69f3e63a09
state and AVX state. MFC after: 1 week
161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Floating Point Data Structures and Constants
|
|
* W. Jolitz 1/90
|
|
*/
|
|
|
|
#ifndef _MACHINE_FPU_H_
|
|
#define _MACHINE_FPU_H_
|
|
|
|
/* Contents of each x87 floating point accumulator */
|
|
struct fpacc87 {
|
|
uint8_t fp_bytes[10];
|
|
};
|
|
|
|
/* Contents of each SSE extended accumulator */
|
|
struct xmmacc {
|
|
uint8_t xmm_bytes[16];
|
|
};
|
|
|
|
/* Contents of the upper 16 bytes of each AVX extended accumulator */
|
|
struct ymmacc {
|
|
uint8_t ymm_bytes[16];
|
|
};
|
|
|
|
struct envxmm {
|
|
uint16_t en_cw; /* control word (16bits) */
|
|
uint16_t en_sw; /* status word (16bits) */
|
|
uint8_t en_tw; /* tag word (8bits) */
|
|
uint8_t en_zero;
|
|
uint16_t en_opcode; /* opcode last executed (11 bits ) */
|
|
uint64_t en_rip; /* floating point instruction pointer */
|
|
uint64_t en_rdp; /* floating operand pointer */
|
|
uint32_t en_mxcsr; /* SSE sontorol/status register */
|
|
uint32_t en_mxcsr_mask; /* valid bits in mxcsr */
|
|
};
|
|
|
|
struct savefpu {
|
|
struct envxmm sv_env;
|
|
struct {
|
|
struct fpacc87 fp_acc;
|
|
uint8_t fp_pad[6]; /* padding */
|
|
} sv_fp[8];
|
|
struct xmmacc sv_xmm[16];
|
|
uint8_t sv_pad[96];
|
|
} __aligned(16);
|
|
|
|
struct xstate_hdr {
|
|
uint64_t xstate_bv;
|
|
uint8_t xstate_rsrv0[16];
|
|
uint8_t xstate_rsrv[40];
|
|
};
|
|
|
|
struct savefpu_xstate {
|
|
struct xstate_hdr sx_hd;
|
|
struct ymmacc sx_ymm[16];
|
|
};
|
|
|
|
struct savefpu_ymm {
|
|
struct envxmm sv_env;
|
|
struct {
|
|
struct fpacc87 fp_acc;
|
|
int8_t fp_pad[6]; /* padding */
|
|
} sv_fp[8];
|
|
struct xmmacc sv_xmm[16];
|
|
uint8_t sv_pad[96];
|
|
struct savefpu_xstate sv_xstate;
|
|
} __aligned(64);
|
|
|
|
#ifdef _KERNEL
|
|
struct fpu_kern_ctx {
|
|
struct savefpu hwstate;
|
|
struct savefpu *prev;
|
|
uint32_t flags;
|
|
};
|
|
#define FPU_KERN_CTX_FPUINITDONE 0x01
|
|
|
|
#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
|
|
#endif
|
|
|
|
/*
|
|
* The hardware default control word for i387's and later coprocessors is
|
|
* 0x37F, giving:
|
|
*
|
|
* round to nearest
|
|
* 64-bit precision
|
|
* all exceptions masked.
|
|
*
|
|
* FreeBSD/i386 uses 53 bit precision for things like fadd/fsub/fsqrt etc
|
|
* because of the difference between memory and fpu register stack arguments.
|
|
* If its using an intermediate fpu register, it has 80/64 bits to work
|
|
* with. If it uses memory, it has 64/53 bits to work with. However,
|
|
* gcc is aware of this and goes to a fair bit of trouble to make the
|
|
* best use of it.
|
|
*
|
|
* This is mostly academic for AMD64, because the ABI prefers the use
|
|
* SSE2 based math. For FreeBSD/amd64, we go with the default settings.
|
|
*/
|
|
#define __INITIAL_FPUCW__ 0x037F
|
|
#define __INITIAL_FPUCW_I386__ 0x127F
|
|
#define __INITIAL_MXCSR__ 0x1F80
|
|
#define __INITIAL_MXCSR_MASK__ 0xFFBF
|
|
|
|
#ifdef _KERNEL
|
|
void fpudna(void);
|
|
void fpudrop(void);
|
|
void fpuexit(struct thread *td);
|
|
int fpuformat(void);
|
|
int fpugetregs(struct thread *td);
|
|
void fpuinit(void);
|
|
void fpusetregs(struct thread *td, struct savefpu *addr);
|
|
int fputrap(void);
|
|
void fpuuserinited(struct thread *td);
|
|
int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
|
|
u_int flags);
|
|
int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
|
|
int fpu_kern_thread(u_int flags);
|
|
int is_fpu_kern_thread(u_int flags);
|
|
|
|
/*
|
|
* Flags for fpu_kern_enter() and fpu_kern_thread().
|
|
*/
|
|
#define FPU_KERN_NORMAL 0x0000
|
|
|
|
#endif
|
|
|
|
#endif /* !_MACHINE_FPU_H_ */
|