1290001Sglebius/*- 2290001Sglebius * Copyright (c) 1990 The Regents of the University of California. 3290001Sglebius * All rights reserved. 4290001Sglebius * 5290001Sglebius * This code is derived from software contributed to Berkeley by 6290001Sglebius * William Jolitz. 7290001Sglebius * 8290001Sglebius * Redistribution and use in source and binary forms, with or without 9290001Sglebius * modification, are permitted provided that the following conditions 10290001Sglebius * are met: 11290001Sglebius * 1. Redistributions of source code must retain the above copyright 12290001Sglebius * notice, this list of conditions and the following disclaimer. 13290001Sglebius * 2. Redistributions in binary form must reproduce the above copyright 14290001Sglebius * notice, this list of conditions and the following disclaimer in the 15290001Sglebius * documentation and/or other materials provided with the distribution. 16290001Sglebius * 4. Neither the name of the University nor the names of its contributors 17290001Sglebius * may be used to endorse or promote products derived from this software 18290001Sglebius * without specific prior written permission. 19290001Sglebius * 20290001Sglebius * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21290001Sglebius * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22290001Sglebius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23290001Sglebius * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24290001Sglebius * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25290001Sglebius * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26290001Sglebius * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27290001Sglebius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28290001Sglebius * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29290001Sglebius * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30290001Sglebius * SUCH DAMAGE. 31290001Sglebius * 32290001Sglebius * from: @(#)npx.h 5.3 (Berkeley) 1/18/91 33290001Sglebius * $FreeBSD$ 34290001Sglebius */ 35290001Sglebius 36290001Sglebius/* 37290001Sglebius * Floating Point Data Structures and Constants 38290001Sglebius * W. Jolitz 1/90 39290001Sglebius */ 40290001Sglebius 41290001Sglebius#ifndef _X86_FPU_H_ 42290001Sglebius#define _X86_FPU_H_ 43290001Sglebius 44290001Sglebius/* Environment information of floating point unit. */ 45290001Sglebiusstruct env87 { 46290001Sglebius int32_t en_cw; /* control word (16bits) */ 47290001Sglebius int32_t en_sw; /* status word (16bits) */ 48290001Sglebius int32_t en_tw; /* tag word (16bits) */ 49290001Sglebius int32_t en_fip; /* fp instruction pointer */ 50290001Sglebius uint16_t en_fcs; /* fp code segment selector */ 51290001Sglebius uint16_t en_opcode; /* opcode last executed (11 bits) */ 52290001Sglebius int32_t en_foo; /* fp operand offset */ 53290001Sglebius int32_t en_fos; /* fp operand segment selector */ 54290001Sglebius}; 55290001Sglebius 56290001Sglebius/* Contents of each x87 floating point accumulator. */ 57290001Sglebiusstruct fpacc87 { 58290001Sglebius uint8_t fp_bytes[10]; 59290001Sglebius}; 60290001Sglebius 61290001Sglebius/* Floating point context. (i386 fnsave/frstor) */ 62290001Sglebiusstruct save87 { 63290001Sglebius struct env87 sv_env; /* floating point control/status */ 64290001Sglebius struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */ 65290001Sglebius uint8_t sv_pad0[4]; /* saved status word (now unused) */ 66290001Sglebius uint8_t sv_pad[64]; 67290001Sglebius}; 68290001Sglebius 69290001Sglebius/* Contents of each SSE extended accumulator. */ 70290001Sglebiusstruct xmmacc { 71290001Sglebius uint8_t xmm_bytes[16]; 72290001Sglebius}; 73290001Sglebius 74290001Sglebius/* Contents of the upper 16 bytes of each AVX extended accumulator. */ 75290001Sglebiusstruct ymmacc { 76290001Sglebius uint8_t ymm_bytes[16]; 77290001Sglebius}; 78290001Sglebius 79290001Sglebius/* Rename structs below depending on machine architecture. */ 80290001Sglebius#ifdef __i386__ 81290001Sglebius#define __envxmm32 envxmm 82290001Sglebius#else 83290001Sglebius#define __envxmm32 envxmm32 84290001Sglebius#define __envxmm64 envxmm 85290001Sglebius#endif 86290001Sglebius 87290001Sglebiusstruct __envxmm32 { 88290001Sglebius uint16_t en_cw; /* control word (16bits) */ 89290001Sglebius uint16_t en_sw; /* status word (16bits) */ 90290001Sglebius uint16_t en_tw; /* tag word (16bits) */ 91290001Sglebius uint16_t en_opcode; /* opcode last executed (11 bits) */ 92290001Sglebius uint32_t en_fip; /* fp instruction pointer */ 93290001Sglebius uint16_t en_fcs; /* fp code segment selector */ 94290001Sglebius uint16_t en_pad0; /* padding */ 95290001Sglebius uint32_t en_foo; /* fp operand offset */ 96290001Sglebius uint16_t en_fos; /* fp operand segment selector */ 97290001Sglebius uint16_t en_pad1; /* padding */ 98290001Sglebius uint32_t en_mxcsr; /* SSE control/status register */ 99290001Sglebius uint32_t en_mxcsr_mask; /* valid bits in mxcsr */ 100290001Sglebius}; 101290001Sglebius 102290001Sglebiusstruct __envxmm64 { 103290001Sglebius uint16_t en_cw; /* control word (16bits) */ 104290001Sglebius uint16_t en_sw; /* status word (16bits) */ 105290001Sglebius uint8_t en_tw; /* tag word (8bits) */ 106290001Sglebius uint8_t en_zero; 107290001Sglebius uint16_t en_opcode; /* opcode last executed (11 bits ) */ 108290001Sglebius uint64_t en_rip; /* fp instruction pointer */ 109290001Sglebius uint64_t en_rdp; /* fp operand pointer */ 110290001Sglebius uint32_t en_mxcsr; /* SSE control/status register */ 111290001Sglebius uint32_t en_mxcsr_mask; /* valid bits in mxcsr */ 112290001Sglebius}; 113290001Sglebius 114290001Sglebius/* Floating point context. (i386 fxsave/fxrstor) */ 115290001Sglebiusstruct savexmm { 116290001Sglebius struct __envxmm32 sv_env; 117290001Sglebius struct { 118290001Sglebius struct fpacc87 fp_acc; 119290001Sglebius uint8_t fp_pad[6]; /* padding */ 120290001Sglebius } sv_fp[8]; 121290001Sglebius struct xmmacc sv_xmm[8]; 122290001Sglebius uint8_t sv_pad[224]; 123290001Sglebius} __aligned(16); 124290001Sglebius 125290001Sglebius#ifdef __i386__ 126290001Sglebiusunion savefpu { 127290001Sglebius struct save87 sv_87; 128290001Sglebius struct savexmm sv_xmm; 129290001Sglebius}; 130290001Sglebius#else 131290001Sglebius/* Floating point context. (amd64 fxsave/fxrstor) */ 132290001Sglebiusstruct savefpu { 133290001Sglebius struct __envxmm64 sv_env; 134290001Sglebius struct { 135290001Sglebius struct fpacc87 fp_acc; 136290001Sglebius uint8_t fp_pad[6]; /* padding */ 137290001Sglebius } sv_fp[8]; 138290001Sglebius struct xmmacc sv_xmm[16]; 139290001Sglebius uint8_t sv_pad[96]; 140290001Sglebius} __aligned(16); 