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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-ia64/] [fpu.h] - Blame information for rev 1275

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1 1275 phoenix
#ifndef _ASM_IA64_FPU_H
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#define _ASM_IA64_FPU_H
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/*
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 * Copyright (C) 1998, 1999, 2002, 2003 Hewlett-Packard Co
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 *      David Mosberger-Tang <davidm@hpl.hp.com>
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 */
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#include <asm/types.h>
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/* floating point status register: */
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#define FPSR_TRAP_VD    (1 << 0)        /* invalid op trap disabled */
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#define FPSR_TRAP_DD    (1 << 1)        /* denormal trap disabled */
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#define FPSR_TRAP_ZD    (1 << 2)        /* zero-divide trap disabled */
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#define FPSR_TRAP_OD    (1 << 3)        /* overflow trap disabled */
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#define FPSR_TRAP_UD    (1 << 4)        /* underflow trap disabled */
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#define FPSR_TRAP_ID    (1 << 5)        /* inexact trap disabled */
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#define FPSR_S0(x)      ((x) <<  6)
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#define FPSR_S1(x)      ((x) << 19)
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#define FPSR_S2(x)      (__IA64_UL(x) << 32)
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#define FPSR_S3(x)      (__IA64_UL(x) << 45)
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/* floating-point status field controls: */
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#define FPSF_FTZ        (1 << 0)                /* flush-to-zero */
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#define FPSF_WRE        (1 << 1)                /* widest-range exponent */
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#define FPSF_PC(x)      (((x) & 0x3) << 2)      /* precision control */
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#define FPSF_RC(x)      (((x) & 0x3) << 4)      /* rounding control */
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#define FPSF_TD         (1 << 6)                /* trap disabled */
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/* floating-point status field flags: */
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#define FPSF_V          (1 <<  7)               /* invalid operation flag */
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#define FPSF_D          (1 <<  8)               /* denormal/unnormal operand flag */
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#define FPSF_Z          (1 <<  9)               /* zero divide (IEEE) flag */
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#define FPSF_O          (1 << 10)               /* overflow (IEEE) flag */
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#define FPSF_U          (1 << 11)               /* underflow (IEEE) flag */
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#define FPSF_I          (1 << 12)               /* inexact (IEEE) flag) */
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/* floating-point rounding control: */
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#define FPRC_NEAREST    0x0
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#define FPRC_NEGINF     0x1
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#define FPRC_POSINF     0x2
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#define FPRC_TRUNC      0x3
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#define FPSF_DEFAULT    (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST))
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/* This default value is the same as HP-UX uses.  Don't change it
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   without a very good reason.  */
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#define FPSR_DEFAULT    (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD     \
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                         | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID   \
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                         | FPSR_S0 (FPSF_DEFAULT)                       \
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                         | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE)  \
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                         | FPSR_S2 (FPSF_DEFAULT | FPSF_TD)             \
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                         | FPSR_S3 (FPSF_DEFAULT | FPSF_TD))
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# ifndef __ASSEMBLY__
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struct ia64_fpreg {
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        union {
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                unsigned long bits[2];
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                long double __dummy;    /* force 16-byte alignment */
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        } u;
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};
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# endif /* __ASSEMBLY__ */
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#endif /* _ASM_IA64_FPU_H */

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