diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/svml_d_log28_core_avx512.S')
-rw-r--r-- | sysdeps/x86_64/fpu/multiarch/svml_d_log28_core_avx512.S | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/svml_d_log28_core_avx512.S b/sysdeps/x86_64/fpu/multiarch/svml_d_log28_core_avx512.S new file mode 100644 index 0000000000..211a78f315 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/svml_d_log28_core_avx512.S @@ -0,0 +1,293 @@ +/* Function log2 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: + * + * Get short reciprocal approximation Rcp ~ 1/mantissa(x) + * R = Rcp*x - 1.0 + * log2(x) = k - log2(Rcp) + poly_approximation(R) + * log2(Rcp) is tabulated + * + * + */ + +/* Offsets for data table __svml_dlog2_data_internal_avx512 + */ +#define Log_tbl 0 +#define One 128 +#define C075 192 +#define poly_coeff9 256 +#define poly_coeff8 320 +#define poly_coeff7 384 +#define poly_coeff6 448 +#define poly_coeff5 512 +#define poly_coeff4 576 +#define poly_coeff3 640 +#define poly_coeff2 704 +#define poly_coeff1 768 + +#include <sysdep.h> + + .text + .section .text.evex512,"ax",@progbits +ENTRY(_ZGVeN8v_log2_skx) + pushq %rbp + cfi_def_cfa_offset(16) + movq %rsp, %rbp + cfi_def_cfa(6, 16) + cfi_offset(6, -16) + andq $-64, %rsp + subq $192, %rsp + vmovaps %zmm0, %zmm7 + vgetmantpd $8, {sae}, %zmm7, %zmm6 + vmovups One+__svml_dlog2_data_internal_avx512(%rip), %zmm2 + vmovups poly_coeff5+__svml_dlog2_data_internal_avx512(%rip), %zmm12 + vmovups poly_coeff3+__svml_dlog2_data_internal_avx512(%rip), %zmm13 + +/* Start polynomial evaluation */ + vmovups poly_coeff9+__svml_dlog2_data_internal_avx512(%rip), %zmm10 + vmovups poly_coeff8+__svml_dlog2_data_internal_avx512(%rip), %zmm0 + vmovups poly_coeff7+__svml_dlog2_data_internal_avx512(%rip), %zmm11 + vmovups poly_coeff6+__svml_dlog2_data_internal_avx512(%rip), %zmm14 + +/* Prepare exponent correction: DblRcp<0.75? */ + vmovups C075+__svml_dlog2_data_internal_avx512(%rip), %zmm1 + +/* Table lookup */ + vmovups __svml_dlog2_data_internal_avx512(%rip), %zmm4 + +/* GetExp(x) */ + vgetexppd {sae}, %zmm7, %zmm5 + +/* DblRcp ~ 1/Mantissa */ + vrcp14pd %zmm6, %zmm8 + +/* x<=0? */ + vfpclasspd $94, %zmm7, %k0 + +/* round DblRcp to 4 fractional bits (RN mode, no Precision exception) */ + vrndscalepd $88, {sae}, %zmm8, %zmm3 + vmovups poly_coeff4+__svml_dlog2_data_internal_avx512(%rip), %zmm8 + kmovw %k0, %edx + +/* Reduced argument: R = DblRcp*Mantissa - 1 */ + vfmsub213pd {rn-sae}, %zmm2, %zmm3, %zmm6 + vcmppd $17, {sae}, %zmm1, %zmm3, %k1 + vfmadd231pd {rn-sae}, %zmm6, %zmm12, %zmm8 + vmovups poly_coeff2+__svml_dlog2_data_internal_avx512(%rip), %zmm12 + vfmadd231pd {rn-sae}, %zmm6, %zmm10, %zmm0 + vfmadd231pd {rn-sae}, %zmm6, %zmm11, %zmm14 + vmovups poly_coeff1+__svml_dlog2_data_internal_avx512(%rip), %zmm1 + +/* R^2 */ + vmulpd {rn-sae}, %zmm6, %zmm6, %zmm15 + vfmadd231pd {rn-sae}, %zmm6, %zmm13, %zmm12 + +/* Prepare table index */ + vpsrlq $48, %zmm3, %zmm9 + +/* add 1 to Expon if DblRcp<0.75 */ + vaddpd {rn-sae}, %zmm2, %zmm5, %zmm5{%k1} + vmulpd {rn-sae}, %zmm15, %zmm15, %zmm13 + vfmadd213pd {rn-sae}, %zmm14, %zmm15, %zmm0 + vfmadd213pd {rn-sae}, %zmm12, %zmm15, %zmm8 + vpermt2pd Log_tbl+64+__svml_dlog2_data_internal_avx512(%rip), %zmm9, %zmm4 + +/* polynomial */ + vfmadd213pd {rn-sae}, %zmm8, %zmm13, %zmm0 + vfmadd213pd {rn-sae}, %zmm1, %zmm6, %zmm0 + vfmadd213pd {rn-sae}, %zmm4, %zmm0, %zmm6 + vaddpd {rn-sae}, %zmm6, %zmm5, %zmm0 + testl %edx, %edx + +/* Go to special inputs processing branch */ + jne L(SPECIAL_VALUES_BRANCH) + # LOE rbx r12 r13 r14 r15 edx zmm0 zmm7 + +/* Restore registers + * and exit the function + */ + +L(EXIT): + 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 %zmm7, 64(%rsp) + vmovups %zmm0, 128(%rsp) + # LOE rbx r12 r13 r14 r15 edx zmm0 + + 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: -176; DW_OP_plus) */ + .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 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: -184; DW_OP_plus) */ + .