// Copyright 2016 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.

//go:build mips || mipsle

.file "gcc_mipsx.S"

/*

* void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)

*

* Calling into the gc tool chain, where all registers are caller save.

* Called from standard MIPS O32 ABI, where $16-$23, $30, and $f20-$f31

* are callee-save, so they must be saved explicitly, along with $31 (LR).

*/

.globl crosscall1

.set noat

crosscall1:

#ifndef __mips_soft_float

addiu $29, $29, -88

#else

addiu $29, $29, -40 // For soft-float, no need to make room for FP registers

#endif

sw $31, 0($29)

sw $16, 4($29)

sw $17, 8($29)

sw $18, 12($29)

sw $19, 16($29)

sw $20, 20($29)

sw $21, 24($29)

sw $22, 28($29)

sw $23, 32($29)

sw $30, 36($29)

#ifndef __mips_soft_float

sdc1 $f20, 40($29)

sdc1 $f22, 48($29)

sdc1 $f24, 56($29)

sdc1 $f26, 64($29)

sdc1 $f28, 72($29)

sdc1 $f30, 80($29)

#endif

move $20, $4 // save R4

move $4, $6

jalr $5 // call setg_gcc

jalr $20 // call fn

lw $16, 4($29)

lw $17, 8($29)

lw $18, 12($29)

lw $19, 16($29)

lw $20, 20($29)

lw $21, 24($29)

lw $22, 28($29)

lw $23, 32($29)

lw $30, 36($29)

#ifndef __mips_soft_float

ldc1 $f20, 40($29)

ldc1 $f22, 48($29)

ldc1 $f24, 56($29)

ldc1 $f26, 64($29)

ldc1 $f28, 72($29)

ldc1 $f30, 80($29)

#endif

lw $31, 0($29)

#ifndef __mips_soft_float

addiu $29, $29, 88

#else

addiu $29, $29, 40

#endif

jr $31

.set at

#ifdef __ELF__

.section .note.GNU-stack,"",%progbits

#endif