49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
92 lines
1.6 KiB
ArmAsm
92 lines
1.6 KiB
ArmAsm
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <_mingw_mac.h>
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.file "trunc.S"
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.text
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.p2align 4,,15
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.globl __MINGW_USYMBOL(trunc)
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.def __MINGW_USYMBOL(trunc); .scl 2; .type 32; .endef
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#ifdef __x86_64__
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.seh_proc __MINGW_USYMBOL(trunc)
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#endif
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__MINGW_USYMBOL(trunc):
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#if defined(_AMD64_) || defined(__x86_64__)
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subq $24, %rsp
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.seh_stackalloc 24
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.seh_endprologue
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movsd %xmm0, 8(%rsp)
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movq 8(%rsp), %r8
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movq %r8, %rdx
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shrq $32, %rdx
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movl %edx, %eax
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sarl $20, %eax
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andl $2047, %eax
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leal -1023(%rax), %ecx
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cmpl $19, %ecx
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jg .l1
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movl %edx, %r8d
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andl $-2147483648, %r8d
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testl %ecx, %ecx
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js .l3
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movl $1048575, %eax
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sarl %cl, %eax
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notl %eax
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andl %edx, %eax
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orl %r8d, %eax
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salq $32, %rax
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movq %rax, 8(%rsp)
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movsd 8(%rsp), %xmm0
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addq $24, %rsp
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ret
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.p2align 4,,10
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.l1:
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cmpl $51, %ecx
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jle .l2
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/* Is x inf/nan? */
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cmpl $1024, %ecx
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jne .noinfnan
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addsd %xmm0, %xmm0
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.noinfnan:
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addq $24, %rsp
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ret
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.p2align 4,,10
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.l2:
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leal -1043(%rax), %ecx
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movl $-1, %r9d
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salq $32, %rdx
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shrl %cl, %r9d
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notl %r9d
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andl %r9d, %r8d
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orq %r8, %rdx
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movq %rdx, 8(%rsp)
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movsd 8(%rsp), %xmm0
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addq $24, %rsp
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ret
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.p2align 4,,10
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.l3:
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salq $32, %r8
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movq %r8, 8(%rsp)
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movsd 8(%rsp), %xmm0
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addq $24, %rsp
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ret
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.seh_endproc
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#elif defined(_X86_) || defined(__i386__)
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fldl 4(%esp)
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subl $8, %esp
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fstcw (%esp)
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/* FE_TOWARDZERO */
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movzwl (%esp), %eax
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orb $0xc, %ah
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movw %ax, 4(%esp)
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fldcw 4(%esp)
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frndint
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fldcw (%esp)
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addl $8, %esp
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ret
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#endif
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