | gc.TUINT32,
		gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = arm64.AMOVH

		goto rdst

	case gc.TUINT16<<16 | gc.TINT32, // zero extend uint16
		gc.TUINT16<<16 | gc.TUINT32,
		gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = arm64.AMOVHU

		goto rdst

	case gc.TINT32<<16 | gc.TINT64, // sign extend int32
		gc.TINT32<<16 | gc.TUINT64:
		a = arm64.AMOVW

		goto rdst

	case gc.TUINT32<<16 | gc.TINT64, // zero extend uint32
		gc.TUINT32<<16 | gc.TUINT64:
		a = arm64.AMOVWU

		goto rdst

	/*
	* float to integer
	 */
	case gc.TFLOAT32<<16 | gc.TINT32:
		a = arm64.AFCVTZSSW
		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT32:
		a = arm64.AFCVTZSDW
		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT64:
		a = arm64.AFCVTZSS
		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT64:
		a = arm64.AFCVTZSD
		goto rdst

	case gc.TFLOAT32<<16 | gc.TUINT32:
		a = arm64.AFCVTZUSW
		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT32:
		a = arm64.AFCVTZUDW
		goto rdst

	case gc.TFLOAT32<<16 | gc.TUINT64:
		a = arm64.AFCVTZUS
		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT64:
		a = arm64.AFCVTZUD
		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT16,
		gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TINT16,
		gc.TFLOAT64<<16 | gc.TINT8:
		cvt = gc.Types[gc.TINT32]

		goto hard

	case gc.TFLOAT32<<16 | gc.TUINT16,
		gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TUINT16,
		gc.TFLOAT64<<16 | gc.TUINT8:
		cvt = gc.Types[gc.TUINT32]

		goto hard

	/*
	 * integer to float
	 */
	case gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT32,
		gc.TINT32<<16 | gc.TFLOAT32:
		a = arm64.ASCVTFWS

		goto rdst

	case gc.TINT8<<16 | gc.TFLOAT64,
		gc.TINT16<<16 | gc.TFLOAT64,
		gc.TINT32<<16 | gc.TFLOAT64:
		a = arm64.ASCVTFWD

		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT32:
		a = arm64.ASCVTFS
		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT64:
		a = arm64.ASCVTFD
		goto rdst

	case gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT32,
		gc.TUINT32<<16 | gc.TFLOAT32:
		a = arm64.AUCVTFWS

		goto rdst

	case gc.TUINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT64,
		gc.TUINT32<<16 | gc.TFLOAT64:
		a = arm64.AUCVTFWD

		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT32:
		a = arm64.AUCVTFS
		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT64:
		a = arm64.AUCVTFD
		goto rdst

		/*
		 * float to float
		 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = arm64.AFMOVS

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = arm64.AFMOVD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = arm64.AFCVTSD
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = arm64.AFCVTDS
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	gc.Regalloc(&r1, t.Type, t)

	gins(a, f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return

	// requires register intermediate
hard:
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}
Пример #5
0
/*
 * generate move:
 *	t = f
 * hard part is conversions.
 */
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))
	}

	ft := int(gc.Simsimtype(f.Type))
	tt := int(gc.Simsimtype(t.Type))
	cvt := (*gc.Type)(t.Type)

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	// cannot have two memory operands
	var r2 gc.Node
	var r1 gc.Node
	var a int
	if gc.Ismem(f) && gc.Ismem(t) {
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		switch tt {
		default:
			f.Convconst(&con, t.Type)

		case gc.TINT32,
			gc.TINT16,
			gc.TINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(ppc64.AMOVD, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return

		case gc.TUINT32,
			gc.TUINT16,
			gc.TUINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TUINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(ppc64.AMOVD, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return
		}

		f = &con
		ft = tt // so big switch will choose a simple mov

		// constants can't move directly to memory.
		if gc.Ismem(t) {
			goto hard
		}
	}

	// float constants come from memory.
	//if(isfloat[tt])
	//	goto hard;

	// 64-bit immediates are also from memory.
	//if(isint[tt])
	//	goto hard;
	//// 64-bit immediates are really 32-bit sign-extended
	//// unless moving into a register.
	//if(isint[tt]) {
	//	if(mpcmpfixfix(con.val.u.xval, minintval[TINT32]) < 0)
	//		goto hard;
	//	if(mpcmpfixfix(con.val.u.xval, maxintval[TINT32]) > 0)
	//		goto hard;
	//}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatalf("gmove %v -> %v", gc.Tconv(f.Type, obj.FmtLong), gc.Tconv(t.Type, obj.FmtLong))

		/*
		 * integer copy and truncate
		 */
	case gc.TINT8<<16 | gc.TINT8, // same size
		gc.TUINT8<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TINT8,
		// truncate
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8:
		a = ppc64.AMOVB

	case gc.TINT8<<16 | gc.TUINT8, // same size
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TUINT8,
		// truncate
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = ppc64.AMOVBZ

	case gc.TINT16<<16 | gc.TINT16, // same size
		gc.TUINT16<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TINT16,
		// truncate
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16:
		a = ppc64.AMOVH

	case gc.TINT16<<16 | gc.TUINT16, // same size
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TUINT16,
		// truncate
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = ppc64.AMOVHZ

	case gc.TINT32<<16 | gc.TINT32, // same size
		gc.TUINT32<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TINT32,
		// truncate
		gc.TUINT64<<16 | gc.TINT32:
		a = ppc64.AMOVW

	case gc.TINT32<<16 | gc.TUINT32, // same size
		gc.TUINT32<<16 | gc.TUINT32,
		gc.TINT64<<16 | gc.TUINT32,
		gc.TUINT64<<16 | gc.TUINT32:
		a = ppc64.AMOVWZ

	case gc.TINT64<<16 | gc.TINT64, // same size
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = ppc64.AMOVD

		/*
		 * integer up-conversions
		 */
	case gc.TINT8<<16 | gc.TINT16, // sign extend int8
		gc.TINT8<<16 | gc.TUINT16,
		gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32,
		gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = ppc64.AMOVB

		goto rdst

	case gc.TUINT8<<16 | gc.TINT16, // zero extend uint8
		gc.TUINT8<<16 | gc.TUINT16,
		gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32,
		gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = ppc64.AMOVBZ

		goto rdst

	case gc.TINT16<<16 | gc.TINT32, // sign extend int16
		gc.TINT16<<16 | gc.TUINT32,
		gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = ppc64.AMOVH

		goto rdst

	case gc.TUINT16<<16 | gc.TINT32, // zero extend uint16
		gc.TUINT16<<16 | gc.TUINT32,
		gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = ppc64.AMOVHZ

		goto rdst

	case gc.TINT32<<16 | gc.TINT64, // sign extend int32
		gc.TINT32<<16 | gc.TUINT64:
		a = ppc64.AMOVW

		goto rdst

	case gc.TUINT32<<16 | gc.TINT64, // zero extend uint32
		gc.TUINT32<<16 | gc.TUINT64:
		a = ppc64.AMOVWZ

