[libclc] Add __clc_nan implementation with signed nancode argument (#146485)

wenju-he · web-flow · commit 93fe52f19e99 · 2025-07-02T08:27:46.000+08:00
In OpenCL Extended Instruction Set Specification, nancode can be signed
integer or vector of signed integers values.
This PR has no change to amdgcn--amdhsa.bc and nvptx64--nvidiacl.bc
because the newly added clc functions are not used in OpenCL library.
diff --git a/libclc/clc/include/clc/math/clc_nan.inc b/libclc/clc/include/clc/math/clc_nan.inc
@@ -7,3 +7,4 @@
 //===----------------------------------------------------------------------===//
 
 _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_U_GENTYPE code);
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_S_GENTYPE code);
diff --git a/libclc/clc/lib/generic/math/clc_nan.inc b/libclc/clc/lib/generic/math/clc_nan.inc
@@ -20,4 +20,8 @@ _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_U_GENTYPE code) {
   return __CLC_AS_GENTYPE(res);
 }
 
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_S_GENTYPE code) {
+  return __clc_nan(__CLC_AS_U_GENTYPE(code));
+}
+
 #undef NAN_MASK

Original file line number	Diff line number	Diff line change
`@@ -7,3 +7,4 @@`
`7`	`7`	`//===----------------------------------------------------------------------===//`
`8`	`8`
`9`	`9`	`_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_U_GENTYPE code);`
	`10`	`+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_S_GENTYPE code);`
Original file line number	Diff line number	Diff line change
`@@ -20,4 +20,8 @@ _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_U_GENTYPE code) {`
`20`	`20`	`return __CLC_AS_GENTYPE(res);`
`21`	`21`	`}`
`22`	`22`
	`23`	`+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_nan(__CLC_S_GENTYPE code) {`
	`24`	`+ return __clc_nan(__CLC_AS_U_GENTYPE(code));`
	`25`	`+}`
	`26`	`+`
`23`	`27`	`#undef NAN_MASK`