| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the mingw-w64 runtime package. |
| * No warranty is given; refer to the file DISCLAIMER.PD within this package. |
| */ |
| #include <_mingw_mac.h> |
| |
| .file "ilogbl.S" |
| .text |
| #ifdef __x86_64__ |
| .align 8 |
| #else |
| .align 4 |
| #endif |
| .globl __MINGW_USYMBOL(ilogbl) |
| .def __MINGW_USYMBOL(ilogbl); .scl 2; .type 32; .endef |
| __MINGW_USYMBOL(ilogbl): |
| #ifdef __x86_64__ |
| fldt (%rcx) |
| fxam /* Is NaN or +-Inf? */ |
| fstsw %ax |
| movb $0x45, %dh |
| andb %ah, %dh |
| cmpb $0x05, %dh |
| je 1f /* Is +-Inf, jump. */ |
| cmpb $0x01, %dh |
| je 1f /* Is NaN, jump. */ |
| |
| fxtract |
| pushq %rax |
| fstp %st |
| |
| fistpl (%rsp) |
| fwait |
| popq %rax |
| |
| ret |
| |
| 1: fstp %st |
| movl $0x7fffffff, %eax |
| ret |
| #else |
| fldt 4(%esp) |
| /* I added the following ugly construct because ilogb(+-Inf) is |
| required to return INT_MAX in ISO C99. |
| -- jakub@redhat.com. */ |
| fxam /* Is NaN or +-Inf? */ |
| fstsw %ax |
| movb $0x45, %dh |
| andb %ah, %dh |
| cmpb $0x05, %dh |
| je 1f /* Is +-Inf, jump. */ |
| cmpb $0x01, %dh |
| je 1f /* Is NaN, jump. */ |
| |
| fxtract |
| pushl %eax |
| fstp %st |
| |
| fistpl (%esp) |
| fwait |
| popl %eax |
| |
| ret |
| |
| 1: fstp %st |
| movl $0x7fffffff, %eax |
| ret |
| #endif |
