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* config/avr/lib1funcs.S (__ashrdi3, __lshrdi3, __ashldi3)

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(__rotldi3): Shift bytewise if applicable.

From-SVN: r196431
This commit is contained in:
Georg-Johann Lay 2013-03-04 14:01:24 +00:00 • committed by Georg-Johann Lay
parent 2f4e77e81c
commit 0b4ce21bcb
2 changed files with 87 additions and 62 deletions
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5
libgcc/ChangeLog
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@ -1,3 +1,8 @@
2013-03-04 Georg-Johann Lay <avr@gjlay.de>
* config/avr/lib1funcs.S (__ashrdi3, __lshrdi3, __ashldi3)
(__rotldi3): Shift bytewise if applicable.
2013-03-01 James Greenhalgh <james.greenhalgh@arm.com>
* config/aarch64/sync-cache.c

144
libgcc/config/avr/lib1funcs.S
View file

@ -3030,64 +3030,73 @@ ENDF __bswapdi2
;; Arithmetic shift right
;; r25:r18 = ashr64 (r25:r18, r17:r16)
DEFUN __ashrdi3
push r16
andi r16, 63
breq 2f
1: asr r25
ror r24
ror r23
ror r22
ror r21
ror r20
ror r19
ror r18
dec r16
brne 1b
2: pop r16
ret
ENDF __ashrdi3
#endif /* defined (L_ashrdi3) */
bst r25, 7
bld __zero_reg__, 0
;; FALLTHRU
ENDF __ashrdi3
#if defined (L_lshrdi3)
;; Logic shift right
;; r25:r18 = lshr64 (r25:r18, r17:r16)
DEFUN __lshrdi3
push r16
andi r16, 63
breq 2f
1: lsr r25
ror r24
ror r23
ror r22
ror r21
ror r20
ror r19
ror r18
dec r16
brne 1b
2: pop r16
lsr __zero_reg__
sbc __tmp_reg__, __tmp_reg__
push r16
0: cpi r16, 8
brlo 2f
subi r16, 8
mov r18, r19
mov r19, r20
mov r20, r21
mov r21, r22
mov r22, r23
mov r23, r24
mov r24, r25
mov r25, __tmp_reg__
rjmp 0b
1: asr __tmp_reg__
ror r25
ror r24
ror r23
ror r22
ror r21
ror r20
ror r19
ror r18
2: dec r16
brpl 1b
pop r16
ret
ENDF __lshrdi3
#endif /* defined (L_lshrdi3) */
#endif /* defined (L_ashrdi3) */
#if defined (L_ashldi3)
;; Shift left
;; r25:r18 = ashl64 (r25:r18, r17:r16)
DEFUN __ashldi3
push r16
andi r16, 63
breq 2f
1: lsl r18
rol r19
rol r20
rol r21
rol r22
rol r23
rol r24
rol r25
dec r16
brne 1b
2: pop r16
push r16
0: cpi r16, 8
brlo 2f
mov r25, r24
mov r24, r23
mov r23, r22
mov r22, r21
mov r21, r20
mov r20, r19
mov r19, r18
clr r18
subi r16, 8
rjmp 0b
1: lsl r18
rol r19
rol r20
rol r21
rol r22
rol r23
rol r24
rol r25
2: dec r16
brpl 1b
pop r16
ret
ENDF __ashldi3
#endif /* defined (L_ashldi3) */
@ -3096,21 +3105,32 @@ ENDF __ashldi3
;; Shift left
;; r25:r18 = rotl64 (r25:r18, r17:r16)
DEFUN __rotldi3
push r16
andi r16, 63
breq 2f
1: lsl r18
rol r19
rol r20
rol r21
rol r22
rol r23
rol r24
rol r25
adc r18, __zero_reg__
dec r16
brne 1b
2: pop r16
push r16
0: cpi r16, 8
brlo 2f
subi r16, 8
mov __tmp_reg__, r25
mov r25, r24
mov r24, r23
mov r23, r22
mov r22, r21
mov r21, r20
mov r20, r19
mov r19, r18
mov r18, __tmp_reg__
rjmp 0b
1: lsl r18
rol r19
rol r20
rol r21
rol r22
rol r23
rol r24
rol r25
adc r18, __zero_reg__
2: dec r16
brpl 1b
pop r16
ret
ENDF __rotldi3
#endif /* defined (L_rotldi3) */