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freebsd-dev/sys/alpha/include/inst.h
dfr 461be5968e Implement 'software completion' for floating point arithmetic. On the 
alpha, operations involving non-finite numbers or denormalised numbers
or operations which should generate such numbers will cause an arithmetic
exception.  For programs which follow some strict code generation rules,
the kernel trap handler can then 'complete' the operation by emulating
the faulting instruction.

To use software completion, a program must be compiled with the arguments
'-mtrap-precision=i' and '-mfp-trap-mode=su' or '-mfp-trap-mode=sui'.
Programs compiled in this way can use non-finite and denormalised numbers
at the expense of slightly less efficient code generation of floating
point instructions.  Programs not compiled with these options will receive
a SIGFPE signal when non-finite or denormalised numbers are used or
generated.

Reviewed by: John Polstra <jdp@polstra.com>
1998-12-04 10:52:48 +00:00

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/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id$
*/
#ifndef _MACHINE_INST_H_
#define _MACHINE_INST_H_
union alpha_instruction {
u_int32_t word;
struct {
u_int32_t argument : 26;
u_int32_t opcode : 6;
#define op_call_pal 0x00
#define op_lda 0x08
#define op_ldah 0x09
#define op_ldbu 0x0a
#define op_unop 0x0b
#define op_ldq_u 0x0b
#define op_ldwu 0x0c
#define op_stw 0x0d
#define op_stb 0x0e
#define op_stq_u 0x0f
#define op_inta 0x10
#define inta_addl 0x00
#define inta_s4addl 0x02
#define inta_subl 0x09
#define inta_s4subl 0x0b
#define inta_cmpbge 0x0f
#define inta_s8addl 0x12
#define inta_s8subl 0x1b
#define inta_cmpult 0x1d
#define inta_addq 0x20
#define inta_s4addq 0x22
#define inta_subq 0x29
#define inta_s4subq 0x2b
#define inta_cmpeq 0x2d
#define inta_s8addq 0x32
#define inta_s8subq 0x3b
#define inta_cmpule 0x3d
#define inta_addlv 0x40
#define inta_sublv 0x49
#define inta_cmplt 0x4d
#define inta_addqv 0x60
#define inta_subqv 0x69
#define inta_cmple 0x6d
#define op_intl 0x11
#define intl_and 0x00
#define intl_andnot 0x08
#define intl_bic 0x08
#define intl_cmovlbs 0x14
#define intl_cmovlbc 0x16
#define intl_or 0x20
#define intl_bis 0x20
#define intl_cmoveq 0x24
#define intl_cmovne 0x26
#define intl_ornot 0x28
#define intl_xor 0x40
#define intl_cmovlt 0x44
#define intl_cmovge 0x46
#define intl_eqv 0x48
#define intl_amask 0x61
#define intl_cmovle 0x64
#define intl_cmovgt 0x66
#define intl_implver 0x6c
#define op_ints 0x12
#define ints_mskbl 0x02
#define ints_extbl 0x06
#define ints_insbl 0x0b
#define ints_mskwl 0x12
#define ints_extwl 0x16
#define ints_inswl 0x1b
#define ints_mskll 0x22
#define ints_extll 0x26
#define ints_insll 0x2b
#define ints_zap 0x30
#define ints_zapnot 0x31
#define ints_mskql 0x32
#define ints_srl 0x34
#define ints_extql 0x36
#define ints_sll 0x39
#define ints_insql 0x3b
#define ints_sra 0x3c
#define ints_mskwh 0x52
#define ints_inswh 0x57
#define ints_extwh 0x5a
#define ints_msklh 0x62
#define ints_inslh 0x67
#define ints_extlh 0x6a
#define ints_mskqh 0x72
#define ints_insqh 0x77
#define ints_extqh 0x7a
#define op_intm 0x13
#define intm_mull 0x00
#define intm_mulq 0x20
#define intm_umulh 0x30
#define intm_mullv 0x40
#define intm_mulqv 0x60
#define op_opc14 0x14
#define op_fltv 0x15
#define op_flti 0x16
#define flti_addsc 0x000
#define flti_subsc 0x001
#define flti_mulsc 0x002
#define flti_divsc 0x003
#define flti_addtc 0x020
#define flti_subtc 0x021
#define flti_multc 0x022
#define flti_divtc 0x023
#define flti_cvttsc 0x02c
#define flti_cvttqc 0x02f
#define flti_cvtqsc 0x03c
#define flti_cvtqtc 0x03e
#define flti_addsm 0x040
#define flti_subsm 0x041
