| /** |
| * This file has no copyright assigned and is placed in the Public Domain. |
| * This file is part of the w64 mingw-runtime package. |
| * No warranty is given; refer to the file DISCLAIMER within this package. |
| */ |
| #ifdef _WIN64 |
| .file "ilogb.S" |
| .text |
| .align 8 |
| .globl _ilogb |
| .def _ilogb; .scl 2; .type 32; .endef |
| _ilogb: |
| movsd %xmm0,-16(%rsp) |
| fldl -16(%rsp) |
| fxam /* Is NaN or +-Inf? */ |
| fstsw %ax |
| movb $0x45, %dh |
| andb %ah, %dh |
| cmpb $0x05, %dh |
| je 1f /* Is +-Inf, jump. */ |
| |
| fxtract |
| pushq %rax |
| fstp %st |
| |
| fistpl (%rsp) |
| fwait |
| popq %rax |
| |
| ret |
| |
| 1: fstp %st |
| movl $0x7fffffff, %eax |
| ret |
| #else |
| .file "ilogb.S" |
| .text |
| .align 4 |
| .globl _ilogb |
| .def _ilogb; .scl 2; .type 32; .endef |
| _ilogb: |
| |
| fldl 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. */ |
| |
| fxtract |
| pushl %eax |
| fstp %st |
| |
| fistpl (%esp) |
| fwait |
| popl %eax |
| |
| ret |
| |
| 1: fstp %st |
| movl $0x7fffffff, %eax |
| ret |
| #endif |
