| 1 | /** |
| 2 | * This file has no copyright assigned and is placed in the Public Domain. |
| 3 | * This file is part of the mingw-w64 runtime package. |
| 4 | * No warranty is given; refer to the file DISCLAIMER.PD within this package. |
| 5 | * |
| 6 | * IEEE 854 double-extended-precision format |
| 7 | * unsigned int mantissa1:32 |
| 8 | * unsigned int mantissa0:32 |
| 9 | * unsigned int exponent:15 |
| 10 | * unsigned int negative:1 |
| 11 | * unsigned int empty:16 |
| 12 | * |
| 13 | * long double _chgsignl(long double x) { |
| 14 | * ((unsigned int *) &x)[2] ^= 0x00008000; |
| 15 | * return x; |
| 16 | * } |
| 17 | */ |
| 18 | |
| 19 | #include <_mingw_mac.h> |
| 20 | |
| 21 | .file "_chgignl.S" |
| 22 | .text |
| 23 | #ifdef __x86_64__ |
| 24 | .align 8 |
| 25 | #else |
| 26 | .align 4 |
| 27 | #endif |
| 28 | .globl __MINGW_USYMBOL(_chgsignl) |
| 29 | .def __MINGW_USYMBOL(_chgsignl); .scl 2; .type 32; .endef |
| 30 | __MINGW_USYMBOL(_chgsignl): |
| 31 | #if defined(_AMD64_) || defined(__x86_64__) |
| 32 | movq (%rdx), %rax |
| 33 | movq 8(%rdx), %rdx |
| 34 | xorq $0x8000, %rdx |
| 35 | movq %rax, (%rcx) |
| 36 | movq %rdx, 8(%rcx) |
| 37 | movq %rcx, %rax |
| 38 | ret |
| 39 | #elif defined(_X86_) || defined(__i386__) |
| 40 | movl 12(%esp),%eax |
| 41 | xorl $0x8000,%eax |
| 42 | movl %eax,12(%esp) |
| 43 | fldt 4(%esp) |
| 44 | ret |
| 45 | #endif |
| 46 | |