github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/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  .file "gcc_loong64.S"
     6  
     7  /*
     8   * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
     9   *
    10   * Calling into the gc tool chain, where all registers are caller save.
    11   * Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31
    12   * are callee-save, so they must be saved explicitly, along with $r1 (LR).
    13   */
    14  .globl crosscall1
    15  crosscall1:
    16  	addi.d	$r3, $r3, -160
    17  	st.d	$r1, $r3, 0
    18  	st.d	$r23, $r3, 8
    19  	st.d	$r24, $r3, 16
    20  	st.d	$r25, $r3, 24
    21  	st.d	$r26, $r3, 32
    22  	st.d	$r27, $r3, 40
    23  	st.d	$r28, $r3, 48
    24  	st.d	$r29, $r3, 56
    25  	st.d	$r30, $r3, 64
    26  	st.d	$r2, $r3, 72
    27  	st.d	$r22, $r3, 80
    28  	fst.d	$f24, $r3, 88
    29  	fst.d	$f25, $r3, 96
    30  	fst.d	$f26, $r3, 104
    31  	fst.d	$f27, $r3, 112
    32  	fst.d	$f28, $r3, 120
    33  	fst.d	$f29, $r3, 128
    34  	fst.d	$f30, $r3, 136
    35  	fst.d	$f31, $r3, 144
    36  
    37  	move	$r18, $r4 // save R4
    38  	move	$r19, $r6
    39  	jirl	$r1, $r5, 0	// call setg_gcc (clobbers R4)
    40  	jirl	$r1, $r18, 0	// call fn
    41  
    42  	ld.d	$r23, $r3, 8
    43  	ld.d	$r24, $r3, 16
    44  	ld.d	$r25, $r3, 24
    45  	ld.d	$r26, $r3, 32
    46  	ld.d	$r27, $r3, 40
    47  	ld.d	$r28, $r3, 48
    48  	ld.d	$r29, $r3, 56
    49  	ld.d	$r30, $r3, 64
    50  	ld.d	$r2, $r3, 72
    51  	ld.d	$r22, $r3, 80
    52  	fld.d	$f24, $r3, 88
    53  	fld.d	$f25, $r3, 96
    54  	fld.d	$f26, $r3, 104
    55  	fld.d	$f27, $r3, 112
    56  	fld.d	$f28, $r3, 120
    57  	fld.d	$f29, $r3, 128
    58  	fld.d	$f30, $r3, 136
    59  	fld.d	$f31, $r3, 144
    60  	ld.d	$r1, $r3, 0
    61  	addi.d	$r3, $r3, 160
    62  	jirl	$r0, $r1, 0
    63  
    64  
    65  #ifdef __ELF__
    66  .section .note.GNU-stack,"",%progbits
    67  #endif