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[freewnn:00194] Re: FreeWnn-1.1.1-a012がタイムアウトします

To: freewnn@tomo.tomo.gr.jp
Subject: [freewnn:00194] Re: FreeWnn-1.1.1-a012がタイムアウトします
From: Katsuomi Hamajima/濱嶋克臣<hamajima@XXXX>
Date: Thu, 14 Oct 1999 18:00:06 +0900 (JST)
In-Reply-To: Your message of "Wed, 13 Oct 1999 22:51:50 +0900 (JST)"<19991013225150A.hamajima@nagoya.ydc.co.jp>
References: <19991013225150A.hamajima@nagoya.ydc.co.jp>
Reply-To: freewnn@tomo.gr.jp

濱嶋＠ＹＤＣです

IA-32知っている人、教えてください

> 一度カウンタを入れてみましたが、8回目で落ちたので何らかの条件がそろわな
> いと発生しないようです。[freewnn:00185]で片山＠ＰＦＵさんが書かれたサン
> プルでは、何か条件が足らないようです(サンプルは2.2.8でも問題なく動きまし

do_hindo_s.cのRAND()を使っているところにbreak pointを仕掛けてfloating
registerを表示してみました

表示されるデータの一行目最後にある "top" が減っています。たしか8087系は
registerをstackのようにして使うと本で読んだことがありますが、これが直接
的な原因なのでしょうか?

＃ registerが8本で、8回目に落ちる。うーん、すじつまはあっているように思
＃ える

にしくさんのところのOpenBSD/i386では起らないようなので、これが原因なら
drand48()でなくFreeBSDのfloating registerの扱い方がおかしいということに
なります


Breakpoint 3, hindo_set (dic_no=0, entry=13600, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb) info float
status 0x3920: exceptions: LOS; flags: 0001; top 7
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(0) => valid 3ffc8ceefecd44040000  0.13763
%st(7)    empty 3ffcccccccccccccd000  0.2
%st(6)    empty 403ce8cc8dd1d8e9d1c0  4.19373e+18
%st(5)    empty 403d92bc7ac2e874dcf0  5.28673e+18
%st(4)    empty 403dbc7ad8c474e6da74  6.7907e+18
%st(3)    empty 403ce93578f5c98ce91c  4.20112e+18
%st(2)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(1)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=0, entry=7336, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb)info float
status 0x3120: exceptions: LOS; flags: 0001; top 6
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(1)    valid 3ffc8ceefecd44040000  0.13763
%st(0) => valid 3ffdfa7c8a18c6f00000  0.489231
%st(7)    empty 3ffcccccccccccccd000  0.2
%st(6)    empty 403d92bc7ac2e874dcf0  5.28673e+18
%st(5)    empty 403dbc7ad8c474e6da74  6.7907e+18
%st(4)    empty 403ce93578f5c98ce91c  4.20112e+18
%st(3)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(2)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=3, entry=2691, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb) info float
status 0x2920: exceptions: LOS; flags: 0001; top 5
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(2)    valid 3ffc8ceefecd44040000  0.13763
%st(1)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(0) => valid 3ffe9c924a442a230000  0.611607
%st(7)    empty 3ffd8000000000000000  0.25
%st(6)    empty 403dbc7ad8c474e6da74  6.7907e+18
%st(5)    empty 403ce93578f5c98ce91c  4.20112e+18
%st(4)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(3)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=0, entry=13600, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb)info float
status 0x2120: exceptions: LOS; flags: 0001; top 4
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(3)    valid 3ffc8ceefecd44040000  0.13763
%st(2)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(1)    valid 3ffe9c924a442a230000  0.611607
%st(0) => valid 3ffdfe261e4ac5e40000  0.496385
%st(7)    empty 3ffcccccccccccccd000  0.2
%st(6)    empty 403ce93578f5c98ce91c  4.20112e+18
%st(5)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(4)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) info float
status 0x2120: exceptions: LOS; flags: 0001; top 4
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(3)    valid 3ffc8ceefecd44040000  0.13763
%st(2)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(1)    valid 3ffe9c924a442a230000  0.611607
%st(0) => valid 3ffdfe261e4ac5e40000  0.496385
%st(7)    empty 3ffcccccccccccccd000  0.2
%st(6)    empty 403ce93578f5c98ce91c  4.20112e+18
%st(5)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(4)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=0, entry=7336, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb) info float
status 0x1920: exceptions: LOS; flags: 0001; top 3
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(4)    valid 3ffc8ceefecd44040000  0.13763
%st(3)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(2)    valid 3ffe9c924a442a230000  0.611607
%st(1)    valid 3ffdfe261e4ac5e40000  0.496385
%st(0) => valid 3ffe8bb81ce88d150000  0.545778
%st(7)    empty 3ffcccccccccccccd000  0.2
%st(6)    empty 403ce8e08dd1a4e9bd94  4.19514e+18
%st(5)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=3, entry=2691, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb) info float
status 0x1120: exceptions: LOS; flags: 0001; top 2
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(5)    valid 3ffc8ceefecd44040000  0.13763
%st(4)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(3)    valid 3ffe9c924a442a230000  0.611607
%st(2)    valid 3ffdfe261e4ac5e40000  0.496385
%st(1)    valid 3ffe8bb81ce88d150000  0.545778
%st(0) => valid 3ffef9808320effc0000  0.974617
%st(7)    empty 3ffd8000000000000000  0.25
%st(6)    empty 403d8ab87a82a474e8ea  4.99794e+18
(gdb) c
Continuing.

