// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

TEXT _rt0_arm_android(SB),NOSPLIT|NOFRAME,$0
	MOVW		(R13), R0      // argc
	MOVW		$4(R13), R1    // argv
	MOVW		$_rt0_arm_linux1(SB), R4
	B		(R4)

TEXT _rt0_arm_android_lib(SB),NOSPLIT,$0
	MOVW	$1, R0                          // argc

//go:build linux && (ppc64 || ppc64le)

#include "textflag.h"

//
// System calls for ppc64, Linux
//

// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$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
	BVC	ok
	MOVD	$-1, R4
	MOVD	R4, r1+32(FP)	// r1

	switch len(ci.frames) {
	case 0: // In the rare case when there are no frames at all, we return Frame{}.
		return
	case 1:
		frame = ci.frames[0]
		ci.frames = ci.frameStore[:0]
	case 2:
		frame = ci.frames[0]
		ci.frameStore[0] = ci.frames[1]
		ci.frames = ci.frameStore[:1]
	default:
		frame = ci.frames[0]
		ci.frames = ci.frames[1:]
	}

// Code generated by mkpreempt.go; DO NOT EDIT.

#include "go_asm.h"
#include "textflag.h"

TEXT ·asyncPreempt(SB),NOSPLIT|NOFRAME,$0-0
	PUSHFL
	ADJSP $156
	NOP SP
	MOVL AX, 0(SP)
	MOVL CX, 4(SP)
	MOVL DX, 8(SP)
	MOVL BX, 12(SP)
	MOVL BP, 16(SP)
	MOVL SI, 20(SP)
	MOVL DI, 24(SP)
	#ifndef GO386_softfloat
	MOVUPS X0, 28(SP)
	MOVUPS X1, 44(SP)
	MOVUPS X2, 60(SP)
	MOVUPS X3, 76(SP)
	MOVUPS X4, 92(SP)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build gc

#include "textflag.h"

TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
	// Save link register
	MOVD	R30, R9

	// Rewind stack pointer so anything that happens on the stack
	// will clobber the test pattern created by the caller
	ADD	$(1024 * 8), RSP

	// Ask signaller to setgid

#define RM	R3
#define Ra	R11

// Be careful: Ra == R11 will be used by the linker for synthesized instructions.
// Note: this function does not have a frame.
TEXT runtime·udiv(SB),NOSPLIT|NOFRAME,$0
	MOVBU	internal∕cpu·ARM+const_offsetARMHasIDIVA(SB), Ra
	CMP	$0, Ra
	BNE	udiv_hardware

	CLZ 	Rq, Rs // find normalizing shift
	MOVW.S	Rq<<Rs, Ra
	MOVW	$fast_udiv_tab<>-64(SB), RM

TEXT ·addMulVVW1536(SB), $0-16
	MOVW	$48, R5
	JMP		addMulVVWx(SB)

// func addMulVVW2048(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW2048(SB), $0-16
	MOVW	$64, R5
	JMP		addMulVVWx(SB)

TEXT addMulVVWx(SB), NOFRAME|NOSPLIT, $0
	MOVW	$0, R0
	MOVW	z+0(FP), R1
	MOVW	x+4(FP), R2
	MOVW	y+8(FP), R3
	ADD	R5<<2, R1, R5
	MOVW	$0, R4
	B E9

L9:	MOVW.P	4(R2), R6
	MULLU	R6, R3, (R7, R6)
	ADD.S	R4, R6
	ADC	R0, R7

	MOVW	flags+0(FP), R1
	MOVW	$SYS_pipe2, R7
	SWI	$0
	MOVW	R0, errno+12(FP)
	RET

TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
	MOVW	code+0(FP), R0
	MOVW	$SYS_exit_group, R7
	SWI	$0
	MOVW	$1234, R0
	MOVW	$1002, R1
	MOVW	R0, (R1)	// fail hard

TEXT exit1<>(SB),NOSPLIT|NOFRAME,$0
	MOVW	code+0(FP), R0
	MOVW	$SYS_exit, R7
	SWI	$0
	MOVW	$1234, R0
	MOVW	$1003, R1
	MOVW	R0, (R1)	// fail hard

//       doc: https://www.ibm.com/support/knowledgecenter/en/SSLTBW_3.1.0/com.ibm.zos.v3r1.bpxb100/bpx2cr_List_of_offsets.htm
//
// func bpxcall(plist []unsafe.Pointer, bpx_offset int64)

TEXT ·bpxcall(SB), NOSPLIT|NOFRAME, $0
	MOVD  plist_base+0(FP), R1  // r1 points to plist
	MOVD  bpx_offset+24(FP), R2 // r2 offset to BPX vector table
	MOVD  R14, R7               // save r14
	MOVD  R15, R8               // save r15
	MOVWZ 16(R0), R9

	CMP	$0, R0
	BEQ	3(PC)
	ADD	$1, R2
	B	-4(PC)
	SUB	R1, R2
	MOVW	R2, ret_len+4(FP)
	RET

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// never called (cgo not supported)
TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	MOVW	$0, R0
	MOVW	R0, (R0)