From 37430f22c5234cb09f2325575806b830f947bf8a Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Fri, 7 May 2021 20:41:54 +0200
Subject: Small optimization (~2-4%) and whitespace cleanup!

Cleans up a ton of whitespace in cpu.c (like 100KB!) and improves
readability of some massive decode statements.

Added an optimization for PC-relative loads (pool load) in ROM (since
it's read only and cannot possibily change) that directly emits an
immediate load. This is way faster, specially in MIPS/x86, ARM can be
even faster if we rewrite the immediate load macros to also use a pool.
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 5d28045..f4c758f 100644
--- a/Makefile
+++ b/Makefile
@@ -376,6 +376,7 @@ else ifeq ($(platform), mips32)
 	SHARED := -shared -nostdlib -Wl,--version-script=link.T
 	fpic := -fPIC -DPIC
 	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32r2 -mhard-float
+	CFLAGS += -fno-caller-saves
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
-- 
cgit v1.2.3


From 261b2db9bb65b63d4968f89deecdf92f1975011f Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Wed, 19 May 2021 20:09:44 +0200
Subject: Cleanup Makefiles a bit

---
 Makefile | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index f4c758f..6edf65c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
 DEBUG=0
-HAVE_GRIFFIN=0
 FRONTEND_SUPPORTS_RGB565=1
 FORCE_32BIT_ARCH=0
 HAVE_MMAP=0
@@ -74,7 +73,7 @@ ifeq ($(platform), unix)
 		LIBM :=
 	endif
 	CFLAGS += $(FORCE_32BIT)
-	LDFLAGS := -Wl,--no-undefined
+	LDFLAGS += -Wl,--no-undefined
 	ifeq ($(HAVE_DYNAREC),1)
 		HAVE_MMAP = 1
 	endif
@@ -368,7 +367,7 @@ else ifneq (,$(findstring armv,$(platform)))
 	ifeq (,$(findstring no-dynarec,$(platform)))
 		HAVE_DYNAREC := 1
 	endif
-	LDFLAGS := -Wl,--no-undefined	
+	LDFLAGS += -Wl,--no-undefined
 
 # MIPS
 else ifeq ($(platform), mips32)
@@ -444,11 +443,6 @@ else
 	OPTIMIZE      := -O3 -DNDEBUG
 endif
 
-
-include Makefile.common
-
-OBJECTS := $(SOURCES_C:.c=.o) $(SOURCES_ASM:.S=.o)
-
 DEFINES := -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -Wall
 
 ifeq ($(HAVE_DYNAREC), 1)
@@ -463,6 +457,9 @@ else ifeq ($(CPU_ARCH), x86_32)
 DEFINES += -DX86_ARCH
 endif
 
+include Makefile.common
+
+OBJECTS := $(SOURCES_C:.c=.o) $(SOURCES_ASM:.S=.o)
 
 WARNINGS_DEFINES =
 CODE_DEFINES =
-- 
cgit v1.2.3


From e0a31952dbffd15cd2878ed20142ec41cbd937bb Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Fri, 18 Jun 2021 18:03:47 +0200
Subject: Add preliminary support for non mips32r2 devices

This is required in PS2 but could also make older dingux devices run
gpsp on retroarch
---
 Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 6edf65c..4d75fdd 100644
--- a/Makefile
+++ b/Makefile
@@ -200,7 +200,7 @@ else ifeq ($(platform), psp1)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).a
 	CC = psp-gcc$(EXE_EXT)
 	AR = psp-ar$(EXE_EXT)
-	CFLAGS += -DPSP -G0 -DUSE_BGR_FORMAT
+	CFLAGS += -DPSP -G0 -DUSE_BGR_FORMAT -DMIPS_HAS_R2_INSTS
 	CFLAGS += -I$(shell psp-config --pspsdk-path)/include
 	CFLAGS += -march=allegrex -mfp32 -mgp32 -mlong32 -mabi=eabi
 	CFLAGS += -fomit-frame-pointer -ffast-math
@@ -375,7 +375,7 @@ else ifeq ($(platform), mips32)
 	SHARED := -shared -nostdlib -Wl,--version-script=link.T
 	fpic := -fPIC -DPIC
 	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32r2 -mhard-float
-	CFLAGS += -fno-caller-saves
+	CFLAGS += -fno-caller-saves -DMIPS_HAS_R2_INSTS
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
@@ -393,6 +393,7 @@ else ifeq ($(platform), gcw0)
 	SHARED := -shared -nostdlib -Wl,--version-script=link.T
 	fpic := -fPIC -DPIC
 	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32r2 -mhard-float
+	CFLAGS += -DMIPS_HAS_R2_INSTS
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
@@ -408,7 +409,7 @@ else ifeq ($(platform), gcw0-odbeta)
 	# The ASM code and/or MIPS dynarec of GPSP does not respect
 	# MIPS calling conventions, so we must use '-fno-caller-saves'
 	# for the OpenDingux Beta build
-	CFLAGS += -fno-caller-saves
+	CFLAGS += -fno-caller-saves -DMIPS_HAS_R2_INSTS
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
-- 
cgit v1.2.3


From f8d4276e12165a2610c87e998a343c02c2904855 Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Mon, 21 Jun 2021 19:17:19 +0200
Subject: Add support for mips64n32

