e7d917e6eb
Remove extra "u" constraint that caused gcc 2.6.3 not to compile this file.
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Note that gcc 2.4.5, the compiler we are currently using, still compiles it
correctly after this change.
1995-02-17 06:01:47 +00:00
d04155c293
Optimize better.
1995-02-05 14:58:44 +00:00
b4bd7fea24
Replaced pops with adds.
1994-12-24 01:16:44 +00:00
26eccb0a9b
Exchange offsets of "saved signal mask" and "signal mask saved" so
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that the layout of sigjmp_bufs and jmp_bufs are the same (except
for the "signal mask saved" appended to the end).
1994-12-24 01:05:44 +00:00
fcc40a849d
If len == 0, then the result must be 0 regardless of the other arguments.
1994-11-24 16:36:35 +00:00
2db41a19e7
Use trap gate to enter kernel.
1994-10-26 19:49:42 +00:00
837f99d25c
Clean up deleted files.
1994-10-06 04:38:25 +00:00
345c8ef85c
Clean up deleted files.
1994-04-02 05:36:54 +00:00
da34d8a406
have cerror DTRT on returns, w.r.t. quads and -1. it needs to be done
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here (think of syscall(SYS_lseek,...)). also, kill bogus lseek thang.
1994-04-02 05:36:52 +00:00
b3086b2299
Need to set %edx to -1 before cerror, though perhaps we should have something
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more generic for this.
1994-03-31 18:38:57 +00:00
a3450ab6e8
Add a .text and .align to SYSCALL().
1994-03-31 18:31:23 +00:00
98cbb217ac
mem -> reg & reg->reg moves take the same time; so save a cycle by reading
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the block length from the stack instead of caching it in a register.
1994-03-22 01:15:47 +00:00
1f29a3d910
Smaller & Faster.
1994-03-16 17:40:23 +00:00
5ac78ccb34
[hn]to[nh][sl] functions used xchgb %h1,%b1 instead of the faster (on the
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i486 & i586) rorw $8, %w1.
1994-03-16 17:34:14 +00:00
915f7d4d3d
Use RCSID macro.
1994-03-12 01:48:26 +00:00
c95cd47ba2
Use RCSID macro for RCS ID's.
1994-03-12 01:39:55 +00:00
90ff28fef4
Style police. Use `je' and `jne' only on the result of an equality test;
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use `jz' and `jnz' in all other cases.
1994-02-14 20:05:52 +00:00
7f582f99d4
Fix spelling mistake: cashe -> cache.
1994-02-14 17:45:16 +00:00
01284ad877
Performance improvement from Bruce Evans.
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Removes one test instruction for each character.
1994-02-14 17:44:39 +00:00
f28455f783
Use "ror $8,%ax" instead of "xchg %al,%ah": equal on a i386, 1 cycle faster
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on a i486, and 2 cycles faster on a iPentium.
1994-02-14 17:43:19 +00:00
5cffad2151
Use movzbl, not movsbl, to zero extend for unsigned comparison.
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Fix from Bruce Evans.
1994-02-07 20:57:05 +00:00
e2c220f94b
Fix spelling error in Copyright notice
1994-01-28 20:34:33 +00:00
1fe07f186d
Separate curbrk and mincrk.
1994-01-27 15:08:03 +00:00
3463cb4eef
Trivial speedup inspired by SPARC code.
1994-01-27 15:00:49 +00:00
ef980f76fe
One last tweak.
1994-01-27 06:53:25 +00:00
22e614ce10
Random cleanup.
1994-01-27 06:34:59 +00:00
9c8862a970
Pedanticism.
1994-01-27 06:34:02 +00:00
3cf1bd9939
SYS_brk --> SYS_break. Where's my axe?
1994-01-27 04:30:34 +00:00
17b2a501cd
Stylistic changes.
1994-01-27 04:16:50 +00:00
0496df7164
More stylistic changes.
1994-01-27 04:14:50 +00:00
e84d8b28f3
Stylistic changes.
1994-01-27 04:10:20 +00:00
b6b0ec3424
Fix bug jtc introduced.
