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Diffstat (limited to 'src/runtime/cgo/abi_arm64.h')
| -rw-r--r-- | src/runtime/cgo/abi_arm64.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/runtime/cgo/abi_arm64.h b/src/runtime/cgo/abi_arm64.h new file mode 100644 index 0000000..e2b5e6d --- /dev/null +++ b/src/runtime/cgo/abi_arm64.h @@ -0,0 +1,43 @@ +// Copyright 2021 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. + +// Macros for transitioning from the host ABI to Go ABI0. +// +// These macros save and restore the callee-saved registers +// from the stack, but they don't adjust stack pointer, so +// the user should prepare stack space in advance. +// SAVE_R19_TO_R28(offset) saves R19 ~ R28 to the stack space +// of ((offset)+0*8)(RSP) ~ ((offset)+9*8)(RSP). +// +// SAVE_F8_TO_F15(offset) saves F8 ~ F15 to the stack space +// of ((offset)+0*8)(RSP) ~ ((offset)+7*8)(RSP). +// +// R29 is not saved because Go will save and restore it. + +#define SAVE_R19_TO_R28(offset) \ + STP (R19, R20), ((offset)+0*8)(RSP) \ + STP (R21, R22), ((offset)+2*8)(RSP) \ + STP (R23, R24), ((offset)+4*8)(RSP) \ + STP (R25, R26), ((offset)+6*8)(RSP) \ + STP (R27, g), ((offset)+8*8)(RSP) + +#define RESTORE_R19_TO_R28(offset) \ + LDP ((offset)+0*8)(RSP), (R19, R20) \ + LDP ((offset)+2*8)(RSP), (R21, R22) \ + LDP ((offset)+4*8)(RSP), (R23, R24) \ + LDP ((offset)+6*8)(RSP), (R25, R26) \ + LDP ((offset)+8*8)(RSP), (R27, g) /* R28 */ + +#define SAVE_F8_TO_F15(offset) \ + FSTPD (F8, F9), ((offset)+0*8)(RSP) \ + FSTPD (F10, F11), ((offset)+2*8)(RSP) \ + FSTPD (F12, F13), ((offset)+4*8)(RSP) \ + FSTPD (F14, F15), ((offset)+6*8)(RSP) + +#define RESTORE_F8_TO_F15(offset) \ + FLDPD ((offset)+0*8)(RSP), (F8, F9) \ + FLDPD ((offset)+2*8)(RSP), (F10, F11) \ + FLDPD ((offset)+4*8)(RSP), (F12, F13) \ + FLDPD ((offset)+6*8)(RSP), (F14, F15) + |