}

// perLoopStep is part of the encoding of loop-spanning control flow
// for function range iterators.  Each multiple of two encodes a "return false"
// passing control to an enclosing iterator; a terminal value of 1 encodes
// "return true" (i.e., local continue) from the body function, and a terminal
// value of 0 encodes executing the remainder of the body function.
const perLoopStep = 2

	if tw.err != nil {
		return 0, tw.err
	}
	n, err := tw.curr.ReadFrom(r)
	if err != nil && err != ErrWriteTooLong {
		tw.err = err
	}
	return n, err
}

// Close closes the tar archive by flushing the padding, and writing the footer.
// If the current file (from a prior call to [Writer.WriteHeader]) is not fully written,
// then this returns an error.
func (tw *Writer) Close() error {

		s.Call(v)
	case ssa.OpS390XCALLtail:
		s.TailCall(v)
	case ssa.OpS390XLoweredWB:
		p := s.Prog(obj.ACALL)
		p.To.Type = obj.TYPE_MEM
		p.To.Name = obj.NAME_EXTERN
		// AuxInt encodes how many buffer entries we need.
		p.To.Sym = ir.Syms.GCWriteBarrier[v.AuxInt-1]
	case ssa.OpS390XLoweredPanicBoundsA, ssa.OpS390XLoweredPanicBoundsB, ssa.OpS390XLoweredPanicBoundsC:
		p := s.Prog(obj.ACALL)

		// TODO: add size-mismatched indexed loads, like MOVBstoreidx4.

		// For storeconst ops, the AuxInt field encodes both
		// the value to store and an address offset of the store.
		// Cast AuxInt to a ValAndOff to extract Val and Off fields.

// Single quotes and double quotes are recognized to prevent splitting within the
// quoted region, and are removed from the resulting substrings. If a quote in s
// isn't closed err will be set and r will have the unclosed argument as the
// last element. The backslash is used for escaping.
//
// For example, the following string:
//
//	`a b:"c d" 'e''f'  "g\""`
//
// Would be parsed as:
//

			q.To.Type = obj.TYPE_REG
			q.To.Reg = ppc64.REG_R2
		}

	case ssa.OpPPC64LoweredWB:
		p := s.Prog(obj.ACALL)
		p.To.Type = obj.TYPE_MEM
		p.To.Name = obj.NAME_EXTERN
		// AuxInt encodes how many buffer entries we need.
		p.To.Sym = ir.Syms.GCWriteBarrier[v.AuxInt-1]

	case ssa.OpPPC64LoweredPanicBoundsA, ssa.OpPPC64LoweredPanicBoundsB, ssa.OpPPC64LoweredPanicBoundsC:
		p := s.Prog(obj.ACALL)

				// Tests of packages in the main module are in "all", in the sense that
				// they cause the packages they import to also be in "all". So are tests
				// of packages in "all" if "all" closes over test dependencies.
				testFlags |= pkgInAll
			}
			ld.pkgTest(ctx, pkg, testFlags)
		}
	}

	if new.has(pkgInAll) && !old.has(pkgInAll|pkgImportsLoaded) {

		{name: "BSRL", argLength: 1, reg: gp11, asm: "BSRL", typ: "UInt32", clobberFlags: true}, // # of high-order zeroes in 32-bit arg

		// CMOV instructions: 64, 32 and 16-bit sizes.
		// if arg2 encodes a true result, return arg1, else arg0
		{name: "CMOVQEQ", argLength: 3, reg: gp21, asm: "CMOVQEQ", resultInArg0: true},
		{name: "CMOVQNE", argLength: 3, reg: gp21, asm: "CMOVQNE", resultInArg0: true},

	tailCall          bool      // is a tail call
	nilCheck          bool      // this op is a nil check on arg0
	faultOnNilArg0    bool      // this op will fault if arg0 is nil (and aux encodes a small offset)
	faultOnNilArg1    bool      // this op will fault if arg1 is nil (and aux encodes a small offset)
	usesScratch       bool      // this op requires scratch memory space
	hasSideEffects    bool      // for "reasons", not to be eliminated.  E.g., atomic store, #19182.

}

type regInfo struct {
	// inputs[i] encodes the set of registers allowed for the i'th input.
	// Inputs that don't use registers (flags, memory, etc.) should be 0.
	inputs []regMask
	// clobbers encodes the set of registers that are overwritten by
	// the instruction (other than the output registers).
	clobbers regMask
	// outputs[i] encodes the set of registers allowed for the i'th output.
	outputs []regMask
}