1 // Copyright 2021 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 // Macros for transitioning from the host ABI to Go ABI0. 6 // 7 // These macros save and restore the callee-saved registers 8 // from the stack, but they don't adjust stack pointer, so 9 // the user should prepare stack space in advance. 10 // SAVE_R19_TO_R28(offset) saves R19 ~ R28 to the stack space 11 // of ((offset)+0*8)(RSP) ~ ((offset)+9*8)(RSP). 12 // 13 // SAVE_F8_TO_F15(offset) saves F8 ~ F15 to the stack space 14 // of ((offset)+0*8)(RSP) ~ ((offset)+7*8)(RSP). 15 // 16 // R29 is not saved because Go will save and restore it. 17 18 #define SAVE_R19_TO_R28(offset) \ 19 STP (R19, R20), ((offset)+0*8)(RSP) \ 20 STP (R21, R22), ((offset)+2*8)(RSP) \ 21 STP (R23, R24), ((offset)+4*8)(RSP) \ 22 STP (R25, R26), ((offset)+6*8)(RSP) \ 23 STP (R27, g), ((offset)+8*8)(RSP) 24 25 #define RESTORE_R19_TO_R28(offset) \ 26 LDP ((offset)+0*8)(RSP), (R19, R20) \ 27 LDP ((offset)+2*8)(RSP), (R21, R22) \ 28 LDP ((offset)+4*8)(RSP), (R23, R24) \ 29 LDP ((offset)+6*8)(RSP), (R25, R26) \ 30 LDP ((offset)+8*8)(RSP), (R27, g) /* R28 */ 31 32 #define SAVE_F8_TO_F15(offset) \ 33 FSTPD (F8, F9), ((offset)+0*8)(RSP) \ 34 FSTPD (F10, F11), ((offset)+2*8)(RSP) \ 35 FSTPD (F12, F13), ((offset)+4*8)(RSP) \ 36 FSTPD (F14, F15), ((offset)+6*8)(RSP) 37 38 #define RESTORE_F8_TO_F15(offset) \ 39 FLDPD ((offset)+0*8)(RSP), (F8, F9) \ 40 FLDPD ((offset)+2*8)(RSP), (F10, F11) \ 41 FLDPD ((offset)+4*8)(RSP), (F12, F13) \ 42 FLDPD ((offset)+6*8)(RSP), (F14, F15) 43 44