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author | Maxim Yurchuk <maxim-yurchuk@ydb.tech> | 2024-10-18 20:31:38 +0300 |
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committer | GitHub <noreply@github.com> | 2024-10-18 20:31:38 +0300 |
commit | 2a74bac2d2d3bccb4e10120f1ead805640ec9dd0 (patch) | |
tree | 047e4818ced5aaf73f58517629e5260b5291f9f0 /contrib/libs/cxxsupp/builtins/avr/divmodqi4.S | |
parent | 2d9656823e9521d8c29ea4c9a1d0eab78391abfc (diff) | |
parent | 3d834a1923bbf9403cd4a448e7f32b670aa4124f (diff) | |
download | ydb-2a74bac2d2d3bccb4e10120f1ead805640ec9dd0.tar.gz |
Merge pull request #10502 from ydb-platform/mergelibs-241016-1210
Library import 241016-1210
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/avr/divmodqi4.S')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/avr/divmodqi4.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/contrib/libs/cxxsupp/builtins/avr/divmodqi4.S b/contrib/libs/cxxsupp/builtins/avr/divmodqi4.S new file mode 100644 index 0000000000..66cfc0c69b --- /dev/null +++ b/contrib/libs/cxxsupp/builtins/avr/divmodqi4.S @@ -0,0 +1,44 @@ +//===------------- divmodqi4.S - sint8 div & mod --------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// As described at +// https://gcc.gnu.org/wiki/avr-gcc#Exceptions_to_the_Calling_Convention, the +// prototype is `struct {sint8, sint8} __divmodqi4(sint8, sint8)`. +// The sint8 quotient is returned via R24, and the sint8 remainder is returned +// via R25, while registers R23/Rtmp and bit T in SREG are clobbered. +// +//===----------------------------------------------------------------------===// + + .text + .align 2 + +#ifdef __AVR_TINY__ + .set __tmp_reg__, 16 +#else + .set __tmp_reg__, 0 +#endif + + .globl __divmodqi4 + .type __divmodqi4, @function + +__divmodqi4: + bst r24, 7 + mov __tmp_reg__, r24 + eor __tmp_reg__, r22 + sbrc r24, 7 + neg r24 + sbrc r22, 7 + neg r22 + rcall __udivmodqi4 ; Call __udivmodqi4 to do real calculation. + brtc __divmodqi4_1 + neg r25 + +__divmodqi4_1: + sbrc __tmp_reg__, 7 + neg r24 + ret ; Return quotient via R24 and remainder via R25. |