		goto rdst

		//warn("gmove: convert float to int not implemented: %N -> %N\n", f, t);
	//return;
	// algorithm is:
	//	if small enough, use native float64 -> int64 conversion.
	//	otherwise, subtract 2^63, convert, and add it back.
	/*
	* float to integer
	 */
	case gc.TFLOAT32<<16 | gc.TINT32,
		gc.TFLOAT64<<16 | gc.TINT32,
		gc.TFLOAT32<<16 | gc.TINT64,
		gc.TFLOAT64<<16 | gc.TINT64,
		gc.TFLOAT32<<16 | gc.TINT16,
		gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TUINT16,
		gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TINT16,
		gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TUINT16,
		gc.TFLOAT64<<16 | gc.TUINT8,
		gc.TFLOAT32<<16 | gc.TUINT32,
		gc.TFLOAT64<<16 | gc.TUINT32,
		gc.TFLOAT32<<16 | gc.TUINT64,
		gc.TFLOAT64<<16 | gc.TUINT64:
		bignodes()

		var r1 gc.Node
		gc.Regalloc(&r1, gc.Types[ft], f)
		gmove(f, &r1)
		if tt == gc.TUINT64 {
			gc.Regalloc(&r2, gc.Types[gc.TFLOAT64], nil)
			gmove(&bigf, &r2)
			gins(ppc64.AFCMPU, &r1, &r2)
			p1 := (*obj.Prog)(gc.Gbranch(optoas(gc.OLT, gc.Types[gc.TFLOAT64]), nil, +1))
			gins(ppc64.AFSUB, &r2, &r1)
			gc.Patch(p1, gc.Pc)
			gc.Regfree(&r2)
		}

		gc.Regalloc(&r2, gc.Types[gc.TFLOAT64], nil)
		var r3 gc.Node
		gc.Regalloc(&r3, gc.Types[gc.TINT64], t)
		gins(ppc64.AFCTIDZ, &r1, &r2)
		p1 := (*obj.Prog)(gins(ppc64.AFMOVD, &r2, nil))
		p1.To.Type = obj.TYPE_MEM
		p1.To.Reg = ppc64.REGSP
		p1.To.Offset = -8
		p1 = gins(ppc64.AMOVD, nil, &r3)
		p1.From.Type = obj.TYPE_MEM
		p1.From.Reg = ppc64.REGSP
		p1.From.Offset = -8
		gc.Regfree(&r2)
		gc.Regfree(&r1)
		if tt == gc.TUINT64 {
			p1 := (*obj.Prog)(gc.Gbranch(optoas(gc.OLT, gc.Types[gc.TFLOAT64]), nil, +1)) // use CR0 here again
			gc.Nodreg(&r1, gc.Types[gc.TINT64], ppc64.REGTMP)
			gins(ppc64.AMOVD, &bigi, &r1)
			gins(ppc64.AADD, &r1, &r3)
			gc.Patch(p1, gc.Pc)
		}

		gmove(&r3, t)
		gc.Regfree(&r3)
		return

		//warn("gmove: convert int to float not implemented: %N -> %N\n", f, t);
	//return;
	// algorithm is:
	//	if small enough, use native int64 -> uint64 conversion.
	//	otherwise, halve (rounding to odd?), convert, and double.
	/*
	 * integer to float
	 */
	case gc.TINT32<<16 | gc.TFLOAT32,
		gc.TINT32<<16 | gc.TFLOAT64,
		gc.TINT64<<16 | gc.TFLOAT32,
		gc.TINT64<<16 | gc.TFLOAT64,
		gc.TINT16<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT64,
		gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT64,
		gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT8<<16 | gc.TFLOAT64,
		gc.TUINT32<<16 | gc.TFLOAT32,
		gc.TUINT32<<16 | gc.TFLOAT64,
		gc.TUINT64<<16 | gc.TFLOAT32,
		gc.TUINT64<<16 | gc.TFLOAT64:
		bignodes()

		var r1 gc.Node
		gc.Regalloc(&r1, gc.Types[gc.TINT64], nil)
		gmove(f, &r1)
		if ft == gc.TUINT64 {
			gc.Nodreg(&r2, gc.Types[gc.TUINT64], ppc64.REGTMP)
			gmove(&bigi, &r2)
			gins(ppc64.ACMPU, &r1, &r2)
			p1 := (*obj.Prog)(gc.Gbranch(optoas(gc.OLT, gc.Types[gc.TUINT64]), nil, +1))
			p2 := (*obj.Prog)(gins(ppc64.ASRD, nil, &r1))
			p2.From.Type = obj.TYPE_CONST
			p2.From.Offset = 1
			gc.Patch(p1, gc.Pc)
		}

		gc.Regalloc(&r2, gc.Types[gc.TFLOAT64], t)
		p1 := (*obj.Prog)(gins(ppc64.AMOVD, &r1, nil))
		p1.To.Type = obj.TYPE_MEM
		p1.To.Reg = ppc64.REGSP
		p1.To.Offset = -8
		p1 = gins(ppc64.AFMOVD, nil, &r2)
		p1.From.Type = obj.TYPE_MEM
		p1.From.Reg = ppc64.REGSP
		p1.From.Offset = -8
		gins(ppc64.AFCFID, &r2, &r2)
		gc.Regfree(&r1)
		if ft == gc.TUINT64 {
			p1 := (*obj.Prog)(gc.Gbranch(optoas(gc.OLT, gc.Types[gc.TUINT64]), nil, +1)) // use CR0 here again
			gc.Nodreg(&r1, gc.Types[gc.TFLOAT64], ppc64.FREGTWO)
			gins(ppc64.AFMUL, &r1, &r2)
			gc.Patch(p1, gc.Pc)
		}

		gmove(&r2, t)
		gc.Regfree(&r2)
		return

		/*
		 * float to float
		 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = ppc64.AFMOVS

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = ppc64.AFMOVD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = ppc64.AFMOVS
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = ppc64.AFRSP
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	{
		gc.Regalloc(&r1, t.Type, t)

		gins(a, f, &r1)
		gmove(&r1, t)
		gc.Regfree(&r1)
		return
	}

	// requires register intermediate
hard:
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}
Пример #6
0
Файл: gsubr.go Проект: sreis/go
func floatmove_387(f *gc.Node, t *gc.Node) {
	var r1 gc.Node
	var a int

	ft := gc.Simsimtype(f.Type)
	tt := gc.Simsimtype(t.Type)
	cvt := t.Type

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		goto fatal

		/*
		* float to integer
		 */
	case gc.TFLOAT32<<16 | gc.TINT16,
		gc.TFLOAT32<<16 | gc.TINT32,
		gc.TFLOAT32<<16 | gc.TINT64,
		gc.TFLOAT64<<16 | gc.TINT16,
		gc.TFLOAT64<<16 | gc.TINT32,
		gc.TFLOAT64<<16 | gc.TINT64:
		if t.Op == gc.OREGISTER {
			goto hardmem
		}
		var r1 gc.Node
		gc.Nodreg(&r1, gc.Types[ft], x86.REG_F0)
		if f.Op != gc.OREGISTER {
			if ft == gc.TFLOAT32 {
				gins(x86.AFMOVF, f, &r1)
			} else {
				gins(x86.AFMOVD, f, &r1)
			}
		}

