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freebsd-dev/sys/powerpc/fpu/fpu_instr.h

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Add a floating-point emulator so that a single userland or single ABI can run on processors that don't have a FPU. This is typically the case for Book E processors. While a tuned system will probably want to use soft-float (or use a processor that has a FPU if the usage is FP intensive enough), allowing hard-float on FPU-less systems gives great portability and flexibility. Obtained from: NetBSD
2008-02-23 20:05:26 +00:00
/* $NetBSD: instr.h,v 1.4 2005/12/11 12:18:43 christos Exp $ */
/* $FreeBSD$ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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.
*
* @(#)instr.h 8.1 (Berkeley) 6/11/93
*/
/*
* An instruction.
*/
union instr {
int i_int; /* as a whole */
/*
* Any instruction type.
*/
struct {
u_int i_opcd:6; /* first-level decode */
u_int :25;
u_int i_rc:1;
} i_any;
/*
* Format A
*/
struct {
u_int i_opcd:6;
u_int i_frt:5;
u_int i_fra:5;
u_int i_frb:5;
u_int i_frc:5;
u_int i_xo:5;
u_int i_rc:1;
} i_a;
/*
* Format B
*/
struct {
u_int i_opcd:6;
int i_bo:5;
int i_bi:5;
int i_bd:14;
int i_aa:1;
int i_lk:1;
} i_b;
/*
* Format D
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
int i_d:16;
} i_d;
/*
* Format DE
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
int i_d:12;
u_int i_xo:4;
} i_de;
/*
* Format I
*/
struct {
u_int i_opcd:6;
int i_li:24;
int i_aa:1;
int i_lk:1;
} i_i;
/*
* Format M
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
u_int i_rb:5;
int i_mb:5;
int i_me:5;
u_int i_rc:1;
} i_m;
/*
* Format MD
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
u_int i_rb:5;
int i_sh1_5:5;
int i_mb:6;
u_int i_xo:3;
int i_sh0:2;
u_int i_rc:1;
} i_md;
/*
* Format MDS
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
u_int i_rb:5;
int i_sh:5;
int i_mb:6;
u_int i_xo:4;
u_int i_rc:1;
} i_mds;
/*
* Format S
*/
struct {
u_int i_opcd:6;
int :24;
int i_i:1;
int :1;
} i_s;
/*
* Format X
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
u_int i_rb:5;
u_int i_xo:10;
u_int i_rc:1;
} i_x;
/*
* Format XFL
*/
struct {
u_int i_opcd:6;
int :1;
int i_flm:8;
int :1;
int i_frb:5;
u_int i_xo:10;
int :1;
} i_xfl;
/*
* Format XFX
*/
struct {
u_int i_opcd:6;
int i_dcrn:10;
u_int i_xo:10;
int :1;
} i_xfx;
/*
* Format XL
*/
struct {
u_int i_opcd:6;
int i_bt:5;
int i_ba:5;
int i_bb:5;
u_int i_xo:10;
int i_lk:1;
} i_xl;
/*
* Format XS
*/
struct {
u_int i_opcd:6;
u_int i_rs:5;
u_int i_ra:5;
int i_sh0_4:5;
u_int i_xo:9;
int i_sh5:1;
u_int i_rc:1;
} i_xs;
};
#define i_rt i_rs
/*
* Primary opcode numbers:
*/
#define OPC_TDI 0x02
#define OPC_TWI 0x03
#define OPC_MULLI 0x07
#define OPC_SUBFIC 0x08
#define OPC_BCE 0x09
#define OPC_CMPLI 0x0a
#define OPC_CMPI 0x0b
#define OPC_ADDIC 0x0c
#define OPC_ADDIC_DOT 0x0d
#define OPC_ADDI 0x0e
#define OPC_ADDIS 0x0f
#define OPC_BC 0x10
#define OPC_SC 0x11
#define OPC_B 0x12
#define OPC_branch_19 0x13
#define OPC_RLWIMI 0x14
