| // 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) | |