Added alignment option

README.md

@@ -17,7 +17,6 @@ Changes
   + Forced alignment at the start of a page to prevent crossing cache line boundaries
   + Simplifying instruction decode
 - Minimize compiled code size to reduce pressure on L1i cache
-- Sound is no longer emulated during skip frames
 
 Credits
 =========

meson.build

@@ -5,8 +5,7 @@ project('quickerNES','c','cpp',
 )
 
 # Getting page alignment
-getConfCommand = run_command('getconf', 'PAGESIZE', check: true)
+pageSize = get_option('CPUFunctionAlignment')
-pageSize = getConfCommand.stdout().strip()
 
 # quickerNES Core sources
 
@@ -45,7 +44,7 @@ quickerNESCoreSrc = [
 # quickerNES Core Configuration
 
  quickerNESCoreDependency = declare_dependency(
-  compile_args        : [ '-Wfatal-errors', '-Wall', '-Werror', '-Wno-multichar', '-D_PAGE_SIZE="' + pageSize + '"'],
+  compile_args        : [ '-Wfatal-errors', '-Wall', '-Werror', '-Wno-multichar', '-D_PAGE_SIZE="' + pageSize.to_string() + '"'],
   include_directories : include_directories(['source', 'source/core', 'extern']),
   sources             : [ quickerNESCoreSrc, 'extern/metrohash128/metrohash128.cpp' ]
  )

meson_options.txt

@@ -4,3 +4,13 @@ option('buildTests',
   description : 'Build test suite',
   yield: true
 )
+
+option('CPUFunctionAlignment',
+  type : 'integer',
+  min : 1,
+  value : 4096,
+  description : '''Indicates the alignment for the main emulator CPU function.
+                 This is a large function that may cross page boundaries, which impacts performance. 
+                 We recommend setting this value for the architecture own page size. 
+                 This requires the GNU compiler to work.'''
+)