141290001Sglebius#endif 142290001Sglebius 143290001Sglebiusstruct xstate_hdr { 144290001Sglebius uint64_t xstate_bv; 145290001Sglebius uint64_t xstate_xcomp_bv; 146290001Sglebius uint8_t xstate_rsrv0[8]; 147290001Sglebius uint8_t xstate_rsrv[40]; 148290001Sglebius}; 149290001Sglebius#define XSTATE_XCOMP_BV_COMPACT (1ULL << 63) 150290001Sglebius 151290001Sglebiusstruct savexmm_xstate { 152290001Sglebius struct xstate_hdr sx_hd; 153290001Sglebius struct ymmacc sx_ymm[16]; 154290001Sglebius}; 155290001Sglebius 156290001Sglebiusstruct savexmm_ymm { 157290001Sglebius struct __envxmm32 sv_env; 158290001Sglebius struct { 159290001Sglebius struct fpacc87 fp_acc; 160290001Sglebius int8_t fp_pad[6]; /* padding */ 161290001Sglebius } sv_fp[8]; 162290001Sglebius struct xmmacc sv_xmm[16]; 163290001Sglebius uint8_t sv_pad[96]; 164290001Sglebius struct savexmm_xstate sv_xstate; 165290001Sglebius} __aligned(64); 166290001Sglebius 167290001Sglebiusstruct savefpu_xstate { 168290001Sglebius struct xstate_hdr sx_hd; 169290001Sglebius struct ymmacc sx_ymm[16]; 170290001Sglebius}; 171290001Sglebius 172290001Sglebiusstruct savefpu_ymm { 173290001Sglebius struct __envxmm64 sv_env; 174290001Sglebius struct { 175290001Sglebius struct fpacc87 fp_acc; 176290001Sglebius int8_t fp_pad[6]; /* padding */ 177290001Sglebius } sv_fp[8]; 178290001Sglebius struct xmmacc sv_xmm[16]; 179290001Sglebius uint8_t sv_pad[96]; 180290001Sglebius struct savefpu_xstate sv_xstate; 181290001Sglebius} __aligned(64); 182290001Sglebius 183290001Sglebius#undef __envxmm32 184290001Sglebius#undef __envxmm64 185290001Sglebius 186290001Sglebius/* 187290001Sglebius * The hardware default control word for i387's and later coprocessors is 188290001Sglebius * 0x37F, giving: 189290001Sglebius * 190290001Sglebius * round to nearest 191290001Sglebius * 64-bit precision 192290001Sglebius * all exceptions masked. 193290001Sglebius * 194290001Sglebius * FreeBSD/i386 uses 53 bit precision for things like fadd/fsub/fsqrt etc 195290001Sglebius * because of the difference between memory and fpu register stack arguments. 196290001Sglebius * If its using an intermediate fpu register, it has 80/64 bits to work 197290001Sglebius * with. If it uses memory, it has 64/53 bits to work with. However, 198290001Sglebius * gcc is aware of this and goes to a fair bit of trouble to make the 199290001Sglebius * best use of it. 200290001Sglebius * 201290001Sglebius * This is mostly academic for AMD64, because the ABI prefers the use 202290001Sglebius * SSE2 based math. For FreeBSD/amd64, we go with the default settings. 203290001Sglebius */ 204290001Sglebius#define __INITIAL_FPUCW__ 0x037F 205290001Sglebius#define __INITIAL_FPUCW_I386__ 0x127F 206290001Sglebius#define __INITIAL_NPXCW__ __INITIAL_FPUCW_I386__ 207290001Sglebius#define __INITIAL_MXCSR__ 0x1F80 208290001Sglebius#define __INITIAL_MXCSR_MASK__ 0xFFBF 209290001Sglebius 210290001Sglebius/* 211290001Sglebius * The current value of %xcr0 is saved in the sv_pad[] field of the FPU 212290001Sglebius * state in the NT_X86_XSTATE note in core dumps. This offset is chosen 213290001Sglebius * to match the offset used by NT_X86_XSTATE in other systems. 214290001Sglebius */ 215290001Sglebius#define X86_XSTATE_XCR0_OFFSET 464 216290001Sglebius 217290001Sglebius#endif /* !_X86_FPU_H_ */ 218290001Sglebius