[compiler-rt] Add libgcc compatibility aliases for __cmp{s,d,f}f2.

[compnerd]

Can you define an use a macro similar to ARM_EABI_FNALIAS in int_lib.h please?

[jmgao]

Add and use an FNALIAS macro

[compnerd]

lib/builtins/comparedf2.c

83

Use /* */, since I don't believe we are forcing C99. Similar throughout.

lib/builtins/int_lib.h

23 ↗

(On Diff #32450)

clang-format this line please.

[jmgao]

lib/builtins/comparedf2.c

83

These files only have // comments, and there are a bunch of other ones that are similar.

[compnerd]

lib/builtins/comparedf2.c

83

Okay, seems fair enough

[asl]

lib/builtins/int_lib.h

23 ↗

(On Diff #32575)

What's in darwin case? Shall we define these aliases there as well?

[jmgao]

lib/builtins/int_lib.h

23 ↗

(On Diff #32575)

This will be defined for everything that includes int_lib.h

[jmgao]

lib/builtins/int_lib.h

23 ↗

(On Diff #32575)

Sorry, misread your comment. I'm not sure what should happen in darwin.

[compnerd]

lib/builtins/int_lib.h

23 ↗

(On Diff #32575)

Darwin did at one point use libgcc, so I don't think that this would be problematic. Do you have some reason to believe it would be? We could easily conditionalise the aliases if that is the case.

lib/builtins/comparedf2.c

     }
 }
 
+// Alias for libgcc compatibility
+COMPILER_RT_ABI enum LE_RESULT
+__cmpdf2(fp_t a, fp_t b) __attribute__((alias("__ledf2")));
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,

lib/builtins/comparesf2.c

     }
 }
 
+// Alias for libgcc compatibility
+COMPILER_RT_ABI enum LE_RESULT
+__cmpsf2(fp_t a, fp_t b) __attribute__((alias("__lesf2")));
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,

lib/builtins/comparetf2.c

     }
 }
 
+// Alias for libgcc compatibility
+COMPILER_RT_ABI enum LE_RESULT
+__cmptf2(fp_t a, fp_t b) __attribute__((alias("__letf2")));
+
 enum GE_RESULT {
     GE_LESS      = -1,
     GE_EQUAL     =  0,