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 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: -192; DW_OP_plus) */ + .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 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 $8, %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 128(%rsp), %zmm0 + +/* 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: -176; DW_OP_plus) */ + .cfi_escape 0x10, 0x0c, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x50, 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: -184; DW_OP_plus) */ + .cfi_escape 0x10, 0x0d, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x48, 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: -192; DW_OP_plus) */ + .cfi_escape 0x10, 0x0e, 0x0e, 0x38, 0x1c, 0x0d, 0xc0, 0xff, 0xff, 0xff, 0x1a, 0x0d, 0x40, 0xff, 0xff, 0xff, 0x22 + # LOE rbx r12 r13 r14 r15 zmm0 + +/* Scalar math fucntion call + * to process special input + */ + +L(SCALAR_MATH_CALL): + movl %r12d, %r14d + movsd 64(%rsp,%r14,8), %xmm0 + call log2@PLT + # LOE rbx r14 r15 r12d r13d xmm0 + + movsd %xmm0, 128(%rsp,%r14,8) + +/* Process special inputs in loop */ + jmp L(SPECIAL_VALUES_LOOP) + # LOE rbx r15 r12d r13d +END(_ZGVeN8v_log2_skx) + + .section .rodata, "a" + .align 64 + +#ifdef __svml_dlog2_data_internal_avx512_typedef +typedef unsigned int VUINT32; +typedef struct { + __declspec(align(64)) VUINT32 Log_tbl[16][2]; + __declspec(align(64)) VUINT32 One[8][2]; + __declspec(align(64)) VUINT32 C075[8][2]; + __declspec(align(64)) VUINT32 poly_coeff9[8][2]; + __declspec(align(64)) VUINT32 poly_coeff8[8][2]; + __declspec(align(64)) VUINT32 poly_coeff7[8][2]; + __declspec(align(64)) VUINT32 poly_coeff6[8][2]; + __declspec(align(64)) VUINT32 poly_coeff5[8][2]; + __declspec(align(64)) VUINT32 poly_coeff4[8][2]; + __declspec(align(64)) VUINT32 poly_coeff3[8][2]; + __declspec(align(64)) VUINT32 poly_coeff2[8][2]; + __declspec(align(64)) VUINT32 poly_coeff1[8][2]; + } __svml_dlog2_data_internal_avx512; +#endif +__svml_dlog2_data_internal_avx512: + /*== Log_tbl ==*/ + .quad 0x0000000000000000 + .quad 0xbfb663f6fac91316 + .quad 0xbfc5c01a39fbd688 + .quad 0xbfcfbc16b902680a + .quad 0xbfd49a784bcd1b8b + .quad 0xbfd91bba891f1709 + .quad 0xbfdd6753e032ea0f + .quad 0xbfe0c10500d63aa6 + .quad 0x3fda8ff971810a5e + .quad 0x3fd6cb0f6865c8ea + .quad 0x3fd32bfee370ee68 + .quad 0x3fcf5fd8a9063e35 + .quad 0x3fc8a8980abfbd32 + .quad 0x3fc22dadc2ab3497 + .quad 0x3fb7d60496cfbb4c + .quad 0x3fa77394c9d958d5 + /*== One ==*/ + .align 64 + .quad 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000, 0x3ff0000000000000 + /*== C075 0.75 ==*/ + .align 64 + .quad 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000, 0x3fe8000000000000 + /*== poly_coeff9 ==*/ + .align 64 + .quad 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12, 0x3fc4904bda0e1d12 + /*== poly_coeff8 ==*/ + .align 64 + .quad 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce, 0xbfc71fb84deb5cce + /*== poly_coeff7 ==*/ + .align 64 + .quad 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613, 0x3fca617351818613 + /*== poly_coeff6 ==*/ + .align 64 + .quad 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c, 0xbfcec707e4e3144c + /*== poly_coeff5 ==*/ + .align 64 + .quad 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a, 0x3fd2776c5114d91a + /*== poly_coeff4 ==*/ + .align 64 + .quad 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d, 0xbfd71547653d0f8d + /*== poly_coeff3 ==*/ + .align 64 + .quad 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f, 0x3fdec709dc3a029f + /*== poly_coeff2 ==*/ + .align 64 + .quad 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4, 0xbfe71547652b82d4 + /*== poly_coeff1 ==*/ + .align 64 + .quad 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe, 0x3ff71547652b82fe + .align 64 + .type __svml_dlog2_data_internal_avx512,@object + .size __svml_dlog2_data_internal_avx512,.-__svml_dlog2_data_internal_avx512 |