[libc] Add a trivial implementation for bcmp

Differential Revision: https://reviews.llvm.org/D108225

3 files changed, 12 insertions, 0 deletions

diff --git a/libc/benchmarks/CMakeLists.txt b/libc/benchmarks/CMakeLists.txt
index ba46faeaca83..3eece745096f 100644
--- a/libc/benchmarks/CMakeLists.txt
+++ b/libc/benchmarks/CMakeLists.txt
@@ -171,6 +171,7 @@ add_libc_multi_impl_benchmark(memcpy)
 add_libc_multi_impl_benchmark(memset)
 add_libc_multi_impl_benchmark(bzero)
 add_libc_multi_impl_benchmark(memcmp)
+add_libc_multi_impl_benchmark(bcmp)
 
 #==============================================================================
 # Google Benchmarking tool
@@ -188,6 +189,7 @@ target_link_libraries(libc.benchmarks.memory_functions.opt_host
   PRIVATE
   libc-memory-benchmark
   libc.src.string.memcmp_opt_host
+  libc.src.string.bcmp_opt_host
   libc.src.string.memcpy_opt_host
   libc.src.string.memset_opt_host
   libc.src.string.bzero_opt_host
diff --git a/libc/benchmarks/LibcMemoryBenchmarkMain.cpp b/libc/benchmarks/LibcMemoryBenchmarkMain.cpp
index 30bbfd44cd9b..8539402a8cda 100644
--- a/libc/benchmarks/LibcMemoryBenchmarkMain.cpp
+++ b/libc/benchmarks/LibcMemoryBenchmarkMain.cpp
@@ -27,6 +27,7 @@ extern void *memcpy(void *__restrict, const void *__restrict, size_t);
 extern void *memset(void *, int, size_t);
 extern void bzero(void *, size_t);
 extern int memcmp(const void *, const void *, size_t);
+extern int bcmp(const void *, const void *, size_t);
 
 } // namespace __llvm_libc
 
@@ -76,6 +77,9 @@ using BenchmarkSetup = SetSetup;
 #elif defined(LIBC_BENCHMARK_FUNCTION_MEMCMP)
 #define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_MEMCMP
 using BenchmarkSetup = ComparisonSetup;
+#elif defined(LIBC_BENCHMARK_FUNCTION_BCMP)
+#define LIBC_BENCHMARK_FUNCTION LIBC_BENCHMARK_FUNCTION_BCMP
+using BenchmarkSetup = ComparisonSetup;
 #else
 #error "Missing LIBC_BENCHMARK_FUNCTION_XXX definition"
 #endif
diff --git a/libc/benchmarks/LibcMemoryGoogleBenchmarkMain.cpp b/libc/benchmarks/LibcMemoryGoogleBenchmarkMain.cpp
index 055f9902fcdc..e48b3a79c06c 100644
--- a/libc/benchmarks/LibcMemoryGoogleBenchmarkMain.cpp
+++ b/libc/benchmarks/LibcMemoryGoogleBenchmarkMain.cpp
@@ -28,6 +28,7 @@ extern void *memcpy(void *__restrict, const void *__restrict, size_t);
 extern void *memset(void *, int, size_t);
 extern void bzero(void *, size_t);
 extern int memcmp(const void *, const void *, size_t);
+extern int bcmp(const void *, const void *, size_t);
 
 } // namespace __llvm_libc
 
@@ -38,6 +39,9 @@ static constexpr MemcpyConfiguration kMemcpyConfigurations[] = {
 static constexpr MemcmpConfiguration kMemcmpConfigurations[] = {
     {__llvm_libc::memcmp, "__llvm_libc::memcmp"}};
 
+static constexpr MemcmpConfiguration kBcmpConfigurations[] = {
+    {__llvm_libc::bcmp, "__llvm_libc::bcmp"}};
+
 static constexpr MemsetConfiguration kMemsetConfigurations[] = {
     {__llvm_libc::memset, "__llvm_libc::memset"}};
 
@@ -116,6 +120,8 @@ BENCHMARK_MEMORY_FUNCTION(BM_Memcpy, CopySetup, MemcpyConfiguration,
                           llvm::makeArrayRef(kMemcpyConfigurations));
 BENCHMARK_MEMORY_FUNCTION(BM_Memcmp, ComparisonSetup, MemcmpConfiguration,
                           llvm::makeArrayRef(kMemcmpConfigurations));
+BENCHMARK_MEMORY_FUNCTION(BM_Bcmp, ComparisonSetup, MemcmpConfiguration,
+                          llvm::makeArrayRef(kBcmpConfigurations));
 BENCHMARK_MEMORY_FUNCTION(BM_Memset, SetSetup, MemsetConfiguration,
                           llvm::makeArrayRef(kMemsetConfigurations));
 BENCHMARK_MEMORY_FUNCTION(BM_Bzero, SetSetup, BzeroConfiguration,