		// set round to zero mode during conversion
		var t1 gc.Node
		memname(&t1, gc.Types[gc.TUINT16])

		var t2 gc.Node
		memname(&t2, gc.Types[gc.TUINT16])
		gins(x86.AFSTCW, nil, &t1)
		gins(x86.AMOVW, ncon(0xf7f), &t2)
		gins(x86.AFLDCW, &t2, nil)
		if tt == gc.TINT16 {
			gins(x86.AFMOVWP, &r1, t)
		} else if tt == gc.TINT32 {
			gins(x86.AFMOVLP, &r1, t)
		} else {
			gins(x86.AFMOVVP, &r1, t)
		}
		gins(x86.AFLDCW, &t1, nil)
		return

		// convert via int32.
	case gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TUINT16,
		gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TUINT16,
		gc.TFLOAT64<<16 | gc.TUINT8:
		var t1 gc.Node
		gc.Tempname(&t1, gc.Types[gc.TINT32])

		gmove(f, &t1)
		switch tt {
		default:
			gc.Fatalf("gmove %v", t)

		case gc.TINT8:
			gins(x86.ACMPL, &t1, ncon(-0x80&(1<<32-1)))
			p1 := gc.Gbranch(optoas(gc.OLT, gc.Types[gc.TINT32]), nil, -1)
			gins(x86.ACMPL, &t1, ncon(0x7f))
			p2 := gc.Gbranch(optoas(gc.OGT, gc.Types[gc.TINT32]), nil, -1)
			p3 := gc.Gbranch(obj.AJMP, nil, 0)
			gc.Patch(p1, gc.Pc)
			gc.Patch(p2, gc.Pc)
			gmove(ncon(-0x80&(1<<32-1)), &t1)
			gc.Patch(p3, gc.Pc)
			gmove(&t1, t)

		case gc.TUINT8:
			gins(x86.ATESTL, ncon(0xffffff00), &t1)
			p1 := gc.Gbranch(x86.AJEQ, nil, +1)
			gins(x86.AMOVL, ncon(0), &t1)
			gc.Patch(p1, gc.Pc)
			gmove(&t1, t)

		case gc.TUINT16:
			gins(x86.ATESTL, ncon(0xffff0000), &t1)
			p1 := gc.Gbranch(x86.AJEQ, nil, +1)
			gins(x86.AMOVL, ncon(0), &t1)
			gc.Patch(p1, gc.Pc)
			gmove(&t1, t)
		}

		return

		// convert via int64.
	case gc.TFLOAT32<<16 | gc.TUINT32,
		gc.TFLOAT64<<16 | gc.TUINT32:
		cvt = gc.Types[gc.TINT64]

		goto hardmem

		/*
		 * integer to float
		 */
	case gc.TINT16<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT64,
		gc.TINT32<<16 | gc.TFLOAT32,
		gc.TINT32<<16 | gc.TFLOAT64,
		gc.TINT64<<16 | gc.TFLOAT32,
		gc.TINT64<<16 | gc.TFLOAT64:
		if t.Op != gc.OREGISTER {
			goto hard
		}
		if f.Op == gc.OREGISTER {
			cvt = f.Type
			goto hardmem
		}

		switch ft {
		case gc.TINT16:
			a = x86.AFMOVW

		case gc.TINT32:
			a = x86.AFMOVL

		default:
			a = x86.AFMOVV
		}

		// convert via int32 memory
	case gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT64,
		gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT8<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT32]

		goto hardmem

		// convert via int64 memory
	case gc.TUINT32<<16 | gc.TFLOAT32,
		gc.TUINT32<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT64]

		goto hardmem

		// The way the code generator uses floating-point
	// registers, a move from F0 to F0 is intended as a no-op.
	// On the x86, it's not: it pushes a second copy of F0
	// on the floating point stack. So toss it away here.
	// Also, F0 is the *only* register we ever evaluate
	// into, so we should only see register/register as F0/F0.
	/*
	 * float to float
	 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32,
		gc.TFLOAT64<<16 | gc.TFLOAT64:
		if gc.Ismem(f) && gc.Ismem(t) {
			goto hard
		}
		if f.Op == gc.OREGISTER && t.Op == gc.OREGISTER {
			if f.Reg != x86.REG_F0 || t.Reg != x86.REG_F0 {
				goto fatal
			}
			return
		}

		a = x86.AFMOVF
		if ft == gc.TFLOAT64 {
			a = x86.AFMOVD
		}
		if gc.Ismem(t) {
			if f.Op != gc.OREGISTER || f.Reg != x86.REG_F0 {
				gc.Fatalf("gmove %v", f)
			}
			a = x86.AFMOVFP
			if ft == gc.TFLOAT64 {
				a = x86.AFMOVDP
			}
		}

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		if gc.Ismem(f) && gc.Ismem(t) {
			goto hard
		}
		if f.Op == gc.OREGISTER && t.Op == gc.OREGISTER {
			if f.Reg != x86.REG_F0 || t.Reg != x86.REG_F0 {
				goto fatal
			}
			return
		}

		if f.Op == gc.OREGISTER {
			gins(x86.AFMOVDP, f, t)
		} else {
			gins(x86.AFMOVF, f, t)
		}
		return

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		if gc.Ismem(f) && gc.Ismem(t) {
			goto hard
		}
		if f.Op == gc.OREGISTER && t.Op == gc.OREGISTER {
			var r1 gc.Node
			gc.Tempname(&r1, gc.Types[gc.TFLOAT32])
			gins(x86.AFMOVFP, f, &r1)
			gins(x86.AFMOVF, &r1, t)
			return
		}

		if f.Op == gc.OREGISTER {
			gins(x86.AFMOVFP, f, t)
		} else {
			gins(x86.AFMOVD, f, t)
		}
		return
	}

	gins(a, f, t)
	return

	// requires register intermediate
hard:
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return

	// requires memory intermediate
hardmem:
	gc.Tempname(&r1, cvt)

	gmove(f, &r1)
	gmove(&r1, t)
	return

	// should not happen
fatal:
	gc.Fatalf("gmove %v -> %v", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))

	return
}
Пример #7
0
/*
 * generate move:
 *	t = f
 * hard part is conversions.
 */
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))
	}

	ft := gc.Simsimtype(f.Type)
	tt := gc.Simsimtype(t.Type)
	cvt := t.Type

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	// cannot have two memory operands
	var a int
	if gc.Ismem(f) && gc.Ismem(t) {
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		f.Convconst(&con, t.Type)
		f = &con
		ft = tt // so big switch will choose a simple mov

		// some constants can't move directly to memory.
		if gc.Ismem(t) {
			// float constants come from memory.
			if gc.Isfloat[tt] {
				goto hard
			}

			// 64-bit immediates are really 32-bit sign-extended
			// unless moving into a register.
			if gc.Isint[tt] {
				if i := con.Int(); int64(int32(i)) != i {
					goto hard
				}
			}
		}
	}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatal("gmove %v -> %v", gc.Tconv(f.Type, obj.FmtLong), gc.Tconv(t.Type, obj.FmtLong))

