broadcom/compiler: add generated v3d_nir_lower_algebraic

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25362>

src/broadcom/compiler/meson.build

@@ -44,9 +44,20 @@ libbroadcom_compiler_files = files(
   'v3d_packing.c',
 )
 
+v3d_nir_lower_algebraic_c = custom_target(
+  'v3d_nir_lower_algebraic.c',
+  input : 'v3d_nir_lower_algebraic.py',
+  output : 'v3d_nir_lower_algebraic.c',
+  command : [
+    prog_python, '@INPUT@', '-p', dir_compiler_nir,
+  ],
+  capture : true,
+  depend_files : nir_algebraic_depends,
+)
+
 libbroadcom_compiler = static_library(
   'broadcom_compiler',
-  [libbroadcom_compiler_files, v3d_xml_pack],
+  [libbroadcom_compiler_files, v3d_xml_pack, v3d_nir_lower_algebraic_c],
   include_directories : [inc_include, inc_src, inc_gallium, inc_gallium_aux, inc_broadcom],
   c_args : [no_override_init_args],
   gnu_symbol_visibility : 'hidden',

src/broadcom/compiler/v3d_compiler.h

@@ -1202,6 +1202,7 @@ bool v3d_nir_lower_txf_ms(nir_shader *s);
 bool v3d_nir_lower_image_load_store(nir_shader *s, struct v3d_compile *c);
 bool v3d_nir_lower_global_2x32(nir_shader *s);
 bool v3d_nir_lower_load_store_bitsize(nir_shader *s);
+bool v3d_nir_lower_algebraic(struct nir_shader *shader);
 
 void v3d_vir_emit_tex(struct v3d_compile *c, nir_tex_instr *instr);
 void v3d_vir_emit_image_load_store(struct v3d_compile *c,

src/broadcom/compiler/v3d_nir_lower_algebraic.py

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: MIT
+
+import argparse
+import sys
+
+a = 'a'
+
+lower_alu = [
+    (('f2i8', a), ('i2i8', ('f2i32', a))),
+    (('f2i16', a), ('i2i16', ('f2i32', a))),
+
+    (('f2u8', a), ('u2u8', ('f2u32', a))),
+    (('f2u16', a), ('u2u16', ('f2u32', a))),
+
+    (('i2f32', 'a@8'), ('i2f32', ('i2i32', a))),
+    (('i2f32', 'a@16'), ('i2f32', ('i2i32', a))),
+
+    (('u2f32', 'a@8'), ('u2f32', ('u2u32', a))),
+    (('u2f32', 'a@16'), ('u2f32', ('u2u32', a))),
+]
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-p', '--import-path', required=True)
+    args = parser.parse_args()
+    sys.path.insert(0, args.import_path)
+    run()
+
+def run():
+    import nir_algebraic  # pylint: disable=import-error
+
+    print('#include "v3d_compiler.h"')
+
+    print(nir_algebraic.AlgebraicPass("v3d_nir_lower_algebraic",
+                                      lower_alu).render())
+
+if __name__ == '__main__':
+    main()