[PATCH vkd3d 1/5] vkd3d-shader: Treat undefined identifiers as equal to 0.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.y | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index f9047c9f..008d01e7 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -588,6 +588,11 @@ expr
             $$ = preproc_parse_integer($1);
             vkd3d_free($1);
         }
+    | T_IDENTIFIER
+        {
+            $$ = 0;
+            vkd3d_free($1);
+        }
     | T_DEFINED T_IDENTIFIER
         {
             $$ = !!preproc_find_macro(ctx, $2);

[PATCH vkd3d 2/5] vkd3d-shader: Implement unary operators.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.l |  2 +-
 libs/vkd3d-shader/preproc.y | 36 ++++++++++++++++++++++++++++++++----
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
index 95b043ed..011f8dbb 100644
--- a/libs/vkd3d-shader/preproc.l
+++ b/libs/vkd3d-shader/preproc.l
@@ -157,7 +157,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
     }

<INITIAL>{WS}+                      {}
-<INITIAL>[()[]{},]                {return yytext[0];}
+<INITIAL>[-()[]{},+!]             {return yytext[0];}
 <INITIAL>.                          {return T_TEXT;}

%%
diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index 008d01e7..51df5d40 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -333,7 +333,8 @@ static void free_parse_arg_names(struct parse_arg_names *args)
 %token T_CONCAT "##"
 %token T_DEFINED "defined"

-%type <integer> expr
+%type <integer> primary_expr
+%type <integer> unary_expr
 %type <string> body_token
 %type <const_string> body_token_const
 %type <string_buffer> body_text
@@ -426,6 +427,18 @@ body_token_const
         {
             $$ = ",";
         }
+    | '+'
+        {
+            $$ = "+";
+        }
+    | '-'
+        {
+            $$ = "-";
+        }
+    | '!'
+        {
+            $$ = "!";
+        }
     | T_CONCAT
         {
             $$ = "##";
@@ -467,7 +480,7 @@ directive
             }
             vkd3d_free($2);
         }
-    | T_IF expr T_NEWLINE
+    | T_IF unary_expr T_NEWLINE
         {
             if (!preproc_push_if(ctx, !!$2))
                 YYABORT;
@@ -482,7 +495,7 @@ directive
             preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
             vkd3d_free($2);
         }
-    | T_ELIF expr T_NEWLINE
+    | T_ELIF unary_expr T_NEWLINE
         {
             const struct preproc_file *file = preproc_get_top_file(ctx);

@@ -582,7 +595,7 @@ directive
             vkd3d_free($2);
         }

-expr
+primary_expr
     : T_INTEGER
         {
             $$ = preproc_parse_integer($1);
@@ -603,3 +616,18 @@ expr
             $$ = !!preproc_find_macro(ctx, $3);
             vkd3d_free($3);
         }
+
+unary_expr
+    : primary_expr
+    | '+' unary_expr
+        {
+            $$ = $2;
+        }
+    | '-' unary_expr
+        {
+            $$ = -$2;
+        }
+    | '!' unary_expr
+        {
+            $$ = !$2;
+        }

[PATCH vkd3d 2/5] vkd3d-shader: Implement unary operators.

[Matteo Bruni]

On Mon, Jan 18, 2021 at 10:17 PM Zebediah Figura
 wrote:
> Signed-off-by: Zebediah Figura
>
> libs/vkd3d-shader/preproc.l |  2 +-
>  libs/vkd3d-shader/preproc.y | 36 ++++++++++++++++++++++++++++++++----
>  2 files changed, 33 insertions(+), 5 deletions(-)

I'm going to be a PITA and complain about patch subjects, specifically
for this and the following patches. The current subject is okay for
now, but will more likely than not clash with the same patch for the
compiler proper. Perhaps just add a "in the preprocessor" suffix?

[PATCH vkd3d 2/5] vkd3d-shader: Implement unary operators.

[Zebediah Figura (she/her)]

On 1/19/21 4:23 AM, Matteo Bruni wrote:
> On Mon, Jan 18, 2021 at 10:17 PM Zebediah Figura
>  wrote:
> > Signed-off-by: Zebediah Figura
> >
> > libs/vkd3d-shader/preproc.l |  2 +-
> >  libs/vkd3d-shader/preproc.y | 36 ++++++++++++++++++++++++++++++++----
> >  2 files changed, 33 insertions(+), 5 deletions(-)
>
> I'm going to be a PITA and complain about patch subjects, specifically
> for this and the following patches. The current subject is okay for
> now, but will more likely than not clash with the same patch for the
> compiler proper. Perhaps just add a "in the preprocessor" suffix?

