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// Copyright 2015 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"
// Called by C code generated by cmd/cgo.
// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
// Saves C callee-saved registers and calls cgocallback with three arguments.
// fn is the PC of a func(a unsafe.Pointer) function.
TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
/*
* We still need to save all callee save register as before, and then
* push 3 args for fn (R0, R1, R3), skipping R2.
* Also note that at procedure entry in gc world, 8(RSP) will be the
* first arg.
* TODO(minux): use LDP/STP here if it matters.
*/
SUB $(8*24), RSP
MOVD R0, (8*1)(RSP)
MOVD R1, (8*2)(RSP)
MOVD R3, (8*3)(RSP)
MOVD R19, (8*4)(RSP)
MOVD R20, (8*5)(RSP)
MOVD R21, (8*6)(RSP)
MOVD R22, (8*7)(RSP)
MOVD R23, (8*8)(RSP)
MOVD R24, (8*9)(RSP)
MOVD R25, (8*10)(RSP)
MOVD R26, (8*11)(RSP)
MOVD R27, (8*12)(RSP)
MOVD g, (8*13)(RSP)
MOVD R29, (8*14)(RSP)
MOVD R30, (8*15)(RSP)
FMOVD F8, (8*16)(RSP)
FMOVD F9, (8*17)(RSP)
FMOVD F10, (8*18)(RSP)
FMOVD F11, (8*19)(RSP)
FMOVD F12, (8*20)(RSP)
FMOVD F13, (8*21)(RSP)
FMOVD F14, (8*22)(RSP)
FMOVD F15, (8*23)(RSP)
// Initialize Go ABI environment
BL runtime·load_g(SB)
BL runtime·cgocallback(SB)
MOVD (8*4)(RSP), R19
MOVD (8*5)(RSP), R20
MOVD (8*6)(RSP), R21
MOVD (8*7)(RSP), R22
MOVD (8*8)(RSP), R23
MOVD (8*9)(RSP), R24
MOVD (8*10)(RSP), R25
MOVD (8*11)(RSP), R26
MOVD (8*12)(RSP), R27
MOVD (8*13)(RSP), g
MOVD (8*14)(RSP), R29
MOVD (8*15)(RSP), R30
FMOVD (8*16)(RSP), F8
FMOVD (8*17)(RSP), F9
FMOVD (8*18)(RSP), F10
FMOVD (8*19)(RSP), F11
FMOVD (8*20)(RSP), F12
FMOVD (8*21)(RSP), F13
FMOVD (8*22)(RSP), F14
FMOVD (8*23)(RSP), F15
ADD $(8*24), RSP
RET
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