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Text file src/runtime/cgo/asm_mips64x.s

Documentation: runtime/cgo

     1	// Copyright 2016 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build mips64 mips64le
     6	
     7	#include "textflag.h"
     8	
     9	/*
    10	 * void crosscall2(void (*fn)(void*, int32, uintptr), void*, int32, uintptr)
    11	 * Save registers and call fn with two arguments.
    12	 */
    13	TEXT crosscall2(SB),NOSPLIT,$-8
    14		/*
    15		 * We still need to save all callee save register as before, and then
    16		 *  push 3 args for fn (R5, R6, R7).
    17		 * Also note that at procedure entry in gc world, 8(R29) will be the
    18		 *  first arg.
    19		 */
    20		ADDV	$(-8*23), R29
    21		MOVV	R5, (8*1)(R29) // void*
    22		MOVW	R6, (8*2)(R29) // int32
    23		MOVV	R7, (8*3)(R29) // uintptr
    24		MOVV	R16, (8*4)(R29)
    25		MOVV	R17, (8*5)(R29)
    26		MOVV	R18, (8*6)(R29)
    27		MOVV	R19, (8*7)(R29)
    28		MOVV	R20, (8*8)(R29)
    29		MOVV	R21, (8*9)(R29)
    30		MOVV	R22, (8*10)(R29)
    31		MOVV	R23, (8*11)(R29)
    32		MOVV	RSB, (8*12)(R29)
    33		MOVV	g, (8*13)(R29)
    34		MOVV	R31, (8*14)(R29)
    35		MOVD	F24, (8*15)(R29)
    36		MOVD	F25, (8*16)(R29)
    37		MOVD	F26, (8*17)(R29)
    38		MOVD	F27, (8*18)(R29)
    39		MOVD	F28, (8*19)(R29)
    40		MOVD	F29, (8*20)(R29)
    41		MOVD	F30, (8*21)(R29)
    42		MOVD	F31, (8*22)(R29)
    43	
    44		// Initialize Go ABI environment
    45		// prepare SB register = PC & 0xffffffff00000000
    46		BGEZAL	R0, 1(PC)
    47		SRLV	$32, R31, RSB
    48		SLLV	$32, RSB
    49		JAL	runtime·load_g(SB)
    50		JAL	(R4)
    51	
    52		MOVV	(8*4)(R29), R16
    53		MOVV	(8*5)(R29), R17
    54		MOVV	(8*6)(R29), R18
    55		MOVV	(8*7)(R29), R19
    56		MOVV	(8*8)(R29), R20
    57		MOVV	(8*9)(R29), R21
    58		MOVV	(8*10)(R29), R22
    59		MOVV	(8*11)(R29), R23
    60		MOVV	(8*12)(R29), RSB
    61		MOVV	(8*13)(R29), g
    62		MOVV	(8*14)(R29), R31
    63		MOVD	(8*15)(R29), F24
    64		MOVD	(8*16)(R29), F25
    65		MOVD	(8*17)(R29), F26
    66		MOVD	(8*18)(R29), F27
    67		MOVD	(8*19)(R29), F28
    68		MOVD	(8*20)(R29), F29
    69		MOVD	(8*21)(R29), F30
    70		MOVD	(8*22)(R29), F31
    71		ADDV	$(8*23), R29
    72		RET

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