meson.build: add rules for building with nasm

Preparation for adding SIMD.

1 files changed, 47 insertions, 1 deletions

diff --git a/meson.build b/meson.build
index de44684..2e034b2 100644
--- a/meson.build
+++ b/meson.build
@@ -8,6 +8,7 @@ lib_src = [
     'log.c',
     'mg2d.c',
 ]
+lib_obj = []
 
 verscript = 'libmg2d.v'
 ver_flag  = '-Wl,--version-script,@0@/@1@'.format(meson.current_source_dir(), verscript)
@@ -16,4 +17,49 @@ dep_tp  = declare_dependency(link_args : '-lthreadpool')
 
 deps = [dep_tp]
 
-library('mg2d', lib_src, link_args : ver_flag, dependencies : deps)
+# x86 SIMD
+arch = host_machine.cpu_family()
+if arch == 'x86_64'
+    nasm = find_program('nasm', required : false)
+    if not nasm.found()
+        warning('nasm not found, no SIMD will be built')
+    endif
+endif
+
+if nasm.found()
+    cdata_asm = configuration_data()
+    cdata_asm.set10('ARCH_X86', true)
+    cdata_asm.set10('ARCH_X86_64', true)
+    cdata_asm.set10('ARCH_X86_32', false)
+    configure_file(output : 'config.asm', output_format : 'nasm', configuration : cdata_asm)
+
+    if host_machine.system() == 'windows'
+        nasm_format = 'win'
+    elif host_machine.system() == 'darwin'
+        nasm_format = 'macho'
+    else
+        nasm_format = 'elf'
+    endif
+    nasm_format += '64'
+
+    nasm_gen = generator(nasm,
+        output: '@BASENAME@.obj',
+        depfile: '@BASENAME@.obj.ndep',
+        arguments: [
+            '-f', nasm_format,
+            '-I', '@SOURCE_DIR@',
+            '-I', '@0@/'.format(meson.current_build_dir()),
+            '-MQ', '@OUTPUT@', '-MF', '@DEPFILE@',
+            '@EXTRA_ARGS@',
+            '@INPUT@',
+            '-o', '@OUTPUT@'
+        ]
+    )
+
+    nasm_sources = files(
+    )
+
+    lib_obj += nasm_gen.process(nasm_sources)
+endif
+
+library('mg2d', lib_src, lib_obj, link_args : ver_flag, dependencies : deps)