49 lines
1.1 KiB
ArmAsm
49 lines
1.1 KiB
ArmAsm
|
// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
|
||
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
|
||
|
|
// Differential kernel for the arm64 Q-width FP move: the FMOVQ load and
|
||
|
|
// store in the plain, post-index and pre-index forms, against scaled and
|
||
|
|
// unscaled offsets, and against static symbols. Every function is
|
||
|
|
// byte-compared against go tool asm.
|
||
|
|
|
||
|
|
#include "textflag.h"
|
||
|
|
|
||
|
|
// func writeback()
|
||
|
|
TEXT ·writeback(SB), NOSPLIT, $0-0
|
||
|
|
FMOVQ.P F13, 11(R10)
|
||
|
|
FMOVQ.W F15, 11(R20)
|
||
|
|
FMOVS.P F20, 4(R0)
|
||
|
|
FMOVS.W F20, 4(R0)
|
||
|
|
FMOVD.P F20, 8(R1)
|
||
|
|
FMOVD.W F20, 8(R1)
|
||
|
|
FMOVQ.P 11(R10), F13
|
||
|
|
FMOVQ.W 11(R20), F15
|
||
|
|
FMOVS.P 8(R0), F20
|
||
|
|
FMOVS.W 8(R0), F20
|
||
|
|
FMOVD.W 8(R1), F20
|
||
|
|
RET
|
||
|
|
|
||
|
|
// func plain()
|
||
|
|
TEXT ·plain(SB), NOSPLIT, $0-0
|
||
|
|
FMOVQ F0, 32(R5)
|
||
|
|
FMOVQ F10, 65520(R10)
|
||
|
|
FMOVQ F11, 64(RSP)
|
||
|
|
FMOVQ F11, 8(R20)
|
||
|
|
FMOVQ F11, 4(R20)
|
||
|
|
FMOVQ 32(R5), F2
|
||
|
|
FMOVQ 65520(R10), F10
|
||
|
|
FMOVQ 64(RSP), F11
|
||
|
|
FMOVD F1, 8(R2)
|
||
|
|
FMOVD 8(R2), F1
|
||
|
|
RET
|
||
|
|
|
||
|
|
// func symbols()
|
||
|
|
TEXT ·symbols(SB), NOSPLIT, $0-0
|
||
|
|
FMOVQ F5, x(SB)
|
||
|
|
FMOVQ F5, x+8(SB)
|
||
|
|
FMOVQ x+8(SB), F5
|
||
|
|
FMOVQ x(SB), F5
|
||
|
|
RET
|
||
|
|
|
||
|
|
// data the symbol forms refer to
|
||
|
|
GLOBL x(SB), NOPTR, $16
|