This only needs some support to save/load state with 64 bit registers.
Since pointers remain 32 bit, no extra changes are needed in the
dynarec. Verified with qemu (qemu-mipsn32el) and miniretro.
---
 Makefile | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 4d75fdd..d127e92 100644
--- a/Makefile
+++ b/Makefile
@@ -379,6 +379,16 @@ else ifeq ($(platform), mips32)
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
+# MIPS64
+else ifeq ($(platform), mips64n32)
+	TARGET := $(TARGET_NAME)_libretro.so
+	SHARED := -shared -nostdlib -Wl,--version-script=link.T
+	fpic := -fPIC -DPIC
+	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips64 -mabi=n32 -mhard-float
+	CFLAGS += -fno-caller-saves
+	HAVE_DYNAREC := 1
+	CPU_ARCH := mips
+
 # emscripten
 else ifeq ($(platform), emscripten)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).bc
-- 
cgit v1.2.3


From dbf72e95efd507d5a6255c25aee055a0a3c1350e Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Tue, 22 Jun 2021 00:09:44 +0200
Subject: Fix the no-caller-saves bug for MIPS

Seems that ABI mandates that we allocate space for arg0..4 even if we do
pass them as registers. For some reason write_io_register<> functions
write in that stack area (1 word) corrupting the s0 saved register.
This seems to be a new gcc behaviour?
---
 Makefile | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index d127e92..cf0bfd1 100644
--- a/Makefile
+++ b/Makefile
@@ -375,7 +375,7 @@ else ifeq ($(platform), mips32)
 	SHARED := -shared -nostdlib -Wl,--version-script=link.T
 	fpic := -fPIC -DPIC
 	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32r2 -mhard-float
-	CFLAGS += -fno-caller-saves -DMIPS_HAS_R2_INSTS
+	CFLAGS += -DMIPS_HAS_R2_INSTS
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
@@ -385,7 +385,6 @@ else ifeq ($(platform), mips64n32)
 	SHARED := -shared -nostdlib -Wl,--version-script=link.T
 	fpic := -fPIC -DPIC
 	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips64 -mabi=n32 -mhard-float
-	CFLAGS += -fno-caller-saves
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
@@ -394,7 +393,7 @@ else ifeq ($(platform), emscripten)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).bc
 	STATIC_LINKING = 1
 
-# GCW0
+# GCW0 (OD and OD Beta)
 else ifeq ($(platform), gcw0)
 	TARGET := $(TARGET_NAME)_libretro.so
 	CC = /opt/gcw0-toolchain/usr/bin/mipsel-linux-gcc
@@ -407,22 +406,6 @@ else ifeq ($(platform), gcw0)
 	HAVE_DYNAREC := 1
 	CPU_ARCH := mips
 
-# GCW0 (OpenDingux Beta)
-else ifeq ($(platform), gcw0-odbeta)
-	TARGET := $(TARGET_NAME)_libretro.so
-	CC = /opt/gcw0-toolchain/usr/bin/mipsel-linux-gcc
-	CXX = /opt/gcw0-toolchain/usr/bin/mipsel-linux-g++
-	AR = /opt/gcw0-toolchain/usr/bin/mipsel-linux-ar
-	SHARED := -shared -nostdlib -Wl,--version-script=link.T
-	fpic := -fPIC -DPIC
-	CFLAGS += -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32r2 -mhard-float
-	# The ASM code and/or MIPS dynarec of GPSP does not respect
-	# MIPS calling conventions, so we must use '-fno-caller-saves'
-	# for the OpenDingux Beta build
-	CFLAGS += -fno-caller-saves -DMIPS_HAS_R2_INSTS
-	HAVE_DYNAREC := 1
-	CPU_ARCH := mips
-
 # Windows
 else
 	TARGET := $(TARGET_NAME)_libretro.dll
-- 
cgit v1.2.3


From 8dbf5f6c17e3d217877119620e5bbfeba05abd7a Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Sun, 27 Jun 2021 01:16:28 +0200
Subject: Enable big-endian devices: gc/wii

This patch adds big-endian compatibility in gpsp (in general but only
for the interpreter). There's no performance hit for little-endian
platforms (should be a no-op) and only add a small overhead in memory
accesses for big-endian platforms.

Most memory accesses are wrapped with a byteswap instruction and I/O reg
accesses are also rewired for proper access (using macros). Video
rendering has been fixed to also do byteswaps but there's a couple of
games and rendering modes that still seem broken (but they amount to
less than 20 games in my tests with 1K ROMs).

This also adds build rules and CI for NGC/WII/WIIU (untested)
---
 Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index cf0bfd1..5f7afff 100644
--- a/Makefile
+++ b/Makefile
@@ -195,6 +195,14 @@ else ifeq ($(platform), switch)
         include $(LIBTRANSISTOR_HOME)/libtransistor.mk
         STATIC_LINKING=1
 
+# Nintendo Game Cube / Wii / WiiU
+else ifneq (,$(filter $(platform), ngc wii wiiu))
+	TARGET := $(TARGET_NAME)_libretro_$(platform).a
+	CC = $(DEVKITPPC)/bin/powerpc-eabi-gcc$(EXE_EXT)
+	AR = $(DEVKITPPC)/bin/powerpc-eabi-ar$(EXE_EXT)
+	CFLAGS += -DGEKKO -mcpu=750 -meabi -mhard-float -DHAVE_STRTOF_L
+	STATIC_LINKING = 1
+
 # PSP
 else ifeq ($(platform), psp1)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).a
-- 
cgit v1.2.3