From 35f427c8cc79d941e3249ed729b7ba63974ae588 Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Tue, 10 Jan 2023 21:02:09 +0100
Subject: [PATCH] xtensa: use 8-byte alignment

This is probably not necessary on Espressif chips, but let's strictly
follow the ABI to be sure.
---
 src/runtime/arch_xtensa.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/runtime/arch_xtensa.go b/src/runtime/arch_xtensa.go
index 2bb58476..03ca8c65 100644
--- a/src/runtime/arch_xtensa.go
+++ b/src/runtime/arch_xtensa.go
@@ -9,9 +9,9 @@ const TargetBits = 32
 
 const deferExtraRegs = 0
 
-// Align on a word boundary.
+// The largest alignment according to the Xtensa ABI is 8 (long long, double).
 func align(ptr uintptr) uintptr {
-	return (ptr + 3) &^ 3
+	return (ptr + 7) &^ 7
 }
 
 func getCurrentStackPointer() uintptr {