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Rev 5363 Rev 7124
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;;                                                              ;;
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;;                                                              ;;
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;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2017. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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$Revision: 5363 $
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$Revision: 7124 $
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init_fpu:
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        clts
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        fninit
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        bt      [cpu_caps+(CAPS_XSAVE/8)], CAPS_XSAVE mod 8
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        jnc     .no_xsave
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        mov     ecx, cr4
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        or      ecx, CR4_OSXSAVE
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        mov     cr4, ecx
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        mov     eax, 0x0d
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        xor     ecx, ecx
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        cpuid
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        mov     ebx, XCR0_FPU_MMX + XCR0_SSE + XCR0_AVX + XCR0_AVX512
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        and     ebx, eax
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        xor     ecx, ecx
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        xgetbv
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        or      eax, ebx
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        xor     ecx, ecx
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        xsetbv
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        mov     eax, 0x0d
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        xor     ecx, ecx
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        cpuid
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        mov     [xsave_area_size], ebx
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        test    eax, XCR0_AVX512
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        jz      @f
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        call    init_avx512
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        ret
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@@:
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        test    eax, XCR0_AVX
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        jz      @f
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        call    init_avx
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        ret
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@@:
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        test    eax, XCR0_SSE
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        jz      @f
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        call    init_sse
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        ret
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@@:
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init_fpu:
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        call    init_fpu_mmx
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        clts
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        ret
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.no_xsave:
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        mov     [xsave_area_size], 512  ; enough for FPU/MMX and SSE
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        bt      [cpu_caps], CAPS_SSE
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        jnc     @f
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        call    init_sse
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        fxsave  [fpu_data]
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        ret
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@@:
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        call    init_fpu_mmx
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        fnsave  [fpu_data]
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        ret
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init_fpu_mmx:
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        mov     ecx, cr0
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        and     ecx, not CR0_EM
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        fninit
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        or      ecx, CR0_MP + CR0_NE
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        mov     cr0, ecx
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        bt      [cpu_caps], CAPS_SSE
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        ret
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        jnc     .no_SSE
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init_sse:
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        mov     ebx, cr4
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        mov     ebx, cr4
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        mov     ecx, cr0
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        mov     ecx, cr0
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        or      ebx, CR4_OSFXSR+CR4_OSXMMEXPT
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        or      ebx, CR4_OSFXSR+CR4_OSXMMEXPT
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        mov     cr4, ebx
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        mov     cr4, ebx
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        and     ecx, not (CR0_MP+CR0_EM)
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        and     ecx, not (CR0_EM + CR0_MP)
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        or      ecx, CR0_NE
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        or      ecx, CR0_NE
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        mov     cr0, ecx
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        mov     cr0, ecx
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        mov     dword [esp-4], SSE_INIT
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        mov     dword [esp-4], MXCSR_INIT
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        ldmxcsr [esp-4]
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        ldmxcsr [esp-4]
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        xorps   xmm0, xmm0
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        xorps   xmm1, xmm1
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        xorps   xmm0, xmm0
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        xorps   xmm1, xmm1
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        xorps   xmm2, xmm2
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        xorps   xmm2, xmm2
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        xorps   xmm3, xmm3
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        xorps   xmm4, xmm4
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        xorps   xmm5, xmm5
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        xorps   xmm6, xmm6
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        xorps   xmm3, xmm3
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        xorps   xmm7, xmm7
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        xorps   xmm4, xmm4
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        ret
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        xorps   xmm5, xmm5
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        xorps   xmm6, xmm6
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init_avx:
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        mov     ebx, cr4
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        or      ebx, CR4_OSFXSR + CR4_OSXMMEXPT
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        mov     cr4, ebx
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        mov     ecx, cr0
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        and     ecx, not (CR0_EM + CR0_MP)
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        or      ecx, CR0_NE
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        mov     cr0, ecx
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        mov     dword [esp-4], MXCSR_INIT
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        vldmxcsr [esp-4]
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        xorps   xmm7, xmm7
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        vzeroall
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        ret
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init_avx512:
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        mov     ebx, cr4
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        or      ebx, CR4_OSFXSR + CR4_OSXMMEXPT
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        mov     cr4, ebx
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        mov     ecx, cr0
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        and     ecx, not (CR0_EM + CR0_MP)
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        or      ecx, CR0_NE
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        mov     cr0, ecx
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        mov     dword [esp-4], MXCSR_INIT
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        vldmxcsr [esp-4]
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        vpxorq  zmm0, zmm0, zmm0
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        fxsave  [fpu_data]    ;[eax]
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        vpxorq  zmm1, zmm1, zmm1
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        ret
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        vpxorq  zmm2, zmm2, zmm2
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.no_SSE:
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        vpxorq  zmm3, zmm3, zmm3
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        pop     ecx
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        pop     ecx
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        ret
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        ret
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align 4
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align 4
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save_context:
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        bt      [cpu_caps+(CAPS_OSXSAVE/8)], CAPS_OSXSAVE mod 8
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        jnc     .no_xsave
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        xsave   [eax]
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        ret
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save_context:
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.no_xsave:
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        bt      [cpu_caps], CAPS_SSE
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        bt      [cpu_caps], CAPS_SSE
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        jnc     .no_SSE
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        jnc     .no_SSE
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        mov     eax, [CURRENT_TASK]
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        mov     eax, [CURRENT_TASK]
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        cmp     ecx, eax
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        cmp     ecx, eax
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        jne     .copy
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        jne     .copy
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        clts
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        bt      [cpu_caps+(CAPS_OSXSAVE/8)], CAPS_OSXSAVE mod 8
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        jnc     .no_xsave
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        xrstor  [esi]
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        popfd
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        pop     esi
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        pop     ecx
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        ret
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        clts
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.no_xsave:
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        bt      [cpu_caps], CAPS_SSE
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        bt      [cpu_caps], CAPS_SSE
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        jnc     .no_SSE
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        jnc     .no_SSE
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