Yeah, that's a fair point; I'll resend this series.

[PATCH vkd3d 3/5] vkd3d-shader: Implement multiplication and division.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.l |  2 +-
 libs/vkd3d-shader/preproc.y | 24 ++++++++++++++++++++++--
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
index 011f8dbb..a522b7c8 100644
--- a/libs/vkd3d-shader/preproc.l
+++ b/libs/vkd3d-shader/preproc.l
@@ -157,7 +157,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
     }

<INITIAL>{WS}+                      {}
-<INITIAL>[-()[]{},+!]             {return yytext[0];}
+<INITIAL>[-()[]{},+!*/]           {return yytext[0];}
 <INITIAL>.                          {return T_TEXT;}

%%
diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index 51df5d40..1060e9d7 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -335,6 +335,7 @@ static void free_parse_arg_names(struct parse_arg_names *args)

%type <integer> primary_expr
 %type <integer> unary_expr
+%type <integer> mul_expr
 %type <string> body_token
 %type <const_string> body_token_const
 %type <string_buffer> body_text
@@ -439,6 +440,14 @@ body_token_const
         {
             $$ = "!";
         }
+    | '*'
+        {
+            $$ = "*";
+        }
+    | '/'
+        {
+            $$ = "/";
+        }
     | T_CONCAT
         {
             $$ = "##";
@@ -480,7 +489,7 @@ directive
             }
             vkd3d_free($2);
         }
-    | T_IF unary_expr T_NEWLINE
+    | T_IF mul_expr T_NEWLINE
         {
             if (!preproc_push_if(ctx, !!$2))
                 YYABORT;
@@ -495,7 +504,7 @@ directive
             preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
             vkd3d_free($2);
         }
-    | T_ELIF unary_expr T_NEWLINE
+    | T_ELIF mul_expr T_NEWLINE
         {
             const struct preproc_file *file = preproc_get_top_file(ctx);

@@ -631,3 +640,14 @@ unary_expr
         {
             $$ = !$2;
         }
+
+mul_expr
+    : unary_expr
+    | mul_expr '*' unary_expr
+        {
+            $$ = $1 * $3;
+        }
+    | mul_expr '/' unary_expr
+        {
+            $$ = $1 / $3;
+        }

[PATCH vkd3d 3/5] vkd3d-shader: Implement multiplication and division.

[Matteo Bruni]

On Mon, Jan 18, 2021 at 10:34 PM Zebediah Figura
 wrote:
> Signed-off-by: Zebediah Figura
>
> libs/vkd3d-shader/preproc.l |  2 +-
>  libs/vkd3d-shader/preproc.y | 24 ++++++++++++++++++++++--
>  2 files changed, 23 insertions(+), 3 deletions(-)
>
> diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
> index 011f8dbb..a522b7c8 100644
> --- a/libs/vkd3d-shader/preproc.l
> +++ b/libs/vkd3d-shader/preproc.l
> @@ -157,7 +157,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
>      }
>
> <INITIAL>{WS}+                      {}
> -<INITIAL>[-()[]{},+!]             {return yytext[0];}
> +<INITIAL>[-()[]{},+!*/]           {return yytext[0];}
>  <INITIAL>.                          {return T_TEXT;}
>
> %%
> diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
> index 51df5d40..1060e9d7 100644
> --- a/libs/vkd3d-shader/preproc.y
> +++ b/libs/vkd3d-shader/preproc.y
> @@ -335,6 +335,7 @@ static void free_parse_arg_names(struct parse_arg_names *args)
>
> %type <integer> primary_expr
>  %type <integer> unary_expr
> +%type <integer> mul_expr
>  %type <string> body_token
>  %type <const_string> body_token_const
>  %type <string_buffer> body_text
> @@ -439,6 +440,14 @@ body_token_const
>          {
>              $$ = "!";
>          }
> - | '*'
> -
>    {
> -
>        $$ = "*";
> -
>    }
> - | '/'
> -
>    {
> -
>        $$ = "/";
> -
>    }
> | T_CONCAT
>        {
>            $$ = "##";
>
> @@ -480,7 +489,7 @@ directive
>              }
>              vkd3d_free($2);
>          }
> - | T_IF unary_expr T_NEWLINE
> - | T_IF mul_expr T_NEWLINE
>     {
>         if (!preproc_push_if(ctx, !!$2))
>             YYABORT;
>
> @@ -495,7 +504,7 @@ directive
>              preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
>              vkd3d_free($2);
>          }
> - | T_ELIF unary_expr T_NEWLINE
> - | T_ELIF mul_expr T_NEWLINE
>     {
>         const struct preproc_file *file = preproc_get_top_file(ctx);
>
> @@ -631,3 +640,14 @@ unary_expr
>          {
>              $$ = !$2;
>          }
> -
>
> +mul_expr
> - : unary_expr
> - | mul_expr '*' unary_expr
> -
>    {
> -
>        $$ = $1 * $3;
> -
>    }
> - | mul_expr '/' unary_expr
> -
>    {
> -
>        $$ = $1 / $3;
> -
>    }

I don't know that we care but notice that e.g. "#if 1 / 0" causes a
floating point exception.

