mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-04-06 14:10:30 +08:00
Code Issues Packages Projects Releases Wiki Activity

alpha: Improve sysdeps/alpha/divqu.S and sysdeps/alpha/remqu.S

Browse Source 
* sysdeps/alpha/divqu.S (__divqu): Move save of $f0 and excb after
	conditional branch to DIVBYZERO.  Fix unwind info.
	* sysdeps/alpha/remqu.S (__remqu): Move saves of $f0, $f1, $f2 and
	excb after conditional branch to $powerof2.  Add missing unop
	instructions and .align directives and reorder instructions to
	match __divqu.

Signed-off-by: Uroš Bizjak <ubizjak@gmail.com>
This commit is contained in:
Uros Bizjak 2019-04-01 15:58:37 +07:00 committed by Richard Henderson
parent d5ecee822e
commit 993e3107af
3 changed files with 22 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
ChangeLog
View File

@ -1,3 +1,12 @@
2019-04-01 Uros Bizjak <ubizjak@gmail.com>
* sysdeps/alpha/divqu.S (__divqu): Move save of $f0 and excb after
conditional branch to DIVBYZERO. Fix unwind info.
* sysdeps/alpha/remqu.S (__remqu): Move saves of $f0, $f1, $f2 and
excb after conditional branch to $powerof2. Add missing unop
instructions and .align directives and reorder instructions to
match __divqu.
2019-04-01 Richard Henderson <rth@twiddle.net>
* sysdeps/unix/sysv/linux/alpha/kernel-features.h (__NR_shmat):

7
sysdeps/alpha/divqu.S
View File

@ -56,10 +56,10 @@ __divqu:
that's done, we have at least 22 cycles until its results are
ready -- all the time in the world to figure out how we're
going to use the results. */
stt $f0, 0(sp)
excb
beq Y, DIVBYZERO
stt $f0, 0(sp)
excb
stt $f1, 8(sp)
stt $f3, 48(sp)
cfi_rel_offset ($f0, 0)
@ -70,6 +70,7 @@ __divqu:
_ITOFT2 X, $f0, 16, Y, $f1, 24
cvtqt $f0, $f0
cvtqt $f1, $f1
blt X, $x_is_neg
divt/c $f0, $f1, $f0
@ -90,12 +91,12 @@ __divqu:
ldt $f0, 0(sp)
ldt $f3, 48(sp)
lda sp, FRAME(sp)
cfi_remember_state
cfi_restore ($f0)
cfi_restore ($f1)
cfi_restore ($f3)
cfi_def_cfa_offset (0)
lda sp, FRAME(sp)
ret $31, (RA), 1
.align 4

16
sysdeps/alpha/remqu.S
View File

@ -57,19 +57,19 @@ __remqu:
ready -- all the time in the world to figure out how we're
going to use the results. */
subq Y, 1, AT
stt $f0, 0(sp)
and Y, AT, AT
stt $f1, 8(sp)
excb
stt $f3, 48(sp)
beq AT, $powerof2
stt $f0, 0(sp)
excb
stt $f1, 8(sp)
stt $f3, 48(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
cfi_rel_offset ($f3, 48)
mf_fpcr $f3
_ITOFT2 X, $f0, 16, Y, $f1, 24
mf_fpcr $f3
cvtqt $f0, $f0
cvtqt $f1, $f1
@ -116,11 +116,13 @@ $x_is_neg:
cfi_rel_offset ($f2, 24)
_ITOFS AT, $f2, 16
.align 4
addt $f0, $f2, $f0
unop
divt/c $f0, $f1, $f0
unop
/* Ok, we've now the divide issued. Continue with other checks. */
.align 4
ldt $f1, 8(sp)
unop
ldt $f2, 24(sp)