diff options
Diffstat (limited to 'arch/x64/linux/memory/copy.S')
| -rw-r--r-- | arch/x64/linux/memory/copy.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/x64/linux/memory/copy.S b/arch/x64/linux/memory/copy.S new file mode 100644 index 0000000..bf74e0f --- /dev/null +++ b/arch/x64/linux/memory/copy.S @@ -0,0 +1,67 @@ + .text + +/* + * copyMemory. + * + * rdi - source length + * rsi - source data. + * rdx - target length. + * rcx - target data. + */ + .globl _D5tanya6memory2op10copyMemoryFNaNbNixAvAvZv + .type _D5tanya6memory2op10copyMemoryFNaNbNixAvAvZv, @function + +_D5tanya6memory2op10copyMemoryFNaNbNixAvAvZv: + mov %rdi, %rdx + mov %rcx, %rdi + + cmp $0x08, %rdx + jc aligned_1 + test $0x07, %edi + jz aligned_8 + + naligned: + movsb + dec %rdx + test $0x07, %edi + jnz naligned + + aligned_8: + mov %rdx, %rcx + shr $0x03, %rcx + rep movsq + and $0x07, %edx + jz end + + aligned_1: + // Write the remaining bytes + mov %rdx, %rcx + rep movsb + + end: + ret + +/* + * moveMemory. + * + * rdi - source length + * rsi - source data. + * rdx - target length. + * rcx - target data. + */ + .globl _D5tanya6memory2op10moveMemoryFNaNbNixAvAvZv + .type _D5tanya6memory2op10moveMemoryFNaNbNixAvAvZv, @function + +_D5tanya6memory2op10moveMemoryFNaNbNixAvAvZv: + mov %rdi, %rdx + + lea -1(%rdx, %rsi), %rsi + lea -1(%rdx, %rcx), %rdi + mov %rdx, %rcx + + std // Set the direction flag + + rep movsb + + cld // Clear the direction flag + ret |