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path: root/sysdeps/x86_64/fpu/multiarch/svml_s_atan2f16_core_avx512.S
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/* Function atan2f vectorized with AVX-512.
   Copyright (C) 2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   https://www.gnu.org/licenses/.  */

/*
 * ALGORITHM DESCRIPTION:
 *      For    0.0    <= x <=  7.0/16.0: atan(x) = atan(0.0) + atan(s), where s=(x-0.0)/(1.0+0.0*x)
 *      For  7.0/16.0 <= x <= 11.0/16.0: atan(x) = atan(0.5) + atan(s), where s=(x-0.5)/(1.0+0.5*x)
 *      For 11.0/16.0 <= x <= 19.0/16.0: atan(x) = atan(1.0) + atan(s), where s=(x-1.0)/(1.0+1.0*x)
 *      For 19.0/16.0 <= x <= 39.0/16.0: atan(x) = atan(1.5) + atan(s), where s=(x-1.5)/(1.0+1.5*x)
 *      For 39.0/16.0 <= x <=    inf   : atan(x) = atan(inf) + atan(s), where s=-1.0/x
 *      Where atan(s) ~= s+s^3*Poly11(s^2) on interval |s|<7.0/0.16.
 *
 *
 */

/* Offsets for data table __svml_satan2_data_internal
 */
#define sZERO                         	0
#define sONE                          	64
#define sSIGN_MASK                    	128
#define sABS_MASK                     	192
#define sPIO2                         	256
#define sPI                           	320
#define sPC8                          	384
#define sPC7                          	448
#define sPC6                          	512
#define sPC5                          	576
#define sPC4                          	640
#define sPC3                          	704
#define sPC2                          	768
#define sPC1                          	832
#define sPC0                          	896
#define iCHK_WORK_SUB                 	960
#define iCHK_WORK_CMP                 	1024

#include <sysdep.h>

        .text
	.section .text.exex512,"ax",@progbits
ENTRY(_ZGVeN16vv_atan2f_skx)
        pushq     %rbp
        cfi_def_cfa_offset(16)
        movq      %rsp, %rbp
        cfi_def_cfa(6, 16)
        cfi_offset(6, -16)
        andq      $-64, %rsp
        subq      $256, %rsp
        xorl      %edx, %edx

/*
 * #define NO_VECTOR_ZERO_ATAN2_ARGS
 *  Declarations
 * Variables
 * Constants
 *  The end of declarations
 *  Implementation
 * Arguments signs
 */
        vmovups   sABS_MASK+__svml_satan2_data_internal(%rip), %zmm6
        vmovups   sONE+__svml_satan2_data_internal(%rip), %zmm3

/* Testing on working interval. */
        vmovups   iCHK_WORK_SUB+__svml_satan2_data_internal(%rip), %zmm9
        vmovups   iCHK_WORK_CMP+__svml_satan2_data_internal(%rip), %zmm14

/*
 * 1) If y<x then a= y, b=x, PIO2=0
 * 2) If y>x then a=-x, b=y, PIO2=Pi/2
 */
        vmovups   sPIO2+__svml_satan2_data_internal(%rip), %zmm4
        vpternlogd $255, %zmm13, %zmm13, %zmm13
        vmovaps   %zmm1, %zmm8
        vandps    %zmm6, %zmm8, %zmm2
        vandps    %zmm6, %zmm0, %zmm1
        vorps     sSIGN_MASK+__svml_satan2_data_internal(%rip), %zmm2, %zmm5
        vpsubd    %zmm9, %zmm2, %zmm10
        vpsubd    %zmm9, %zmm1, %zmm12
        vxorps    %zmm2, %zmm8, %zmm7
        vxorps    %zmm1, %zmm0, %zmm6
        vcmpps    $17, {sae}, %zmm2, %zmm1, %k1
        vpcmpgtd  %zmm10, %zmm14, %k2
        vpcmpgtd  %zmm12, %zmm14, %k3
        vmovups   sPC6+__svml_satan2_data_internal(%rip), %zmm14
        vblendmps %zmm1, %zmm5, %zmm11{%k1}
        vblendmps %zmm2, %zmm1, %zmm5{%k1}
        vxorps    %zmm4, %zmm4, %zmm4{%k1}

