From 64ee605076b4f63e3a3a65316323cc61f210f030 Mon Sep 17 00:00:00 2001
From: Toad King <toadking@toadking.com>
Date: Sun, 11 Sep 2016 15:55:39 -0500
Subject: [PATCH] emscripten does not guarantee byte arrays to be aligned on
 word boundaries, specify alignment for them

---
 core/vdp_ctrl.c   | 18 +++++++++---------
 core/vdp_render.c |  2 +-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/core/vdp_ctrl.c b/core/vdp_ctrl.c
index f630765..ce8b1a1 100644
--- a/core/vdp_ctrl.c
+++ b/core/vdp_ctrl.c
@@ -54,15 +54,15 @@
 }
 
 /* VDP context */
-uint8 sat[0x400];     /* Internal copy of sprite attribute table */
-uint8 vram[0x10000];  /* Video RAM (64K x 8-bit) */
-uint8 cram[0x80];     /* On-chip color RAM (64 x 9-bit) */
-uint8 vsram[0x80];    /* On-chip vertical scroll RAM (40 x 11-bit) */
-uint8 reg[0x20];      /* Internal VDP registers (23 x 8-bit) */
-uint8 hint_pending;   /* 0= Line interrupt is pending */
-uint8 vint_pending;   /* 1= Frame interrupt is pending */
-uint16 status;        /* VDP status flags */
-uint32 dma_length;    /* DMA remaining length */
+uint8 sat[0x400] __attribute__((aligned(4)));    /* Internal copy of sprite attribute table */
+uint8 vram[0x10000] __attribute__((aligned(4))); /* Video RAM (64K x 8-bit) */
+uint8 cram[0x80] __attribute__((aligned(4)));    /* On-chip color RAM (64 x 9-bit) */
+uint8 vsram[0x80] __attribute__((aligned(4)));   /* On-chip vertical scroll RAM (40 x 11-bit) */
+uint8 reg[0x20];                                 /* Internal VDP registers (23 x 8-bit) */
+uint8 hint_pending;                              /* 0= Line interrupt is pending */
+uint8 vint_pending;                              /* 1= Frame interrupt is pending */
+uint16 status;                                   /* VDP status flags */
+uint32 dma_length;                               /* DMA remaining length */
 
 /* Global variables */
 uint16 ntab;                      /* Name table A base address */
diff --git a/core/vdp_render.c b/core/vdp_render.c
index 485949a..c9493b3 100644
--- a/core/vdp_render.c
+++ b/core/vdp_render.c
@@ -553,7 +553,7 @@ static const uint32 tms_palette[16] =
 #endif
 
 /* Cached and flipped patterns */
-static uint8 bg_pattern_cache[0x80000];
+static uint8 bg_pattern_cache[0x80000] __attribute__((aligned(4)));
 
 /* Sprite pattern name offset look-up table (Mode 5) */
 static uint8 name_lut[0x400];