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| author | Sascha Hauer <sha@octopus.labnet.pengutronix.de> | 2007-09-11 10:15:32 +0200 |
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| committer | Sascha Hauer <sha@octopus.labnet.pengutronix.de> | 2007-09-11 10:15:32 +0200 |
| commit | 97c0278dc1cdef940d837be932a284c2bd7f4d35 (patch) | |
| tree | bd0de4b1543c47e6368cd3feaa4b20b2b4c20ed8 /arch/blackfin/lib/umulsi3_highpart.S | |
| parent | 6402a7d5b747008c5b13d8e62d97493b9f852700 (diff) | |
| download | barebox-97c0278dc1cdef940d837be932a284c2bd7f4d35.tar.gz barebox-97c0278dc1cdef940d837be932a284c2bd7f4d35.tar.xz | |
initial blackfin support
Diffstat (limited to 'arch/blackfin/lib/umulsi3_highpart.S')
| -rw-r--r-- | arch/blackfin/lib/umulsi3_highpart.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/blackfin/lib/umulsi3_highpart.S b/arch/blackfin/lib/umulsi3_highpart.S new file mode 100644 index 0000000000..aac8218fb2 --- /dev/null +++ b/arch/blackfin/lib/umulsi3_highpart.S @@ -0,0 +1,23 @@ +.align 2 +.global ___umulsi3_highpart; +.type ___umulsi3_highpart, STT_FUNC; + +#ifdef CONFIG_ARITHMETIC_OPS_L1 +.section .l1.text +#else +.text +#endif + +___umulsi3_highpart: + R2 = R1.H * R0.H, R3 = R1.L * R0.H (FU); + R0 = R1.L * R0.L, R1 = R1.H * R0.L (FU); + R0 >>= 16; + /* Unsigned multiplication has the nice property that we can + ignore carry on this first addition. */ + R0 = R0 + R3; + R0 = R0 + R1; + cc = ac0; + R1 = cc; + R1 = PACK(R1.l,R0.h); + R0 = R1 + R2; + RTS; |