40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Macros for transitioning from the host ABI to Go ABI0.
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//
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// These macros save and restore the callee-saved registers
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// from the stack, but they don't adjust stack pointer, so
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// the user should prepare stack space in advance.
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// SAVE_R19_TO_R28(offset) saves R19 ~ R28 to the stack space
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// of ((offset)+0*8)(RSP) ~ ((offset)+9*8)(RSP).
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//
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// SAVE_F8_TO_F15(offset) saves F8 ~ F15 to the stack space
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// of ((offset)+0*8)(RSP) ~ ((offset)+7*8)(RSP).
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//
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// R29 is not saved because Go will save and restore it.
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#define SAVE_R19_TO_R28(offset) \
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STP (R19, R20), ((offset)+0*8)(RSP) \
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STP (R21, R22), ((offset)+2*8)(RSP) \
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STP (R23, R24), ((offset)+4*8)(RSP) \
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STP (R25, R26), ((offset)+6*8)(RSP) \
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STP (R27, g), ((offset)+8*8)(RSP)
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#define RESTORE_R19_TO_R28(offset) \
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LDP ((offset)+0*8)(RSP), (R19, R20) \
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LDP ((offset)+2*8)(RSP), (R21, R22) \
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LDP ((offset)+4*8)(RSP), (R23, R24) \
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LDP ((offset)+6*8)(RSP), (R25, R26) \
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LDP ((offset)+8*8)(RSP), (R27, g) /* R28 */
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#define SAVE_F8_TO_F15(offset) \
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FSTPD (F8, F9), ((offset)+0*8)(RSP) \
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FSTPD (F10, F11), ((offset)+2*8)(RSP) \
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FSTPD (F12, F13), ((offset)+4*8)(RSP) \
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FSTPD (F14, F15), ((offset)+6*8)(RSP)
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#define RESTORE_F8_TO_F15(offset) \
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FLDPD ((offset)+0*8)(RSP), (F8, F9) \
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FLDPD ((offset)+2*8)(RSP), (F10, F11) \
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FLDPD ((offset)+4*8)(RSP), (F12, F13) \
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FLDPD ((offset)+6*8)(RSP), (F14, F15)
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