		/*
		 * integer copy and truncate
		 */
	case gc.TINT8<<16 | gc.TINT8, // same size
		gc.TINT8<<16 | gc.TUINT8,
		gc.TUINT8<<16 | gc.TINT8,
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TINT8,
		// truncate
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TUINT8,
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = x86.AMOVB

	case gc.TINT16<<16 | gc.TINT16, // same size
		gc.TINT16<<16 | gc.TUINT16,
		gc.TUINT16<<16 | gc.TINT16,
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TINT16,
		// truncate
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TUINT16,
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = x86.AMOVW

	case gc.TINT32<<16 | gc.TINT32, // same size
		gc.TINT32<<16 | gc.TUINT32,
		gc.TUINT32<<16 | gc.TINT32,
		gc.TUINT32<<16 | gc.TUINT32:
		a = x86.AMOVL

	case gc.TINT64<<16 | gc.TINT32, // truncate
		gc.TUINT64<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TUINT32,
		gc.TUINT64<<16 | gc.TUINT32:
		a = x86.AMOVQL

	case gc.TINT64<<16 | gc.TINT64, // same size
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = x86.AMOVQ

		/*
		 * integer up-conversions
		 */
	case gc.TINT8<<16 | gc.TINT16, // sign extend int8
		gc.TINT8<<16 | gc.TUINT16:
		a = x86.AMOVBWSX

		goto rdst

	case gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32:
		a = x86.AMOVBLSX
		goto rdst

	case gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = x86.AMOVBQSX
		goto rdst

	case gc.TUINT8<<16 | gc.TINT16, // zero extend uint8
		gc.TUINT8<<16 | gc.TUINT16:
		a = x86.AMOVBWZX

		goto rdst

	case gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32:
		a = x86.AMOVBLZX
		goto rdst

	case gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = x86.AMOVBQZX
		goto rdst

	case gc.TINT16<<16 | gc.TINT32, // sign extend int16
		gc.TINT16<<16 | gc.TUINT32:
		a = x86.AMOVWLSX

		goto rdst

	case gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = x86.AMOVWQSX
		goto rdst

	case gc.TUINT16<<16 | gc.TINT32, // zero extend uint16
		gc.TUINT16<<16 | gc.TUINT32:
		a = x86.AMOVWLZX

		goto rdst

	case gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = x86.AMOVWQZX
		goto rdst

	case gc.TINT32<<16 | gc.TINT64, // sign extend int32
		gc.TINT32<<16 | gc.TUINT64:
		a = x86.AMOVLQSX

		goto rdst

		// AMOVL into a register zeros the top of the register,
	// so this is not always necessary, but if we rely on AMOVL
	// the optimizer is almost certain to screw with us.
	case gc.TUINT32<<16 | gc.TINT64, // zero extend uint32
		gc.TUINT32<<16 | gc.TUINT64:
		a = x86.AMOVLQZX

		goto rdst

		/*
		* float to integer
		 */
	case gc.TFLOAT32<<16 | gc.TINT32:
		a = x86.ACVTTSS2SL

		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT32:
		a = x86.ACVTTSD2SL
		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT64:
		a = x86.ACVTTSS2SQ
		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT64:
		a = x86.ACVTTSD2SQ
		goto rdst

		// convert via int32.
	case gc.TFLOAT32<<16 | gc.TINT16,
		gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TUINT16,
		gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TINT16,
		gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TUINT16,
		gc.TFLOAT64<<16 | gc.TUINT8:
		cvt = gc.Types[gc.TINT32]

		goto hard

		// convert via int64.
	case gc.TFLOAT32<<16 | gc.TUINT32,
		gc.TFLOAT64<<16 | gc.TUINT32:
		cvt = gc.Types[gc.TINT64]

		goto hard

		// algorithm is:
	//	if small enough, use native float64 -> int64 conversion.
	//	otherwise, subtract 2^63, convert, and add it back.
	case gc.TFLOAT32<<16 | gc.TUINT64,
		gc.TFLOAT64<<16 | gc.TUINT64:
		a := x86.ACVTTSS2SQ

		if ft == gc.TFLOAT64 {
			a = x86.ACVTTSD2SQ
		}
		bignodes()
		var r1 gc.Node
		gc.Regalloc(&r1, gc.Types[ft], nil)
		var r2 gc.Node
		gc.Regalloc(&r2, gc.Types[tt], t)
		var r3 gc.Node
		gc.Regalloc(&r3, gc.Types[ft], nil)
		var r4 gc.Node
		gc.Regalloc(&r4, gc.Types[tt], nil)
		gins(optoas(gc.OAS, f.Type), f, &r1)
		gins(optoas(gc.OCMP, f.Type), &bigf, &r1)
		p1 := gc.Gbranch(optoas(gc.OLE, f.Type), nil, +1)
		gins(a, &r1, &r2)
		p2 := gc.Gbranch(obj.AJMP, nil, 0)
		gc.Patch(p1, gc.Pc)
		gins(optoas(gc.OAS, f.Type), &bigf, &r3)
		gins(optoas(gc.OSUB, f.Type), &r3, &r1)
		gins(a, &r1, &r2)
		gins(x86.AMOVQ, &bigi, &r4)
		gins(x86.AXORQ, &r4, &r2)
		gc.Patch(p2, gc.Pc)
		gmove(&r2, t)
		gc.Regfree(&r4)
		gc.Regfree(&r3)
		gc.Regfree(&r2)
		gc.Regfree(&r1)
		return

		/*
		 * integer to float
		 */
	case gc.TINT32<<16 | gc.TFLOAT32:
		a = x86.ACVTSL2SS

		goto rdst

	case gc.TINT32<<16 | gc.TFLOAT64:
		a = x86.ACVTSL2SD
		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT32:
		a = x86.ACVTSQ2SS
		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT64:
		a = x86.ACVTSQ2SD
		goto rdst

		// convert via int32
	case gc.TINT16<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT64,
		gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT64,
		gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT8<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT32]

		goto hard

		// convert via int64.
	case gc.TUINT32<<16 | gc.TFLOAT32,
		gc.TUINT32<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT64]

		goto hard

		// algorithm is:
	//	if small enough, use native int64 -> uint64 conversion.
	//	otherwise, halve (rounding to odd?), convert, and double.
	case gc.TUINT64<<16 | gc.TFLOAT32,
		gc.TUINT64<<16 | gc.TFLOAT64:
		a := x86.ACVTSQ2SS

		if tt == gc.TFLOAT64 {
			a = x86.ACVTSQ2SD
		}
		var zero gc.Node
		gc.Nodconst(&zero, gc.Types[gc.TUINT64], 0)
		var one gc.Node
		gc.Nodconst(&one, gc.Types[gc.TUINT64], 1)
		var r1 gc.Node
		gc.Regalloc(&r1, f.Type, f)
		var r2 gc.Node
		gc.Regalloc(&r2, t.Type, t)
		var r3 gc.Node
		gc.Regalloc(&r3, f.Type, nil)
		var r4 gc.Node
		gc.Regalloc(&r4, f.Type, nil)
		gmove(f, &r1)
		gins(x86.ACMPQ, &r1, &zero)
		p1 := gc.Gbranch(x86.AJLT, nil, +1)
		gins(a, &r1, &r2)
		p2 := gc.Gbranch(obj.AJMP, nil, 0)
		gc.Patch(p1, gc.Pc)
		gmove(&r1, &r3)
		gins(x86.ASHRQ, &one, &r3)
		gmove(&r1, &r4)
		gins(x86.AANDL, &one, &r4)
		gins(x86.AORQ, &r4, &r3)
		gins(a, &r3, &r2)
		gins(optoas(gc.OADD, t.Type), &r2, &r2)
		gc.Patch(p2, gc.Pc)
		gmove(&r2, t)
		gc.Regfree(&r4)
		gc.Regfree(&r3)
		gc.Regfree(&r2)
		gc.Regfree(&r1)
		return

