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| author | Georg-Johann Lay <avr@gjlay.de> | 2013-03-04 14:01:24 +0000 |
|---|---|---|
| committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2013-03-04 14:01:24 +0000 |
| commit | 0b4ce21bcbdbe3766c27030587ba16d002fa77f2 (patch) | |
| tree | a4c7c6232cc0863f1d36ca81cebaf177b6ec7f06 /libgcc/config/avr | |
| parent | 2f4e77e81c02eb4e0122330ab1f2a639c0ea0de9 (diff) | |
| download | gcc-0b4ce21bcbdbe3766c27030587ba16d002fa77f2.zip gcc-0b4ce21bcbdbe3766c27030587ba16d002fa77f2.tar.gz gcc-0b4ce21bcbdbe3766c27030587ba16d002fa77f2.tar.bz2 | |
* config/avr/lib1funcs.S (__ashrdi3, __lshrdi3, __ashldi3)
(__rotldi3): Shift bytewise if applicable.
From-SVN: r196431
Diffstat (limited to 'libgcc/config/avr')
| -rw-r--r-- | libgcc/config/avr/lib1funcs.S | 144 |
1 files changed, 82 insertions, 62 deletions
diff --git a/libgcc/config/avr/lib1funcs.S b/libgcc/config/avr/lib1funcs.S index 961b7ce..f3c6e0c 100644 --- a/libgcc/config/avr/lib1funcs.S +++ b/libgcc/config/avr/lib1funcs.S @@ -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) */ |