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-rw-r--r--sysdeps/sparc/sparc32/sdiv.S190
1 files changed, 92 insertions, 98 deletions
diff --git a/sysdeps/sparc/sparc32/sdiv.S b/sysdeps/sparc/sparc32/sdiv.S
index 02ed2e973c..4b325476d7 100644
--- a/sysdeps/sparc/sparc32/sdiv.S
+++ b/sysdeps/sparc/sparc32/sdiv.S
@@ -37,22 +37,14 @@
-#include "sysdep.h"
-#ifdef __linux__
-#include <asm/traps.h>
-#else
-#ifdef __svr4__
+#include <sysdep.h>
#include <sys/trap.h>
-#else
-#include <machine/trap.h>
-#endif
-#endif
ENTRY(.div)
! compute sign of result; if neither is negative, no problem
orcc %o1, %o0, %g0 ! either negative?
bge 2f ! no, go do the divide
- xor %o1, %o0, %g6 ! compute sign in any case
+ xor %o1, %o0, %g3 ! compute sign in any case
tst %o1
bge 1f
tst %o0
@@ -76,11 +68,11 @@ ENTRY(.div)
1:
cmp %o3, %o5 ! if %o1 exceeds %o0, done
- blu Lgot_result ! (and algorithm fails otherwise)
+ blu LOC(got_result) ! (and algorithm fails otherwise)
clr %o2
sethi %hi(1 << (32 - 4 - 1)), %g1
cmp %o3, %g1
- blu Lnot_really_big
+ blu LOC(not_really_big)
clr %o4
! Here the dividend is >= 2**(31-N) or so. We must be careful here,
@@ -91,15 +83,15 @@ ENTRY(.div)
1:
cmp %o5, %g1
bgeu 3f
- mov 1, %g7
+ mov 1, %g2
sll %o5, 4, %o5
b 1b
add %o4, 1, %o4
- ! Now compute %g7.
+ ! Now compute %g2.
2: addcc %o5, %o5, %o5
- bcc Lnot_too_big
- add %g7, 1, %g7
+ bcc LOC(not_too_big)
+ add %g2, 1, %g2
! We get here if the %o1 overflowed while shifting.
! This means that %o3 has the high-order bit set.
@@ -107,20 +99,20 @@ ENTRY(.div)
sll %g1, 4, %g1 ! high order bit
srl %o5, 1, %o5 ! rest of %o5
add %o5, %g1, %o5
- b Ldo_single_div
- sub %g7, 1, %g7
+ b LOC(do_single_div)
+ sub %g2, 1, %g2
- Lnot_too_big:
+ LOC(not_too_big):
3: cmp %o5, %o3
blu 2b
nop
- be Ldo_single_div
+ be LOC(do_single_div)
nop
/* NB: these are commented out in the V8-Sparc manual as well */
/* (I do not understand this) */
! %o5 > %o3: went too far: back up 1 step
! srl %o5, 1, %o5
- ! dec %g7
+ ! dec %g2
! do single-bit divide steps
!
! We have to be careful here. We know that %o3 >= %o5, so we can do the
@@ -129,15 +121,15 @@ ENTRY(.div)
! order bit set in the first step, just falling into the regular
! division loop will mess up the first time around.
! So we unroll slightly...
