vfpinstr.h

Go to the documentation of this file.

/*
 *  linux/arch/arm/vfp/vfpinstr.h
 *
 *  Copyright (C) 2004 ARM Limited.
 *  Written by Deep Blue Solutions Limited.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * VFP instruction masks.
 */
#define INST_CPRTDO(inst)   (((inst) & 0x0f000000) == 0x0e000000)
#define INST_CPRT(inst)     ((inst) & (1 << 4))
#define INST_CPRT_L(inst)   ((inst) & (1 << 20))
#define INST_CPRT_Rd(inst)  (((inst) & (15 << 12)) >> 12)
#define INST_CPRT_OP(inst)  (((inst) >> 21) & 7)
#define INST_CPNUM(inst)    ((inst) & 0xf00)
#define CPNUM(cp)       ((cp) << 8)

#define FOP_MASK    (0x00b00040)
#define FOP_FMAC    (0x00000000)
#define FOP_FNMAC   (0x00000040)
#define FOP_FMSC    (0x00100000)
#define FOP_FNMSC   (0x00100040)
#define FOP_FMUL    (0x00200000)
#define FOP_FNMUL   (0x00200040)
#define FOP_FADD    (0x00300000)
#define FOP_FSUB    (0x00300040)
#define FOP_FDIV    (0x00800000)
#define FOP_EXT     (0x00b00040)

#define FOP_TO_IDX(inst)    ((inst & 0x00b00000) >> 20 | (inst & (1 << 6)) >> 4)

#define FEXT_MASK   (0x000f0080)
#define FEXT_FCPY   (0x00000000)
#define FEXT_FABS   (0x00000080)
#define FEXT_FNEG   (0x00010000)
#define FEXT_FSQRT  (0x00010080)
#define FEXT_FCMP   (0x00040000)
#define FEXT_FCMPE  (0x00040080)
#define FEXT_FCMPZ  (0x00050000)
#define FEXT_FCMPEZ (0x00050080)
#define FEXT_FCVT   (0x00070080)
#define FEXT_FUITO  (0x00080000)
#define FEXT_FSITO  (0x00080080)
#define FEXT_FTOUI  (0x000c0000)
#define FEXT_FTOUIZ (0x000c0080)
#define FEXT_FTOSI  (0x000d0000)
#define FEXT_FTOSIZ (0x000d0080)

#define FEXT_TO_IDX(inst)   ((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7)

#define vfp_get_sd(inst)    ((inst & 0x0000f000) >> 11 | (inst & (1 << 22)) >> 22)
#define vfp_get_dd(inst)    ((inst & 0x0000f000) >> 12 | (inst & (1 << 22)) >> 18)
#define vfp_get_sm(inst)    ((inst & 0x0000000f) << 1 | (inst & (1 << 5)) >> 5)
#define vfp_get_dm(inst)    ((inst & 0x0000000f) | (inst & (1 << 5)) >> 1)
#define vfp_get_sn(inst)    ((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7)
#define vfp_get_dn(inst)    ((inst & 0x000f0000) >> 16 | (inst & (1 << 7)) >> 3)

#define vfp_single(inst)    (((inst) & 0x0000f00) == 0xa00)

#define FPSCR_N (1 << 31)
#define FPSCR_Z (1 << 30)
#define FPSCR_C (1 << 29)
#define FPSCR_V (1 << 28)

/*
 * Since we aren't building with -mfpu=vfp, we need to code
 * these instructions using their MRC/MCR equivalents.
 */
#define vfpreg(_vfp_) #_vfp_

#define fmrx(_vfp_) ({          \
    u32 __v;            \
    asm("mrc p10, 7, %0, " vfpreg(_vfp_) ", cr0, 0 @ fmrx   %0, " #_vfp_    \
        : "=r" (__v) : : "cc"); \
    __v;                \
 })

#define fmxr(_vfp_,_var_)       \
    asm("mcr p10, 7, %0, " vfpreg(_vfp_) ", cr0, 0 @ fmxr   " #_vfp_ ", %0" \
       : : "r" (_var_) : "cc")

u32 vfp_single_cpdo(u32 inst, u32 fpscr);
u32 vfp_single_cprt(u32 inst, u32 fpscr, struct pt_regs *regs);

u32 vfp_double_cpdo(u32 inst, u32 fpscr);