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abi_arm64.h
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// 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)