		/*
		 * float to float
		 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = x86.AMOVSS

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = x86.AMOVSD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = x86.ACVTSS2SD
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = x86.ACVTSD2SS
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	{
		var r1 gc.Node
		gc.Regalloc(&r1, t.Type, t)

		gins(a, f, &r1)
		gmove(&r1, t)
		gc.Regfree(&r1)
		return
	}

	// requires register intermediate
hard:
	var r1 gc.Node
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}
Пример #8
0
Файл: gsubr.go Проект: 4ad/go
/*
 * generate move:
 *	t = f
 * hard part is conversions.
 */
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))
	}

	ft := int(gc.Simsimtype(f.Type))
	tt := int(gc.Simsimtype(t.Type))
	cvt := t.Type

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	// cannot have two memory operands
	var r2 gc.Node
	var r1 gc.Node
	var a int
	if gc.Ismem(f) && gc.Ismem(t) {
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		switch tt {
		default:
			f.Convconst(&con, t.Type)

		case gc.TINT32,
			gc.TINT16,
			gc.TINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(mips.AMOVV, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return

		case gc.TUINT32,
			gc.TUINT16,
			gc.TUINT8:
			var con gc.Node
			f.Convconst(&con, gc.Types[gc.TUINT64])
			var r1 gc.Node
			gc.Regalloc(&r1, con.Type, t)
			gins(mips.AMOVV, &con, &r1)
			gmove(&r1, t)
			gc.Regfree(&r1)
			return
		}

		f = &con
		ft = tt // so big switch will choose a simple mov

		// constants can't move directly to memory.
		if gc.Ismem(t) {
			goto hard
		}
	}

	// value -> value copy, first operand in memory.
	// any floating point operand requires register
	// src, so goto hard to copy to register first.
	if gc.Ismem(f) && ft != tt && (gc.Isfloat[ft] || gc.Isfloat[tt]) {
		cvt = gc.Types[ft]
		goto hard
	}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatalf("gmove %v -> %v", gc.Tconv(f.Type, obj.FmtLong), gc.Tconv(t.Type, obj.FmtLong))

		/*
		 * integer copy and truncate
		 */
	case gc.TINT8<<16 | gc.TINT8, // same size
		gc.TUINT8<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TINT8, // truncate
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8:
		a = mips.AMOVB

	case gc.TINT8<<16 | gc.TUINT8, // same size
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TUINT8, // truncate
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = mips.AMOVBU

	case gc.TINT16<<16 | gc.TINT16, // same size
		gc.TUINT16<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TINT16, // truncate
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16:
		a = mips.AMOVH

	case gc.TINT16<<16 | gc.TUINT16, // same size
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TUINT16, // truncate
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = mips.AMOVHU

	case gc.TINT32<<16 | gc.TINT32, // same size
		gc.TUINT32<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TINT32, // truncate
		gc.TUINT64<<16 | gc.TINT32:
		a = mips.AMOVW

	case gc.TINT32<<16 | gc.TUINT32, // same size
		gc.TUINT32<<16 | gc.TUINT32,
		gc.TINT64<<16 | gc.TUINT32, // truncate
		gc.TUINT64<<16 | gc.TUINT32:
		a = mips.AMOVWU

	case gc.TINT64<<16 | gc.TINT64, // same size
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = mips.AMOVV

		/*
		 * integer up-conversions
		 */
	case gc.TINT8<<16 | gc.TINT16, // sign extend int8
		gc.TINT8<<16 | gc.TUINT16,
		gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32,
		gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = mips.AMOVB

		goto rdst

	case gc.TUINT8<<16 | gc.TINT16, // zero extend uint8
		gc.TUINT8<<16 | gc.TUINT16,
		gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32,
		gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = mips.AMOVBU

		goto rdst

	case gc.TINT16<<16 | gc.TINT32, // sign extend int16
		gc.TINT16<<16 | gc.TUINT32,
		gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = mips.AMOVH

		goto rdst

	case gc.TUINT16<<16 | gc.TINT32, // zero extend uint16
		gc.TUINT16<<16 | gc.TUINT32,
		gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = mips.AMOVHU

		goto rdst

	case gc.TINT32<<16 | gc.TINT64, // sign extend int32
		gc.TINT32<<16 | gc.TUINT64:
		a = mips.AMOVW

		goto rdst

	case gc.TUINT32<<16 | gc.TINT64, // zero extend uint32
		gc.TUINT32<<16 | gc.TUINT64:
		a = mips.AMOVWU

		goto rdst

		//warn("gmove: convert float to int not implemented: %N -> %N\n", f, t);
	//return;
	// algorithm is:
	//	if small enough, use native float64 -> int64 conversion.
	//	otherwise, subtract 2^63, convert, and add it back.
	/*
	* float to integer
	 */
	case gc.TFLOAT32<<16 | gc.TINT32,
		gc.TFLOAT64<<16 | gc.TINT32,
		gc.TFLOAT32<<16 | gc.TINT64,
		gc.TFLOAT64<<16 | gc.TINT64,
		gc.TFLOAT32<<16 | gc.TINT16,
		gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TUINT16,
		gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TINT16,
		gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TUINT16,
		gc.TFLOAT64<<16 | gc.TUINT8,
		gc.TFLOAT32<<16 | gc.TUINT32,
		gc.TFLOAT64<<16 | gc.TUINT32,
		gc.TFLOAT32<<16 | gc.TUINT64,
		gc.TFLOAT64<<16 | gc.TUINT64:
		bignodes()

		gc.Regalloc(&r1, gc.Types[gc.TFLOAT64], nil)
		gmove(f, &r1)
		if tt == gc.TUINT64 {
			gc.Regalloc(&r2, gc.Types[gc.TFLOAT64], nil)
			gmove(&bigf, &r2)
			gins3(mips.ACMPGED, &r1, &r2, nil)
			p1 := gc.Gbranch(mips.ABFPF, nil, 0)
			gins(mips.ASUBD, &r2, &r1)
			gc.Patch(p1, gc.Pc)
			gc.Regfree(&r2)
		}

		gc.Regalloc(&r2, gc.Types[gc.TINT64], t)
		gins(mips.ATRUNCDV, &r1, &r1)
		gins(mips.AMOVV, &r1, &r2)
		gc.Regfree(&r1)

