clang/test/CodeGen/X86/lzcnt-builtins.c

   1 // RUN: %clang_cc1 -x c -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +lzcnt -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 -x c++ -std=c++11 -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +lzcnt -emit-llvm -o - | FileCheck %s
   3
   4
   5 #include <immintrin.h>
   6
   7 unsigned short test__lzcnt16(unsigned short __X)
   8 {
   9   // CHECK: @llvm.ctlz.i16(i16 %{{.*}}, i1 false)
  10   return __lzcnt16(__X);
  11 }
  12
  13 unsigned int test_lzcnt32(unsigned int __X)
  14 {
  15   // CHECK: @llvm.ctlz.i32(i32 %{{.*}}, i1 false)
  16   return __lzcnt32(__X);
  17 }
  18
  19 unsigned long long test__lzcnt64(unsigned long long __X)
  20 {
  21   // CHECK: @llvm.ctlz.i64(i64 %{{.*}}, i1 false)
  22   return __lzcnt64(__X);
  23 }
  24
  25 unsigned int test_lzcnt_u32(unsigned int __X)
  26 {
  27   // CHECK: @llvm.ctlz.i32(i32 %{{.*}}, i1 false)
  28   return _lzcnt_u32(__X);
  29 }
  30
  31 unsigned long long test__lzcnt_u64(unsigned long long __X)
  32 {
  33   // CHECK: @llvm.ctlz.i64(i64 %{{.*}}, i1 false)
  34   return _lzcnt_u64(__X);
  35 }
  36
  37
  38 // Test constexpr handling.
  39 #if defined(__cplusplus) && (__cplusplus >= 201103L)
  40 char lzcnt16_0[__lzcnt16(0x0000) == 16 ? 1 : -1];
  41 char lzcnt16_1[__lzcnt16(0x8000) ==  0 ? 1 : -1];
  42 char lzcnt16_2[__lzcnt16(0x0010) == 11 ? 1 : -1];
  43
  44 char lzcnt32_0[__lzcnt32(0x00000000) == 32 ? 1 : -1];
  45 char lzcnt32_1[__lzcnt32(0x80000000) ==  0 ? 1 : -1];
  46 char lzcnt32_2[__lzcnt32(0x00000010) == 27 ? 1 : -1];
  47
  48 char lzcnt64_0[__lzcnt64(0x0000000000000000ULL) == 64 ? 1 : -1];
  49 char lzcnt64_1[__lzcnt64(0x8000000000000000ULL) ==  0 ? 1 : -1];
  50 char lzcnt64_2[__lzcnt64(0x0000000100000000ULL) == 31 ? 1 : -1];
  51
  52 char lzcntu32_0[_lzcnt_u32(0x00000000) == 32 ? 1 : -1];
  53 char lzcntu32_1[_lzcnt_u32(0x80000000) ==  0 ? 1 : -1];
  54 char lzcntu32_2[_lzcnt_u32(0x00000010) == 27 ? 1 : -1];
  55
  56 char lzcntu64_0[_lzcnt_u64(0x0000000000000000ULL) == 64 ? 1 : -1];
  57 char lzcntu64_1[_lzcnt_u64(0x8000000000000000ULL) ==  0 ? 1 : -1];
  58 char lzcntu64_2[_lzcnt_u64(0x0000000100000000ULL) == 31 ? 1 : -1];
  59 #endif