Text file src/runtime/cgo/asm_ppc64x.s
1 // Copyright 2014 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 ppc64 ppc64le
6
7 #include "textflag.h"
8 #include "asm_ppc64x.h"
9
10 // Called by C code generated by cmd/cgo.
11 // func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr)
12 // Saves C callee-saved registers and calls fn with three arguments.
13 TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
14 // Start with standard C stack frame layout and linkage
15 MOVD LR, R0
16 MOVD R0, 16(R1) // Save LR in caller's frame
17 MOVW CR, R0 // Save CR in caller's frame
18 MOVD R0, 8(R1)
19 MOVD R2, 24(R1) // Save TOC in caller's frame
20
21 BL saveregs2<>(SB)
22
23 MOVDU R1, (-288-3*8-FIXED_FRAME)(R1)
24
25 // Initialize Go ABI environment
26 BL runtime·reginit(SB)
27 BL runtime·load_g(SB)
28
29 MOVD R3, R12
30 #ifdef GOARCH_ppc64
31 // ppc64 use elf ABI v1. we must get the real entry address from
32 // first slot of the function descriptor before call.
33 // Same for AIX.
34 MOVD 8(R12), R2
35 MOVD (R12), R12
36 #endif
37 MOVD R12, CTR
38 MOVD R4, FIXED_FRAME+0(R1)
39 MOVW R5, FIXED_FRAME+8(R1)
40 MOVD R6, FIXED_FRAME+16(R1)
41 BL (CTR)
42
43 ADD $(288+3*8+FIXED_FRAME), R1
44
45 BL restoreregs2<>(SB)
46
47 MOVD 24(R1), R2
48 MOVD 8(R1), R0
49 MOVFL R0, $0xff
50 MOVD 16(R1), R0
51 MOVD R0, LR
52 RET
53
54 TEXT saveregs2<>(SB),NOSPLIT|NOFRAME,$0
55 // O=-288; for R in R{14..31}; do echo "\tMOVD\t$R, $O(R1)"|sed s/R30/g/; ((O+=8)); done; for F in F{14..31}; do echo "\tFMOVD\t$F, $O(R1)"; ((O+=8)); done
56 MOVD R14, -288(R1)
57 MOVD R15, -280(R1)
58 MOVD R16, -272(R1)
59 MOVD R17, -264(R1)
60 MOVD R18, -256(R1)
61 MOVD R19, -248(R1)
62 MOVD R20, -240(R1)
63 MOVD R21, -232(R1)
64 MOVD R22, -224(R1)
65 MOVD R23, -216(R1)
66 MOVD R24, -208(R1)
67 MOVD R25, -200(R1)
68 MOVD R26, -192(R1)
69 MOVD R27, -184(R1)
70 MOVD R28, -176(R1)
71 MOVD R29, -168(R1)
72 MOVD g, -160(R1)
73 MOVD R31, -152(R1)
74 FMOVD F14, -144(R1)
75 FMOVD F15, -136(R1)
76 FMOVD F16, -128(R1)
77 FMOVD F17, -120(R1)
78 FMOVD F18, -112(R1)
79 FMOVD F19, -104(R1)
80 FMOVD F20, -96(R1)
81 FMOVD F21, -88(R1)
82 FMOVD F22, -80(R1)
83 FMOVD F23, -72(R1)
84 FMOVD F24, -64(R1)
85 FMOVD F25, -56(R1)
86 FMOVD F26, -48(R1)
87 FMOVD F27, -40(R1)
88 FMOVD F28, -32(R1)
89 FMOVD F29, -24(R1)
90 FMOVD F30, -16(R1)
91 FMOVD F31, -8(R1)
92
93 RET
94
95 TEXT restoreregs2<>(SB),NOSPLIT|NOFRAME,$0
96 // O=-288; for R in R{14..31}; do echo "\tMOVD\t$O(R1), $R"|sed s/R30/g/; ((O+=8)); done; for F in F{14..31}; do echo "\tFMOVD\t$O(R1), $F"; ((O+=8)); done
97 MOVD -288(R1), R14
98 MOVD -280(R1), R15
99 MOVD -272(R1), R16
100 MOVD -264(R1), R17
101 MOVD -256(R1), R18
102 MOVD -248(R1), R19
103 MOVD -240(R1), R20
104 MOVD -232(R1), R21
105 MOVD -224(R1), R22
106 MOVD -216(R1), R23
107 MOVD -208(R1), R24
108 MOVD -200(R1), R25
109 MOVD -192(R1), R26
110 MOVD -184(R1), R27
111 MOVD -176(R1), R28
112 MOVD -168(R1), R29
113 MOVD -160(R1), g
114 MOVD -152(R1), R31
115 FMOVD -144(R1), F14
116 FMOVD -136(R1), F15
117 FMOVD -128(R1), F16
118 FMOVD -120(R1), F17
119 FMOVD -112(R1), F18
120 FMOVD -104(R1), F19
121 FMOVD -96(R1), F20
122 FMOVD -88(R1), F21
123 FMOVD -80(R1), F22
124 FMOVD -72(R1), F23
125 FMOVD -64(R1), F24
126 FMOVD -56(R1), F25
127 FMOVD -48(R1), F26
128 FMOVD -40(R1), F27
129 FMOVD -32(R1), F28
130 FMOVD -24(R1), F29
131 FMOVD -16(R1), F30
132 FMOVD -8(R1), F31
133
134 RET
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