- Ldo_single_div:
- subcc %g7, 1, %g7
- bl Lend_regular_divide
+ LOC(do_single_div):
+ subcc %g2, 1, %g2
+ bl LOC(end_regular_divide)
nop
sub %o3, %o5, %o3
mov 1, %o2
- b Lend_single_divloop
+ b LOC(end_single_divloop)
nop
- Lsingle_divloop:
+ LOC(single_divloop):
sll %o2, 1, %o2
bl 1f
srl %o5, 1, %o5
@@ -149,221 +141,223 @@ ENTRY(.div)
add %o3, %o5, %o3
sub %o2, 1, %o2
2:
- Lend_single_divloop:
- subcc %g7, 1, %g7
- bge Lsingle_divloop
+ LOC(end_single_divloop):
+ subcc %g2, 1, %g2
+ bge LOC(single_divloop)
tst %o3
- b,a Lend_regular_divide
+ b,a LOC(end_regular_divide)
-Lnot_really_big:
+LOC(not_really_big):
1:
sll %o5, 4, %o5
cmp %o5, %o3
bleu 1b
addcc %o4, 1, %o4
- be Lgot_result
+ be LOC(got_result)
sub %o4, 1, %o4
tst %o3 ! set up for initial iteration
-Ldivloop:
+LOC(divloop):
sll %o2, 4, %o2
! depth 1, accumulated bits 0
- bl L.1.16
+ bl LOC(1.16)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 2, accumulated bits 1
- bl L.2.17
+ bl LOC(2.17)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 3, accumulated bits 3
- bl L.3.19
+ bl LOC(3.19)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 4, accumulated bits 7
- bl L.4.23
+ bl LOC(4.23)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (7*2+1), %o2
-
-L.4.23:
+
+LOC(4.23):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (7*2-1), %o2
-
-
-L.3.19:
+
+
+LOC(3.19):
! remainder is negative
addcc %o3,%o5,%o3
! depth 4, accumulated bits 5
- bl L.4.21
+ bl LOC(4.21)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (5*2+1), %o2
-
-L.4.21:
+
+LOC(4.21):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (5*2-1), %o2
-
-
-
-L.2.17:
+
+
+
+LOC(2.17):
! remainder is negative
addcc %o3,%o5,%o3
! depth 3, accumulated bits 1
- bl L.3.17
+ bl LOC(3.17)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 4, accumulated bits 3
- bl L.4.19
+ bl LOC(4.19)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (3*2+1), %o2
-
-L.4.19:
+
+LOC(4.19):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (3*2-1), %o2
-
-
-L.3.17:
+
+
+LOC(3.17):
! remainder is negative
addcc %o3,%o5,%o3
! depth 4, accumulated bits 1
- bl L.4.17
+ bl LOC(4.17)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (1*2+1), %o2
-
-L.4.17:
+
+LOC(4.17):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (1*2-1), %o2
-
-
-
-
-L.1.16:
+
+
+
+
+LOC(1.16):
! remainder is negative
addcc %o3,%o5,%o3
! depth 2, accumulated bits -1
- bl L.2.15
+ bl LOC(2.15)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 3, accumulated bits -1
- bl L.3.15
+ bl LOC(3.15)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 4, accumulated bits -1
- bl L.4.15
+ bl LOC(4.15)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (-1*2+1), %o2
-
-L.4.15:
+
+LOC(4.15):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (-1*2-1), %o2
-
-
-L.3.15:
+
+
+LOC(3.15):
! remainder is negative
addcc %o3,%o5,%o3
! depth 4, accumulated bits -3
- bl L.4.13
+ bl LOC(4.13)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (-3*2+1), %o2
-
-L.4.13:
+
+LOC(4.13):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (-3*2-1), %o2
-
-
-
-L.2.15:
+
+
+
+LOC(2.15):
! remainder is negative
addcc %o3,%o5,%o3
! depth 3, accumulated bits -3
- bl L.3.13
+ bl LOC(3.13)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
! depth 4, accumulated bits -5
- bl L.4.11
+ bl LOC(4.11)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (-5*2+1), %o2
-
-L.4.11:
+
+LOC(4.11):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (-5*2-1), %o2
-
-
-L.3.13:
+
+
+LOC(3.13):
! remainder is negative
addcc %o3,%o5,%o3
! depth 4, accumulated bits -7
- bl L.4.9
+ bl LOC(4.9)
srl %o5,1,%o5
! remainder is positive
subcc %o3,%o5,%o3
b 9f
add %o2, (-7*2+1), %o2
-
-L.4.9:
+
+LOC(4.9):
! remainder is negative
addcc %o3,%o5,%o3
b 9f
add %o2, (-7*2-1), %o2
-
-
-
-
+
+
+
+
9:
-Lend_regular_divide:
+LOC(end_regular_divide):
subcc %o4, 1, %o4
- bge Ldivloop
+ bge LOC(divloop)
tst %o3
- bl,a Lgot_result
+ bl,a LOC(got_result)
! non-restoring fixup here (one instruction only!)
sub %o2, 1, %o2
-Lgot_result:
+LOC(got_result):
! check to see if answer should be < 0
- tst %g6
+ tst %g3
bl,a 1f
sub %g0, %o2, %o2
1:
retl
mov %o2, %o0
+
+END(.div)