/*
 * Division a/b.
 * Enabled when FMA is available and
 * performance is better with NR iteration
 */
        vrcp14ps  %zmm5, %zmm15
        vfnmadd231ps {rn-sae}, %zmm5, %zmm15, %zmm3
        vfmadd213ps {rn-sae}, %zmm15, %zmm3, %zmm15
        vmulps    {rn-sae}, %zmm15, %zmm11, %zmm3
        vfnmadd231ps {rn-sae}, %zmm5, %zmm3, %zmm11
        vfmadd213ps {rn-sae}, %zmm3, %zmm11, %zmm15
        vmovups   sPC8+__svml_satan2_data_internal(%rip), %zmm11
        vpternlogd $255, %zmm3, %zmm3, %zmm3

/* Polynomial. */
        vmulps    {rn-sae}, %zmm15, %zmm15, %zmm9
        vpandnd   %zmm10, %zmm10, %zmm13{%k2}
        vmulps    {rn-sae}, %zmm9, %zmm9, %zmm10
        vfmadd231ps {rn-sae}, %zmm10, %zmm11, %zmm14
        vmovups   sPC5+__svml_satan2_data_internal(%rip), %zmm11
        vpandnd   %zmm12, %zmm12, %zmm3{%k3}
        vpord     %zmm3, %zmm13, %zmm3
        vmovups   sPC4+__svml_satan2_data_internal(%rip), %zmm13
        vmovups   sPC7+__svml_satan2_data_internal(%rip), %zmm12
        vptestmd  %zmm3, %zmm3, %k0
        vfmadd213ps {rn-sae}, %zmm13, %zmm10, %zmm14
        vfmadd231ps {rn-sae}, %zmm10, %zmm12, %zmm11
        vmovups   sPC3+__svml_satan2_data_internal(%rip), %zmm12
        vmovups   sPC2+__svml_satan2_data_internal(%rip), %zmm13

/*  Special branch for fast (vector) processing of zero arguments  */
        kortestw  %k0, %k0
        vfmadd213ps {rn-sae}, %zmm12, %zmm10, %zmm11
        vmovups   sPC1+__svml_satan2_data_internal(%rip), %zmm12
        vfmadd213ps {rn-sae}, %zmm13, %zmm10, %zmm14
        vmovups   sPC0+__svml_satan2_data_internal(%rip), %zmm13
        vfmadd213ps {rn-sae}, %zmm12, %zmm10, %zmm11
        vfmadd213ps {rn-sae}, %zmm13, %zmm10, %zmm14
        vfmadd213ps {rn-sae}, %zmm14, %zmm9, %zmm11

/* Reconstruction. */
        vfmadd213ps {rn-sae}, %zmm4, %zmm15, %zmm11

/* if x<0, sPI = Pi, else sPI =0 */
        vmovups   __svml_satan2_data_internal(%rip), %zmm15
        vorps     %zmm7, %zmm11, %zmm9
        vcmpps    $18, {sae}, %zmm15, %zmm8, %k4
        vmovups   sPI+__svml_satan2_data_internal(%rip), %zmm11
        vaddps    {rn-sae}, %zmm11, %zmm9, %zmm9{%k4}
        vorps     %zmm6, %zmm9, %zmm10

/* Go to auxilary branch */
        jne       L(AUX_BRANCH)
                                # LOE rbx r12 r13 r14 r15 edx zmm0 zmm1 zmm2 zmm3 zmm4 zmm5 zmm6 zmm7 zmm8 zmm10 zmm11

/* Return from auxilary branch
 * for out of main path inputs
 */

L(AUX_BRANCH_RETURN):
/*
 *  Special branch for fast (vector) processing of zero arguments
 *  The end of implementation
 */
        testl     %edx, %edx

/* Go to special inputs processing branch */
        jne       L(SPECIAL_VALUES_BRANCH)
                                # LOE rbx r12 r13 r14 r15 edx zmm0 zmm8 zmm10

/* Restore registers
 * and exit the function
 */

L(EXIT):
        vmovaps   %zmm10, %zmm0
        movq      %rbp, %rsp
        popq      %rbp
        cfi_def_cfa(7, 8)
        cfi_restore(6)
        ret
        cfi_def_cfa(6, 16)
        cfi_offset(6, -16)

