| /** |
| * 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 "ilogbf.S" |
| .text |
| .p2align 4,,15 |
| .globl __MINGW_USYMBOL(ilogbf) |
| .def __MINGW_USYMBOL(ilogbf); .scl 2; .type 32; .endef |
| #ifdef __x86_64__ |
| .seh_proc __MINGW_USYMBOL(ilogbf) |
| #endif |
| __MINGW_USYMBOL(ilogbf): |
| #ifdef __x86_64__ |
| /* generated code for: |
| int |
| ilogbf (float x) |
| { |
| __mingw_flt_type_t hlp; |
| int hx, ix; |
| |
| hlp.x = x; |
| hx = (int) hlp.val & 0x7fffffff; |
| if (hx < 0x800000) |
| { |
| if (hx == 0) |
| return 0x80000000; // ilogb(0) = FP_ILOGB0 |
| for (ix = -126, hx <<= 8; hx > 0; hx <<= 1) |
| ix -= 1; |
| return ix; |
| } |
| if (hx < 0x7f800000) |
| return (hx >> 23) - 127; |
| return 0x7fffffff; |
| } */ |
| subq $24, %rsp |
| .seh_stackalloc 24 |
| .seh_endprologue |
| movss %xmm0, 12(%rsp) |
| movl 12(%rsp), %edx |
| andl $2147483647, %edx |
| cmpl $8388607, %edx |
| jg .L2 |
| testl %edx, %edx |
| je .L6 |
| sall $8, %edx |
| movl $-126, %eax |
| testl %edx, %edx |
| jle .L3 |
| .p2align 4,,10 |
| .L4: |
| addl %edx, %edx |
| subl $1, %eax |
| testl %edx, %edx |
| jg .L4 |
| .L3: |
| addq $24, %rsp |
| ret |
| .p2align 4,,10 |
| .L2: |
| cmpl $2139095039, %edx |
| jle .L10 |
| movl $2147483647, %eax |
| addq $24, %rsp |
| ret |
| .p2align 4,,10 |
| .L10: |
| sarl $23, %edx |
| leal -127(%rdx), %eax |
| addq $24, %rsp |
| ret |
| .L6: |
| movl $-2147483648, %eax |
| jmp .L3 |
| .seh_endproc |
| #else |
| flds 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 |
