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Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_s_hypotf16_core_avx512.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_s_hypotf16_core_avx512.S | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_s_hypotf16_core_avx512.S b/sysdeps/x86_64/fpu/multiarch/svml_s_hypotf16_core_avx512.S new file mode 100644 index 0000000000..46a156d136 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/svml_s_hypotf16_core_avx512.S @@ -0,0 +1,239 @@ +/* Function hypotf 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: + * + * HIGH LEVEL OVERVIEW + * + * Calculate z = (x*x+y*y) + * Calculate reciplicle sqrt (z) + * Calculate make two NR iterations + * + * ALGORITHM DETAILS + * + * Multiprecision branch for _HA_ only + * Remove sigm from both arguments + * Find maximum (_x) and minimum (_y) (by abs value) between arguments + * Split _x int _a and _b for multiprecision + * If _x >> _y we will we will not split _y for multiprecision + * all _y will be put into lower part (_d) and higher part (_c = 0) + * Fixing _hilo_mask for the case _x >> _y + * Split _y into _c and _d for multiprecision with fixed mask + * + * compute Hi and Lo parts of _z = _x*_x + _y*_y + * + * _zHi = _a*_a + _c*_c + * _zLo = (_x + _a)*_b + _d*_y + _d*_c + * _z = _zHi + _zLo + * + * No multiprecision branch for _LA_ and _EP_ + * _z = _VARG1 * _VARG1 + _VARG2 * _VARG2 + * + * Check _z exponent to be withing borders [1E3 ; 60A] else goto Callout + * + * Compute resciplicle sqrt s0 ~ 1.0/sqrt(_z), + * that multiplied by _z, is final result for _EP_ version. + * + * First iteration (or zero iteration): + * s = z * s0 + * h = .5 * s0 + * d = s * h - .5 + * + * Second iteration: + * h = d * h + h + * s = s * d + s + * d = s * s - z (in multiprecision for _HA_) + * + * result = s - h * d + * + * EP version of the function can be implemented as y[i]=sqrt(a[i]^2+b[i]^2) + * with all intermediate operations done in target precision for i=1,..,n. + * It can return result y[i]=0 in case a[i]^2 and b[i]^2 underflow in target + * precision (for some i). It can return result y[i]=NAN in case + * a[i]^2+b[i]^2 overflow in target precision, for some i. It can return + * result y[i]=NAN in case a[i] or b[i] is infinite, for some i. + * + * + */ + +/* Offsets for data table __svml_shypot_data_internal + */ +#define _sAbsMask 0 +#define _sHalf 64 +#define _iExpBound 128 + +#include <sysdep.h> + + .text + .section .text.exex512,"ax",@progbits +ENTRY(_ZGVeN16vv_hypotf_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 + vgetexpps {sae}, %zmm0, %zmm2 + vgetexpps {sae}, %zmm1, %zmm3 + vmovups _sHalf+__svml_shypot_data_internal(%rip), %zmm6 + vmaxps {sae}, %zmm3, %zmm2, %zmm4 + vmulps {rn-sae}, %zmm0, %zmm0, %zmm2 + vandps _sAbsMask+__svml_shypot_data_internal(%rip), %zmm4, %zmm5 + vfmadd231ps {rn-sae}, %zmm1, %zmm1, %zmm2 + vpcmpd $5, _iExpBound+__svml_shypot_data_internal(%rip), %zmm5, %k0 + vrsqrt14ps %zmm2, %zmm7 + kmovw %k0, %edx + vmulps {rn-sae}, %zmm7, %zmm2, %zmm9 + vmulps {rn-sae}, %zmm7, %zmm6, %zmm8 + vfnmadd231ps {rn-sae}, %zmm9, %zmm9, %zmm2 + vfmadd213ps {rn-sae}, %zmm9, %zmm8, %zmm2 + +/* + * VSCALEF( S, _VRES1, _VRES1, sExp ); + * 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 zmm1 zmm2 + +/* Restore registers + * and exit the function + */ + +L(EXIT): + vmovaps %zmm2, %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 %zmm1, 128(%rsp) + vmovups %zmm2, 192(%rsp) + # LOE rbx r12 r13 r14 r15 edx zmm2 + + 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), %zmm2 + +/* 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 zmm2 + +/* 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 hypotf@PLT + # LOE rbx r14 r15 r12d r13d xmm0 + + movss %xmm0, 192(%rsp,%r14,4) + +/* Process special inputs in loop */ + jmp L(SPECIAL_VALUES_LOOP) + # LOE rbx r15 r12d r13d +END(_ZGVeN16vv_hypotf_skx) + + .section .rodata, "a" + .align 64 + +#ifdef __svml_shypot_data_internal_typedef +typedef unsigned int VUINT32; +typedef struct +{ + __declspec(align(64)) VUINT32 _sAbsMask[16][1]; + __declspec(align(64)) VUINT32 _sHalf[16][1]; + __declspec(align(64)) VUINT32 _iExpBound[16][1]; +} __svml_shypot_data_internal; +#endif +__svml_shypot_data_internal: + .long 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff /* _sAbsMask */ + .align 64 + .long 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000, 0x3f000000 /* _sHalf */ + /* fma based algorithm*/ + .align 64 + .long 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000, 0x427C0000 /* _iExpBound */ + .align 64 + .type __svml_shypot_data_internal,@object + .size __svml_shypot_data_internal,.-__svml_shypot_data_internal |