/*- * Copyright (c) 1990 The Regents of the University of California. * Copyright (c) 2008 The DragonFly Project. * 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. * 3. 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: src/sys/i386/include/npx.h,v 1.18.2.1 2001/08/15 01:23:52 peter Exp $ */ /* * 287/387 NPX Coprocessor Data Structures and Constants * W. Jolitz 1/90 */ #ifndef _CPU_NPX_H_ #define _CPU_NPX_H_ #ifndef _SYS_STDINT_H_ #include <sys/stdint.h> #endif /* Environment information of floating point unit */ struct env87 { int32_t en_cw; /* control word (16bits) */ int32_t en_sw; /* status word (16bits) */ int32_t en_tw; /* tag word (16bits) */ int32_t en_fip; /* floating point instruction pointer */ uint16_t en_fcs; /* floating code segment selector */ uint16_t en_opcode; /* opcode last executed (11 bits ) */ int32_t en_foo; /* floating operand offset */ int32_t en_fos; /* floating operand segment selector */ }; /* Contents of each x87 floating point accumulator */ struct fpacc87 { uint8_t fp_bytes[10]; }; /* Floating point context (i386 fnsave/frstor) */ struct save87 { struct env87 sv_env; /* floating point control/status */ struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */ uint8_t sv_pad0[4]; /* saved status word (now unused) */ /* * Bogus padding for emulators. Emulators should use their own * struct and arrange to store into this struct (ending here) * before it is inspected for ptracing or for core dumps. Some * emulators overwrite the whole struct. We have no good way of * knowing how much padding to leave. Leave just enough for the * GPL emulator's i387_union (176 bytes total). */ uint8_t sv_pad[64]; }; struct envxmm { uint16_t en_cw; /* control word (16bits) */ uint16_t en_sw; /* status word (16bits) */ uint16_t en_tw; /* tag word (16bits) */ uint16_t en_opcode; /* opcode last executed (11 bits) */ uint32_t en_fip; /* fp instruction pointer */ uint16_t en_fcs; /* fp code segment selector */ uint16_t en_pad0; /* padding */ uint32_t en_foo; /* fp operand offset */ uint16_t en_fos; /* fp operand segment selector */ uint16_t en_pad1; /* padding */ uint32_t en_mxcsr; /* SSE control/status register */ uint32_t en_mxcsr_mask; /* valid bits in mxcsr */ }; /* Layout for code/data pointers relating to FP exceptions. */ union fp_addr { uint64_t fa_64; /* linear address for 64-bit system */ struct { uint32_t fa_off; /* linear address for 32-bit system */ uint16_t fa_seg; /* code/data (etc) segment */ uint16_t fa_opcode; /* last opcode (sometimes) */ } fa_32; }; struct envxmm64 { 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 ) */ union { /* fp instruction pointer */ uint64_t en_rip; union fp_addr en_ip64; }; union { /* fp operand pointer */ uint64_t en_rdp; union fp_addr en_dp64; }; uint32_t en_mxcsr; /* SSE control/status register */ uint32_t en_mxcsr_mask; /* valid bits in mxcsr */ }; /* 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]; }; /* * Floating point context. (i386 fxsave/fxrstor) * savexmm is a 512-byte structure */ struct savexmm { struct envxmm sv_env; /* 32 */ struct { struct fpacc87 fp_acc; uint8_t fp_pad[6]; } sv_fp[8]; /* 128 */ struct xmmacc sv_xmm[8]; /* 128 */ uint8_t sv_pad[224]; /* 224 */ } __aligned(16); /* * Floating point context. (amd64 fxsave/fxrstor) * savexmm64 is a 512-byte structure */ struct savexmm64 { struct envxmm64 sv_env; /* 32 */ struct { struct fpacc87 fp_acc; uint8_t fp_pad[6]; } sv_fp[8]; /* 128 */ struct xmmacc sv_xmm[16]; /* 256 */ uint8_t sv_pad[96]; /* 96 */ } __aligned(16); /* xstate_hdr is a 64-byte structure */ struct xstate_hdr { uint64_t xstate_bv; uint64_t xstate_xcomp_bv; uint8_t xstate_rsrv0[8]; uint8_t xstate_rsrv[40]; }; #define XSTATE_XCOMP_BV_COMPACT (1ULL << 63) /* savexmm_xstate is a 320-byte structure (64 + 256) */ struct savexmm_xstate { struct xstate_hdr sx_hd; struct ymmacc sx_ymm[16]; }; /* saveymm is a 832-byte structure (i386) */ struct saveymm { struct envxmm sv_env; /* 32 */ struct { struct fpacc87 fp_acc; uint8_t fp_pad[6]; } sv_fp[8]; /* 128 */ struct xmmacc sv_xmm[16]; /* 256 */ uint8_t sv_pad[96]; /* 96 */ struct savexmm_xstate sv_xstate; /* 320 */ } __aligned(64); /* saveymm64 is a 832-byte structure (amd64) */ struct saveymm64 { struct envxmm64 sv_env; /* 32 */ struct { struct fpacc87 fp_acc; int8_t fp_pad[6]; } sv_fp[8]; /* 128 */ struct xmmacc sv_xmm[16]; /* 256 */ uint8_t sv_pad[96]; /* 96 */ struct savexmm_xstate sv_xstate; /* 320 */ } __aligned(64); union savefpu { struct save87 sv_87; struct savexmm sv_xmm; struct saveymm sv_ymm; struct savexmm64 sv_xmm64; struct saveymm64 sv_ymm64; char sv_savearea[1024]; /* see mcontext_t */ }; /* * The hardware default control word for i387's and later coprocessors is * 0x37F, giving: * * round to nearest * 64-bit precision * all exceptions masked. * * We modify the affine mode bit and precision bits in this to give: * * affine mode for 287's (if they work at all) (1 in bitfield 1<<12) * 53-bit precision (2 in bitfield 3<<8) * * 64-bit precision often gives bad results with high level languages * because it makes the results of calculations depend on whether * intermediate values are stored in memory or in FPU registers. */ #define __INITIAL_NPXCW__ 0x127F #define __INITIAL_FPUCW__ 0x037F /* used by libm/arch/x86_64/fenv.c */ #define __INITIAL_FPUCW_I386__ 0x127F #define __INITIAL_MXCSR__ 0x1F80 /* used by libm/arch/x86_64/fenv.c */ #define __INITIAL_MXCSR_MASK__ 0xFFBF #ifdef _KERNEL struct proc; struct trapframe; extern uint32_t npx_mxcsr_mask; extern uint64_t npx_xcr0_mask; void npxprobemask (void); void npxexit (void); void npxinit (void); void npxsave (union savefpu *addr); void fpusave (union savefpu *addr, uint64_t mask); void fpurstor (union savefpu *addr, uint64_t mask); #endif #endif /* !_CPU_NPX_H_ */
