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Diffstat (limited to '')
| -rw-r--r-- | src/runtime/cgo/abi_ppc64x.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/runtime/cgo/abi_ppc64x.h b/src/runtime/cgo/abi_ppc64x.h new file mode 100644 index 0000000..245a526 --- /dev/null +++ b/src/runtime/cgo/abi_ppc64x.h @@ -0,0 +1,195 @@ +// Copyright 2023 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 ABI +// +// On PPC64/ELFv2 targets, the following registers are callee +// saved when called from C. They must be preserved before +// calling into Go which does not preserve any of them. +// +// R14-R31 +// CR2-4 +// VR20-31 +// F14-F31 +// +// xcoff(aix) and ELFv1 are similar, but may only require a +// subset of these. +// +// These macros assume a 16 byte aligned stack pointer. This +// is required by ELFv1, ELFv2, and AIX PPC64. + +#define SAVE_GPR_SIZE (18*8) +#define SAVE_GPR(offset) \ + MOVD R14, (offset+8*0)(R1) \ + MOVD R15, (offset+8*1)(R1) \ + MOVD R16, (offset+8*2)(R1) \ + MOVD R17, (offset+8*3)(R1) \ + MOVD R18, (offset+8*4)(R1) \ + MOVD R19, (offset+8*5)(R1) \ + MOVD R20, (offset+8*6)(R1) \ + MOVD R21, (offset+8*7)(R1) \ + MOVD R22, (offset+8*8)(R1) \ + MOVD R23, (offset+8*9)(R1) \ + MOVD R24, (offset+8*10)(R1) \ + MOVD R25, (offset+8*11)(R1) \ + MOVD R26, (offset+8*12)(R1) \ + MOVD R27, (offset+8*13)(R1) \ + MOVD R28, (offset+8*14)(R1) \ + MOVD R29, (offset+8*15)(R1) \ + MOVD g, (offset+8*16)(R1) \ + MOVD R31, (offset+8*17)(R1) + +#define RESTORE_GPR(offset) \ + MOVD (offset+8*0)(R1), R14 \ + MOVD (offset+8*1)(R1), R15 \ + MOVD (offset+8*2)(R1), R16 \ + MOVD (offset+8*3)(R1), R17 \ + MOVD (offset+8*4)(R1), R18 \ + MOVD (offset+8*5)(R1), R19 \ + MOVD (offset+8*6)(R1), R20 \ + MOVD (offset+8*7)(R1), R21 \ + MOVD (offset+8*8)(R1), R22 \ + MOVD (offset+8*9)(R1), R23 \ + MOVD (offset+8*10)(R1), R24 \ + MOVD (offset+8*11)(R1), R25 \ + MOVD (offset+8*12)(R1), R26 \ + MOVD (offset+8*13)(R1), R27 \ + MOVD (offset+8*14)(R1), R28 \ + MOVD (offset+8*15)(R1), R29 \ + MOVD (offset+8*16)(R1), g \ + MOVD (offset+8*17)(R1), R31 + +#define SAVE_FPR_SIZE (18*8) +#define SAVE_FPR(offset) \ + FMOVD F14, (offset+8*0)(R1) \ + FMOVD F15, (offset+8*1)(R1) \ + FMOVD F16, (offset+8*2)(R1) \ + FMOVD F17, (offset+8*3)(R1) \ + FMOVD F18, (offset+8*4)(R1) \ + FMOVD F19, (offset+8*5)(R1) \ + FMOVD F20, (offset+8*6)(R1) \ + FMOVD F21, (offset+8*7)(R1) \ + FMOVD F22, (offset+8*8)(R1) \ + FMOVD F23, (offset+8*9)(R1) \ + FMOVD F24, (offset+8*10)(R1) \ + FMOVD F25, (offset+8*11)(R1) \ + FMOVD F26, (offset+8*12)(R1) \ + FMOVD F27, (offset+8*13)(R1) \ + FMOVD F28, (offset+8*14)(R1) \ + FMOVD F29, (offset+8*15)(R1) \ + FMOVD F30, (offset+8*16)(R1) \ + FMOVD F31, (offset+8*17)(R1) + +#define RESTORE_FPR(offset) \ + FMOVD (offset+8*0)(R1), F14 \ + FMOVD (offset+8*1)(R1), F15 \ + FMOVD (offset+8*2)(R1), F16 \ + FMOVD (offset+8*3)(R1), F17 \ + FMOVD (offset+8*4)(R1), F18 \ + FMOVD (offset+8*5)(R1), F19 \ + FMOVD (offset+8*6)(R1), F20 \ + FMOVD (offset+8*7)(R1), F21 \ + FMOVD (offset+8*8)(R1), F22 \ + FMOVD (offset+8*9)(R1), F23 \ + FMOVD (offset+8*10)(R1), F24 \ + FMOVD (offset+8*11)(R1), F25 \ + FMOVD (offset+8*12)(R1), F26 \ + FMOVD (offset+8*13)(R1), F27 \ + FMOVD (offset+8*14)(R1), F28 \ + FMOVD (offset+8*15)(R1), F29 \ + FMOVD (offset+8*16)(R1), F30 \ + FMOVD (offset+8*17)(R1), F31 + +// Save and restore VR20-31 (aka VSR56-63). These +// macros must point to a 16B aligned offset. +#define SAVE_VR_SIZE (12*16) +#define SAVE_VR(offset, rtmp) \ + MOVD $(offset+16*0), rtmp \ + STVX V20, (rtmp)(R1) \ + MOVD $(offset+16*1), rtmp \ + STVX V21, (rtmp)(R1) \ + MOVD $(offset+16*2), rtmp \ + STVX V22, (rtmp)(R1) \ + MOVD $(offset+16*3), rtmp \ + STVX V23, (rtmp)(R1) \ + MOVD $(offset+16*4), rtmp \ + STVX V24, (rtmp)(R1) \ + MOVD $(offset+16*5), rtmp \ + STVX V25, (rtmp)(R1) \ + MOVD $(offset+16*6), rtmp \ + STVX V26, (rtmp)(R1) \ + MOVD $(offset+16*7), rtmp \ + STVX V27, (rtmp)(R1) \ + MOVD $(offset+16*8), rtmp \ + STVX V28, (rtmp)(R1) \ + MOVD $(offset+16*9), rtmp \ + STVX V29, (rtmp)(R1) \ + MOVD $(offset+16*10), rtmp \ + STVX V30, (rtmp)(R1) \ + MOVD $(offset+16*11), rtmp \ + STVX V31, (rtmp)(R1) + +#define RESTORE_VR(offset, rtmp) \ + MOVD $(offset+16*0), rtmp \ + LVX (rtmp)(R1), V20 \ + MOVD $(offset+16*1), rtmp \ + LVX (rtmp)(R1), V21 \ + MOVD $(offset+16*2), rtmp \ + LVX (rtmp)(R1), V22 \ + MOVD $(offset+16*3), rtmp \ + LVX (rtmp)(R1), V23 \ + MOVD $(offset+16*4), rtmp \ + LVX (rtmp)(R1), V24 \ + MOVD $(offset+16*5), rtmp \ + LVX (rtmp)(R1), V25 \ + MOVD $(offset+16*6), rtmp \ + LVX (rtmp)(R1), V26 \ + MOVD $(offset+16*7), rtmp \ + LVX (rtmp)(R1), V27 \ + MOVD $(offset+16*8), rtmp \ + LVX (rtmp)(R1), V28 \ + MOVD $(offset+16*9), rtmp \ + LVX (rtmp)(R1), V29 \ + MOVD $(offset+16*10), rtmp \ + LVX (rtmp)(R1), V30 \ + MOVD $(offset+16*11), rtmp \ + LVX (rtmp)(R1), V31 + +// LR and CR are saved in the caller's frame. The callee must +// make space for all other callee-save registers. +#define SAVE_ALL_REG_SIZE (SAVE_GPR_SIZE+SAVE_FPR_SIZE+SAVE_VR_SIZE) + +// Stack a frame and save all callee-save registers following the +// host OS's ABI. Fortunately, this is identical for AIX, ELFv1, and +// ELFv2. All host ABIs require the stack pointer to maintain 16 byte +// alignment, and save the callee-save registers in the same places. +// +// To restate, R1 is assumed to be aligned when this macro is used. +// This assumes the caller's frame is compliant with the host ABI. +// CR and LR are saved into the caller's frame per the host ABI. +// R0 is initialized to $0 as expected by Go. +#define STACK_AND_SAVE_HOST_TO_GO_ABI(extra) \ + MOVD LR, R0 \ + MOVD R0, 16(R1) \ + MOVW CR, R0 \ + MOVD R0, 8(R1) \ + MOVDU R1, -(extra)-FIXED_FRAME-SAVE_ALL_REG_SIZE(R1) \ + SAVE_GPR(extra+FIXED_FRAME) \ + SAVE_FPR(extra+FIXED_FRAME+SAVE_GPR_SIZE) \ + SAVE_VR(extra+FIXED_FRAME+SAVE_GPR_SIZE+SAVE_FPR_SIZE, R0) \ + MOVD $0, R0 + +// This unstacks the frame, restoring all callee-save registers +// as saved by STACK_AND_SAVE_HOST_TO_GO_ABI. +// +// R0 is not guaranteed to contain $0 after this macro. +#define UNSTACK_AND_RESTORE_GO_TO_HOST_ABI(extra) \ + RESTORE_GPR(extra+FIXED_FRAME) \ + RESTORE_FPR(extra+FIXED_FRAME+SAVE_GPR_SIZE) \ + RESTORE_VR(extra+FIXED_FRAME+SAVE_GPR_SIZE+SAVE_FPR_SIZE, R0) \ + ADD $(extra+FIXED_FRAME+SAVE_ALL_REG_SIZE), R1 \ + MOVD 16(R1), R0 \ + MOVD R0, LR \ + MOVD 8(R1), R0 \ + MOVW R0, CR |