// save scratch register R31 first
	MOVD	R31, -184(R1)
	MOVD	0(R1), R31
	// save caller LR
	MOVD	R31, -304(R1)
	MOVD	-32(R1), R31
	// save argument frame size
	MOVD	R31, -192(R1)
	MOVD	LR, R31
	MOVD	R31, -320(R1)
	ADD	$-320, R1
	// save all registers that can contain pointers
	// and the CR register
	MOVW	CR, R31
	MOVD	R31, 8(R1)
	MOVD	R2, 24(R1)
	MOVD	R3, 56(R1)

			faultOnNilArg0: true,
			unsafePoint:    true,
		},

		// R31 is temp register
		// Loop code:
		//	MOVD len/32,R31		set up loop ctr
		//	MOVD R31,CTR
		//	MOVD $16,R31		index register
		// loop:
		//	LXVD2X (R0)(R4),VS32
		//	LXVD2X (R31)(R4),VS33
		//	ADD  R4,$32          increment src
		//	STXVD2X VS32,(R0)(R3)
		//	STXVD2X VS33,(R31)(R3)
		//	ADD  R3,$32          increment dst

	// are callee-save in the gcc calling convention, so save them.
	MOVW	R23, R8
	MOVW	g, R9
	MOVW	R31, R10 // this call frame does not save LR

	JAL	runtime·load_g(SB)
	MOVW	g_m(g), R1
	MOVW	m_curg(R1), R1
	MOVW	(g_stack+stack_hi)(R1), R2 // return value in R2

	MOVW	R8, R23
	MOVW	R9, g
	MOVW	R10, R31

	RET

// The top-most function running on a goroutine
// returns to goexit+PCQuantum.

	// should never return
	JAL	runtime·abort(SB)
	UNDEF

/*
 * support for morestack
 */

// Called during function prolog when more stack is needed.
// Caller has already loaded:
// loong64: R31: LR
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must

	// If no traceback support function, which means that
	// runtime/cgo was not linked in, do usual sigtramp.
	MOVD	_cgo_callers(SB), R6
	CMP	$0, R6
	BEQ	sigtramp

	// Inspect the g in TLS without clobbering R30/R31 via runtime.load_g.
	MOVD	runtime·tls_g(SB), R9
	MOVD	0(R9), R9

	// Figure out if we are currently in a cgo call.
	// If not, just do usual sigtramp.
	// compared to ARM64 and others.
	CMP	$0, R9

        }

        checkIdeaProject(ideaModel, originalIdeaModel)
    }

    // This test mostly reproduces `org.gradle.plugins.ide.tooling.r31.PersistentCompositeDependencySubstitutionCrossVersionSpec.ensures unique name for all Idea modules in composite`
    def "ensures unique name for all Idea modules in composite"() {
        singleProjectBuildInRootDir("buildA") {

				// the frame size is too large.  The link register must be saved
				// even for non-empty leaf functions so that traceback works.
				if autosize >= -BIG && autosize <= BIG {
					// Use MOVDU to adjust R1 when saving R31, if autosize is small.
					q = obj.Appendp(q, c.newprog)
					q.As = AMOVD
					q.Pos = p.Pos
					q.From.Type = obj.TYPE_REG
					q.From.Reg = REG_LR
					q.To.Type = obj.TYPE_REG
					q.To.Reg = REGTMP

	STP	(R23, R24), 19*8(RSP)
	STP	(R25, R26), 21*8(RSP)
	// R27 is temp register.
	// R28 is g.
	// R29 is frame pointer (unused).
	// R30 is LR, which was saved by the prologue.
	// R31 is SP.

	CALL	runtime·wbBufFlush(SB)
	LDP	1*8(RSP), (R2, R3)
	LDP	3*8(RSP), (R4, R5)
	LDP	5*8(RSP), (R6, R7)
	LDP	7*8(RSP), (R8, R9)
	LDP	9*8(RSP), (R10, R11)
	LDP	11*8(RSP), (R12, R13)