1 /* 2 * arch/i386/libgcc/__muldi3.S 3 * 4 * 64*64 = 64 bit unsigned multiplication 5 */ 6 7 .text 8 .align 4 9 .globl __muldi3 10 .type __muldi3,@function 11 __muldi3: 12 #if __SIZEOF_POINTER__ == 4 13 /* i386 */ 14 push %esi 15 #ifndef REGPARM 16 movl 8(%esp),%eax 17 movl %eax,%esi 18 movl 16(%esp),%ecx 19 mull %ecx 20 imull 12(%esp),%ecx 21 imull 20(%esp),%esi 22 addl %ecx,%edx 23 addl %esi,%edx 24 #else 25 movl %eax,%esi 26 push %edx 27 mull %ecx 28 imull 8(%esp),%esi 29 addl %esi,%edx 30 pop %esi 31 imull %esi,%ecx 32 addl %ecx,%edx 33 #endif 34 pop %esi 35 ret 36 #elif __SIZEOF_POINTER__ == 8 37 /* x86_64 */ 38 push %rsi 39 #ifndef REGPARM 40 /* 41 movl 8(%esp),%eax 42 movl %eax,%esi 43 movl 16(%esp),%ecx 44 mull %ecx 45 imull 12(%esp),%ecx 46 imull 20(%esp),%esi 47 addl %ecx,%edx 48 addl %esi,%edx 49 */ 50 movq 8(%rsp),%rax 51 movq %rax,%rsi 52 movq 16(%rsp),%rcx 53 mulq %rcx 54 imulq 12(%rsp),%rcx 55 imulq 20(%rsp),%rsi 56 addq %rcx,%rdx 57 addq %rsi,%rdx 58 #else 59 /* 60 movl %eax,%esi 61 push %edx 62 mull %ecx 63 imull 8(%esp),%esi 64 addl %esi,%edx 65 pop %rsi 66 imull %esi,%ecx 67 addl %ecx,%edx 68 */ 69 movq %rax,%rsi 70 pushq %rdx 71 mulq %rcx 72 imulq 8(%rsp),%rsi 73 addq %rsi,%rdx 74 popq %rsi 75 imulq %rsi,%rcx 76 addq %rcx,%rdx 77 #endif 78 pop %rsi 79 ret 80 #else 81 #error "Unsupported architecture for __muldi3.S" 82 #endif 83 .size __muldi3,.-__muldi3 84
