diff options
| author | James Hogan <james.hogan@imgtec.com> | 2012-10-05 17:02:09 +0100 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2013-03-02 20:09:52 +0000 |
| commit | 086e9dc0e2ca925b1b58caefd04ed2757d14790b (patch) | |
| tree | cfe182f1d07d40d09d2cae09e337423462250cac /arch/metag/lib/modsi3.S | |
| parent | f507758ccbed5c354cc1ce3b8f53ea072d7bc222 (diff) | |
metag: Optimised library functions
Add optimised library functions for metag.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Diffstat (limited to 'arch/metag/lib/modsi3.S')
| -rw-r--r-- | arch/metag/lib/modsi3.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/metag/lib/modsi3.S b/arch/metag/lib/modsi3.S new file mode 100644 index 000000000000..210cfa856593 --- /dev/null +++ b/arch/metag/lib/modsi3.S @@ -0,0 +1,38 @@ +! Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 +! Imagination Technologies Ltd +! +! Integer modulus routines. +! +!! +!! 32-bit modulus unsigned i/p - passed unsigned 32-bit numbers +!! + .text + .global ___umodsi3 + .type ___umodsi3,function + .align 2 +___umodsi3: + MOV D0FrT,D1RtP ! Save original return address + CALLR D1RtP,___udivsi3 + MOV D1RtP,D0FrT ! Recover return address + MOV D0Re0,D1Ar1 ! Return remainder + MOV PC,D1RtP + .size ___umodsi3,.-___umodsi3 + +!! +!! 32-bit modulus signed i/p - passed signed 32-bit numbers +!! + .global ___modsi3 + .type ___modsi3,function + .align 2 +___modsi3: + MOV D0FrT,D1RtP ! Save original return address + MOV A0.2,D1Ar1 ! Save A in A0.2 + CALLR D1RtP,___divsi3 + MOV D1RtP,D0FrT ! Recover return address + MOV D1Re0,A0.2 ! Recover A + MOV D0Re0,D1Ar1 ! Return remainder + ORS D1Re0,D1Re0,D1Re0 ! Was A negative? + NEG D1Ar1,D1Ar1 ! Negate remainder + MOVMI D0Re0,D1Ar1 ! Return neg remainder + MOV PC, D1RtP + .size ___modsi3,.-___modsi3 |