#define flti_mulsm 0x042
#define flti_divsm 0x043
#define flti_addtm 0x060
#define flti_subtm 0x061
#define flti_multm 0x062
#define flti_divtm 0x063
#define flti_cvttsm 0x06c
#define flti_cvttqm 0x06f
#define flti_cvtqsm 0x07c
#define flti_cvtqtm 0x07e
#define flti_adds 0x080
#define flti_subs 0x081
#define flti_muls 0x082
#define flti_divs 0x083
#define flti_addt 0x0a0
#define flti_subt 0x0a1
#define flti_mult 0x0a2
#define flti_divt 0x0a3
#define flti_cmptun 0x0a4
#define flti_cmpteq 0x0a5
#define flti_cmptlt 0x0a6
#define flti_cmptle 0x0a7
#define flti_cvtts 0x0ac
#define flti_cvttq 0x0af
#define flti_cvtqs 0x0bc
#define flti_cvtqt 0x0be
#define flti_addsd 0x0c0
#define flti_subsd 0x0c1
#define flti_mulsd 0x0c2
#define flti_divsd 0x0c3
#define flti_addtd 0x0e0
#define flti_subtd 0x0e1
#define flti_multd 0x0e2
#define flti_divtd 0x0e3
#define flti_cvttsd 0x0ec
#define flti_cvttqd 0x0ef
#define flti_cvtqsd 0x0fc
#define flti_cvtqtd 0x0fe
#define flti_addsuc 0x100
#define flti_subsuc 0x101
#define flti_mulsuc 0x102
#define flti_divsuc 0x103
#define flti_addtuc 0x120
#define flti_subtuc 0x121
#define flti_multuc 0x122
#define flti_divtuc 0x123
#define flti_cvttsuc 0x12c
#define flti_cvttqvc 0x12f
#define flti_addsum 0x140
#define flti_subsum 0x141
#define flti_mulsum 0x142
#define flti_divsum 0x143
#define flti_addtum 0x160
#define flti_subtum 0x161
#define flti_multum 0x162
#define flti_divtum 0x163
#define flti_cvttsum 0x16c
#define flti_cvttqvm 0x16f
#define flti_addsu 0x180
#define flti_subsu 0x181
#define flti_mulsu 0x182
#define flti_divsu 0x183
#define flti_addtu 0x1a0
#define flti_subtu 0x1a1
#define flti_multu 0x1a2
#define flti_divtu 0x1a3
#define flti_cvttsu 0x1ac
#define flti_cvttqv 0x1af
#define flti_addsud 0x1c0
#define flti_subsud 0x1c1
#define flti_mulsud 0x1c2
#define flti_divsud 0x1c3
#define flti_addtud 0x1e0
#define flti_subtud 0x1e1
#define flti_multud 0x1e2
#define flti_divtud 0x1e3
#define flti_cvttsud 0x1ec
#define flti_cvttqvd 0x1ef
#define flti_cvtst 0x2ac
#define flti_addssuc 0x500
#define flti_subssuc 0x501
#define flti_mulssuc 0x502
#define flti_divssuc 0x503
#define flti_addtsuc 0x520
#define flti_subtsuc 0x521
#define flti_multsuc 0x522
#define flti_divtsuc 0x523
#define flti_cvttssuc 0x52c
#define flti_cvttqsvc 0x52f
#define flti_addssum 0x540
#define flti_subssum 0x541
#define flti_mulssum 0x542
#define flti_divssum 0x543
#define flti_addtsum 0x560
#define flti_subtsum 0x561
#define flti_multsum 0x562
#define flti_divtsum 0x563
#define flti_cvttssum 0x56c
#define flti_cvttqsvm 0x56f
#define flti_addssu 0x580
#define flti_subssu 0x581
#define flti_mulssu 0x582
#define flti_divssu 0x583
#define flti_addtsu 0x5a0
#define flti_subtsu 0x5a1
#define flti_multsu 0x5a2
#define flti_divtsu 0x5a3
#define flti_cmptunsu 0x5a4
#define flti_cmpteqsu 0x5a5
#define flti_cmptltsu 0x5a6
#define flti_cmptlesu 0x5a7
#define flti_cvttssu 0x5ac
#define flti_cvttqsv 0x5af
#define flti_addssud 0x5c0
#define flti_subssud 0x5c1
#define flti_mulssud 0x5c2
#define flti_divssud 0x5c3
#define flti_addtsud 0x5e0
#define flti_subtsud 0x5e1
#define flti_multsud 0x5e2
#define flti_divtsud 0x5e3
#define flti_cvttssud 0x5ec
#define flti_cvttqsvd 0x5ef
#define flti_cvtsts 0x6ac
#define flti_addssuic 0x700
#define flti_subssuic 0x701
#define flti_mulssuic 0x702
#define flti_divssuic 0x703
#define flti_addtsuic 0x720
#define flti_subtsuic 0x721
#define flti_multsuic 0x722
#define flti_divtsuic 0x723
#define flti_cvttssuic 0x72c
#define flti_cvttqsvic 0x72f
#define flti_cvtqssuic 0x73c
#define flti_cvtqtsuic 0x73e
#define flti_addssuim 0x740
#define flti_subssuim 0x741
#define flti_mulssuim 0x742
#define flti_divssuim 0x743
