gcc/testsuite/gcc.target/i386/fma4-builtin.c

   1 /* Test that the compiler properly generates floating point multiply
   2    and add instructions FMA4 systems.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target lp64 } */
   6 /* { dg-options "-O2 -mfma4" } */
   7
   8 #ifndef __FP_FAST_FMAF
   9 # error "__FP_FAST_FMAF should be defined"
  10 #endif
  11 #ifndef __FP_FAST_FMA
  12 # error "__FP_FAST_FMA should be defined"
  13 #endif
  14
  15 float
  16 flt_mul_add (float a, float b, float c)
  17 {
  18   return __builtin_fmaf (a, b, c);
  19 }
  20
  21 double
  22 dbl_mul_add (double a, double b, double c)
  23 {
  24   return __builtin_fma (a, b, c);
  25 }
  26
  27 float
  28 flt_mul_sub (float a, float b, float c)
  29 {
  30   return __builtin_fmaf (a, b, -c);
  31 }
  32
  33 double
  34 dbl_mul_sub (double a, double b, double c)
  35 {
  36   return __builtin_fma (a, b, -c);
  37 }
  38
  39 float
  40 flt_neg_mul_add_1 (float a, float b, float c)
  41 {
  42   return __builtin_fmaf (-a, b, c);
  43 }
  44
  45 double
  46 dbl_neg_mul_add_1 (double a, double b, double c)
  47 {
  48   return __builtin_fma (-a, b, c);
  49 }
  50
  51 float
  52 flt_neg_mul_add_2 (float a, float b, float c)
  53 {
  54   return __builtin_fmaf (a, -b, c);
  55 }
  56
  57 double
  58 dbl_neg_mul_add_2 (double a, double b, double c)
  59 {
  60   return __builtin_fma (a, -b, c);
  61 }
  62
  63 float
  64 flt_neg_mul_sub (float a, float b, float c)
  65 {
  66   return __builtin_fmaf (-a, b, -c);
  67 }
  68
  69 double
  70 dbl_neg_mul_sub (double a, double b, double c)
  71 {
  72   return __builtin_fma (-a, b, -c);
  73 }
  74
  75 /* { dg-final { scan-assembler-times "vfmaddss" 1 } } */
  76 /* { dg-final { scan-assembler-times "vfmaddsd" 1 } } */
  77 /* { dg-final { scan-assembler-times "vfmsubss" 1 } } */
  78 /* { dg-final { scan-assembler-times "vfmsubsd" 1 } } */
  79 /* { dg-final { scan-assembler-times "vfnmaddss" 2 } } */
  80 /* { dg-final { scan-assembler-times "vfnmaddsd" 2 } } */
  81 /* { dg-final { scan-assembler-times "vfnmsubss" 1 } } */
  82 /* { dg-final { scan-assembler-times "vfnmsubsd" 1 } } */