/* Branch to process
 * special inputs
 */

L(SPECIAL_VALUES_BRANCH):
        vmovups   %zmm0, 64(%rsp)
        vmovups   %zmm8, 128(%rsp)
        vmovups   %zmm10, 192(%rsp)
                                # LOE rbx r12 r13 r14 r15 edx zmm10

        xorl      %eax, %eax
                                # LOE rbx r12 r13 r14 r15 eax edx

        vzeroupper
        movq      %r12, 16(%rsp)
        /*  DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -240; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x10, 0xff, 0xff, 0xff, 0x22
        movl      %eax, %r12d
        movq      %r13, 8(%rsp)
        /*  DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -248; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x08, 0xff, 0xff, 0xff, 0x22
        movl      %edx, %r13d
        movq      %r14, (%rsp)
        /*  DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -256; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x00, 0xff, 0xff, 0xff, 0x22
                                # LOE rbx r15 r12d r13d

/* Range mask
 * bits check
 */

L(RANGEMASK_CHECK):
        btl       %r12d, %r13d

/* Call scalar math function */
        jc        L(SCALAR_MATH_CALL)
                                # LOE rbx r15 r12d r13d

/* Special inputs
 * processing loop
 */

L(SPECIAL_VALUES_LOOP):
        incl      %r12d
        cmpl      $16, %r12d

/* Check bits in range mask */
        jl        L(RANGEMASK_CHECK)
                                # LOE rbx r15 r12d r13d

        movq      16(%rsp), %r12
        cfi_restore(12)
        movq      8(%rsp), %r13
        cfi_restore(13)
        movq      (%rsp), %r14
        cfi_restore(14)
        vmovups   192(%rsp), %zmm10

/* Go to exit */
        jmp       L(EXIT)
        /*  DW_CFA_expression: r12 (r12) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -240; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x10, 0xff, 0xff, 0xff, 0x22
        /*  DW_CFA_expression: r13 (r13) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -248; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x08, 0xff, 0xff, 0xff, 0x22
        /*  DW_CFA_expression: r14 (r14) (DW_OP_lit8; DW_OP_minus; DW_OP_const4s: -64; DW_OP_and; DW_OP_const4s: -256; DW_OP_plus)  */
        .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x00, 0xff, 0xff, 0xff, 0x22
                                # LOE rbx r12 r13 r14 r15 zmm10

/* Scalar math fucntion call
 * to process special input
 */

L(SCALAR_MATH_CALL):
        movl      %r12d, %r14d
        movss     64(%rsp,%r14,4), %xmm0
        movss     128(%rsp,%r14,4), %xmm1
        call      atan2f@PLT
                                # LOE rbx r14 r15 r12d r13d xmm0

        movss     %xmm0, 192(%rsp,%r14,4)

/* Process special inputs in loop */
        jmp       L(SPECIAL_VALUES_LOOP)
        cfi_restore(12)
        cfi_restore(13)
        cfi_restore(14)
                                # LOE rbx r15 r12d r13d

/* Auxilary branch
 * for out of main path inputs
 */

L(AUX_BRANCH):
/* Check if at least on of Y or Y is zero: iAXAYZERO */
        vmovups   __svml_satan2_data_internal(%rip), %zmm9

/* Check if both X & Y are not NaNs:  iXYnotNAN */
        vcmpps    $3, {sae}, %zmm8, %zmm8, %k1
        vcmpps    $3, {sae}, %zmm0, %zmm0, %k2
        vpcmpd    $4, %zmm9, %zmm2, %k3
        vpcmpd    $4, %zmm9, %zmm1, %k4

/*
 *  Path for zero arguments (at least one of both)
 * Check if both args are zeros (den. is zero)
 */
        vcmpps    $4, {sae}, %zmm9, %zmm5, %k5

/* Res = sign(Y)*(X<0)?(PIO2+PI):PIO2 */
        vpcmpgtd  %zmm8, %zmm9, %k6
        vpternlogd $255, %zmm14, %zmm14, %zmm14
        vpternlogd $255, %zmm12, %zmm12, %zmm12
        vpternlogd $255, %zmm13, %zmm13, %zmm13
        vpandnd   %zmm2, %zmm2, %zmm14{%k3}
        vpternlogd $255, %zmm2, %zmm2, %zmm2
        vpandnd   %zmm1, %zmm1, %zmm2{%k4}
        vpord     %zmm2, %zmm14, %zmm15
        vpternlogd $255, %zmm2, %zmm2, %zmm2
        vpandnd   %zmm5, %zmm5, %zmm2{%k5}

