|
Last change
on this file was
e16e8f2,
checked in by Edwin Eefting <edwin@datux.nl>, 3 years ago
|
|
bootstuff
|
-
Property mode set to
100644
|
|
File size:
1.2 KB
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| Rev | Line | |
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| [e16e8f2] | 1 | /* |
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| 2 | * arch/i386/libgcc/__muldi3.S |
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| 3 | * |
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| 4 | * 64*64 = 64 bit unsigned multiplication |
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| 5 | */ |
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| 6 | |
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| 7 | .text |
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| 8 | .align 4 |
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| 9 | .globl __muldi3 |
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| 10 | .type __muldi3,@function |
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| 11 | __muldi3: |
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| 12 | #if __SIZEOF_POINTER__ == 4 |
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| 13 | /* i386 */ |
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| 14 | push %esi |
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| 15 | #ifndef REGPARM |
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| 16 | movl 8(%esp),%eax |
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| 17 | movl %eax,%esi |
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| 18 | movl 16(%esp),%ecx |
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| 19 | mull %ecx |
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| 20 | imull 12(%esp),%ecx |
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| 21 | imull 20(%esp),%esi |
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| 22 | addl %ecx,%edx |
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| 23 | addl %esi,%edx |
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| 24 | #else |
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| 25 | movl %eax,%esi |
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| 26 | push %edx |
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| 27 | mull %ecx |
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| 28 | imull 8(%esp),%esi |
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| 29 | addl %esi,%edx |
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| 30 | pop %esi |
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| 31 | imull %esi,%ecx |
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| 32 | addl %ecx,%edx |
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| 33 | #endif |
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| 34 | pop %esi |
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| 35 | ret |
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| 36 | #elif __SIZEOF_POINTER__ == 8 |
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| 37 | /* x86_64 */ |
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| 38 | push %rsi |
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| 39 | #ifndef REGPARM |
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| 40 | /* |
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| 41 | movl 8(%esp),%eax |
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| 42 | movl %eax,%esi |
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| 43 | movl 16(%esp),%ecx |
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| 44 | mull %ecx |
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| 45 | imull 12(%esp),%ecx |
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| 46 | imull 20(%esp),%esi |
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| 47 | addl %ecx,%edx |
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| 48 | addl %esi,%edx |
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| 49 | */ |
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| 50 | movq 8(%rsp),%rax |
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| 51 | movq %rax,%rsi |
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| 52 | movq 16(%rsp),%rcx |
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| 53 | mulq %rcx |
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| 54 | imulq 12(%rsp),%rcx |
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| 55 | imulq 20(%rsp),%rsi |
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| 56 | addq %rcx,%rdx |
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| 57 | addq %rsi,%rdx |
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| 58 | #else |
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| 59 | /* |
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| 60 | movl %eax,%esi |
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| 61 | push %edx |
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| 62 | mull %ecx |
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| 63 | imull 8(%esp),%esi |
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| 64 | addl %esi,%edx |
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| 65 | pop %rsi |
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| 66 | imull %esi,%ecx |
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| 67 | addl %ecx,%edx |
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| 68 | */ |
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| 69 | movq %rax,%rsi |
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| 70 | pushq %rdx |
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| 71 | mulq %rcx |
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| 72 | imulq 8(%rsp),%rsi |
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| 73 | addq %rsi,%rdx |
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| 74 | popq %rsi |
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| 75 | imulq %rsi,%rcx |
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| 76 | addq %rcx,%rdx |
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| 77 | #endif |
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| 78 | pop %rsi |
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| 79 | ret |
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| 80 | #else |
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| 81 | #error "Unsupported architecture for __muldi3.S" |
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| 82 | #endif |
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| 83 | .size __muldi3,.-__muldi3 |
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