1994-01-27 04:07:13 +00:00
7835a85a78
Optimization tweaks:
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Use testl %reg,%reg instead of cmpl $0,%reg
Use xorl %reg,%reg instead of movl $0,%reg
1994-01-24 19:24:36 +00:00
39c0326588
PIC_*() macros moved to <machine/asm.h>
1994-01-07 00:48:22 +00:00
0e09f939b2
Fix bug #24 by renaming _logname_valid to __logname_valid.
1993-12-18 01:02:47 +00:00
cc81da7447
Shorten setup for longword operations a little.
1993-12-10 10:51:11 +00:00
dca61f6f90
Share code.
1993-12-10 10:45:18 +00:00
a9e5cc4f83
No reason these can't share code...
1993-12-08 22:10:14 +00:00
f3f7594fc9
Use PIC_PLT for error returns.
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Correct operand order in accessing `minbrk' and `curbrk'.
1993-12-06 23:28:08 +00:00
417e7a6fff
Remove spurious PIC_EPILOGUE and PIC_GOTOFF macros.
1993-12-06 23:27:04 +00:00
3581f42619
Use PIC_PLT() macro for error returns
1993-12-06 23:26:04 +00:00
0ada107897
update for .S and MACHINE_ARCH
1993-12-04 02:33:35 +00:00
448e711c78
Clean up deleted files.
1993-12-04 01:28:42 +00:00
32d96ccd3c
Remove special case for len == 0 --- It wasn't needed. By dropping the
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conditional, the general case (where we are actually swapping bytes) is
a tiny bit faster.
1993-11-25 01:18:24 +00:00
2be44f5352
copy SYS.h and DEFS.h, too.
1993-11-05 22:44:00 +00:00
4418616857
Move the old berkeley sccs id into the header comment like it is done
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for other source files.
1993-10-21 02:19:25 +00:00
6be8b83abc
Gcc helper functions should still use the ENTRY() macro so they will be
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show up in profiled code. (The gcc helper functions in the other ports
do this allready).
1993-10-21 02:03:37 +00:00
34d1aad0c1
Use PIC_PLT macro with the function calls (as was done with setjmp()).
1993-10-21 01:59:44 +00:00
79591d04bc
So many files in arch/i386 have been changed I might as well run my
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remove unecessary trailing whitespace script.
1993-10-21 01:48:14 +00:00
823c36577c
Change instances of LIBC_RCS back to LIBC_SCCS. If we are going to change
...
th LIBC_RCS, the entire source tree should be updated at once.
Remove && !defined(lint) from conditionals around rcs id's. No one is
ever going to pass a *.s file through lint.
1993-10-21 01:39:55 +00:00
97ad548bc0
Replaced instructions with immediate operands with compatible alternatives
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saving a few bytes while the cycle count remains the same --- could
actually be faster, depending on the cache, prefetch queue, etc.
1993-10-20 18:50:15 +00:00
6802033480
sigsetjmp() for the i386.
1993-10-19 20:44:00 +00:00
39ff8227a8
Makefile.inc, basically a place to put KMSRC definition
1993-10-15 01:24:47 +00:00
479a1c33c9
Provide i386 versions of div and ldiv -- they are simpler than the C versions,
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since the idiv instruction does the right thing wrt truncating towards zero.
1993-10-08 23:57:13 +00:00
e09d2f42db
Use "testb %cl,%cl" instead of "cmpb $0,%cl".
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This saves three cycles per character, and reduces the size of the
function by eight bytes (the loop is unrolled eight times).
Thanks to davidg for pointing this out.
1993-10-08 01:25:51 +00:00
b3f9f8f6f4
Provide an assembly language version of labs().
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Since ints and longs are both 32 bits on a i386, we could alias abs()
and labs() together as mycroft did with memmove()/memcpy(), but I'm
waiting on an interpretation ruling to see if it is legal.
1993-10-08 00:01:04 +00:00
0b9f50897e
make an arch directory in libc, and move all machine dirs into it
1993-10-07 00:17:24 +00:00
jtc