From eef903d04afc6d03f074e3630b9a04168b77d5c7 Mon Sep 17 00:00:00 2001
From: wrv <wrv@utexas.edu>
Date: Mon, 3 Jun 2024 18:11:12 -0500
Subject: [PATCH 1/3] WASM: Enable 64-bit BITS caching

Bug: webp:643
Change-Id: I4cf89575e0ebcfeaf9d84be8e188863657893a07
---
 src/utils/bit_reader_utils.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/utils/bit_reader_utils.h b/src/utils/bit_reader_utils.h
index 25ff31e5..b41a7881 100644
--- a/src/utils/bit_reader_utils.h
+++ b/src/utils/bit_reader_utils.h
@@ -69,6 +69,8 @@ extern "C" {
 #define BITS 56
 #elif defined(__mips__)                        // MIPS
 #define BITS 24
+#elif defined(__wasm__)                        // WASM
+#define BITS 56
 #else                                          // reasonable default
 #define BITS 24
 #endif

From f0c53cd966878807579b90dbada173c70f180b57 Mon Sep 17 00:00:00 2001
From: wrv <wrv@utexas.edu>
Date: Mon, 3 Jun 2024 18:22:31 -0500
Subject: [PATCH 2/3] WASM: don't use USE_GENERIC_TREE

It is 2-4% faster to use hard-coded tree on WASM

Bug: webp:643
Change-Id: I0a192fc6af210c79814a81084cd1f199714bf46c
---
 src/dec/tree_dec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/dec/tree_dec.c b/src/dec/tree_dec.c
index 24346059..8093e78b 100644
--- a/src/dec/tree_dec.c
+++ b/src/dec/tree_dec.c
@@ -16,7 +16,8 @@
 #include "src/utils/bit_reader_inl_utils.h"
 
 #if !defined(USE_GENERIC_TREE)
-#if !defined(__arm__) && !defined(_M_ARM) && !WEBP_AARCH64
+#if !defined(__arm__) && !defined(_M_ARM) && !WEBP_AARCH64 && \
+    !defined(__wasm__)
 // using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then.
 #define USE_GENERIC_TREE 1   // ALTERNATE_CODE
 #else

From 8a7c8dc662e6b633084321123f8e91db53e1b206 Mon Sep 17 00:00:00 2001
From: wrv <wrv@utexas.edu>
Date: Mon, 3 Jun 2024 18:06:04 -0500
Subject: [PATCH 3/3] WASM: Enable VP8L_USE_FAST_LOAD

It is 2-5% faster to use VP8L fast load on WASM

Bug: webp:643
Change-Id: I25c30a9e6bcfc7cadd640122579eeebcb37e6fc0
---
 src/utils/bit_reader_utils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/utils/bit_reader_utils.c b/src/utils/bit_reader_utils.c
index a26557aa..2707420f 100644
--- a/src/utils/bit_reader_utils.c
+++ b/src/utils/bit_reader_utils.c
@@ -124,7 +124,8 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int bits,
 
 #if defined(__arm__) || defined(_M_ARM) || WEBP_AARCH64 || \
     defined(__i386__) || defined(_M_IX86) || \
-    defined(__x86_64__) || defined(_M_X64)
+    defined(__x86_64__) || defined(_M_X64) || \
+    defined(__wasm__)
 #define VP8L_USE_FAST_LOAD
 #endif