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161 lines
4.1 KiB
NASM
161 lines
4.1 KiB
NASM
;
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; MIT License
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; -----------
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;
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; Copyright (c) 2002-2019 Advanced Micro Devices, Inc.
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;
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; Permission is hereby granted, free of charge, to any person obtaining a copy
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; of this Software and associated documentaon files (the "Software"), to deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; copies of the Software, and to permit persons to whom the Software is
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; furnished to do so, subject to the following conditions:
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;
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; The above copyright notice and this permission notice shall be included in
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; all copies or substantial portions of the Software.
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;
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; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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; THE SOFTWARE.
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;
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; $Workfile: fmod.asm $
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; $Revision: 4 $
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; $Date: 9/15/04 16:43 $
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;
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;
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; This is an optimized version of fmod.
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;
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; Define _CRTBLD_C9X to make it compliant with C90 and on.
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;
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; If building the OS CRTL (_NTSUBSET_ defined), abort.
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; .ERRDEF _NTSUBSET_, "x87 code cannot be used in kernel mode"
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DOMAIN EQU 1 ; _DOMAIN
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EDOM EQU 33 ; EDOM
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FPCODEFMOD EQU 22 ; _FpCodeFmod
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INVALID EQU 8 ; AMD_F_INVALID
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FPIND EQU 0fff8000000000000h ; indefinite
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FPSNAN EQU 07ff7ffffffffffffh ; SNAN
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FPQNAN EQU 07fffffffffffffffh ; QNAN
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X87SW RECORD X87SW_B: 1,
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X87SW_C3: 1,
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X87SW_TOP: 3,
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X87SW_C: 3,
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X87SW_ES: 1,
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X87SW_SF: 1,
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X87SW_PE: 1,
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X87SW_E: 5
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X87XAM EQU MASK X87SW_C3 OR MASK X87SW_C AND NOT (1 SHL (X87SW_C + 1))
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X87XAM_INF EQU 5 SHL X87SW_C
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X87XAM_NAN EQU 1 SHL X87SW_C
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X87XAM_BAD EQU MASK X87SW_E AND NOT 2
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EXTRN _handle_error: PROC ; float _handle_error (char *fname, int opcode, unsigned long long value, int type, int flags, int error, double arg1, double arg2, int nargs)
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.const
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@fmodz DB "fmod", 0
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.CODE
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; double fmod [double, double] ----------------------------------
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PUBLIC fmod
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fmod PROC FRAME
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sub rsp, 40 + 32
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.ALLOCSTACK 40 + 32
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.ENDPROLOG
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movsd QWORD PTR 24 [rsp + 32], xmm1 ; Y
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movsd QWORD PTR 16 [rsp + 32], xmm0 ; X
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DB 0ddh, 44h, 24h, 38h ; fld QWORD PTR 24 [rsp + 32]
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DB 0ddh, 44h, 24h, 30h ; fld QWORD PTR 16 [rsp + 32]
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DB 0d9h, 0e5h ; fxam (X)
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DB 09bh, 0ddh, 07ch, 024h, 010h ; fstsw 16 [rsp]
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movzx ecx, WORD PTR 16 [rsp]
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and ecx, X87XAM
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fnclex ; clear exception flags
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; in preparation for fprem
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@again:
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DB 0d9h, 0f8h ; fprem
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DB 09bh, 0dfh, 0e0h ; fstsw ax
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test ax, 4 SHL X87SW_C
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jnz @again ; do it again in case of partial result
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DB 0ddh, 01ch, 024h ; fstp QWORD PTR [rsp]
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movlpd xmm0, QWORD PTR [rsp] ; result
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DB 0d9h, 0e5h ; fxam (Y)
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DB 09bh, 0ddh, 07ch, 024h, 008h ; fstsw 8 [rsp]
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movzx edx, WORD PTR 8 [rsp]
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and edx, X87XAM
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DB 0ddh, 0d8h ; fstp st(0)
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cmp edx, X87XAM_NAN ; fmod (x, NAN) = QNAN
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je @error
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cmp ecx, X87XAM_NAN ; fmod (NAN, y) = QNAN
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je @error
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and eax, X87XAM_BAD
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jnz @raise ; handle error
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IFNDEF _CRTBLD_C9X ; Not C90
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cmp edx, X87XAM_INF ; fmod (x, infinity) = ???
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je @raise
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ELSE ; C90
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; fmod (x, infinity) = x (as x87 already does)
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ENDIF
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@exit:
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add rsp, 40 + 32
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ret
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ALIGN 16
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@raise:
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mov eax, INVALID ; raise exception
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mov r8, FPIND
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jmp @fail
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@error:
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xor eax, eax ; no exception
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movd r8, xmm0
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jmp @fail
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@fail:
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lea rcx, @fmodz ; fname
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mov edx, FPCODEFMOD ; opcode
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; mov r8, INDEF ; value
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mov r9d, DOMAIN ; type
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mov DWORD PTR 0 [rsp + 32], eax ; flags
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mov DWORD PTR 8 [rsp + 32], EDOM ; error
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mov DWORD PTR 32 [rsp + 32], 2 ; nargs
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call _handle_error ; (char *fname, int opcode, unsigned long long value, int type, int flags, int error, double arg1, double arg2, int nargs)
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DB 09bh, 0dbh, 0e2h ; fclex
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jmp @exit
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fmod ENDP
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; ---------------------------------------------------------------
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END
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