[libc][math][c++23] Add bf16mul{,f,l,f128} math functions (llvm#152847)

This PR adds the following basic math functions for BFloat16 type along
with the tests:
- bf16mul
- bf16mulf
- bf16mull
- bf16mulf128

---------

Signed-off-by: Krishna Pandey <[email protected]>

Author: krishna2803

libc/config/baremetal/aarch64/entrypoints.txt

@@ -760,6 +760,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -777,6 +780,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()

libc/config/baremetal/arm/entrypoints.txt

@@ -763,6 +763,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -780,6 +783,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()

libc/config/baremetal/riscv/entrypoints.txt

@@ -763,6 +763,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -780,6 +783,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()

libc/config/darwin/aarch64/entrypoints.txt

@@ -593,6 +593,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -610,6 +613,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()

libc/config/darwin/x86_64/entrypoints.txt

@@ -236,6 +236,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl

libc/config/gpu/amdgpu/entrypoints.txt

@@ -619,6 +619,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl

libc/config/gpu/nvptx/entrypoints.txt

@@ -620,6 +620,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl

libc/config/linux/aarch64/entrypoints.txt

@@ -847,6 +847,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -864,6 +867,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()

libc/config/linux/arm/entrypoints.txt

@@ -463,6 +463,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl

libc/config/linux/riscv/entrypoints.txt

@@ -866,6 +866,9 @@ list(APPEND TARGET_LIBM_ENTRYPOINTS
   libc.src.math.bf16add
   libc.src.math.bf16addf
   libc.src.math.bf16addl
+  libc.src.math.bf16mul
+  libc.src.math.bf16mulf
+  libc.src.math.bf16mull
   libc.src.math.bf16sub
   libc.src.math.bf16subf
   libc.src.math.bf16subl
@@ -883,6 +886,7 @@ if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
     # math.h C++23 mixed bfloat16 and _Float128 entrypoints
     libc.src.math.bf16addf128
+    libc.src.math.bf16mulf128
     libc.src.math.bf16subf128
   )
 endif()