diff options
| author | Georg-Johann Lay <avr@gjlay.de> | 2022-09-19 09:46:58 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-09-19 09:50:28 +0200 |
| commit | 0b5b8ac5cb7fe92dd17ae8bd7de84640daa59e84 (patch) | |
| tree | 0254c2d699754101110a5fff6ea0b5052b4da96c /libgcc | |
| parent | 0990a778376b63b789a8ff5aa949325ba375c025 (diff) | |
| download | gcc-0b5b8ac5cb7fe92dd17ae8bd7de84640daa59e84.tar.gz | |
Fix PR target/99184: Wrong cast from double to 16-bit and 32-bit ints
this patch fixed PR target/99184 which incorrectly rounded during 64-bit
(long) double to 16-bit and 32-bit integers.
The patch just removes the respective roundings from
libf7-asm.sx::to_integer and ::to_unsigned. Luckily, LibF7 does nowhere
use respective functions internally, the only user is in libf7.c::f7_exp
which reads
f7_round (qq, qq);
int16_t q = f7_get_s16 (qq);
so that f7_get_s16() operates on an already rounded value, and therefore
this code works unaltered with or without rounding in to_integer.
PR target/99184
libgcc/config/avr/libf7/
* libf7-asm.sx (to_integer, to_unsigned): Don't round 16-bit
and 32-bit integers.
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/config/avr/libf7/libf7-asm.sx | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/libgcc/config/avr/libf7/libf7-asm.sx b/libgcc/config/avr/libf7/libf7-asm.sx index cfdbecdeffe..752a939f616 100644 --- a/libgcc/config/avr/libf7/libf7-asm.sx +++ b/libgcc/config/avr/libf7/libf7-asm.sx @@ -601,9 +601,6 @@ DEFUN to_integer tst C6 brmi .Lsaturate.T ; > INTxx_MAX => saturate - rcall .Lround - brmi .Lsaturate.T ; > INTxx_MAX => saturate - brtc 9f ; >= 0 => return sbrc Mask, 5 .global __negdi2 @@ -658,30 +655,6 @@ DEFUN to_integer .global __clr_8 XJMP __clr_8 -.Lround: - ;; C6.7 is known to be 0 here. - ;; Return N = 1 iff we have to saturate. - cpi Mask, 0xf - breq .Lround16 - cpi Mask, 0x1f - breq .Lround32 - - ;; For now, no rounding in the 64-bit case. This rounding - ;; would have to be integrated into the right-shift. - cln - ret - -.Lround32: - rol C2 - adc C3, ZERO - adc C4, ZERO - rjmp 2f - -.Lround16: - rol C4 -2: adc C5, ZERO - adc C6, ZERO - ret ENDF to_integer #endif /* F7MOD_to_integer_ */ @@ -725,29 +698,6 @@ DEFUN to_unsigned clr CA F7call lshrdi3 POP r16 - - ;; Rounding - ;; ??? C6.7 is known to be 0 here. - cpi Mask, 0xf - breq .Lround16 - cpi Mask, 0x1f - breq .Lround32 - - ;; For now, no rounding in the 64-bit case. This rounding - ;; would have to be integrated into the right-shift. - ret - -.Lround32: - rol C2 - adc C3, ZERO - adc C4, ZERO - rjmp 2f - -.Lround16: - rol C4 -2: adc C5, ZERO - adc C6, ZERO - brcs .Lset_0xffff ; Rounding overflow => saturate ret .Lset_0xffff: |