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 { target { ! ia32 } } } */
   5 /* { dg-options "-O2 -mfma4 -mno-fma" } */
   6
   7 #ifndef __FP_FAST_FMAF
   8 # error "__FP_FAST_FMAF should be defined"
   9 #endif
  10 #ifndef __FP_FAST_FMA
  11 # error "__FP_FAST_FMA should be defined"
  12 #endif
  13
  14 float
  15 flt_mul_add (float a, float b, float c)
  16 {
  17   return __builtin_fmaf (a, b, c);
  18 }
  19
  20 double
  21 dbl_mul_add (double a, double b, double c)
  22 {
  23   return __builtin_fma (a, b, c);
  24 }
  25
  26 float
  27 flt_mul_sub (float a, float b, float c)
  28 {
  29   return __builtin_fmaf (a, b, -c);
  30 }
  31
  32 double
  33 dbl_mul_sub (double a, double b, double c)
  34 {
  35   return __builtin_fma (a, b, -c);
  36 }
  37
  38 float
  39 flt_neg_mul_add_1 (float a, float b, float c)
  40 {
  41   return __builtin_fmaf (-a, b, c);
  42 }
  43
  44 double
  45 dbl_neg_mul_add_1 (double a, double b, double c)
  46 {
  47   return __builtin_fma (-a, b, c);
  48 }
  49
  50 float
  51 flt_neg_mul_add_2 (float a, float b, float c)
  52 {
  53   return __builtin_fmaf (a, -b, c);
  54 }
  55
  56 double
  57 dbl_neg_mul_add_2 (double a, double b, double c)
  58 {
  59   return __builtin_fma (a, -b, c);
  60 }
  61
  62 float
  63 flt_neg_mul_sub (float a, float b, float c)
  64 {
  65   return __builtin_fmaf (-a, b, -c);
  66 }
  67
  68 double
  69 dbl_neg_mul_sub (double a, double b, double c)
  70 {
  71   return __builtin_fma (-a, b, -c);
  72 }
  73
  74 /* { dg-final { scan-assembler-times "vfmaddss" 1 } } */
  75 /* { dg-final { scan-assembler-times "vfmaddsd" 1 } } */
  76 /* { dg-final { scan-assembler-times "vfmsubss" 1 } } */
  77 /* { dg-final { scan-assembler-times "vfmsubsd" 1 } } */
  78 /* { dg-final { scan-assembler-times "vfnmaddss" 2 } } */
  79 /* { dg-final { scan-assembler-times "vfnmaddsd" 2 } } */
  80 /* { dg-final { scan-assembler-times "vfnmsubss" 1 } } */
  81 /* { dg-final { scan-assembler-times "vfnmsubsd" 1 } } */