Breakpoint 3, hindo_set (dic_no=0, entry=13600, imaop=-3, hinop=-3)
    at do_hindo_s.c:178
(gdb) info float
status 0x920: exceptions: LOS; flags: 0001; top 1
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x21c; pc 0x1f:0x12269; operand 0x27:0xefbfd7d8
 regno     tag  msb              lsb  value
%st(6)    valid 3ffc8ceefecd44040000  0.13763
%st(5)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(4)    valid 3ffe9c924a442a230000  0.611607
%st(3)    valid 3ffdfe261e4ac5e40000  0.496385
%st(2)    valid 3ffe8bb81ce88d150000  0.545778
%st(1)    valid 3ffef9808320effc0000  0.974617
%st(0) => valid 3ffed3ed30f296570000  0.827838
%st(7)    empty 3ffcccccccccccccd000  0.2
(gdb) c
Continuing.

Program received signal SIGFPE, Arithmetic exception.
0x2007599d in ldexp ()
(gdb) info float
u: status 0x83e1: exceptions: INVALID LOS FPSTACK; flags: 0011; top 0
e: status 0x300: flags: 0011; top 0
control 0x1272: compute to 53 bits; round NEAREST; mask: DENORM UNDERF LOS;
last instruction: opcode 0x545; pc 0x1f:0x2007599a; operand 0x27:0xefbfd79c
 regno     tag  msb              lsb  value
%st(7)    valid 3ffc8ceefecd44040000  0.13763
%st(6)    valid 3ffdfa7c8a18c6f00000  0.489231
%st(5)    valid 3ffe9c924a442a230000  0.611607
%st(4)    valid 3ffdfe261e4ac5e40000  0.496385
%st(3)    valid 3ffe8bb81ce88d150000  0.545778
%st(2)    valid 3ffef9808320effc0000  0.974617
%st(1)    valid 3ffed3ed30f296570000  0.827838
%st(0) => valid c004c000000000000000  -48
(gdb) disassemble
Dump of assembler code for function ldexp:
0x20075994 <ldexp>:	pushl  %ebp
0x20075995 <ldexp+1>:	movl   %esp,%ebp
0x20075997 <ldexp+3>:	fildl  0x10(%ebp)
0x2007599a <ldexp+6>:	fldl   0x8(%ebp)
0x2007599d <ldexp+9>:	fscale 
0x2007599f <ldexp+11>:	fstp   %st(1)
0x200759a1 <ldexp+13>:	leave  
0x200759a2 <ldexp+14>:	ret    
0x200759a3 <ldexp+15>:	addb   %al,(%eax)
0x200759a5 <ldexp+17>:	addb   %al,(%eax)
0x200759a7 <ldexp+19>:	addb   %al,(%eax)
0x200759a9 <ldexp+21>:	addb   %al,(%eax)
0x200759ab <ldexp+23>:	addb   %al,(%eax)
0x200759ad <ldexp+25>:	addb   %al,(%eax)
0x200759af <ldexp+27>:	addb   %dl,0xffffff89(%ebp)
End of assembler dump.

References:
- [freewnn:00192] Re: FreeWnn-1.1.1-a012がタイムアウトします
  - From: Katsuomi Hamajima/濱嶋克臣<hamajima@XXXX>

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