/* Set sPIO2 to zero if den. is zero */
        vpandnd   %zmm4, %zmm2, %zmm4
        vpandd    %zmm2, %zmm9, %zmm5
        vpord     %zmm5, %zmm4, %zmm2
        vorps     %zmm7, %zmm2, %zmm7
        vaddps    {rn-sae}, %zmm11, %zmm7, %zmm7{%k6}
        vorps     %zmm6, %zmm7, %zmm6
        vpandnd   %zmm8, %zmm8, %zmm12{%k1}
        vpandnd   %zmm0, %zmm0, %zmm13{%k2}
        vandps    %zmm13, %zmm12, %zmm12

/* Check if at least on of Y or Y is zero and not NaN: iAXAYZEROnotNAN */
        vpandd    %zmm12, %zmm15, %zmm1

/* Exclude from previous callout mask zero (and not NaN) arguments */
        vpandnd   %zmm3, %zmm1, %zmm3

/* Go to callout */
        vptestmd  %zmm3, %zmm3, %k0
        kmovw     %k0, %edx

/* Merge results from main and spec path */
        vpandnd   %zmm10, %zmm1, %zmm10
        vpandd    %zmm1, %zmm6, %zmm11
        vpord     %zmm11, %zmm10, %zmm10

/* Return to main vector processing path */
        jmp       L(AUX_BRANCH_RETURN)
                                # LOE rbx r12 r13 r14 r15 edx zmm0 zmm8 zmm10
END(_ZGVeN16vv_atan2f_skx)

        .section .rodata, "a"
        .align 64

#ifdef __svml_satan2_data_internal_typedef
typedef unsigned int VUINT32;
typedef struct {
        __declspec(align(64)) VUINT32 sZERO[16][1];
        __declspec(align(64)) VUINT32 sONE[16][1];
        __declspec(align(64)) VUINT32 sSIGN_MASK[16][1];
        __declspec(align(64)) VUINT32 sABS_MASK[16][1];
        __declspec(align(64)) VUINT32 sPIO2[16][1];
        __declspec(align(64)) VUINT32 sPI[16][1];
        __declspec(align(64)) VUINT32 sPC8[16][1];
        __declspec(align(64)) VUINT32 sPC7[16][1];
        __declspec(align(64)) VUINT32 sPC6[16][1];
        __declspec(align(64)) VUINT32 sPC5[16][1];
        __declspec(align(64)) VUINT32 sPC4[16][1];
        __declspec(align(64)) VUINT32 sPC3[16][1];
        __declspec(align(64)) VUINT32 sPC2[16][1];
        __declspec(align(64)) VUINT32 sPC1[16][1];
        __declspec(align(64)) VUINT32 sPC0[16][1];
        __declspec(align(64)) VUINT32 iCHK_WORK_SUB[16][1];
        __declspec(align(64)) VUINT32 iCHK_WORK_CMP[16][1];
} __svml_satan2_data_internal;
#endif
__svml_satan2_data_internal:
        .long 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 // sZERO
        .align 64
        .long 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000 // sONE
        .align 64
        .long 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000 // sSIGN_MASK
        .align 64
        .long 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF // sABS_MASK
        .align 64
        .long 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB, 0x3FC90FDB // sPIO2
        .align 64
        .long 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB, 0x40490FDB // sPI
        .align 64
        .long 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0, 0x3B322CC0 // sA08
        .align 64
        .long 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631, 0xBC7F2631 // sA07
        .align 64
        .long 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384, 0x3D2BC384 // sA06
        .align 64
        .long 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629, 0xBD987629 // sA05
        .align 64
        .long 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474, 0x3DD96474 // sA04
        .align 64
        .long 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8, 0xBE1161F8 // sA03
        .align 64
        .long 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F, 0x3E4CB79F // sA02
        .align 64
        .long 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49, 0xBEAAAA49 // sA01
        .align 64
        .long 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000, 0x3F800000 // sA00
        .align 64
        .long 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000, 0x81000000 //iCHK_WORK_SUB
        .align 64
        .long 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000, 0xFC000000 //iCHK_WORK_CMP
        .align 64
        .type	__svml_satan2_data_internal,@object
        .size	__svml_satan2_data_internal,.-__svml_satan2_data_internal