[libc] Include stdfix.h in baremetal targets (llvm#83900)

Fixed-point arithmetic support is targeted towards baremetal targets.

Author: petrhosek

libc/config/baremetal/api.td

@@ -1,6 +1,7 @@
 include "config/public_api.td"
 
 include "spec/stdc.td"
+include "spec/stdc_ext.td"
 
 def AssertMacro : MacroDef<"assert"> {
   let Defn = [{

libc/config/baremetal/arm/entrypoints.txt

@@ -76,7 +76,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdio.vsprintf
     libc.src.stdio.vsnprintf
 
-
     # stdbit.h entrypoints
     libc.src.stdbit.stdc_leading_zeros_uc
     libc.src.stdbit.stdc_leading_zeros_us
@@ -280,6 +279,36 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.truncl
 )
 
+if(LIBC_COMPILER_HAS_FIXED_POINT)
+  list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # stdfix.h _Fract and _Accum entrypoints
+    libc.src.stdfix.abshk
+    libc.src.stdfix.abshr
+    libc.src.stdfix.absk
+    libc.src.stdfix.absr
+    libc.src.stdfix.abslk
+    libc.src.stdfix.abslr
+    libc.src.stdfix.roundhk
+    libc.src.stdfix.roundhr
+    libc.src.stdfix.roundk
+    libc.src.stdfix.roundr
+    libc.src.stdfix.roundlk
+    libc.src.stdfix.roundlr
+    libc.src.stdfix.rounduhk
+    libc.src.stdfix.rounduhr
+    libc.src.stdfix.rounduk
+    libc.src.stdfix.roundur
+    libc.src.stdfix.roundulk
+    libc.src.stdfix.roundulr
+    libc.src.stdfix.sqrtuhk
+    libc.src.stdfix.sqrtuhr
+    libc.src.stdfix.sqrtuk
+    libc.src.stdfix.sqrtur
+    # libc.src.stdfix.sqrtulk
+    libc.src.stdfix.sqrtulr
+  )
+endif()
+
 set(TARGET_LLVMLIBC_ENTRYPOINTS
   ${TARGET_LIBC_ENTRYPOINTS}
   ${TARGET_LIBM_ENTRYPOINTS}

libc/config/baremetal/arm/headers.txt

@@ -7,6 +7,7 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.stdint
     libc.include.inttypes
     libc.include.math
+    libc.include.stdfix
     libc.include.stdio
     libc.include.stdlib
     libc.include.string

libc/config/baremetal/riscv/entrypoints.txt

@@ -279,6 +279,36 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.truncl
 )
 
+if(LIBC_COMPILER_HAS_FIXED_POINT)
+  list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # stdfix.h _Fract and _Accum entrypoints
+    libc.src.stdfix.abshk
+    libc.src.stdfix.abshr
+    libc.src.stdfix.absk
+    libc.src.stdfix.absr
+    libc.src.stdfix.abslk
+    libc.src.stdfix.abslr
+    libc.src.stdfix.roundhk
+    libc.src.stdfix.roundhr
+    libc.src.stdfix.roundk
+    libc.src.stdfix.roundr
+    libc.src.stdfix.roundlk
+    libc.src.stdfix.roundlr
+    libc.src.stdfix.rounduhk
+    libc.src.stdfix.rounduhr
+    libc.src.stdfix.rounduk
+    libc.src.stdfix.roundur
+    libc.src.stdfix.roundulk
+    libc.src.stdfix.roundulr
+    libc.src.stdfix.sqrtuhk
+    libc.src.stdfix.sqrtuhr
+    libc.src.stdfix.sqrtuk
+    libc.src.stdfix.sqrtur
+    # libc.src.stdfix.sqrtulk
+    libc.src.stdfix.sqrtulr
+  )
+endif()
+
 set(TARGET_LLVMLIBC_ENTRYPOINTS
   ${TARGET_LIBC_ENTRYPOINTS}
   ${TARGET_LIBM_ENTRYPOINTS}

libc/config/baremetal/riscv/headers.txt

@@ -7,6 +7,7 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.stdint
     libc.include.inttypes
     libc.include.math
+    libc.include.stdfix
     libc.include.stdio
     libc.include.stdlib
     libc.include.string