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// 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.
// +build mips mipsle
/*
* 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
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