return;
					}
					this.mem.setFloat64(addr, v, true);
					return;
				}

				if (v === undefined) {
					this.mem.setFloat64(addr, 0, true);
					return;
				}

				let id = this._ids.get(v);
				if (id === undefined) {
					id = this._idPool.pop();
					if (id === undefined) {
						id = this._values.length;
					}
					this._values[id] = v;
					this._goRefCounts[id] = 0;

	BCL 20,undefined_symbol,LR      // BCL $20,CR0LT,LR // 4e800021
	BCL 20,undefined_symbol+1,LR    // BCL $20,CR0GT,LR // 4e810021

	// Verify the supported forms of bcctr[l]
	BC $20,CR0LT,CTR                // 4e800420
	BC $20,CR0GT,CTR                // 4e810420
	BC 20,CR0LT,CTR                 // BC $20,CR0LT,CTR // 4e800420
	BC 20,undefined_symbol,CTR      // BC $20,CR0LT,CTR // 4e800420

	<preamble>
	#line 1 "not-declared"
	void __cgo_f_1_1(void) { __typeof__(foo) *__cgo_undefined__1; }
	#line 1 "not-type"
	void __cgo_f_1_2(void) { foo *__cgo_undefined__2; }
	#line 1 "not-int-const"
	void __cgo_f_1_3(void) { enum { __cgo_undefined__3 = (foo)*1 }; }
	#line 1 "not-num-const"
	void __cgo_f_1_4(void) { static const double __cgo_undefined__4 = (foo); }
	#line 1 "not-str-lit"

		{"VADDPD.SAE.SAE X0, X1, X2", `duplicate suffix "SAE"`},
		{"VADDPD.RZ_SAE.SAE X0, X1, X2", `bad suffix combination`},

		// BSWAP on 16-bit registers is undefined. See #29167,
		{"BSWAPW DX", `unrecognized instruction`},
		{"BSWAPW R11", `unrecognized instruction`},
	})
}

func testBadInstParser(t *testing.T, goarch string, tests []badInstTest) {
	for i, test := range tests {

	//	void __cgo_f_xxx_1(void) { __typeof__(name) *__cgo_undefined__1; }
	//	#line xxx "not-type"
	//	void __cgo_f_xxx_2(void) { name *__cgo_undefined__2; }
	//	#line xxx "not-int-const"
	//	void __cgo_f_xxx_3(void) { enum { __cgo_undefined__3 = (name)*1 }; }
	//	#line xxx "not-num-const"
	//	void __cgo_f_xxx_4(void) { static const double __cgo_undefined__4 = (name); }
	//	#line xxx "not-str-lit"

			return TrimLeft, nil
		case "TrimRight":
			return TrimRight, nil
		case "TrimPrefix":
			return nil, TrimPrefix
		case "TrimSuffix":
			return nil, TrimSuffix
		default:
			t.Errorf("Undefined trim function %s", name)
			return nil, nil
		}
	}

	for _, tc := range trimTests {
		name := tc.f
		f, fb := toFn(name)
		if f == nil && fb == nil {
			continue
		}

	}
}

// #ifdef and #ifndef processing.
func (in *Input) ifdef(truth bool) {
	name := in.macroName()
	in.expectNewline("#if[n]def")
	if !in.enabled() {
		truth = false
	} else if _, defined := in.macros[name]; !defined {
		truth = !truth
	}
	in.ifdefStack = append(in.ifdefStack, truth)
}

// #else processing
func (in *Input) else_() {
	in.expectNewline("#else")
	if len(in.ifdefStack) == 0 {

// instruction set, to minimize its interaction with the core of the
// assembler.

package arch

import (
	"cmd/internal/obj"
	"cmd/internal/obj/riscv"
)

// IsRISCV64AMO reports whether the op (as defined by a riscv.A*
// constant) is one of the AMO instructions that requires special
// handling.
func IsRISCV64AMO(op obj.As) bool {
	switch op {

memory move and subroutine call and return are more abstract.
The details vary with architecture, and we apologize for the imprecision; the situation is not well-defined.
</p>

<p>
The assembler program is a way to parse a description of that
semi-abstract instruction set and turn it into instructions to be
input to the linker.

	// FormatUnknown indicates that the format is unknown.
	FormatUnknown

	// The format of the original Unix V7 tar tool prior to standardization.
	formatV7

	// FormatUSTAR represents the USTAR header format defined in POSIX.1-1988.
	//
	// While this format is compatible with most tar readers,
	// the format has several limitations making it unsuitable for some usages.