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Diffstat (limited to 'src/reflect/asm_loong64.s')
| -rw-r--r-- | src/reflect/asm_loong64.s | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/reflect/asm_loong64.s b/src/reflect/asm_loong64.s new file mode 100644 index 0000000..520f0af --- /dev/null +++ b/src/reflect/asm_loong64.s @@ -0,0 +1,89 @@ +// Copyright 2022 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. + +#include "textflag.h" +#include "funcdata.h" + +#define REGCTXT R29 + +// The frames of each of the two functions below contain two locals, at offsets +// that are known to the runtime. +// +// The first local is a bool called retValid with a whole pointer-word reserved +// for it on the stack. The purpose of this word is so that the runtime knows +// whether the stack-allocated return space contains valid values for stack +// scanning. +// +// The second local is an abi.RegArgs value whose offset is also known to the +// runtime, so that a stack map for it can be constructed, since it contains +// pointers visible to the GC. +#define LOCAL_RETVALID 40 +#define LOCAL_REGARGS 48 + +// The frame size of the functions below is +// 32 (args of callReflect) + 8 (bool + padding) + 392 (abi.RegArgs) = 432. + +// makeFuncStub is the code half of the function returned by MakeFunc. +// See the comment on the declaration of makeFuncStub in makefunc.go +// for more details. +// No arg size here, runtime pulls arg map out of the func value. +TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$432 + NO_LOCAL_POINTERS + ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25 + JAL runtime·spillArgs(SB) + MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS + +#ifdef GOEXPERIMENT_regabiargs + MOVV REGCTXT, R4 + MOVV R25, R5 +#else + MOVV REGCTXT, 8(R3) + MOVV R25, 16(R3) +#endif + JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB) + MOVV 32(R3), REGCTXT // restore REGCTXT + + MOVV REGCTXT, 8(R3) + MOVV $argframe+0(FP), R20 + MOVV R20, 16(R3) + MOVV R0, LOCAL_RETVALID(R3) + ADDV $LOCAL_RETVALID, R3, R20 + MOVV R20, 24(R3) + ADDV $LOCAL_REGARGS, R3, R20 + MOVV R20, 32(R3) + JAL ·callReflect(SB) + ADDV $LOCAL_REGARGS, R3, R25 //unspillArgs using R25 + JAL runtime·unspillArgs(SB) + RET + +// methodValueCall is the code half of the function returned by makeMethodValue. +// See the comment on the declaration of methodValueCall in makefunc.go +// for more details. +// No arg size here; runtime pulls arg map out of the func value. +TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$432 + NO_LOCAL_POINTERS + ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25 + JAL runtime·spillArgs(SB) + MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS +#ifdef GOEXPERIMENT_regabiargs + MOVV REGCTXT, R4 + MOVV R25, R5 +#else + MOVV REGCTXT, 8(R3) + MOVV R25, 16(R3) +#endif + JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB) + MOVV 32(R3), REGCTXT // restore REGCTXT + MOVV REGCTXT, 8(R3) + MOVV $argframe+0(FP), R20 + MOVV R20, 16(R3) + MOVB R0, LOCAL_RETVALID(R3) + ADDV $LOCAL_RETVALID, R3, R20 + MOVV R20, 24(R3) + ADDV $LOCAL_REGARGS, R3, R20 + MOVV R20, 32(R3) // frame size to 32+SP as callreflect args) + JAL ·callMethod(SB) + ADDV $LOCAL_REGARGS, R3, R25 // unspillArgs using R25 + JAL runtime·unspillArgs(SB) + RET |