		if tt == gc.TUINT64 {
			p1 := gc.Gbranch(mips.ABFPF, nil, 0) // use FCR0 here again
			gc.Nodreg(&r1, gc.Types[gc.TINT64], mips.REGTMP)
			gmove(&bigi, &r1)
			gins(mips.AADDVU, &r1, &r2)
			gc.Patch(p1, gc.Pc)
		}

		gmove(&r2, t)
		gc.Regfree(&r2)
		return

		//warn("gmove: convert int to float not implemented: %N -> %N\n", f, t);
	//return;
	// algorithm is:
	//	if small enough, use native int64 -> float64 conversion.
	//	otherwise, halve (rounding to odd?), convert, and double.
	/*
	 * integer to float
	 */
	case gc.TINT32<<16 | gc.TFLOAT32,
		gc.TINT32<<16 | gc.TFLOAT64,
		gc.TINT64<<16 | gc.TFLOAT32,
		gc.TINT64<<16 | gc.TFLOAT64,
		gc.TINT16<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT64,
		gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT64,
		gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT8<<16 | gc.TFLOAT64,
		gc.TUINT32<<16 | gc.TFLOAT32,
		gc.TUINT32<<16 | gc.TFLOAT64,
		gc.TUINT64<<16 | gc.TFLOAT32,
		gc.TUINT64<<16 | gc.TFLOAT64:
		bignodes()

		var rtmp gc.Node
		gc.Regalloc(&r1, gc.Types[gc.TINT64], nil)
		gmove(f, &r1)
		if ft == gc.TUINT64 {
			gc.Nodreg(&rtmp, gc.Types[gc.TUINT64], mips.REGTMP)
			gmove(&bigi, &rtmp)
			gins(mips.AAND, &r1, &rtmp)
			p1 := ginsbranch(mips.ABEQ, nil, &rtmp, nil, 0)
			p2 := gins(mips.ASRLV, nil, &r1)
			p2.From.Type = obj.TYPE_CONST
			p2.From.Offset = 1
			gc.Patch(p1, gc.Pc)
		}

		gc.Regalloc(&r2, gc.Types[gc.TFLOAT64], t)
		gins(mips.AMOVV, &r1, &r2)
		gins(mips.AMOVVD, &r2, &r2)
		gc.Regfree(&r1)

		if ft == gc.TUINT64 {
			p1 := ginsbranch(mips.ABEQ, nil, &rtmp, nil, 0)
			gc.Nodreg(&r1, gc.Types[gc.TFLOAT64], mips.FREGTWO)
			gins(mips.AMULD, &r1, &r2)
			gc.Patch(p1, gc.Pc)
		}

		gmove(&r2, t)
		gc.Regfree(&r2)
		return

		/*
		 * float to float
		 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = mips.AMOVF

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = mips.AMOVD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = mips.AMOVFD
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = mips.AMOVDF
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	{
		gc.Regalloc(&r1, t.Type, t)

		gins(a, f, &r1)
		gmove(&r1, t)
		gc.Regfree(&r1)
		return
	}

	// requires register intermediate
hard:
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}
Пример #9
0
/*
 * generate move:
 *	t = f
 * hard part is conversions.
 */
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, obj.FmtLong), gc.Nconv(t, obj.FmtLong))
	}

	ft := int(gc.Simsimtype(f.Type))
	tt := int(gc.Simsimtype(t.Type))
	cvt := (*gc.Type)(t.Type)

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	// cannot have two memory operands
	var a int
	if gc.Ismem(f) && gc.Ismem(t) {
		if gmvc(f, t) {
			return
		}
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		f.Convconst(&con, t.Type)
		f = &con
		ft = tt // so big switch will choose a simple mov

		// some constants can't move directly to memory.
		if gc.Ismem(t) {
			// float constants come from memory.
			if gc.Isfloat[tt] {
				goto hard
			}

			// all immediates are 16-bit sign-extended
			// unless moving into a register.
			if gc.Isint[tt] {
				if i := con.Int(); int64(int16(i)) != i {
					goto hard
				}
			}
		}
	}

	// a float-to-int or int-to-float conversion requires the source operand in a register
	if gc.Ismem(f) && ((gc.Isfloat[ft] && gc.Isint[tt]) || (gc.Isint[ft] && gc.Isfloat[tt])) {
		cvt = (*gc.Type)(f.Type)
		goto hard
	}

	// a float32-to-float64 or float64-to-float32 conversion requires the source operand in a register
	if gc.Ismem(f) && gc.Isfloat[ft] && gc.Isfloat[tt] && (ft != tt) {
		cvt = (*gc.Type)(f.Type)
		goto hard
	}

	// float constants come from memory.
	//if(isfloat[tt])
	//	goto hard;

	// 64-bit immediates are also from memory.
	//if(isint[tt])
	//	goto hard;
	//// 64-bit immediates are really 32-bit sign-extended
	//// unless moving into a register.
	//if(isint[tt]) {
	//	if(mpcmpfixfix(con.val.u.xval, minintval[TINT32]) < 0)
	//		goto hard;
	//	if(mpcmpfixfix(con.val.u.xval, maxintval[TINT32]) > 0)
	//		goto hard;
	//}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.

	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatalf("gmove %v -> %v", gc.Tconv(f.Type, obj.FmtLong), gc.Tconv(t.Type, obj.FmtLong))

		/*
		 * integer copy and truncate
		 */
	case gc.TINT8<<16 | gc.TINT8, // same size
		gc.TUINT8<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TINT8,
		// truncate
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8:
		a = s390x.AMOVB

	case gc.TINT8<<16 | gc.TUINT8, // same size
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TUINT8,
		// truncate
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = s390x.AMOVBZ

	case gc.TINT16<<16 | gc.TINT16, // same size
		gc.TUINT16<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TINT16,
		// truncate
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16:
		a = s390x.AMOVH

	case gc.TINT16<<16 | gc.TUINT16, // same size
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TUINT16,
		// truncate
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = s390x.AMOVHZ

	case gc.TINT32<<16 | gc.TINT32, // same size
		gc.TUINT32<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TINT32,
		// truncate
		gc.TUINT64<<16 | gc.TINT32:
		a = s390x.AMOVW

	case gc.TINT32<<16 | gc.TUINT32, // same size
		gc.TUINT32<<16 | gc.TUINT32,
		gc.TINT64<<16 | gc.TUINT32,
		gc.TUINT64<<16 | gc.TUINT32:
		a = s390x.AMOVWZ

	case gc.TINT64<<16 | gc.TINT64, // same size
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = s390x.AMOVD

