gcc/testsuite/gcc.dg/torture/builtin-power-1.c

   1 /* Copyright (C) 2004  Free Software Foundation.
   2
   3    Verify that built-in folding of various math "power" functions is
   4    correctly performed by the compiler.
   5
   6    Written by Kaveh Ghazi, 2004-03-11.  */
   7
   8 /* { dg-do link } */
   9 /* { dg-options "-ffast-math" } */
  10 /* { dg-add-options c99_runtime } */
  11
  12 #include "../builtins-config.h"
  13
  14 #ifdef HAVE_C99_RUNTIME
  15 #define C99CODE(CODE) CODE
  16 #else
  17 #define C99CODE(CODE) 0
  18 #endif
  19
  20 #define PROTOTYPE(FN) extern double FN(double); extern float FN##f(float); \
  21   extern long double FN##l(long double);
  22 #define PROTOTYPE2(FN) extern double FN(double, double); \
  23   extern float FN##f(float, float); \
  24   extern long double FN##l(long double, long double);
  25
  26 PROTOTYPE(fabs)
  27 PROTOTYPE(sqrt)
  28 PROTOTYPE(cbrt)
  29 PROTOTYPE2(pow)
  30
  31 void test(double d1, double d2, double d3,
  32           float f1, float f2, float f3,
  33           long double ld1, long double ld2, long double ld3)
  34 {
  35   /* Test N1root(N2root(x)) -> pow(x,1/(N1*N2)).  */
  36   /* E.g. sqrt(cbrt(x)) -> pow(x,1/6).  */
  37   /* The `ABS' argument is `fabs' when the transformation only works
  38      for nonnegative arguments.  Otherwise it's blank.  */
  39 #define ROOT_ROOT(FN1,N1,FN2,N2,ABS) \
  40  extern void link_failure_##FN1##_##FN2(void); \
  41  if (FN1(FN2(ABS(d1))) != pow(ABS(d1),1.0/(N1*N2)) \
  42      || C99CODE (FN1##f(FN2##f(ABS(f1))) != powf(ABS(f1),1.0F/(N1*N2))) \
  43      || C99CODE (FN1##l(FN2##l(ABS(ld1))) != powl(ABS(ld1),1.0L/(N1*N2)))) \
  44     link_failure_##FN1##_##FN2()
  45
  46   ROOT_ROOT(sqrt,2,sqrt,2,);
  47   ROOT_ROOT(sqrt,2,cbrt,3,);
  48   ROOT_ROOT(cbrt,3,sqrt,2,);
  49   ROOT_ROOT(cbrt,3,cbrt,3,fabs);
  50
  51   /* Test pow(Nroot(x),y) -> pow(x,y/N).  */
  52   /* The `ABS' argument is `fabs' when the transformation only works
  53      for nonnegative arguments.  Otherwise it's blank.  */
  54 #define POW_ROOT(FN,N,ABS) \
  55  extern void link_failure_pow_##FN(void); \
  56  if (pow(FN(ABS(d1)), d2) != pow(ABS(d1),d2/N) \
  57      || powf(FN##f(ABS(f1)),f2) != powf(ABS(f1),f2/N) \
  58      || powl(FN##l(ABS(ld1)),ld2) != powl(ABS(ld1),ld2/N)) \
  59     link_failure_pow_##FN()
  60
  61   POW_ROOT(sqrt,2,);
  62   POW_ROOT(cbrt,3,fabs);
  63
  64   /* Test Nroot(pow(x,y)) -> pow(x,y/N).  */
  65   /* The `ABS' argument is `fabs' when the transformation only works
  66      for nonnegative arguments.  Otherwise it's blank.  */
  67 #define ROOT_POW(FN,N,ABS) \
  68  extern void link_failure_##FN##_pow(void); \
  69  if (FN(pow(ABS(d1), d2)) != pow(ABS(d1),d2/N) \
  70      || FN##f(powf(ABS(f1),f2)) != powf(ABS(f1),f2/N) \
  71      || FN##l(powl(ABS(ld1),ld2)) != powl(ABS(ld1),ld2/N)) \
  72     link_failure_##FN##_pow()
  73
  74   ROOT_POW(sqrt,2,fabs);
  75   ROOT_POW(cbrt,3,fabs);
  76
  77   /* Test pow(pow(x,y),z) -> pow(x,y*z).  */
  78 #define POW_POW \
  79  extern void link_failure_pow_pow(void); \
  80  if (pow(pow(fabs(d1), d2), d3) != pow(fabs(d1),d2*d3) \
  81      || powf(powf(fabs(f1),f2),f3) != powf(fabs(f1),f2*f3) \
  82      || powl(powl(fabs(ld1),ld2),ld3) != powl(fabs(ld1),ld2*ld3)) \
  83     link_failure_pow_pow()
  84
  85   POW_POW;
  86
  87   /* Test Nroot(x)*Nroot(y) -> Nroot(x*y).  */
  88 #define ROOT_X_ROOT(FN) \
  89  extern void link_failure_root_x_root(void); \
  90  if (FN(d1)*FN(d2) != FN(d1*d2) \
  91      || FN##f(f1)*FN##f(f2) != FN##f(f1*f2) \
  92      || FN##l(ld1)*FN##l(ld2) != FN##l(ld1*ld2)) \
  93     link_failure_root_x_root()
  94
  95   ROOT_X_ROOT(sqrt);
  96   ROOT_X_ROOT(cbrt);
  97
  98   /* Test pow(x,y)*pow(x,z) -> pow(x,y+z).  */
  99 #define POW_X_POW \
 100  extern void link_failure_pow_x_pow(void); \
 101  if (pow(d1,d2)*pow(d1,d3) != pow(d1,d2+d3) \
 102      || powf(f1,f2)*powf(f1,f3) != powf(f1,f2+f3) \
 103      || powl(ld1,ld2)*powl(ld1,ld3) != powl(ld1,ld2+ld3)) \
 104     link_failure_pow_x_pow()
 105
 106   POW_X_POW;
 107
 108 }
 109
 110 int main (void)
 111 {
 112   return 0;
 113 }