[PATCH vkd3d 3/5] vkd3d-shader: Implement multiplication and division.

[Zebediah Figura (she/her)]

On 1/19/21 4:24 AM, Matteo Bruni wrote:
> On Mon, Jan 18, 2021 at 10:34 PM Zebediah Figura
>  wrote:
> > Signed-off-by: Zebediah Figura
> >
> > libs/vkd3d-shader/preproc.l |  2 +-
> >  libs/vkd3d-shader/preproc.y | 24 ++++++++++++++++++++++--
> >  2 files changed, 23 insertions(+), 3 deletions(-)
> >
> > diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
> > index 011f8dbb..a522b7c8 100644
> > --- a/libs/vkd3d-shader/preproc.l
> > +++ b/libs/vkd3d-shader/preproc.l
> > @@ -157,7 +157,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
> >      }
> >
> > <INITIAL>{WS}+                      {}
> > -<INITIAL>[-()[]{},+!]             {return yytext[0];}
> > +<INITIAL>[-()[]{},+!*/]           {return yytext[0];}
> >  <INITIAL>.                          {return T_TEXT;}
> >
> > %%
> > diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
> > index 51df5d40..1060e9d7 100644
> > --- a/libs/vkd3d-shader/preproc.y
> > +++ b/libs/vkd3d-shader/preproc.y
> > @@ -335,6 +335,7 @@ static void free_parse_arg_names(struct parse_arg_names *args)
> >
> > %type <integer> primary_expr
> >  %type <integer> unary_expr
> > +%type <integer> mul_expr
> >  %type <string> body_token
> >  %type <const_string> body_token_const
> >  %type <string_buffer> body_text
> > @@ -439,6 +440,14 @@ body_token_const
> >          {
> >              $$ = "!";
> >          }
> > - | '*'
> > -
> >    {
> > -
> >        $$ = "*";
> > -
> >    }
> > - | '/'
> > -
> >    {
> > -
> >        $$ = "/";
> > -
> >    }
> > | T_CONCAT
> >        {
> >            $$ = "##";
> >
> > @@ -480,7 +489,7 @@ directive
> >              }
> >              vkd3d_free($2);
> >          }
> > - | T_IF unary_expr T_NEWLINE
> > - | T_IF mul_expr T_NEWLINE
> >     {
> >         if (!preproc_push_if(ctx, !!$2))
> >             YYABORT;
> >
> > @@ -495,7 +504,7 @@ directive
> >              preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
> >              vkd3d_free($2);
> >          }
> > - | T_ELIF unary_expr T_NEWLINE
> > - | T_ELIF mul_expr T_NEWLINE
> >     {
> >         const struct preproc_file *file = preproc_get_top_file(ctx);
> >
> > @@ -631,3 +640,14 @@ unary_expr
> >          {
> >              $$ = !$2;
> >          }
> > -
> >
> > +mul_expr
> > - : unary_expr
> > - | mul_expr '*' unary_expr
> > -
> >    {
> > -
> >        $$ = $1 * $3;
> > -
> >    }
> > - | mul_expr '/' unary_expr
> > -
> >    {
> > -
> >        $$ = $1 / $3;
> > -
> >    }
>
> I don't know that we care but notice that e.g. "#if 1 / 0" causes a
> floating point exception.

Yes, that probably shouldn't be allowed to crash the preprocessor,
thanks for catching that.

