feat(arm64): encode pairs, atomics, crypto, system and NEON slices

Assisted-by: GLM 5.3 Flash
2026-09-20 06:44:51 +02:00
parent fc2d92eabd
commit ca3fdce0e0
9 changed files with 2377 additions and 30 deletions
@@ -0,0 +1,72 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Differential kernel for the arm64 synchronisation instructions: the
+// acquire/release loads and stores, the exclusive family and the LSE
+// atomics with acquire and release semantics, plus the register-pair
+// loads and stores.  Every function is byte-compared against go tool asm.
+
+#include "textflag.h"
+
+// func acquireRelease()
+TEXT ·acquireRelease(SB), NOSPLIT, $0-0
+	LDAR  (R1), R2
+	LDARB (R3), R4
+	LDARH (R5), R6
+	LDARW (R7), R8
+	STLR  R2, (R1)
+	STLRB R4, (R3)
+	STLRH R6, (R5)
+	STLRW R8, (R7)
+	RET
+
+// func exclusive()
+TEXT ·exclusive(SB), NOSPLIT, $0-0
+	LDAXR  (R1), R2
+	LDAXRB (R3), R4
+	LDAXRW (R5), R6
+	STLXR  R2, (R1), R8
+	STLXRB R4, (R3), R8
+	STLXRW R6, (R5), R8
+	RET
+
+// func lseAcquireRelease()
+TEXT ·lseAcquireRelease(SB), NOSPLIT, $0-0
+	CASALD   R1, (R3), R2
+	CASALW   R4, (R6), R5
+	LDADDALD R1, (R3), R2
+	LDADDALW R4, (R6), R5
+	LDCLRALB R1, (R3), R2
+	LDCLRALW R4, (R6), R5
+	LDCLRALD R1, (R3), R2
+	LDORALB  R1, (R3), R2
+	LDORALW  R4, (R6), R5
+	LDORALD  R1, (R3), R2
+	SWPALB   R1, (R3), R2
+	SWPALW   R4, (R6), R5
+	SWPALD   R1, (R3), R2
+	RET
+
+// func lseBase()
+TEXT ·lseBase(SB), NOSPLIT, $0-0
+	LDADDD R1, (R3), R2
+	LDADDW R4, (R6), R5
+	CASD   R1, (R3), R2
+	CASW   R4, (R6), R5
+	SWPD   R1, (R3), R2
+	SWPW   R4, (R6), R5
+	RET
+
+// func pairs()
+TEXT ·pairs(SB), NOSPLIT, $0-0
+	LDP   (R1), (R2, R3)
+	LDP   8(R4), (R5, R6)
+	LDP   -16(R1), (R2, R3)
+	LDPW  4(R4), (R5, R6)
+	STP   (R2, R3), 24(R7)
+	STP   (R2, R3),-8(R7)
+	STPW  (R1, R2), 4(R0)
+	FLDPD (R8), (F1, F2)
+	FLDPD 8(R8), (F3, F4)
+	FSTPD (F3, F4),-8(R9)
+	RET