		/*
		 * integer up-conversions
		 */
	case gc.TINT8<<16 | gc.TINT16, // sign extend int8
		gc.TINT8<<16 | gc.TUINT16,
		gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32,
		gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = s390x.AMOVB

		goto rdst

	case gc.TUINT8<<16 | gc.TINT16, // zero extend uint8
		gc.TUINT8<<16 | gc.TUINT16,
		gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32,
		gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = s390x.AMOVBZ

		goto rdst

	case gc.TINT16<<16 | gc.TINT32, // sign extend int16
		gc.TINT16<<16 | gc.TUINT32,
		gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = s390x.AMOVH

		goto rdst

	case gc.TUINT16<<16 | gc.TINT32, // zero extend uint16
		gc.TUINT16<<16 | gc.TUINT32,
		gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = s390x.AMOVHZ

		goto rdst

	case gc.TINT32<<16 | gc.TINT64, // sign extend int32
		gc.TINT32<<16 | gc.TUINT64:
		a = s390x.AMOVW

		goto rdst

	case gc.TUINT32<<16 | gc.TINT64, // zero extend uint32
		gc.TUINT32<<16 | gc.TUINT64:
		a = s390x.AMOVWZ

		goto rdst

		/*
		 * float to integer
		 */
	case gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT32<<16 | gc.TUINT16:
		cvt = gc.Types[gc.TUINT32]

		goto hard

	case gc.TFLOAT32<<16 | gc.TUINT32:
		a = s390x.ACLFEBR

		goto rdst

	case gc.TFLOAT32<<16 | gc.TUINT64:
		a = s390x.ACLGEBR

		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TUINT16:
		cvt = gc.Types[gc.TUINT32]

		goto hard

	case gc.TFLOAT64<<16 | gc.TUINT32:
		a = s390x.ACLFDBR

		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT64:
		a = s390x.ACLGDBR

		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TINT16:
		cvt = gc.Types[gc.TINT32]

		goto hard

	case gc.TFLOAT32<<16 | gc.TINT32:
		a = s390x.ACFEBRA

		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT64:
		a = s390x.ACGEBRA

		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TINT16:
		cvt = gc.Types[gc.TINT32]

		goto hard

	case gc.TFLOAT64<<16 | gc.TINT32:
		a = s390x.ACFDBRA

		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT64:
		a = s390x.ACGDBRA

		goto rdst

		/*
		 * integer to float
		 */
	case gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT32:
		cvt = gc.Types[gc.TUINT32]

		goto hard

	case gc.TUINT32<<16 | gc.TFLOAT32:
		a = s390x.ACELFBR

		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT32:
		a = s390x.ACELGBR

		goto rdst

	case gc.TUINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TUINT32]

		goto hard

	case gc.TUINT32<<16 | gc.TFLOAT64:
		a = s390x.ACDLFBR

		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT64:
		a = s390x.ACDLGBR

		goto rdst

	case gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT32:
		cvt = gc.Types[gc.TINT32]

		goto hard

	case gc.TINT32<<16 | gc.TFLOAT32:
		a = s390x.ACEFBRA

		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT32:
		a = s390x.ACEGBRA

		goto rdst

	case gc.TINT8<<16 | gc.TFLOAT64,
		gc.TINT16<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT32]

		goto hard

	case gc.TINT32<<16 | gc.TFLOAT64:
		a = s390x.ACDFBRA

		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT64:
		a = s390x.ACDGBRA

		goto rdst

		/*
		 * float to float
		 */
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = s390x.AFMOVS

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = s390x.AFMOVD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = s390x.ALDEBR
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = s390x.AFRSP
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	{
		var r1 gc.Node
		gc.Regalloc(&r1, t.Type, t)

		gins(a, f, &r1)
		gmove(&r1, t)
		gc.Regfree(&r1)
		return
	}

	// requires register intermediate
hard:
	var r1 gc.Node
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}
Пример #10
0
// generate move:
//	t = f
// hard part is conversions.
func gmove(f *gc.Node, t *gc.Node) {
	if gc.Debug['M'] != 0 {
		fmt.Printf("gmove %v -> %v\n", gc.Nconv(f, gc.FmtLong), gc.Nconv(t, gc.FmtLong))
	}

	ft := int(gc.Simsimtype(f.Type))
	tt := int(gc.Simsimtype(t.Type))
	cvt := t.Type

	if gc.Iscomplex[ft] || gc.Iscomplex[tt] {
		gc.Complexmove(f, t)
		return
	}

	var a obj.As

	// cannot have two memory operands
	if gc.Ismem(f) && gc.Ismem(t) {
		if gmvc(f, t) {
			return
		}
		goto hard
	}

	// convert constant to desired type
	if f.Op == gc.OLITERAL {
		var con gc.Node
		f.Convconst(&con, t.Type)
		f = &con
		ft = tt // so big switch will choose a simple mov

		// some constants can't move directly to memory.
		if gc.Ismem(t) {
			// float constants come from memory.
			if t.Type.IsFloat() {
				goto hard
			}

			// all immediates are 16-bit sign-extended
			// unless moving into a register.
			if t.Type.IsInteger() {
				if i := con.Int64(); int64(int16(i)) != i {
					goto hard
				}
			}

			// immediate moves to memory have a 12-bit unsigned displacement
			if t.Xoffset < 0 || t.Xoffset >= 4096-8 {
				goto hard
			}
		}
	}

	// a float-to-int or int-to-float conversion requires the source operand in a register
	if gc.Ismem(f) && ((f.Type.IsFloat() && t.Type.IsInteger()) || (f.Type.IsInteger() && t.Type.IsFloat())) {
		cvt = f.Type
		goto hard
	}

	// a float32-to-float64 or float64-to-float32 conversion requires the source operand in a register
	if gc.Ismem(f) && f.Type.IsFloat() && t.Type.IsFloat() && (ft != tt) {
		cvt = f.Type
		goto hard
	}

	// value -> value copy, only one memory operand.
	// figure out the instruction to use.
	// break out of switch for one-instruction gins.
	// goto rdst for "destination must be register".
	// goto hard for "convert to cvt type first".
	// otherwise handle and return.
	switch uint32(ft)<<16 | uint32(tt) {
	default:
		gc.Fatalf("gmove %v -> %v", gc.Tconv(f.Type, gc.FmtLong), gc.Tconv(t.Type, gc.FmtLong))

	// integer copy and truncate
	case gc.TINT8<<16 | gc.TINT8,
		gc.TUINT8<<16 | gc.TINT8,
		gc.TINT16<<16 | gc.TINT8,
		gc.TUINT16<<16 | gc.TINT8,
		gc.TINT32<<16 | gc.TINT8,
		gc.TUINT32<<16 | gc.TINT8,
		gc.TINT64<<16 | gc.TINT8,
		gc.TUINT64<<16 | gc.TINT8:
		a = s390x.AMOVB

	case gc.TINT8<<16 | gc.TUINT8,
		gc.TUINT8<<16 | gc.TUINT8,
		gc.TINT16<<16 | gc.TUINT8,
		gc.TUINT16<<16 | gc.TUINT8,
		gc.TINT32<<16 | gc.TUINT8,
		gc.TUINT32<<16 | gc.TUINT8,
		gc.TINT64<<16 | gc.TUINT8,
		gc.TUINT64<<16 | gc.TUINT8:
		a = s390x.AMOVBZ

	case gc.TINT16<<16 | gc.TINT16,
		gc.TUINT16<<16 | gc.TINT16,
		gc.TINT32<<16 | gc.TINT16,
		gc.TUINT32<<16 | gc.TINT16,
		gc.TINT64<<16 | gc.TINT16,
		gc.TUINT64<<16 | gc.TINT16:
		a = s390x.AMOVH