[PATCH vkd3d 4/5] vkd3d-shader: Implement addition and subtraction.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.y | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index 1060e9d7..ccf4ab63 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -336,6 +336,7 @@ static void free_parse_arg_names(struct parse_arg_names *args)
 %type <integer> primary_expr
 %type <integer> unary_expr
 %type <integer> mul_expr
+%type <integer> add_expr
 %type <string> body_token
 %type <const_string> body_token_const
 %type <string_buffer> body_text
@@ -489,7 +490,7 @@ directive
             }
             vkd3d_free($2);
         }
-    | T_IF mul_expr T_NEWLINE
+    | T_IF add_expr T_NEWLINE
         {
             if (!preproc_push_if(ctx, !!$2))
                 YYABORT;
@@ -504,7 +505,7 @@ directive
             preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
             vkd3d_free($2);
         }
-    | T_ELIF mul_expr T_NEWLINE
+    | T_ELIF add_expr T_NEWLINE
         {
             const struct preproc_file *file = preproc_get_top_file(ctx);

@@ -651,3 +652,14 @@ mul_expr
         {
             $$ = $1 / $3;
         }
+
+add_expr
+    : mul_expr
+    | add_expr '+' mul_expr
+        {
+            $$ = $1 + $3;
+        }
+    | add_expr '-' mul_expr
+        {
+            $$ = $1 - $3;
+        }

[PATCH vkd3d 5/5] vkd3d-shader: Implement inequality operators.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.l |  7 ++++--
 libs/vkd3d-shader/preproc.y | 43 +++++++++++++++++++++++++++++++++++--
 2 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
index a522b7c8..6779a39e 100644
--- a/libs/vkd3d-shader/preproc.l
+++ b/libs/vkd3d-shader/preproc.l
@@ -78,6 +78,9 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
 <INITIAL>{IDENTIFIER}/(            {return T_IDENTIFIER_PAREN;}
 <INITIAL>{IDENTIFIER}               {return T_IDENTIFIER;}

+<INITIAL>"<="                       {return T_LE;}
+<INITIAL>">="                       {return T_GE;}
+
     /* We have no use for floats, but shouldn't parse them as integers. */

<INITIAL>[0-9]*.[0-9]+([eE][+-]?[0-9]+)?[hHfF]?    {return T_TEXT;}
@@ -96,7 +99,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
 <INITIAL>"--"                       {return T_TEXT;}
 <INITIAL>"<<"=?                     {return T_TEXT;}
 <INITIAL>">>"=?                     {return T_TEXT;}
-<INITIAL>[-+*/%&|^=><!]=            {return T_TEXT;}
+<INITIAL>[-+*/%&|^=!]=              {return T_TEXT;}

<INCLUDE>"[^"]*"                  {return T_STRING;}
 <INCLUDE><[^>]*>                  {return T_STRING;}
@@ -157,7 +160,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
     }

<INITIAL>{WS}+                      {}
-<INITIAL>[-()[]{},+!*/]           {return yytext[0];}
+<INITIAL>[-()[]{},+!*/<>]         {return yytext[0];}
 <INITIAL>.                          {return T_TEXT;}

%%
diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index ccf4ab63..92c15539 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -331,12 +331,16 @@ static void free_parse_arg_names(struct parse_arg_names *args)
 %token T_UNDEF "#undef"

%token T_CONCAT "##"
+
+%token T_LE "<="
+%token T_GE ">="
 %token T_DEFINED "defined"

%type <integer> primary_expr
 %type <integer> unary_expr
 %type <integer> mul_expr
 %type <integer> add_expr
+%type <integer> ineq_expr
 %type <string> body_token
 %type <const_string> body_token_const
 %type <string_buffer> body_text
@@ -449,10 +453,26 @@ body_token_const
         {
             $$ = "/";
         }
+    | '<'
+        {
+            $$ = "<";
+        }
+    | '>'
+        {
+            $$ = ">";
+        }
     | T_CONCAT
         {
             $$ = "##";
         }
+    | T_LE
+        {
+            $$ = "<=";
+        }
+    | T_GE
+        {
+            $$ = ">=";
+        }
     | T_DEFINED
         {
             $$ = "defined";
@@ -490,7 +510,7 @@ directive
             }
             vkd3d_free($2);
         }
-    | T_IF add_expr T_NEWLINE
+    | T_IF ineq_expr T_NEWLINE
         {
             if (!preproc_push_if(ctx, !!$2))
                 YYABORT;
@@ -505,7 +525,7 @@ directive
             preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
             vkd3d_free($2);
         }
-    | T_ELIF add_expr T_NEWLINE
+    | T_ELIF ineq_expr T_NEWLINE
         {
             const struct preproc_file *file = preproc_get_top_file(ctx);

@@ -663,3 +683,22 @@ add_expr
         {
             $$ = $1 - $3;
         }
+
+ineq_expr
+    : add_expr
+    | ineq_expr '<' add_expr
+        {
+            $$ = $1 < $3;
+        }
+    | ineq_expr '>' add_expr
+        {
+            $$ = $1 > $3;
+        }
+    | ineq_expr T_LE add_expr
+        {
+            $$ = $1 <= $3;
+        }
+    | ineq_expr T_GE add_expr
+        {
+            $$ = $1 >= $3;
+        }