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lib/libm: Reduce size of static two_over_pi array. 

Thanks to Jeff Epler for the idea.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2020-09-04 00:32:39 +10:00
parent 40ad8f1666
commit 38959ed8f1
3 changed files with 5 additions and 5 deletions
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4
lib/libm/ef_rem_pio2.c
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@ -35,9 +35,9 @@
* Table of constants for 2/pi, 396 Hex digits (476 decimal) of 2/pi * Table of constants for 2/pi, 396 Hex digits (476 decimal) of 2/pi
*/ */
#ifdef __STDC__ #ifdef __STDC__
static const __int32_t two_over_pi[] = { static const __uint8_t two_over_pi[] = {
#else #else
static __int32_t two_over_pi[] = { static __uint8_t two_over_pi[] = {
#endif #endif
0xA2, 0xF9, 0x83, 0x6E, 0x4E, 0x44, 0x15, 0x29, 0xFC, 0xA2, 0xF9, 0x83, 0x6E, 0x4E, 0x44, 0x15, 0x29, 0xFC,
0x27, 0x57, 0xD1, 0xF5, 0x34, 0xDD, 0xC0, 0xDB, 0x62, 0x27, 0x57, 0xD1, 0xF5, 0x34, 0xDD, 0xC0, 0xDB, 0x62,

2
lib/libm/fdlibm.h
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@ -188,7 +188,7 @@ extern float __ieee754_scalbf __P((float,float));
extern float __kernel_sinf __P((float,float,int)); extern float __kernel_sinf __P((float,float,int));
extern float __kernel_cosf __P((float,float)); extern float __kernel_cosf __P((float,float));
extern float __kernel_tanf __P((float,float,int)); extern float __kernel_tanf __P((float,float,int));
extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const __int32_t*)); extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const __uint8_t*));
/* A union which permits us to convert between a float and a 32 bit /* A union which permits us to convert between a float and a 32 bit
int. */ int. */

4
lib/libm/kf_rem_pio2.c
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@ -62,10 +62,10 @@ two8 = 2.5600000000e+02f, /* 0x43800000 */
twon8 = 3.9062500000e-03f; /* 0x3b800000 */ twon8 = 3.9062500000e-03f; /* 0x3b800000 */
#ifdef __STDC__ #ifdef __STDC__
int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const __int32_t *ipio2) int __kernel_rem_pio2f(float *x, float *y, int e0, int nx, int prec, const __uint8_t *ipio2)
#else #else
int __kernel_rem_pio2f(x,y,e0,nx,prec,ipio2) int __kernel_rem_pio2f(x,y,e0,nx,prec,ipio2)
float x[], y[]; int e0,nx,prec; __int32_t ipio2[]; float x[], y[]; int e0,nx,prec; __uint8_t ipio2[];
#endif #endif
{ {
__int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih; __int32_t jz,jx,jv,jp,jk,carry,n,iq[20],i,j,k,m,q0,ih;