#define OPC_RLWINM 0x15
#define OPC_BE 0x16
#define OPC_RLWNM 0x17
#define OPC_ORI 0x18
#define OPC_ORIS 0x19
#define OPC_XORI 0x1a
#define OPC_XORIS 0x1b
#define OPC_ANDI 0x1c
#define OPC_ANDIS 0x1d
#define OPC_dwe_rot_30 0x1e
#define OPC_integer_31 0x1f
#define OPC_LWZ 0x20
#define OPC_LWZU 0x21
#define OPC_LBZ 0x22
#define OPC_LBZU 0x23
#define OPC_STW 0x24
#define OPC_STWU 0x25
#define OPC_STB 0x26
#define OPC_STBU 0x27
#define OPC_LHZ 0x28
#define OPC_LHZU 0x29
#define OPC_LHA 0x2a
#define OPC_LHAU 0x2b
#define OPC_STH 0x2c
#define OPC_STHU 0x2d
#define OPC_LMW 0x2e
#define OPC_STMW 0x2f
#define OPC_LFS 0x30
#define OPC_LFSU 0x31
#define OPC_LFD 0x32
#define OPC_LFDU 0x33
#define OPC_STFS 0x34
#define OPC_STFSU 0x35
#define OPC_STFD 0x36
#define OPC_STFDU 0x37
#define OPC_load_st_58 0x3a
#define OPC_sp_fp_59 0x3b
#define OPC_load_st_62 0x3e
#define OPC_dp_fp_63 0x3f
/*
* Opcode 31 sub-types (FP only)
*/
#define OPC31_TW 0x004
#define OPC31_LFSX 0x217
#define OPC31_LFSUX 0x237
#define OPC31_LFDX 0x257
#define OPC31_LFDUX 0x277
#define OPC31_STFSX 0x297
#define OPC31_STFSUX 0x2b7
#define OPC31_STFDX 0x2d7
#define OPC31_STFDUX 0x2f7
#define OPC31_STFIWX 0x3d7
/* Mask for all valid indexed FP load/store ops (except stfiwx) */
#define OPC31_FPMASK 0x31f
#define OPC31_FPOP 0x217
/*
* Opcode 59 sub-types:
*/
#define OPC59_FDIVS 0x12
#define OPC59_FSUBS 0x14
#define OPC59_FADDS 0x15
#define OPC59_FSQRTS 0x16
#define OPC59_FRES 0x18
#define OPC59_FMULS 0x19
#define OPC59_FMSUBS 0x1c
#define OPC59_FMADDS 0x1d
#define OPC59_FNMSUBS 0x1e
#define OPC59_FNMADDS 0x1f
/*
* Opcode 62 sub-types:
*/
#define OPC62_LDE 0x0
#define OPC62_LDEU 0x1
#define OPC62_LFSE 0x4
#define OPC62_LFSEU 0x5
#define OPC62_LFDE 0x6
#define OPC62_LFDEU 0x7
#define OPC62_STDE 0x8
#define OPC62_STDEU 0x9
#define OPC62_STFSE 0xc
#define OPC62_STFSEU 0xd
#define OPC62_STFDE 0xe
#define OPC62_STFDEU 0xf
/*
* Opcode 63 sub-types:
*
* (The first group are masks....)
*/
#define OPC63M_MASK 0x10
#define OPC63M_FDIV 0x12
#define OPC63M_FSUB 0x14
#define OPC63M_FADD 0x15
#define OPC63M_FSQRT 0x16
#define OPC63M_FSEL 0x17
#define OPC63M_FMUL 0x19
#define OPC63M_FRSQRTE 0x1a
#define OPC63M_FMSUB 0x1c
#define OPC63M_FMADD 0x1d
#define OPC63M_FNMSUB 0x1e
#define OPC63M_FNMADD 0x1f
#define OPC63_FCMPU 0x00
#define OPC63_FRSP 0x0c
#define OPC63_FCTIW 0x0e
#define OPC63_FCTIWZ 0x0f
#define OPC63_FCMPO 0x20
#define OPC63_MTFSB1 0x26
#define OPC63_FNEG 0x28
#define OPC63_MCRFS 0x40
#define OPC63_MTFSB0 0x46
#define OPC63_FMR 0x48
#define OPC63_MTFSFI 0x86
#define OPC63_FNABS 0x88
#define OPC63_FABS 0x108
#define OPC63_MFFS 0x247
#define OPC63_MTFSF 0x2c7
#define OPC63_FCTID 0x32e
#define OPC63_FCTIDZ 0x32f
#define OPC63_FCFID 0x34e
/*
* FPU data types.
*/
#define FTYPE_LNG -1 /* data = 64-bit signed long integer */
#define FTYPE_INT 0 /* data = 32-bit signed integer */
#define FTYPE_SNG 1 /* data = 32-bit float */
#define FTYPE_DBL 2 /* data = 64-bit double */
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