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author | Sascha Hauer <s.hauer@pengutronix.de> | 2012-06-25 09:58:11 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-06-28 13:49:16 +0200 |
commit | e2e494bc02bb0023931500d2bb16c844f07012ac (patch) | |
tree | e32d95d39238c1c6361c2826281cdd318e3b3d78 | |
parent | 51885a7d7321c3e6395c36bc4fe8dde7e78cf562 (diff) | |
download | barebox-e2e494bc02bb0023931500d2bb16c844f07012ac.tar.gz barebox-e2e494bc02bb0023931500d2bb16c844f07012ac.tar.xz |
blackfin: add __ashrdi3
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r-- | arch/blackfin/lib/Makefile | 1 | ||||
-rw-r--r-- | arch/blackfin/lib/ashrdi3.c | 36 |
2 files changed, 37 insertions, 0 deletions
diff --git a/arch/blackfin/lib/Makefile b/arch/blackfin/lib/Makefile index 2f7731824b..cefb4dc89f 100644 --- a/arch/blackfin/lib/Makefile +++ b/arch/blackfin/lib/Makefile @@ -8,6 +8,7 @@ obj-y += smulsi3_highpart.o obj-y += umodsi3.o obj-y += lshrdi3.o obj-y += ashldi3.o +obj-y += ashrdi3.o obj-y += divsi3.o obj-y += modsi3.o obj-y += cpu.o diff --git a/arch/blackfin/lib/ashrdi3.c b/arch/blackfin/lib/ashrdi3.c new file mode 100644 index 0000000000..b5b351e82e --- /dev/null +++ b/arch/blackfin/lib/ashrdi3.c @@ -0,0 +1,36 @@ +/* + * Copyright 2004-2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include "gcclib.h" + +#ifdef CONFIG_ARITHMETIC_OPS_L1 +DItype __ashrdi3(DItype u, word_type b)__attribute__((l1_text)); +#endif + +DItype __ashrdi3(DItype u, word_type b) +{ + DIunion w; + word_type bm; + DIunion uu; + + if (b == 0) + return u; + + uu.ll = u; + + bm = (sizeof(SItype) * BITS_PER_UNIT) - b; + if (bm <= 0) { + /* w.s.high = 1..1 or 0..0 */ + w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1); + w.s.low = uu.s.high >> -bm; + } else { + USItype carries = (USItype) uu.s.high << bm; + w.s.high = uu.s.high >> b; + w.s.low = ((USItype) uu.s.low >> b) | carries; + } + + return w.ll; +} |