fpu.h
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上传日期:2013-04-10
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- #ifndef _ASM_IA64_FPU_H
- #define _ASM_IA64_FPU_H
- /*
- * Copyright (C) 1998, 1999 Hewlett-Packard Co
- * Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
- */
- #include <asm/types.h>
- /* floating point status register: */
- #define FPSR_TRAP_VD (1 << 0) /* invalid op trap disabled */
- #define FPSR_TRAP_DD (1 << 1) /* denormal trap disabled */
- #define FPSR_TRAP_ZD (1 << 2) /* zero-divide trap disabled */
- #define FPSR_TRAP_OD (1 << 3) /* overflow trap disabled */
- #define FPSR_TRAP_UD (1 << 4) /* underflow trap disabled */
- #define FPSR_TRAP_ID (1 << 5) /* inexact trap disabled */
- #define FPSR_S0(x) ((x) << 6)
- #define FPSR_S1(x) ((x) << 19)
- #define FPSR_S2(x) (__IA64_UL(x) << 32)
- #define FPSR_S3(x) (__IA64_UL(x) << 45)
- /* floating-point status field controls: */
- #define FPSF_FTZ (1 << 0) /* flush-to-zero */
- #define FPSF_WRE (1 << 1) /* widest-range exponent */
- #define FPSF_PC(x) (((x) & 0x3) << 2) /* precision control */
- #define FPSF_RC(x) (((x) & 0x3) << 4) /* rounding control */
- #define FPSF_TD (1 << 6) /* trap disabled */
- /* floating-point status field flags: */
- #define FPSF_V (1 << 7) /* invalid operation flag */
- #define FPSF_D (1 << 8) /* denormal/unnormal operand flag */
- #define FPSF_Z (1 << 9) /* zero divide (IEEE) flag */
- #define FPSF_O (1 << 10) /* overflow (IEEE) flag */
- #define FPSF_U (1 << 11) /* underflow (IEEE) flag */
- #define FPSF_I (1 << 12) /* inexact (IEEE) flag) */
- /* floating-point rounding control: */
- #define FPRC_NEAREST 0x0
- #define FPRC_NEGINF 0x1
- #define FPRC_POSINF 0x2
- #define FPRC_TRUNC 0x3
- #define FPSF_DEFAULT (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST))
- /* This default value is the same as HP-UX uses. Don't change it
- without a very good reason. */
- #define FPSR_DEFAULT (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD
- | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID
- | FPSR_S0 (FPSF_DEFAULT)
- | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE)
- | FPSR_S2 (FPSF_DEFAULT | FPSF_TD)
- | FPSR_S3 (FPSF_DEFAULT | FPSF_TD))
- # ifndef __ASSEMBLY__
- struct ia64_fpreg {
- union {
- unsigned long bits[2];
- } u;
- } __attribute__ ((aligned (16)));
- # endif /* __ASSEMBLY__ */
- #endif /* _ASM_IA64_FPU_H */