powr?i?/powi?i?

接口定义

C interface：

complex double powc16i4(complex double x, int y);

complex double powc16i4_18(complex double x, int y);

int powi4i4(int x, int y);

int powi4i4_18(int x, int y);

int64_t powi8i4(int64_t x, int y);

int64_t powi8i4_18(int64_t x, int y);

int64_t powi8i8(int64_t x, int64_t y);

float powr4i4(float x, int y);

double powr8i4(double x, int y);

long double powr16i4(long double x, int y);

依赖

C: "km.h"

示例

C interface：

   // typical usage 
    printf("powi4i4(1, 2) = %d\n", powi4i4(1, 2));
    printf("powi4i4(3, 4) = %d\n", powi4i4(3, 4));
    printf("powr4i4(1.0, 2) = %.15f\n", powr4i4(1.0, 2));
    printf("powr4i4(3.0, 4) = %.15f\n", powr4i4(3.0, 4));
    printf("powr4i4(INFINITY, 2) = %.15f\n", powr4i4(INFINITY, 2));
    printf("powr4i4(INFINITY, 3) = %.15f\n", powr4i4(INFINITY, 3));
    printf("powr4i4(-INFINITY, 3) = %.15f\n", powr4i4(-INFINITY, 3));

    /* 
     * powi4i4(1, 2) = 1
     * powi4i4(3, 4) = 81
     * powr4i4(1.0, 2) = 1.000000000000000
     * powr4i4(3.0, 4) = 81.000000000000000
     * powr4i4(INFINITY, 2) = inf
     * powr4i4(INFINITY, 3) = inf
     * powr4i4(-INFINITY, 3) = -inf
     * 
     * */