Hi Eric,
after your question:
[snip]
I expect, with enums having varying size, that this cast will
not always work.
[snip]
I started a script for testing with variable enum sizes and compilers...
If does makes sense to you, I'll try to loop from 1 to n (suggestions?) and
build with gcc and clang (and others?) to find the case you're taking about.
I'm also thinking about a negative test...
What do you think?
Cheers,
Francesco
2016-08-01 14:10 GMT+02:00 Eric Engestrom <[email protected]>:
> On Sat, Jul 30, 2016 at 09:49:57AM +0200, Francesco Ansanelli wrote:
> > Signed-off-by: Francesco Ansanelli <[email protected]>
> > ---
> > src/gallium/drivers/freedreno/a2xx/fd2_screen.c | 8 ++++----
> > 1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/src/gallium/drivers/freedreno/a2xx/fd2_screen.c
> b/src/gallium/drivers/freedreno/a2xx/fd2_screen.c
> > index fe4849b..007b9e6 100644
> > --- a/src/gallium/drivers/freedreno/a2xx/fd2_screen.c
> > +++ b/src/gallium/drivers/freedreno/a2xx/fd2_screen.c
> > @@ -61,7 +61,7 @@ fd2_screen_is_format_supported(struct pipe_screen
> *pscreen,
> >
> > if ((usage & (PIPE_BIND_SAMPLER_VIEW |
> > PIPE_BIND_VERTEX_BUFFER)) &&
> > - (fd2_pipe2surface(format) != ~0u)) {
> > + (fd2_pipe2surface(format) != (enum
> a2xx_sq_surfaceformat)~0)) {
>
> You said the compiler warning goes away, but is the condition guaranteed
> to hit? I expect, with enums having varying size, that this cast will
> not always work. I agree with Rob Herring, adding the error value to the
> enum is better.
>
> > retval |= usage & (PIPE_BIND_SAMPLER_VIEW |
> > PIPE_BIND_VERTEX_BUFFER);
> > }
> > @@ -70,7 +70,7 @@ fd2_screen_is_format_supported(struct pipe_screen
> *pscreen,
> > PIPE_BIND_DISPLAY_TARGET |
> > PIPE_BIND_SCANOUT |
> > PIPE_BIND_SHARED)) &&
> > - (fd2_pipe2color(format) != ~0u)) {
> > + (fd2_pipe2color(format) != (enum
> a2xx_colorformatx)~0)) {
> > retval |= usage & (PIPE_BIND_RENDER_TARGET |
> > PIPE_BIND_DISPLAY_TARGET |
> > PIPE_BIND_SCANOUT |
> > @@ -78,12 +78,12 @@ fd2_screen_is_format_supported(struct pipe_screen
> *pscreen,
> > }
> >
> > if ((usage & PIPE_BIND_DEPTH_STENCIL) &&
> > - (fd_pipe2depth(format) != ~0u)) {
> > + (fd_pipe2depth(format) != (enum
> adreno_rb_depth_format)~0)) {
> > retval |= PIPE_BIND_DEPTH_STENCIL;
> > }
> >
> > if ((usage & PIPE_BIND_INDEX_BUFFER) &&
> > - (fd_pipe2index(format) != ~0u)) {
> > + (fd_pipe2index(format) != (enum
> pc_di_index_size)~0)) {
> > retval |= PIPE_BIND_INDEX_BUFFER;
> > }
> >
> > --
> > 1.7.9.5
> >
> > _______________________________________________
> > mesa-dev mailing list
> > [email protected]
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
from subprocess import call
def main():
lastEnum = 1
compiler = 'clang'
out_file = open("gen.c","w")
out_file.write('#include <stdio.h>\n\n')
out_file.write('enum E\n')
out_file.write('{\n')
for enum in range(0, lastEnum):
out_file.write(' e{enum}'.format(enum=enum))
if enum + 1 != lastEnum:
out_file.write(',')
out_file.write('\n')
out_file.write('};\n\n')
out_file.write('enum E\n')
out_file.write('test()\n')
out_file.write('{\n')
out_file.write(' return ~0;\n')
out_file.write('}\n\n')
out_file.write('int\n')
out_file.write('main()\n')
out_file.write('{\n')
out_file.write(' if (test() == (enum E)~0)\n')
out_file.write(' printf("Success\\n");\n')
out_file.write(' else\n')
out_file.write(' printf("Error\\n");\n\n')
out_file.write(' return 0;\n')
out_file.write('}\n')
out_file.close()
call(["cat", "gen.c"]);
call([compiler, "-Wall", "-Wextra", "gen.c", "-o", "genc"]);
call(["./genc"]);
if __name__ == '__main__':
main()
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