#define flti_addtsuim 0x760
#define flti_subtsuim 0x761
#define flti_multsuim 0x762
#define flti_divtsuim 0x763
#define flti_cvttssuim 0x76c
#define flti_cvttqsvim 0x76f
#define flti_cvtqssuim 0x77c
#define flti_cvtqtsuim 0x77e
#define flti_addssui 0x780
#define flti_subssui 0x781
#define flti_mulssui 0x782
#define flti_divssui 0x783
#define flti_addtsui 0x7a0
#define flti_subtsui 0x7a1
#define flti_multsui 0x7a2
#define flti_divtsui 0x7a3
#define flti_cmptunsui 0x7a4
#define flti_cmpteqsui 0x7a5
#define flti_cmptltsui 0x7a6
#define flti_cmptlesui 0x7a7
#define flti_cvttssui 0x7ac
#define flti_cvttqsvi 0x7af
#define flti_cvtqssui 0x7bc
#define flti_cvtqtsui 0x7bc
#define flti_addssuid 0x7c0
#define flti_subssuid 0x7c1
#define flti_mulssuid 0x7c2
#define flti_divssuid 0x7c3
#define flti_addtsuid 0x7e0
#define flti_subtsuid 0x7e1
#define flti_multsuid 0x7e2
#define flti_divtsuid 0x7e3
#define flti_cvttssuid 0x7ec
#define flti_cvttqsvid 0x7ef
#define flti_cvtqssuid 0x7fc
#define flti_cvtqtsuid 0x7fc
#define op_fltl 0x17
#define fltl_cvtlq 0x010
#define fltl_cpys 0x020
#define fltl_cpysn 0x021
#define fltl_cpyse 0x022
#define fltl_mt_fpcr 0x024
#define fltl_mf_fpcr 0x025
#define fltl_fcmoveq 0x02a
#define fltl_fcmovne 0x02b
#define fltl_fcmovlt 0x02c
#define fltl_fcmovge 0x02d
#define fltl_fcmovle 0x02e
#define fltl_fcmovgt 0x02f
#define fltl_cvtql 0x030
#define fltl_cvtqlv 0x130
#define fltl_cvtqlsv 0x530
#define op_misc 0x18
#define misc_trapb 0x0000
#define misc_excb 0x0400
#define misc_mb 0x4000
#define misc_wmb 0x4400
#define misc_fetch 0x8000
#define misc_fetch_m 0xa000
#define misc_rpcc 0xc000
#define misc_rc 0xe000
#define misc_ecb 0xe800
#define misc_rs 0xf000
#define misc_wh64 0xf800
#define op_pal19 0x19
#define op_jsr 0x1a
#define op_pal1b 0x1b
#define op_pal1c 0x1c
#define op_pal1d 0x1d
#define op_pal1e 0x1e
#define op_pal1f 0x1f
#define op_ldf 0x20
#define op_ldg 0x21
#define op_lds 0x22
#define op_ldt 0x23
#define op_stf 0x24
#define op_stg 0x25
#define op_sts 0x26
#define op_stt 0x27
#define op_ldl 0x28
#define op_ldq 0x29
#define op_ldl_l 0x2a
#define op_ldq_l 0x2b
#define op_stl 0x2c
#define op_stq 0x2d
#define op_stl_c 0x2e
#define op_stq_c 0x2f
#define op_br 0x30
#define op_fbeq 0x31
#define op_fblt 0x32
#define op_fble 0x33
#define op_bsr 0x34
#define op_fbne 0x35
#define op_fbge 0x36
#define op_fbgt 0x37
#define op_blbc 0x38
#define op_beq 0x39
#define op_blt 0x3a
#define op_ble 0x3b
#define op_blbs 0x3c
#define op_bne 0x3d
#define op_bge 0x3e
#define op_bgt 0x3f
} common;
struct {
u_int32_t function : 16;
u_int32_t rb : 5;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} memory_format;
struct {
u_int32_t hint : 14;
u_int32_t function : 2;
#define jsr_jmp 0
#define jsr_jsr 1
#define jsr_ret 2
#define jsr_jsr_coroutine 3
u_int32_t rb : 5;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} j_format;
struct {
int32_t memory_displacement : 16;
u_int32_t rb : 5;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} m_format;
struct {
u_int32_t rc : 5;
u_int32_t function : 7;
u_int32_t form : 1;
u_int32_t sbz : 3;
u_int32_t rb : 5;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} o_format;
struct {
u_int32_t rc : 5;
u_int32_t function : 7;
u_int32_t form : 1;
u_int32_t literal : 8;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} l_format;
struct {
u_int32_t fc : 5;
u_int32_t function : 11;
u_int32_t fb : 5;
u_int32_t fa : 5;
u_int32_t opcode : 6;
} f_format;
struct {
u_int32_t function : 26;
u_int32_t opcode : 6;
} pal_format;
struct {
int32_t branch_displacement : 21;
u_int32_t ra : 5;
u_int32_t opcode : 6;
} b_format;
};
#endif /* _MACHINE_INST_H_ */
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