| /** | |
| * 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. | |
| */ | |
| /* | |
| * frexpl(long double x, int* expnt) extracts the exponent from x. | |
| * It returns an integer power of two to expnt and the significand | |
| * between 0.5 and 1 to y. Thus x = y * 2**expn. | |
| */ | |
| #ifdef _WIN64 | |
| .align 2 | |
| .globl _frexpl | |
| _frexpl: | |
| pushq %rbp | |
| movq %rsp,%rbp | |
| subq $24,%rsp | |
| pushq %rsi | |
| pushq %rbx | |
| fldt (%rdx) | |
| movq %r8,%rbx | |
| movq %rcx,%r9 | |
| fld %st(0) | |
| fstpt -24(%rbp) | |
| leaq -8(%rbp),%rcx | |
| movw -8(%rbp),%dx | |
| andq $32767,%rdx | |
| jne L25 | |
| fldz | |
| fucompp | |
| fnstsw %ax | |
| andb $68,%ah | |
| xorb $64,%ah | |
| jne L21 | |
| movq $0,(%rbx) | |
| fldz | |
| jmp L24 | |
| .align 2,0x90 | |
| .align 2,0x90 | |
| L21: | |
| fldt -24(%rbp) | |
| fadd %st(0),%st | |
| fstpt -24(%rbp) | |
| decq %rdx | |
| movw (%rcx),%si | |
| andq $32767,%rsi | |
| jne L22 | |
| cmpq $-66,%rdx | |
| jg L21 | |
| L22: | |
| addq %rsi,%rdx | |
| jmp L19 | |
| .align 2,0x90 | |
| L25: | |
| fstp %st(0) | |
| L19: | |
| addq $-16382,%rdx | |
| movq %rdx,(%rbx) | |
| movw (%rcx),%ax | |
| andq $-32768,%rax | |
| orq $16382,%rax | |
| movw %ax,(%rcx) | |
| fldt -24(%rbp) | |
| L24: | |
| leaq -40(%rbp),%rsp | |
| popq %rbx | |
| popq %rsi | |
| movq %r9,%rax | |
| fstpt (%r9) | |
| leave | |
| ret | |
| #else | |
| /* | |
| * frexpl(long double x, int* expnt) extracts the exponent from x. | |
| * It returns an integer power of two to expnt and the significand | |
| * between 0.5 and 1 to y. Thus x = y * 2**expn. | |
| */ | |
| .align 2 | |
| .globl _frexpl | |
| _frexpl: | |
| pushl %ebp | |
| movl %esp,%ebp | |
| subl $24,%esp | |
| pushl %esi | |
| pushl %ebx | |
| fldt 8(%ebp) | |
| movl 20(%ebp),%ebx | |
| fld %st(0) | |
| fstpt -12(%ebp) | |
| leal -4(%ebp),%ecx | |
| movw -4(%ebp),%dx | |
| andl $32767,%edx | |
| jne L25 | |
| fldz | |
| fucompp | |
| fnstsw %ax | |
| andb $68,%ah | |
| xorb $64,%ah | |
| jne L21 | |
| movl $0,(%ebx) | |
| fldz | |
| jmp L24 | |
| .align 2,0x90 | |
| .align 2,0x90 | |
| L21: | |
| fldt -12(%ebp) | |
| fadd %st(0),%st | |
| fstpt -12(%ebp) | |
| decl %edx | |
| movw (%ecx),%si | |
| andl $32767,%esi | |
| jne L22 | |
| cmpl $-66,%edx | |
| jg L21 | |
| L22: | |
| addl %esi,%edx | |
| jmp L19 | |
| .align 2,0x90 | |
| L25: | |
| fstp %st(0) | |
| L19: | |
| addl $-16382,%edx | |
| movl %edx,(%ebx) | |
| movw (%ecx),%ax | |
| andl $-32768,%eax | |
| orl $16382,%eax | |
| movw %ax,(%ecx) | |
| fldt -12(%ebp) | |
| L24: | |
| leal -32(%ebp),%esp | |
| popl %ebx | |
| popl %esi | |
| leave | |
| ret | |
| #endif |