github.com/mtsmfm/go/src@v0.0.0-20221020090648-44bdcb9f8fde/runtime/cgo/gcc_loong64.S (about)

     1  // Copyright 2022 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  /*
     6   * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
     7   *
     8   * Calling into the gc tool chain, where all registers are caller save.
     9   * Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31
    10   * are callee-save, so they must be saved explicitly, along with $r1 (LR).
    11   */
    12  .globl crosscall1
    13  crosscall1:
    14  	addi.d	$r3, $r3, -160
    15  	st.d	$r1, $r3, 0
    16  	st.d	$r23, $r3, 8
    17  	st.d	$r24, $r3, 16
    18  	st.d	$r25, $r3, 24
    19  	st.d	$r26, $r3, 32
    20  	st.d	$r27, $r3, 40
    21  	st.d	$r28, $r3, 48
    22  	st.d	$r29, $r3, 56
    23  	st.d	$r30, $r3, 64
    24  	st.d	$r2, $r3, 72
    25  	st.d	$r22, $r3, 80
    26  	fst.d	$f24, $r3, 88
    27  	fst.d	$f25, $r3, 96
    28  	fst.d	$f26, $r3, 104
    29  	fst.d	$f27, $r3, 112
    30  	fst.d	$f28, $r3, 120
    31  	fst.d	$f29, $r3, 128
    32  	fst.d	$f30, $r3, 136
    33  	fst.d	$f31, $r3, 144
    34  
    35  	move	$r18, $r4 // save R4
    36  	move	$r19, $r6
    37  	jirl	$r1, $r5, 0	// call setg_gcc (clobbers R4)
    38  	jirl	$r1, $r18, 0	// call fn
    39  
    40  	ld.d	$r23, $r3, 8
    41  	ld.d	$r24, $r3, 16
    42  	ld.d	$r25, $r3, 24
    43  	ld.d	$r26, $r3, 32
    44  	ld.d	$r27, $r3, 40
    45  	ld.d	$r28, $r3, 48
    46  	ld.d	$r29, $r3, 56
    47  	ld.d	$r30, $r3, 64
    48  	ld.d	$r2, $r3, 72
    49  	ld.d	$r22, $r3, 80
    50  	fld.d	$f24, $r3, 88
    51  	fld.d	$f25, $r3, 96
    52  	fld.d	$f26, $r3, 104
    53  	fld.d	$f27, $r3, 112
    54  	fld.d	$f28, $r3, 120
    55  	fld.d	$f29, $r3, 128
    56  	fld.d	$f30, $r3, 136
    57  	fld.d	$f31, $r3, 144
    58  	ld.d	$r1, $r3, 0
    59  	addi.d	$r3, $r3, 160
    60  	jirl	$r0, $r1, 0
    61  
    62  
    63  #ifdef __ELF__
    64  .section .note.GNU-stack,"",%progbits
    65  #endif