	case gc.TINT16<<16 | gc.TUINT16,
		gc.TUINT16<<16 | gc.TUINT16,
		gc.TINT32<<16 | gc.TUINT16,
		gc.TUINT32<<16 | gc.TUINT16,
		gc.TINT64<<16 | gc.TUINT16,
		gc.TUINT64<<16 | gc.TUINT16:
		a = s390x.AMOVHZ

	case gc.TINT32<<16 | gc.TINT32,
		gc.TUINT32<<16 | gc.TINT32,
		gc.TINT64<<16 | gc.TINT32,
		gc.TUINT64<<16 | gc.TINT32:
		a = s390x.AMOVW

	case gc.TINT32<<16 | gc.TUINT32,
		gc.TUINT32<<16 | gc.TUINT32,
		gc.TINT64<<16 | gc.TUINT32,
		gc.TUINT64<<16 | gc.TUINT32:
		a = s390x.AMOVWZ

	case gc.TINT64<<16 | gc.TINT64,
		gc.TINT64<<16 | gc.TUINT64,
		gc.TUINT64<<16 | gc.TINT64,
		gc.TUINT64<<16 | gc.TUINT64:
		a = s390x.AMOVD

	// sign extend int8
	case gc.TINT8<<16 | gc.TINT16,
		gc.TINT8<<16 | gc.TUINT16,
		gc.TINT8<<16 | gc.TINT32,
		gc.TINT8<<16 | gc.TUINT32,
		gc.TINT8<<16 | gc.TINT64,
		gc.TINT8<<16 | gc.TUINT64:
		a = s390x.AMOVB
		goto rdst

	// sign extend uint8
	case gc.TUINT8<<16 | gc.TINT16,
		gc.TUINT8<<16 | gc.TUINT16,
		gc.TUINT8<<16 | gc.TINT32,
		gc.TUINT8<<16 | gc.TUINT32,
		gc.TUINT8<<16 | gc.TINT64,
		gc.TUINT8<<16 | gc.TUINT64:
		a = s390x.AMOVBZ
		goto rdst

	// sign extend int16
	case gc.TINT16<<16 | gc.TINT32,
		gc.TINT16<<16 | gc.TUINT32,
		gc.TINT16<<16 | gc.TINT64,
		gc.TINT16<<16 | gc.TUINT64:
		a = s390x.AMOVH
		goto rdst

	// zero extend uint16
	case gc.TUINT16<<16 | gc.TINT32,
		gc.TUINT16<<16 | gc.TUINT32,
		gc.TUINT16<<16 | gc.TINT64,
		gc.TUINT16<<16 | gc.TUINT64:
		a = s390x.AMOVHZ
		goto rdst

	// sign extend int32
	case gc.TINT32<<16 | gc.TINT64,
		gc.TINT32<<16 | gc.TUINT64:
		a = s390x.AMOVW
		goto rdst

	// zero extend uint32
	case gc.TUINT32<<16 | gc.TINT64,
		gc.TUINT32<<16 | gc.TUINT64:
		a = s390x.AMOVWZ
		goto rdst

	// float to integer
	case gc.TFLOAT32<<16 | gc.TUINT8,
		gc.TFLOAT32<<16 | gc.TUINT16:
		cvt = gc.Types[gc.TUINT32]
		goto hard

	case gc.TFLOAT32<<16 | gc.TUINT32:
		a = s390x.ACLFEBR
		goto rdst

	case gc.TFLOAT32<<16 | gc.TUINT64:
		a = s390x.ACLGEBR
		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT8,
		gc.TFLOAT64<<16 | gc.TUINT16:
		cvt = gc.Types[gc.TUINT32]
		goto hard

	case gc.TFLOAT64<<16 | gc.TUINT32:
		a = s390x.ACLFDBR
		goto rdst

	case gc.TFLOAT64<<16 | gc.TUINT64:
		a = s390x.ACLGDBR
		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT8,
		gc.TFLOAT32<<16 | gc.TINT16:
		cvt = gc.Types[gc.TINT32]
		goto hard

	case gc.TFLOAT32<<16 | gc.TINT32:
		a = s390x.ACFEBRA
		goto rdst

	case gc.TFLOAT32<<16 | gc.TINT64:
		a = s390x.ACGEBRA
		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT8,
		gc.TFLOAT64<<16 | gc.TINT16:
		cvt = gc.Types[gc.TINT32]
		goto hard

	case gc.TFLOAT64<<16 | gc.TINT32:
		a = s390x.ACFDBRA
		goto rdst

	case gc.TFLOAT64<<16 | gc.TINT64:
		a = s390x.ACGDBRA
		goto rdst

	// integer to float
	case gc.TUINT8<<16 | gc.TFLOAT32,
		gc.TUINT16<<16 | gc.TFLOAT32:
		cvt = gc.Types[gc.TUINT32]
		goto hard

	case gc.TUINT32<<16 | gc.TFLOAT32:
		a = s390x.ACELFBR
		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT32:
		a = s390x.ACELGBR
		goto rdst

	case gc.TUINT8<<16 | gc.TFLOAT64,
		gc.TUINT16<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TUINT32]
		goto hard

	case gc.TUINT32<<16 | gc.TFLOAT64:
		a = s390x.ACDLFBR
		goto rdst

	case gc.TUINT64<<16 | gc.TFLOAT64:
		a = s390x.ACDLGBR
		goto rdst

	case gc.TINT8<<16 | gc.TFLOAT32,
		gc.TINT16<<16 | gc.TFLOAT32:
		cvt = gc.Types[gc.TINT32]
		goto hard

	case gc.TINT32<<16 | gc.TFLOAT32:
		a = s390x.ACEFBRA
		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT32:
		a = s390x.ACEGBRA
		goto rdst

	case gc.TINT8<<16 | gc.TFLOAT64,
		gc.TINT16<<16 | gc.TFLOAT64:
		cvt = gc.Types[gc.TINT32]
		goto hard

	case gc.TINT32<<16 | gc.TFLOAT64:
		a = s390x.ACDFBRA
		goto rdst

	case gc.TINT64<<16 | gc.TFLOAT64:
		a = s390x.ACDGBRA
		goto rdst

	// float to float
	case gc.TFLOAT32<<16 | gc.TFLOAT32:
		a = s390x.AFMOVS

	case gc.TFLOAT64<<16 | gc.TFLOAT64:
		a = s390x.AFMOVD

	case gc.TFLOAT32<<16 | gc.TFLOAT64:
		a = s390x.ALDEBR
		goto rdst

	case gc.TFLOAT64<<16 | gc.TFLOAT32:
		a = s390x.ALEDBR
		goto rdst
	}

	gins(a, f, t)
	return

	// requires register destination
rdst:
	if t != nil && t.Op == gc.OREGISTER {
		gins(a, f, t)
		return
	} else {
		var r1 gc.Node
		gc.Regalloc(&r1, t.Type, t)

		gins(a, f, &r1)
		gmove(&r1, t)
		gc.Regfree(&r1)
		return
	}

	// requires register intermediate
hard:
	var r1 gc.Node
	gc.Regalloc(&r1, cvt, t)

	gmove(f, &r1)
	gmove(&r1, t)
	gc.Regfree(&r1)
	return
}