diff options
Diffstat (limited to 'CSAPP/tmul_asm.s')
| -rw-r--r-- | CSAPP/tmul_asm.s | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/CSAPP/tmul_asm.s b/CSAPP/tmul_asm.s new file mode 100644 index 0000000..288a36a --- /dev/null +++ b/CSAPP/tmul_asm.s @@ -0,0 +1,79 @@ + .file "tmul_asm.c" + .text + .globl tmul_bug + .type tmul_bug, @function +tmul_bug: +.LFB0: + .cfi_startproc + imulq %rdi, %rsi + movq %rsi, (%rdx) +#APP +# 5 "tmul_asm.c" 1 + setae %al +# 0 "" 2 +#NO_APP + movl $0, %eax + ret + .cfi_endproc +.LFE0: + .size tmul_bug, .-tmul_bug + .globl tmul_ok + .type tmul_ok, @function +tmul_ok: +.LFB1: + .cfi_startproc + pushq %rbx + .cfi_def_cfa_offset 16 + .cfi_offset 3, -16 + imulq %rdi, %rsi + movq %rsi, (%rdx) +#APP +# 13 "tmul_asm.c" 1 + setae %bl # Set low-order byte + movzbl %bl, %eax # Zero extend to be res +# 0 "" 2 +#NO_APP + popq %rbx + .cfi_def_cfa_offset 8 + ret + .cfi_endproc +.LFE1: + .size tmul_ok, .-tmul_ok + .globl tmul_ok2 + .type tmul_ok2, @function +tmul_ok2: +.LFB2: + .cfi_startproc + imulq %rdi, %rsi + movq %rsi, (%rdx) +#APP +# 27 "tmul_asm.c" 1 + setae %al # Set result +# 0 "" 2 +#NO_APP + movzbl %al, %eax + ret + .cfi_endproc +.LFE2: + .size tmul_ok2, .-tmul_ok2 + .globl umult_ok + .type umult_ok, @function +umult_ok: +.LFB3: + .cfi_startproc + movq %rdx, %rcx +#APP +# 41 "tmul_asm.c" 1 + movq %rdi,%rax #Get x + mulq %rsi # Unsigned long mult x*y + movq %rax,(%rcx) #Store low-order 8bytes at dest + setae %dil #Set result +# 0 "" 2 +#NO_APP + movzbl %dil, %eax + ret + .cfi_endproc +.LFE3: + .size umult_ok, .-umult_ok + .ident "GCC: (GNU) 5.3.1 20160406 (Red Hat 5.3.1-6)" + .section .note.GNU-stack,"",@progbits |