diff options
Diffstat (limited to 'contrib/compiler-rt/lib/builtins/riscv/mulsi3.S')
| -rw-r--r-- | contrib/compiler-rt/lib/builtins/riscv/mulsi3.S | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/builtins/riscv/mulsi3.S b/contrib/compiler-rt/lib/builtins/riscv/mulsi3.S new file mode 100644 index 000000000000..a58d237040b6 --- /dev/null +++ b/contrib/compiler-rt/lib/builtins/riscv/mulsi3.S @@ -0,0 +1,28 @@ +//===--- mulsi3.S - Integer multiplication routines routines ---===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#if !defined(__riscv_mul) && __riscv_xlen == 32 + .text + .align 2 + + .globl __mulsi3 + .type __mulsi3, @function +__mulsi3: + mv a2, a0 + mv a0, zero +.L1: + andi a3, a1, 1 + beqz a3, .L2 + add a0, a0, a2 +.L2: + srli a1, a1, 1 + slli a2, a2, 1 + bnez a1, .L1 + ret +#endif |