// Copyright 2021 The Go Authors. All rights reserved.

[0] Fix | Delete

// Use of this source code is governed by a BSD-style

[1] Fix | Delete

// license that can be found in the LICENSE file.

[2] Fix | Delete

[3] Fix | Delete

// Macros for transitioning from the host ABI to Go ABI0.

[4] Fix | Delete

//

[5] Fix | Delete

// These save the frame pointer, so in general, functions that use

[6] Fix | Delete

// these should have zero frame size to suppress the automatic frame

[7] Fix | Delete

// pointer, though it's harmless to not do this.

[8] Fix | Delete

[9] Fix | Delete

#ifdef GOOS_windows

[10] Fix | Delete

[11] Fix | Delete

// REGS_HOST_TO_ABI0_STACK is the stack bytes used by

[12] Fix | Delete

// PUSH_REGS_HOST_TO_ABI0.

[13] Fix | Delete

#define REGS_HOST_TO_ABI0_STACK (28*8 + 8)

[14] Fix | Delete

[15] Fix | Delete

// PUSH_REGS_HOST_TO_ABI0 prepares for transitioning from

[16] Fix | Delete

// the host ABI to Go ABI0 code. It saves all registers that are

[17] Fix | Delete

// callee-save in the host ABI and caller-save in Go ABI0 and prepares

[18] Fix | Delete

// for entry to Go.

[19] Fix | Delete

//

[20] Fix | Delete

// Save DI SI BP BX R12 R13 R14 R15 X6-X15 registers and the DF flag.

[21] Fix | Delete

// Clear the DF flag for the Go ABI.

[22] Fix | Delete

// MXCSR matches the Go ABI, so we don't have to set that,

[23] Fix | Delete

// and Go doesn't modify it, so we don't have to save it.

[24] Fix | Delete

#define PUSH_REGS_HOST_TO_ABI0() \

[25] Fix | Delete

PUSHFQ \

[26] Fix | Delete

CLD \

[27] Fix | Delete

ADJSP $(REGS_HOST_TO_ABI0_STACK - 8) \

[28] Fix | Delete

MOVQ DI, (0*0)(SP) \

[29] Fix | Delete

MOVQ SI, (1*8)(SP) \

[30] Fix | Delete

MOVQ BP, (2*8)(SP) \

[31] Fix | Delete

MOVQ BX, (3*8)(SP) \

[32] Fix | Delete

MOVQ R12, (4*8)(SP) \

[33] Fix | Delete

MOVQ R13, (5*8)(SP) \

[34] Fix | Delete

MOVQ R14, (6*8)(SP) \

[35] Fix | Delete

MOVQ R15, (7*8)(SP) \

[36] Fix | Delete

MOVUPS X6, (8*8)(SP) \

[37] Fix | Delete

MOVUPS X7, (10*8)(SP) \

[38] Fix | Delete

MOVUPS X8, (12*8)(SP) \

[39] Fix | Delete

MOVUPS X9, (14*8)(SP) \

[40] Fix | Delete

MOVUPS X10, (16*8)(SP) \

[41] Fix | Delete

MOVUPS X11, (18*8)(SP) \

[42] Fix | Delete

MOVUPS X12, (20*8)(SP) \

[43] Fix | Delete

MOVUPS X13, (22*8)(SP) \

[44] Fix | Delete

MOVUPS X14, (24*8)(SP) \

[45] Fix | Delete

MOVUPS X15, (26*8)(SP)

[46] Fix | Delete

[47] Fix | Delete

#define POP_REGS_HOST_TO_ABI0() \

[48] Fix | Delete

MOVQ (0*0)(SP), DI \

[49] Fix | Delete

MOVQ (1*8)(SP), SI \

[50] Fix | Delete

MOVQ (2*8)(SP), BP \

[51] Fix | Delete

MOVQ (3*8)(SP), BX \

[52] Fix | Delete

MOVQ (4*8)(SP), R12 \

[53] Fix | Delete

MOVQ (5*8)(SP), R13 \

[54] Fix | Delete

MOVQ (6*8)(SP), R14 \

[55] Fix | Delete

MOVQ (7*8)(SP), R15 \

[56] Fix | Delete

MOVUPS (8*8)(SP), X6 \

[57] Fix | Delete

MOVUPS (10*8)(SP), X7 \

[58] Fix | Delete

MOVUPS (12*8)(SP), X8 \

[59] Fix | Delete

MOVUPS (14*8)(SP), X9 \

[60] Fix | Delete

MOVUPS (16*8)(SP), X10 \

[61] Fix | Delete

MOVUPS (18*8)(SP), X11 \

[62] Fix | Delete

MOVUPS (20*8)(SP), X12 \

[63] Fix | Delete

MOVUPS (22*8)(SP), X13 \

[64] Fix | Delete

MOVUPS (24*8)(SP), X14 \

[65] Fix | Delete

MOVUPS (26*8)(SP), X15 \

[66] Fix | Delete

ADJSP $-(REGS_HOST_TO_ABI0_STACK - 8) \

[67] Fix | Delete

POPFQ

[68] Fix | Delete

[69] Fix | Delete

#else

[70] Fix | Delete

// SysV ABI

[71] Fix | Delete

[72] Fix | Delete

#define REGS_HOST_TO_ABI0_STACK (6*8)

[73] Fix | Delete

[74] Fix | Delete

// SysV MXCSR matches the Go ABI, so we don't have to set that,

[75] Fix | Delete

// and Go doesn't modify it, so we don't have to save it.

[76] Fix | Delete

// Both SysV and Go require DF to be cleared, so that's already clear.

[77] Fix | Delete

// The SysV and Go frame pointer conventions are compatible.

[78] Fix | Delete

#define PUSH_REGS_HOST_TO_ABI0() \

[79] Fix | Delete

ADJSP $(REGS_HOST_TO_ABI0_STACK) \

[80] Fix | Delete

MOVQ BP, (5*8)(SP) \

[81] Fix | Delete

LEAQ (5*8)(SP), BP \

[82] Fix | Delete

MOVQ BX, (0*8)(SP) \

[83] Fix | Delete

MOVQ R12, (1*8)(SP) \

[84] Fix | Delete

MOVQ R13, (2*8)(SP) \

[85] Fix | Delete

MOVQ R14, (3*8)(SP) \

[86] Fix | Delete

MOVQ R15, (4*8)(SP)

[87] Fix | Delete

[88] Fix | Delete

#define POP_REGS_HOST_TO_ABI0() \

[89] Fix | Delete

MOVQ (0*8)(SP), BX \

[90] Fix | Delete

MOVQ (1*8)(SP), R12 \

[91] Fix | Delete

MOVQ (2*8)(SP), R13 \

[92] Fix | Delete

MOVQ (3*8)(SP), R14 \

[93] Fix | Delete

MOVQ (4*8)(SP), R15 \

[94] Fix | Delete

MOVQ (5*8)(SP), BP \

[95] Fix | Delete

ADJSP $-(REGS_HOST_TO_ABI0_STACK)

[96] Fix | Delete

[97] Fix | Delete

#endif

[98] Fix | Delete

[99] Fix | Delete