fix(asm): close the oracle parity gaps in frame addressing and calls

testdata/verify/bigframe_arm64.s

@@ -0,0 +1,35 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Large frame offsets and tail calls, byte-parity-checked against go tool asm.
+
+#include "textflag.h"
+
+TEXT ·bigframe(SB), $9000-32
+	MOVD x+0(FP), R5
+	MOVD y+8(FP), R6
+	MOVD R5, z+24(FP)
+	MOVB R5, b+16(FP)
+	MOVD R5, w+30000(FP)
+	RET
+
+TEXT ·unaligned(SB), $9000-16
+	MOVD x+4(FP), R5
+	MOVD R5, ret+8(FP)
+	RET
+
+TEXT ·b32k(SB), $32744-8
+	MOVD x+0(FP), R5
+	MOVD R5, ret+0(FP)
+	RET
+
+TEXT ·oddframe(SB), $8-8
+	MOVD x+0(FP), R5
+	MOVD R5, ret+0(FP)
+	RET
+
+TEXT ·tail(SB), $0-0
+	JMP ·other(SB)
+
+TEXT ·other(SB), NOSPLIT, $0
+	RET