Misc: Fix arm32 build

CMakeLists.txt

@@ -150,7 +150,13 @@ elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86" OR "${CMAKE_SYSTEM_PROCESSOR}"
        "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "i686")
   set(CPU_ARCH "x86")
 elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm64")
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8) # Might have an A64 kernel, e.g. Raspbian.
     set(CPU_ARCH "aarch64")
+  else()
+    set(CPU_ARCH "aarch32")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -marm -march=armv7-a")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -marm -march=armv7-a")
+  endif()
 elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7-a" OR
        "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7l")
   set(CPU_ARCH "aarch32")

src/common/fastjmp.cpp

@@ -87,6 +87,30 @@ asm(
 	br x30
 )");
 
+#elif defined(__arm__)
+
+asm(
+	"\t.global " PREFIX "fastjmp_set\n"
+	"\t.global " PREFIX "fastjmp_jmp\n"
+	"\t.text\n"
+	"\t" PREFIX "fastjmp_set:" R"(
+        vstmia r0!, {d8-d15}
+        stmia r0!, {r4-r14}
+        fmrx r1, fpscr
+        str r1, [r0]
+        mov r0, #0
+        bx lr
+)"
+
+"\t" PREFIX "fastjmp_jmp:" R"(
+        vldmia r0!, {d8-d15}
+        ldmia r0!, {r4-r14}
+	ldr r0, [r0]
+	fmxr fpscr, r0
+        mov r0, r1
+	bx lr
+)");
+
 #elif defined(__riscv) && __riscv_xlen == 64
 
 asm(

src/common/fastjmp.h

@@ -14,6 +14,8 @@ struct fastjmp_buf
   static constexpr std::size_t BUF_SIZE = 240;
 #elif defined(_M_ARM64) || defined(__aarch64__)
   static constexpr std::size_t BUF_SIZE = 168;
+#elif defined(_M_ARM) || defined(__arm__)
+  static constexpr std::size_t BUF_SIZE = 112;
 #elif defined(__x86_64__)
   static constexpr std::size_t BUF_SIZE = 64;
 #elif defined(_M_IX86) || defined(__i386__)

src/core/bus.h

@@ -102,8 +102,10 @@ enum : u32
   FASTMEM_LUT_NUM_SLOTS = FASTMEM_LUT_NUM_PAGES * 2,
 };
 
+#ifdef ENABLE_MMAP_FASTMEM
 // Fastmem region size is 4GB to cover the entire 32-bit address space.
 static constexpr size_t FASTMEM_ARENA_SIZE = UINT64_C(0x100000000);
+#endif
 
 bool AllocateMemory();
 void ReleaseMemory();

src/util/opengl_device.cpp

@@ -82,6 +82,8 @@ bool OpenGLDevice::DownloadTexture(GPUTexture* texture, u32 x, u32 y, u32 width,
   }
   else
   {
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, m_read_fbo);
+
     if (T->GetLayers() > 1)
       glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, T->GetGLId(), level, layer);
     else
@@ -91,6 +93,7 @@ bool OpenGLDevice::DownloadTexture(GPUTexture* texture, u32 x, u32 y, u32 width,
     glReadPixels(x, y, width, height, gl_format, gl_type, out_data);
 
     glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
   }
 
   return true;
@@ -137,18 +140,25 @@ void OpenGLDevice::CopyTextureRegion(GPUTexture* dst, u32 dst_x, u32 dst_y, u32
     else
       glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, D->GetGLTarget(), did, dst_level);
     if (S->IsTextureArray())
-      glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, sid, src_level, src_layer);
+      glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, sid, src_level, src_layer);
     else
-      glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, S->GetGLTarget(), sid, src_level);
+      glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, S->GetGLTarget(), sid, src_level);
 
     glDisable(GL_SCISSOR_TEST);
-    glBlitFramebuffer(src_x, src_y, src_x + width, src_y + width, dst_x, dst_y, dst_x + width, dst_y + height,
+    glBlitFramebuffer(src_x, src_y, src_x + width, src_y + height, dst_x, dst_y, dst_x + width, dst_y + height,
                       GL_COLOR_BUFFER_BIT, GL_NEAREST);
     glEnable(GL_SCISSOR_TEST);
 
+    if (m_current_framebuffer)
+    {
       glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_current_framebuffer ? m_current_framebuffer->GetGLId() : 0);
       glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
     }
+    else
+    {
+      glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    }
+  }
 }
 
 void OpenGLDevice::ResolveTextureRegion(GPUTexture* dst, u32 dst_x, u32 dst_y, u32 dst_layer, u32 dst_level,
@@ -185,9 +195,16 @@ void OpenGLDevice::ResolveTextureRegion(GPUTexture* dst, u32 dst_x, u32 dst_y, u
                     GL_COLOR_BUFFER_BIT, GL_LINEAR);
   glEnable(GL_SCISSOR_TEST);
 
+  if (m_current_framebuffer)
+  {
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, m_current_framebuffer ? m_current_framebuffer->GetGLId() : 0);
     glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
   }
+  else
+  {
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+  }
+}
 
 void OpenGLDevice::ClearRenderTarget(GPUTexture* t, u32 c)
 {
@@ -638,9 +655,6 @@ bool OpenGLDevice::CreateBuffers(bool buggy_pbo)
   m_read_fbo = fbos[0];
   m_write_fbo = fbos[1];
 
-  // Read FBO gets left bound.
-  glBindFramebuffer(GL_READ_FRAMEBUFFER, m_read_fbo);
-
   return true;
 }
 
@@ -665,7 +679,7 @@ bool OpenGLDevice::BeginPresent(bool skip_present)
     return false;
   }
 
-  glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
   const Common::Rectangle<s32> window_rc =
     Common::Rectangle<s32>::FromExtents(0, 0, m_window_info.surface_width, m_window_info.surface_height);

src/util/opengl_texture.cpp

@@ -484,6 +484,9 @@ void OpenGLDevice::CommitClear(OpenGLTexture* tex)
         glDisable(GL_SCISSOR_TEST);
         if (tex->IsDepthStencil())
         {
+          if (glClearDepthf)
+            glClearDepthf(tex->GetClearDepth());
+          else
             glClearDepth(tex->GetClearDepth());
           glClear(GL_DEPTH_BUFFER_BIT);
         }
@@ -556,6 +559,9 @@ void OpenGLDevice::CommitClear(OpenGLFramebuffer* fb)
 
       case GPUTexture::State::Cleared:
       {
+        if (glClearDepthf)
+          glClearDepthf(DS->GetClearDepth());
+        else
           glClearDepth(DS->GetClearDepth());
         clear_flags |= GL_DEPTH_BUFFER_BIT;
         DS->SetState(GPUTexture::State::Dirty);

src/util/vulkan_builders.h

@@ -11,7 +11,7 @@
 #include <cstdarg>
 #include <string_view>
 
-#ifdef _DEBUG
+#if defined(_DEBUG) && !defined(CPU_ARCH_ARM32) && !defined(CPU_ARCH_X86)
 #define ENABLE_VULKAN_DEBUG_OBJECTS 1
 #endif