1 #ifndef _ASM_IA64_FPU_H 2 #define _ASM_IA64_FPU_H 3 4 /* 5 * Copyright (C) 1998, 1999, 2002, 2003 Hewlett-Packard Co 6 * David Mosberger-Tang <davidm@hpl.hp.com> 7 */ 8 9 #include <linux/types.h> 10 11 /* floating point status register: */ 12 #define FPSR_TRAP_VD (1 << 0) /* invalid op trap disabled */ 13 #define FPSR_TRAP_DD (1 << 1) /* denormal trap disabled */ 14 #define FPSR_TRAP_ZD (1 << 2) /* zero-divide trap disabled */ 15 #define FPSR_TRAP_OD (1 << 3) /* overflow trap disabled */ 16 #define FPSR_TRAP_UD (1 << 4) /* underflow trap disabled */ 17 #define FPSR_TRAP_ID (1 << 5) /* inexact trap disabled */ 18 #define FPSR_S0(x) ((x) << 6) 19 #define FPSR_S1(x) ((x) << 19) 20 #define FPSR_S2(x) (__IA64_UL(x) << 32) 21 #define FPSR_S3(x) (__IA64_UL(x) << 45) 22 23 /* floating-point status field controls: */ 24 #define FPSF_FTZ (1 << 0) /* flush-to-zero */ 25 #define FPSF_WRE (1 << 1) /* widest-range exponent */ 26 #define FPSF_PC(x) (((x) & 0x3) << 2) /* precision control */ 27 #define FPSF_RC(x) (((x) & 0x3) << 4) /* rounding control */ 28 #define FPSF_TD (1 << 6) /* trap disabled */ 29 30 /* floating-point status field flags: */ 31 #define FPSF_V (1 << 7) /* invalid operation flag */ 32 #define FPSF_D (1 << 8) /* denormal/unnormal operand flag */ 33 #define FPSF_Z (1 << 9) /* zero divide (IEEE) flag */ 34 #define FPSF_O (1 << 10) /* overflow (IEEE) flag */ 35 #define FPSF_U (1 << 11) /* underflow (IEEE) flag */ 36 #define FPSF_I (1 << 12) /* inexact (IEEE) flag) */ 37 38 /* floating-point rounding control: */ 39 #define FPRC_NEAREST 0x0 40 #define FPRC_NEGINF 0x1 41 #define FPRC_POSINF 0x2 42 #define FPRC_TRUNC 0x3 43 44 #define FPSF_DEFAULT (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST)) 45 46 /* This default value is the same as HP-UX uses. Don't change it 47 without a very good reason. */ 48 #define FPSR_DEFAULT (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD \ 49 | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID \ 50 | FPSR_S0 (FPSF_DEFAULT) \ 51 | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE) \ 52 | FPSR_S2 (FPSF_DEFAULT | FPSF_TD) \ 53 | FPSR_S3 (FPSF_DEFAULT | FPSF_TD)) 54 55 # ifndef __ASSEMBLY__ 56 57 struct ia64_fpreg { 58 union { 59 unsigned long bits[2]; 60 long double __dummy; /* force 16-byte alignment */ 61 } u; 62 }; 63 64 # endif /* __ASSEMBLY__ */ 65 66 #endif /* _ASM_IA64_FPU_H */ 67