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lib1funcs.S (__ashldi3): Use __tmp_reg__ to restore R16 instead of push + pop. 

libgcc/
	2016-12-12  George Spelvin  <linux@sciencehorizons.net>
	* config/avr/lib1funcs.S (__ashldi3): Use __tmp_reg__ to restore
	R16 instead of push + pop.
	(__ashrdi3, __lshrdi3): Same. And use __zero_reg__ for signs.

From-SVN: r243545
This commit is contained in:
George Spelvin 2016-12-12 11:25:51 +00:00 committed by Georg-Johann Lay
parent 9e9034937b
commit a5b947fa66
2 changed files with 24 additions and 11 deletions
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6
libgcc/ChangeLog
View File

@ -1,3 +1,9 @@
2016-12-12 George Spelvin <linux@sciencehorizons.net>
* config/avr/lib1funcs.S (__ashldi3): Use __tmp_reg__ to restore
R16 instead of push + pop.
(__ashrdi3, __lshrdi3): Same. And use __zero_reg__ for signs.
2016-12-10 Krister Walfridsson <krister.walfridsson@gmail.com>
* config.host (i[34567]86-*-netbsdelf*): Add i386/t-crtstuff to

29
libgcc/config/avr/lib1funcs.S
View File

@ -3113,20 +3113,22 @@ ENDF __bswapdi2
**********************************/
#if defined (L_ashrdi3)
#define SS __zero_reg__
;; Arithmetic shift right
;; r25:r18 = ashr64 (r25:r18, r17:r16)
DEFUN __ashrdi3
bst r25, 7
bld __zero_reg__, 0
sbrc r25, 7
neg SS
;; FALLTHRU
ENDF __ashrdi3
;; Logic shift right
;; r25:r18 = lshr64 (r25:r18, r17:r16)
DEFUN __lshrdi3
lsr __zero_reg__
sbc __tmp_reg__, __tmp_reg__
push r16
;; Signs are in SS (zero_reg)
mov __tmp_reg__, r16
0: cpi r16, 8
brlo 2f
subi r16, 8
@ -3137,9 +3139,9 @@ DEFUN __lshrdi3
mov r22, r23
mov r23, r24
mov r24, r25
mov r25, __tmp_reg__
mov r25, SS
rjmp 0b
1: asr __tmp_reg__
1: asr SS
ror r25
ror r24
ror r23
@ -3150,16 +3152,21 @@ DEFUN __lshrdi3
ror r18
2: dec r16
brpl 1b
pop r16
clr __zero_reg__
mov r16, __tmp_reg__
ret
ENDF __lshrdi3
#undef SS
#endif /* defined (L_ashrdi3) */
#if defined (L_ashldi3)
;; Shift left
;; r25:r18 = ashl64 (r25:r18, r17:r16)
;; This function does not clobber T.
DEFUN __ashldi3
push r16
mov __tmp_reg__, r16
0: cpi r16, 8
brlo 2f
mov r25, r24
@ -3182,13 +3189,13 @@ DEFUN __ashldi3
rol r25
2: dec r16
brpl 1b
pop r16
mov r16, __tmp_reg__
ret
ENDF __ashldi3
#endif /* defined (L_ashldi3) */
#if defined (L_rotldi3)
;; Shift left
;; Rotate left
;; r25:r18 = rotl64 (r25:r18, r17:r16)
DEFUN __rotldi3
push r16