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Diffstat (limited to 'libm/i387/npx.h')
| -rw-r--r-- | libm/i387/npx.h | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/libm/i387/npx.h b/libm/i387/npx.h deleted file mode 100644 index 38c2add..0000000 --- a/libm/i387/npx.h +++ /dev/null @@ -1,160 +0,0 @@ -/*- - * 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: src/sys/i386/include/npx.h,v 1.29.2.1 2006/07/01 00:57:55 davidxu Exp $ - */ - -/* - * 287/387 NPX Coprocessor Data Structures and Constants - * W. Jolitz 1/90 - */ - -#ifndef _MACHINE_NPX_H_ -#define _MACHINE_NPX_H_ - -/* Environment information of floating point unit */ -struct env87 { - long en_cw; /* control word (16bits) */ - long en_sw; /* status word (16bits) */ - long en_tw; /* tag word (16bits) */ - long en_fip; /* floating point instruction pointer */ - u_short en_fcs; /* floating code segment selector */ - u_short en_opcode; /* opcode last executed (11 bits ) */ - long en_foo; /* floating operand offset */ - long en_fos; /* floating operand segment selector */ -}; - -/* Contents of each floating point accumulator */ -struct fpacc87 { -#ifdef dontdef /* too unportable */ - u_long fp_mantlo; /* mantissa low (31:0) */ - u_long fp_manthi; /* mantissa high (63:32) */ - int fp_exp:15; /* exponent */ - int fp_sgn:1; /* mantissa sign */ -#else - u_char fp_bytes[10]; -#endif -}; - -/* Floating point context */ -struct save87 { - struct env87 sv_env; /* floating point control/status */ - struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */ - u_char sv_pad0[4]; /* padding for (now unused) saved status word */ - /* - * 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). - */ - u_char sv_pad[64]; /* padding; used by emulators */ -}; - -struct envxmm { - u_int16_t en_cw; /* control word (16bits) */ - u_int16_t en_sw; /* status word (16bits) */ - u_int16_t en_tw; /* tag word (16bits) */ - u_int16_t en_opcode; /* opcode last executed (11 bits ) */ - u_int32_t en_fip; /* floating point instruction pointer */ - u_int16_t en_fcs; /* floating code segment selector */ - u_int16_t en_pad0; /* padding */ - u_int32_t en_foo; /* floating operand offset */ - u_int16_t en_fos; /* floating operand segment selector */ - u_int16_t en_pad1; /* padding */ - u_int32_t en_mxcsr; /* SSE sontorol/status register */ - u_int32_t en_mxcsr_mask; /* valid bits in mxcsr */ -}; - -/* Contents of each SSE extended accumulator */ -struct xmmacc { - u_char xmm_bytes[16]; -}; - -struct savexmm { - struct envxmm sv_env; - struct { - struct fpacc87 fp_acc; - u_char fp_pad[6]; /* padding */ - } sv_fp[8]; - struct xmmacc sv_xmm[8]; - u_char sv_pad[224]; -} __aligned(16); - -union savefpu { - struct save87 sv_87; - struct savexmm sv_xmm; -}; - -/* - * 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_MXCSR__ 0x1F80 - -#ifdef _KERNEL - -#define IO_NPX 0x0F0 /* Numeric Coprocessor */ -#define IO_NPXSIZE 16 /* 80387/80487 NPX registers */ - -#define IRQ_NPX 13 - -/* full reset on some systems, NOP on others */ -#define npx_full_reset() outb(IO_NPX + 1, 0) - -int npxdna(void); -void npxdrop(void); -void npxexit(struct thread *td); -int npxformat(void); -int npxgetregs(struct thread *td, union savefpu *addr); -void npxinit(u_short control); -void npxsave(union savefpu *addr); -void npxsetregs(struct thread *td, union savefpu *addr); -int npxtrap(void); -#endif - -#endif /* !_MACHINE_NPX_H_ */ |