[libc] Refactor stdfix extension from llvm_libc_ext.td to llvm_libc_stdfix_ext.td.

[lntue]

This fixes runtime build for armv6 baremetal targets: #83959 (comment)

[llvmbot]

@llvm/pr-subscribers-libc

Author: None (lntue)

Changes

This fixes runtime build for armv6 baremetal targets: #83959 (comment)

---

Full diff: https://github.com/llvm/llvm-project/pull/84365.diff

4 Files Affected:

• (modified) libc/config/baremetal/api.td (+1-1)
• (modified) libc/config/linux/api.td (+1)
• (modified) libc/spec/llvm_libc_ext.td (-20)
• (added) libc/spec/llvm_libc_stdfix_ext.td (+24)

diff --git a/libc/config/baremetal/api.td b/libc/config/baremetal/api.td
index 008eb45386f242..33b3a03828e9c7 100644
--- a/libc/config/baremetal/api.td
+++ b/libc/config/baremetal/api.td
@@ -2,7 +2,7 @@ include "config/public_api.td"
 
 include "spec/stdc.td"
 include "spec/stdc_ext.td"
-include "spec/llvm_libc_ext.td"
+include "spec/llvm_libc_stdfix_ext.td"
 
 def AssertMacro : MacroDef<"assert"> {
   let Defn = [{
diff --git a/libc/config/linux/api.td b/libc/config/linux/api.td
index 526fd03f94f6a5..75432a2a298652 100644
--- a/libc/config/linux/api.td
+++ b/libc/config/linux/api.td
@@ -7,6 +7,7 @@ include "spec/gnu_ext.td"
 include "spec/bsd_ext.td"
 include "spec/stdc_ext.td"
 include "spec/llvm_libc_ext.td"
+include "spec/llvm_libc_stdfix_ext.td"
 
 def AssertMacro : MacroDef<"assert"> {
   let Defn = [{
diff --git a/libc/spec/llvm_libc_ext.td b/libc/spec/llvm_libc_ext.td
index 3241ec0550376b..ca61d4ef371a2e 100644
--- a/libc/spec/llvm_libc_ext.td
+++ b/libc/spec/llvm_libc_ext.td
@@ -51,29 +51,9 @@ def LLVMLibcExt : StandardSpec<"llvm_libc_ext"> {
       ]
   >;
 
-  HeaderSpec StdFix = HeaderSpec<
-      "stdfix.h",
-      [],  // macros
-      [],  // types
-      [],  // enums
-      [    // functions
-          GuardedFunctionSpec<"sqrtuhr", RetValSpec<UnsignedShortFractType>, [ArgSpec<UnsignedShortFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-          GuardedFunctionSpec<"sqrtur", RetValSpec<UnsignedFractType>, [ArgSpec<UnsignedFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-          GuardedFunctionSpec<"sqrtulr", RetValSpec<UnsignedLongFractType>, [ArgSpec<UnsignedLongFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-
-          GuardedFunctionSpec<"sqrtuhk", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UnsignedShortAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-          GuardedFunctionSpec<"sqrtuk", RetValSpec<UnsignedAccumType>, [ArgSpec<UnsignedAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-          GuardedFunctionSpec<"sqrtulk", RetValSpec<UnsignedLongAccumType>, [ArgSpec<UnsignedLongAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-
-          GuardedFunctionSpec<"uhksqrtus", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UnsignedShortType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-          GuardedFunctionSpec<"uksqrtui", RetValSpec<UnsignedAccumType>, [ArgSpec<UnsignedIntType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
-      ]
-  >;
-
   let Headers = [
     Assert,
     Sched,
-    StdFix,
     Strings,
   ];
 }
diff --git a/libc/spec/llvm_libc_stdfix_ext.td b/libc/spec/llvm_libc_stdfix_ext.td
new file mode 100644
index 00000000000000..75bde47810a6be
--- /dev/null
+++ b/libc/spec/llvm_libc_stdfix_ext.td
@@ -0,0 +1,24 @@
+def LLVMLibcStdfixExt : StandardSpec<"llvm_libc_stdfix_ext"> {
+  HeaderSpec StdFix = HeaderSpec<
+      "stdfix.h",
+      [],  // macros
+      [],  // types
+      [],  // enums
+      [    // functions
+          GuardedFunctionSpec<"sqrtuhr", RetValSpec<UnsignedShortFractType>, [ArgSpec<UnsignedShortFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+          GuardedFunctionSpec<"sqrtur", RetValSpec<UnsignedFractType>, [ArgSpec<UnsignedFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+          GuardedFunctionSpec<"sqrtulr", RetValSpec<UnsignedLongFractType>, [ArgSpec<UnsignedLongFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+
+          GuardedFunctionSpec<"sqrtuhk", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UnsignedShortAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+          GuardedFunctionSpec<"sqrtuk", RetValSpec<UnsignedAccumType>, [ArgSpec<UnsignedAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+          GuardedFunctionSpec<"sqrtulk", RetValSpec<UnsignedLongAccumType>, [ArgSpec<UnsignedLongAccumType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+
+          GuardedFunctionSpec<"uhksqrtus", RetValSpec<UnsignedShortAccumType>, [ArgSpec<UnsignedShortType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+          GuardedFunctionSpec<"uksqrtui", RetValSpec<UnsignedAccumType>, [ArgSpec<UnsignedIntType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
+      ]
+  >;
+
+  let Headers = [
+    StdFix,
+  ];
+}

[zeroomega]

I verified the change and it fixes the runtime build for armv6m barebone.