2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/* $NetBSD: fpu.h,v 1.1 2003/04/26 18:39:40 fvdl Exp $ */
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#ifndef _AMD64_FPU_H_
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#define _AMD64_FPU_H_
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/*
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* NetBSD/amd64 only uses the extended save/restore format used
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* by fxsave/fsrestore, to always deal with the SSE registers,
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* which are part of the ABI to pass floating point values.
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* Must be stored in memory on a 16-byte boundary.
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*/
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struct fxsave64 {
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u_int16_t fx_fcw;
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u_int16_t fx_fsw;
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u_int8_t fx_ftw;
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u_int8_t fx_unused1;
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u_int16_t fx_fop;
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u_int64_t fx_rip;
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u_int64_t fx_rdp;
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u_int32_t fx_mxcsr;
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u_int32_t fx_mxcsr_mask;
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u_int64_t fx_st[8][2]; /* 8 normal FP regs */
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u_int64_t fx_xmm[16][2]; /* 16 SSE2 registers */
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u_int8_t fx_unused3[96];
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} __attribute__((packed));
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struct savefpu {
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struct fxsave64 fp_fxsave; /* see above */
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u_int16_t fp_ex_sw; /* saved status from last exception */
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u_int16_t fp_ex_tw; /* saved tag from last exception */
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};
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#ifdef _KERNEL
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/*
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* This one only used for backward compat coredumping.
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*/
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struct oldfsave {
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u_int16_t fs_control;
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u_int16_t fs_unused0;
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u_int16_t fs_status;
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u_int16_t fs_unused1;
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u_int16_t fs_tag;
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u_int16_t fs_unused2;
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u_int32_t fs_ipoff;
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u_int16_t fs_ipsel;
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u_int16_t fs_op;
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u_int32_t fs_opoff;
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u_int16_t fs_opsel;
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} __attribute__ ((packed));
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#endif
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/*
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* The i387 defaults to Intel extended precision mode and round to nearest,
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* with all exceptions masked.
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*/
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#define __INITIAL_NPXCW__ 0x037f
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#define __INITIAL_MXCSR__ 0x1f80
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#define __INITIAL_MXCSR_MASK__ 0xffbf
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/* NetBSD uses IEEE double precision. */
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#define __NetBSD_NPXCW__ 0x127f
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/* Linux just uses the default control word. */
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#define __Linux_NPXCW__ 0x037f
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/*
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* The standard control word from finit is 0x37F, giving:
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* round to nearest
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* 64-bit precision
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* all exceptions masked.
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*
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* Now we want:
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* affine mode (if we decide to support 287's)
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* round to nearest
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* 53-bit precision
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* all exceptions masked.
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*
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* 64-bit precision often gives bad results with high level languages
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* because it makes the results of calculations depend on whether
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* intermediate values are stored in memory or in FPU registers.
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*/
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#ifdef _KERNEL
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/*
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* XXX
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*/
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struct trapframe;
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struct cpu_info;
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void fpuinit(struct cpu_info *);
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void fpudrop(void);
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void fpusave(struct lwp *);
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void fpudiscard(struct lwp *);
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void fputrap(struct trapframe *);
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void fpusave_lwp(struct lwp *, int);
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void fpusave_cpu(struct cpu_info *, int);
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#endif
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#endif /* _AMD64_FPU_H_ */
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