gcc/testsuite/gcc.target/aarch64/_Float16_3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -march=armv8.2-a+nofp16 -std=c11 -ffp-contract=fast" } */
   3 /* { dg-skip-if "" { *-*-* } { "-mcpu=*" } { "" } } */
   4
   5 #pragma GCC target ("arch=armv8.2-a+nofp16")
   6
   7 _Float16
   8 foo_v8 (_Float16 x, _Float16 y, unsigned int *eval)
   9 {
  10   *eval = __FLT_EVAL_METHOD__;
  11   return x * x + y;
  12 }
  13
  14 __fp16
  15 bar_v8 (__fp16 x, __fp16 y, unsigned int *eval)
  16 {
  17   *eval = __FLT_EVAL_METHOD__;
  18   return x * x + y;
  19 }
  20
  21 #pragma GCC target ("arch=armv8.2-a+fp16")
  22
  23 _Float16
  24 foo_v82 (_Float16 x, _Float16 y, unsigned int *eval)
  25 {
  26   *eval = __FLT_EVAL_METHOD__;
  27   return x * x + y;
  28 }
  29
  30 __fp16
  31 bar_v82 (__fp16 x, __fp16 y, unsigned int *eval)
  32 {
  33   *eval = __FLT_EVAL_METHOD__;
  34   return x * x + y;
  35 }
  36
  37 /* Test that we merge to FMA operations.  This indicates that we are not
  38    making extraneous conversions between modes.  */
  39
  40 /* Three FMA operations in 32-bit precision, from foo_v8, bar_v8, bar_v82.  */
  41 /* { dg-final { scan-assembler-times "fmadd\ts\[0-9\]\+" 3 } } */
  42
  43 /* One FMA operation in 16-bit precision, from foo_v82.  */
  44 /* { dg-final { scan-assembler-times "fmadd\th\[0-9\]\+" 1 } } */
  45
  46 /* Test that in C11 mode, we don't reset __FLT_EVAL_METHOD__.  */
  47 /* { dg-final { scan-assembler-times "str\twzr" 4 } } */