diff options
Diffstat (limited to '9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h')
| -rw-r--r-- | 9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h | 179 |
1 files changed, 53 insertions, 126 deletions
diff --git a/9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h b/9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h index cf2c1fc..c579969 100644 --- a/9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h +++ b/9/platforms/android-19/arch-arm64/usr/include/machine/ieee.h @@ -1,4 +1,4 @@ -/* $OpenBSD: ieee.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ +/* $OpenBSD: ieee.h,v 1.4 2011/11/08 17:06:51 deraadt Exp $ */ /* $NetBSD: ieee.h,v 1.2 2001/02/21 17:43:50 bjh21 Exp $ */ /* @@ -45,147 +45,74 @@ * @(#)ieee.h 8.1 (Berkeley) 6/11/93 */ -/* - * ieee.h defines the machine-dependent layout of the machine's IEEE - * floating point. - */ - -/* - * Define the number of bits in each fraction and exponent. - * - * k k+1 - * Note that 1.0 x 2 == 0.1 x 2 and that denorms are represented - * - * (-exp_bias+1) - * as fractions that look like 0.fffff x 2 . This means that - * - * -126 - * the number 0.10000 x 2 , for instance, is the same as the normalized - * - * -127 -128 - * float 1.0 x 2 . Thus, to represent 2 , we need one leading zero - * - * -129 - * in the fraction; to represent 2 , we need two, and so on. This - * - * (-exp_bias-fracbits+1) - * implies that the smallest denormalized number is 2 - * - * for whichever format we are talking about: for single precision, for - * - * -126 -149 - * instance, we get .00000000000000000000001 x 2 , or 1.0 x 2 , and - * - * -149 == -127 - 23 + 1. - */ - -/* - * The ARM has two sets of FP data formats. The FPA supports 32-bit, 64-bit - * and 96-bit IEEE formats, with the words in big-endian order. VFP supports - * 32-bin and 64-bit IEEE formats with the words in the CPU's native byte - * order. - * - * The FPA also has two packed decimal formats, but we ignore them here. - */ +#ifndef _MACHINE_IEEE_H_ +#define _MACHINE_IEEE_H_ -#define SNG_EXPBITS 8 -#define SNG_FRACBITS 23 +#include <sys/types.h> -#define DBL_EXPBITS 11 -#define DBL_FRACBITS 52 +__BEGIN_DECLS -#ifndef __VFP_FP__ -#define E80_EXPBITS 15 -#define E80_FRACBITS 64 +#define SNG_EXPBITS 8 +#define SNG_FRACBITS 23 -#define EXT_EXPBITS 15 -#define EXT_FRACBITS 112 -#endif +#define SNG_EXP_INFNAN 255 +#define SNG_EXP_BIAS 127 struct ieee_single { - u_int sng_frac:23; - u_int sng_exponent:8; - u_int sng_sign:1; + unsigned sng_frac:23; + unsigned sng_exp:8; + unsigned sng_sign:1; }; -#ifdef __VFP_FP__ -struct ieee_double { -#ifdef __AARCH64EB__ - u_int dbl_sign:1; - u_int dbl_exp:11; - u_int dbl_frach:20; - u_int dbl_fracl; -#else /* !__AARCH64EB__ */ - u_int dbl_fracl; - u_int dbl_frach:20; - u_int dbl_exp:11; - u_int dbl_sign:1; -#endif /* !__AARCH64EB__ */ -}; -#else /* !__VFP_FP__ */ +#define DBL_EXPBITS 11 +#define DBL_FRACHBITS 20 +#define DBL_FRACLBITS 32 +#define DBL_FRACBITS 52 + +#define DBL_EXP_INFNAN 2047 +#define DBL_EXP_BIAS 1023 + struct ieee_double { - u_int dbl_frach:20; - u_int dbl_exp:11; - u_int dbl_sign:1; - u_int dbl_fracl; + unsigned dbl_fracl; + unsigned dbl_frach:20; + unsigned dbl_exp:11; + unsigned dbl_sign:1; }; -union ieee_double_u { - double dblu_d; - struct ieee_double dblu_dbl; -}; +#if __LP64__ +/* 64-bit Android uses ld128 long doubles. */ -struct ieee_e80 { - u_int e80_exp:15; - u_int e80_zero:16; - u_int e80_sign:1; - u_int e80_frach:31; - u_int e80_j:1; - u_int e80_fracl; -}; +#define EXT_EXPBITS 15 +#define EXT_FRACHBITS 16 +#define EXT_FRACHMBITS 32 +#define EXT_FRACLMBITS 32 +#define EXT_FRACLBITS 32 +#define EXT_FRACBITS 112 + +#define EXT_EXP_INFNAN 32767 +#define EXT_EXP_BIAS 16383 + +#define EXT_IMPLICIT_NBIT + +#define EXT_TO_ARRAY32(p, a) do { \ + (a)[0] = (uint32_t)(p)->ext_fracl; \ + (a)[1] = (uint32_t)(p)->ext_fraclm; \ + (a)[2] = (uint32_t)(p)->ext_frachm; \ + (a)[3] = (uint32_t)(p)->ext_frach; \ +} while(0) struct ieee_ext { - u_int ext_frach:16; - u_int ext_exp:15; - u_int ext_sign:1; - u_int ext_frachm; - u_int ext_fraclm; - u_int ext_fracl; + unsigned ext_fracl; + unsigned ext_fraclm; + unsigned ext_frachm; + unsigned ext_frach:16; + unsigned ext_exp:15; + unsigned ext_sign:1; }; -#endif /* !__VFP_FP__ */ -/* - * Floats whose exponent is in [1..INFNAN) (of whatever type) are - * `normal'. Floats whose exponent is INFNAN are either Inf or NaN. - * Floats whose exponent is zero are either zero (iff all fraction - * bits are zero) or subnormal values. - * - * A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its - * high fraction; if the bit is set, it is a `quiet NaN'. - */ -#define SNG_EXP_INFNAN 255 -#define DBL_EXP_INFNAN 2047 -#ifndef __VFP_FP__ -#define E80_EXP_INFNAN 32767 -#define EXT_EXP_INFNAN 32767 -#endif /* !__VFP_FP__ */ - -#if 0 -#define SNG_QUIETNAN (1 << 22) -#define DBL_QUIETNAN (1 << 19) -#ifndef __VFP_FP__ -#define E80_QUIETNAN (1 << 15) -#define EXT_QUIETNAN (1 << 15) -#endif /* !__VFP_FP__ */ #endif -/* - * Exponent biases. - */ -#define SNG_EXP_BIAS 127 -#define DBL_EXP_BIAS 1023 -#ifndef __VFP_FP__ -#define E80_EXP_BIAS 16383 -#define EXT_EXP_BIAS 16383 -#endif /* !__VFP_FP__ */ +__END_DECLS + +#endif /* _MACHINE_IEEE_H_ */ |