MOVD	a3+24(FP), R5
	MOVD	R0, R6
	MOVD	R0, R7
	MOVD	R0, R8
	MOVD	trap+0(FP), R9	// syscall entry
	SYSCALL R9
	MOVD	R3, r1+32(FP)
	MOVD	R4, r2+40(FP)
	BL	runtime·exitsyscall(SB)
	RET

TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
	MOVD	a1+8(FP), R3
	MOVD	a2+16(FP), R4
	MOVD	a3+24(FP), R5
	MOVD	R0, R6
	MOVD	R0, R7
	MOVD	R0, R8
	MOVD	trap+0(FP), R9	// syscall entry
	SYSCALL R9
	MOVD	R3, r1+32(FP)

	print("r2   ", hex(r.r2), "\n")
	print("r3   ", hex(r.r3), "\n")
	print("r4   ", hex(r.r4), "\n")
	print("r5   ", hex(r.r5), "\n")
	print("r6   ", hex(r.r6), "\n")
	print("r7   ", hex(r.r7), "\n")
	print("r8   ", hex(r.r8), "\n")
	print("r9   ", hex(r.r9), "\n")
	print("r10  ", hex(r.r10), "\n")
	print("r11  ", hex(r.r11), "\n")
	print("r12  ", hex(r.r12), "\n")
	print("sp   ", hex(r.spr), "\n")
	print("lr   ", hex(r.lrr), "\n")

 */
.globl crosscall1
crosscall1:
	push {r4, r5, r6, r7, r8, r9, r10, r11, ip, lr}
	mov r4, r0
	mov r5, r1
	mov r0, r2

	// Because the assembler might target an earlier revision of the ISA
	// by default, we encode BLX as a .word.
	.word 0xe12fff35 // blx r5 // setg(g)
	.word 0xe12fff34 // blx r4 // fn()

	pop {r4, r5, r6, r7, r8, r9, r10, r11, ip, pc}


#ifdef __ELF__

	print("rsi     ", hex(r.rsi), "\n")
	print("rbp     ", hex(r.rbp), "\n")
	print("rsp     ", hex(r.rsp), "\n")
	print("r8      ", hex(r.r8), "\n")
	print("r9      ", hex(r.r9), "\n")
	print("r10     ", hex(r.r10), "\n")
	print("r11     ", hex(r.r11), "\n")
	print("r12     ", hex(r.r12), "\n")
	print("r13     ", hex(r.r13), "\n")
	print("r14     ", hex(r.r14), "\n")
	print("r15     ", hex(r.r15), "\n")

TEXT ·rawVforkSyscall(SB),NOSPLIT,$0-48
	MOVD	a1+8(FP), R0
	MOVD	a2+16(FP), R1
	MOVD	a3+24(FP), R2
	MOVD	$0, R3
	MOVD	$0, R4
	MOVD	$0, R5
	MOVD	trap+0(FP), R8	// syscall entry
	SVC
	CMN	$4095, R0
	BCC	ok
	MOVD	$-1, R4
	MOVD	R4, r1+32(FP)	// r1
	NEG	R0, R0
	MOVD	R0, err+40(FP)	// errno
	RET
ok:
	MOVD	R0, r1+32(FP)	// r1
	MOVD	ZR, err+40(FP)	// errno
	RET

	MOVD msg_base+8(FP), R4
	MOVD msg_len+16(FP), R5

	MOVD 0(R3), R8   // h0
	MOVD 8(R3), R9   // h1
	MOVD 16(R3), R10 // h2
	MOVD 24(R3), R11 // r0
	MOVD 32(R3), R12 // r1

	CMP R5, $16
	BLT bytes_between_0_and_15

loop:
	POLY1305_ADD(R4, R8, R9, R10, R20, R21, R22)

	PCALIGN $16
multiply:
	POLY1305_MUL(R8, R9, R10, R11, R12, R16, R17, R18, R14, R20, R21)
	ADD $-16, R5
	CMP R5, $16
	BGE loop

			"\tMOVBLZX	(BP)(DX*4),	R8 \\",
			"\tload((off+1), r2) \\",
			"\tMOVB	R8,		(off*4)(R12) \\",
			"\tPINSRW	$index, (BP)(R8*4), xmm",
			"#define LOAD(off, reg) \\",
			"\tMOVBLZX	(off*4)(R12),	reg \\",
			"\tADDB	reg,		DX",
			"KEYROUND(X0, LOAD, 8, AX, BX, 0)",
		),

	SYSCALL
	JCC	2(PC)
	NEGQ	AX
	MOVL	AX, ret+24(FP)
	RET

TEXT runtime·lwp_tramp(SB),NOSPLIT,$0

	// Set FS to point at m->tls.
	LEAQ	m_tls(R8), DI
	CALL	runtime·settls(SB)

	// Set up new stack.
	get_tls(CX)
	MOVQ	R8, g_m(R9)
	MOVQ	R9, g(CX)
	CALL	runtime·stackcheck(SB)

	// Call fn. This is an ABI0 PC.
	CALL	R12

	// It shouldn't return. If it does, exit.
	MOVL	$SYS__lwp_exit, AX

TEXT ·Syscall6(SB),NOSPLIT,$0-80
	JMP	syscall·Syscall6(SB)

TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
	JAL	runtime·entersyscall(SB)
	MOVV	a1+8(FP), R4
	MOVV	a2+16(FP), R5
	MOVV	a3+24(FP), R6
	MOVV	R0, R7
	MOVV	R0, R8
	MOVV	R0, R9
	MOVV	trap+0(FP), R2	// syscall entry
	SYSCALL
	MOVV	R2, r1+32(FP)
	MOVV	R3, r2+40(FP)
	JAL	runtime·exitsyscall(SB)
	RET

TEXT ·RawSyscall(SB),NOSPLIT,$0-56
	JMP	syscall·RawSyscall(SB)

// of the args of the ANDQ needs to be saved so it can be used as the arg to TESTQ.
func andWithUse(x, y int) int {
	z := x & y
	// amd64:`TESTQ\s(AX, AX|BX, BX|CX, CX|DX, DX|SI, SI|DI, DI|R8, R8|R9, R9|R10, R10|R11, R11|R12, R12|R13, R13|R15, R15)`
	if z == 0 {
		return 77
	}
	// use z by returning it
	return z
}

// Verify (OR x (NOT y)) rewrites to (ORN x y) where supported