diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-25 16:53:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-25 16:53:11 -0700 |
| commit | e0e170bd7ded2ec16e2813d63c0faff43193fde8 (patch) | |
| tree | 2f06008b61ef2eedf8f77d1326e286a64e426ef6 /arch/microblaze/lib/mulsi3.S | |
| parent | b20f9e5bddddb5ef0d743d6e0d409ffc8cf9fc56 (diff) | |
| parent | b843e4ec01991a386a9e0e9030703524446e03da (diff) | |
Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
* 'next' of git://git.monstr.eu/linux-2.6-microblaze: (42 commits)
microblaze: Fix build with make 3.82
fbdev/xilinxfb: Microblaze driver support
microblaze: Support C optimized lib functions for little-endian
microblaze: Separate library optimized functions
microblaze: Support timer on AXI lite
microblaze: Add support for little-endian Microblaze
microblaze: KGDB little endian support
microblaze: Add PVR for endians plus detection
net: emaclite: Add support for little-endian platforms
microblaze: trivial: Add comment for AXI pvr
microblaze: pci-common cleanup
microblaze: Support early console on uart16550
microblaze: Do not compile early console support for uartlite if is disabled
microblaze: Setup early console dynamically
microblaze: Rename all uartlite early printk functions
microblaze: remove early printk uarlite console dependency from header
microblaze: Remove additional compatible properties
microblaze: Remove hardcoded asm instraction for PVR loading
microblaze: Use static const char * const where possible
microblaze: Define VMALLOC_START/END
...
Diffstat (limited to 'arch/microblaze/lib/mulsi3.S')
| -rw-r--r-- | arch/microblaze/lib/mulsi3.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/microblaze/lib/mulsi3.S b/arch/microblaze/lib/mulsi3.S new file mode 100644 index 00000000000..90bd7b93afe --- /dev/null +++ b/arch/microblaze/lib/mulsi3.S @@ -0,0 +1,46 @@ +#include <linux/linkage.h> + +/* + * Multiply operation for 32 bit integers. + * Input : Operand1 in Reg r5 + * Operand2 in Reg r6 + * Output: Result [op1 * op2] in Reg r3 + */ + .text + .globl __mulsi3 + .type __mulsi3, @function + .ent __mulsi3 + +__mulsi3: + .frame r1, 0, r15 + add r3, r0, r0 + beqi r5, result_is_zero /* multiply by zero */ + beqi r6, result_is_zero /* multiply by zero */ + bgeid r5, r5_pos + xor r4, r5, r6 /* get the sign of the result */ + rsubi r5, r5, 0 /* make r5 positive */ +r5_pos: + bgei r6, r6_pos + rsubi r6, r6, 0 /* make r6 positive */ +r6_pos: + bri l1 +l2: + add r5, r5, r5 +l1: + srl r6, r6 + addc r7, r0, r0 + beqi r7, l2 + bneid r6, l2 + add r3, r3, r5 + blti r4, negateresult + rtsd r15, 8 + nop +negateresult: + rtsd r15, 8 + rsub r3, r3, r0 +result_is_zero: + rtsd r15, 8 + addi r3, r0, 0 + +.size __mulsi3, . - __mulsi3 +.end __mulsi3 |