+++ /dev/null
-// Copyright ©2016 The Gonum Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//+build !noasm,!appengine
-
-#include "textflag.h"
-
-#define MOVDDUP_XPTR__X3 LONG $0x1E120FF2 // MOVDDUP (SI), X3
-#define MOVDDUP_XPTR_INCX__X5 LONG $0x120F42F2; WORD $0x062C // MOVDDUP (SI)(R8*1), X5
-#define MOVDDUP_XPTR_INCX_2__X7 LONG $0x120F42F2; WORD $0x463C // MOVDDUP (SI)(R8*2), X7
-#define MOVDDUP_XPTR_INCx3X__X9 LONG $0x120F46F2; WORD $0x0E0C // MOVDDUP (SI)(R9*1), X9
-
-#define MOVDDUP_8_XPTR__X2 LONG $0x56120FF2; BYTE $0x08 // MOVDDUP 8(SI), X2
-#define MOVDDUP_8_XPTR_INCX__X4 LONG $0x120F42F2; WORD $0x0664; BYTE $0x08 // MOVDDUP 8(SI)(R8*1), X4
-#define MOVDDUP_8_XPTR_INCX_2__X6 LONG $0x120F42F2; WORD $0x4674; BYTE $0x08 // MOVDDUP 8(SI)(R8*2), X6
-#define MOVDDUP_8_XPTR_INCx3X__X8 LONG $0x120F46F2; WORD $0x0E44; BYTE $0x08 // MOVDDUP 8(SI)(R9*1), X8
-
-#define ADDSUBPD_X2_X3 LONG $0xDAD00F66 // ADDSUBPD X2, X3
-#define ADDSUBPD_X4_X5 LONG $0xECD00F66 // ADDSUBPD X4, X5
-#define ADDSUBPD_X6_X7 LONG $0xFED00F66 // ADDSUBPD X6, X7
-#define ADDSUBPD_X8_X9 LONG $0xD00F4566; BYTE $0xC8 // ADDSUBPD X8, X9
-
-#define X_PTR SI
-#define Y_PTR DI
-#define LEN CX
-#define TAIL BX
-#define SUM X0
-#define P_SUM X1
-#define INC_X R8
-#define INCx3_X R9
-#define INC_Y R10
-#define INCx3_Y R11
-
-// func DotuInc(x, y []complex128, n, incX, incY, ix, iy uintptr) (sum complex128)
-TEXT ·DotuInc(SB), NOSPLIT, $0
- MOVQ x_base+0(FP), X_PTR // X_PTR = &x
- MOVQ y_base+24(FP), Y_PTR // Y_PTR = &y
- MOVQ n+48(FP), LEN // LEN = n
- PXOR SUM, SUM // sum = 0
- CMPQ LEN, $0 // if LEN == 0 { return }
- JE dot_end
- MOVQ ix+72(FP), INC_X // INC_X = ix * sizeof(complex128)
- SHLQ $4, INC_X
- MOVQ iy+80(FP), INC_Y // INC_Y = iy * sizeof(complex128)
- SHLQ $4, INC_Y
- LEAQ (X_PTR)(INC_X*1), X_PTR // X_PTR = &(X_PTR[ix])
- LEAQ (Y_PTR)(INC_Y*1), Y_PTR // Y_PTR = &(Y_PTR[iy])
- MOVQ incX+56(FP), INC_X // INC_X = incX
- SHLQ $4, INC_X // INC_X *= sizeof(complex128)
- MOVQ incY+64(FP), INC_Y // INC_Y = incY
- SHLQ $4, INC_Y // INC_Y *= sizeof(complex128)
- MOVQ LEN, TAIL
- ANDQ $3, TAIL // LEN = LEN % 4
- SHRQ $2, LEN // LEN = floor( LEN / 4 )
- JZ dot_tail // if LEN <= 4 { goto dot_tail }
- PXOR P_SUM, P_SUM // psum = 0
- LEAQ (INC_X)(INC_X*2), INCx3_X // INCx3_X = 3 * incX * sizeof(complex128)
- LEAQ (INC_Y)(INC_Y*2), INCx3_Y // INCx3_Y = 3 * incY * sizeof(complex128)
-
-dot_loop: // do {
- MOVDDUP_XPTR__X3 // X_(i+1) = { real(x[i], real(x[i]) }
- MOVDDUP_XPTR_INCX__X5
- MOVDDUP_XPTR_INCX_2__X7
- MOVDDUP_XPTR_INCx3X__X9
-
- MOVDDUP_8_XPTR__X2 // X_i = { imag(x[i]), imag(x[i]) }
- MOVDDUP_8_XPTR_INCX__X4
- MOVDDUP_8_XPTR_INCX_2__X6
- MOVDDUP_8_XPTR_INCx3X__X8
-
- // X_j = { imag(y[i]), real(y[i]) }
- MOVUPS (Y_PTR), X10
- MOVUPS (Y_PTR)(INC_Y*1), X11
- MOVUPS (Y_PTR)(INC_Y*2), X12
- MOVUPS (Y_PTR)(INCx3_Y*1), X13
-
- // X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
- MULPD X10, X3
- MULPD X11, X5
- MULPD X12, X7
- MULPD X13, X9
-
- // X_j = { real(y[i]), imag(y[i]) }
- SHUFPD $0x1, X10, X10
- SHUFPD $0x1, X11, X11
- SHUFPD $0x1, X12, X12
- SHUFPD $0x1, X13, X13
-
- // X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
- MULPD X10, X2
- MULPD X11, X4
- MULPD X12, X6
- MULPD X13, X8
-
- // X_(i+1) = {
- // imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
- // real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
- // }
- ADDSUBPD_X2_X3
- ADDSUBPD_X4_X5
- ADDSUBPD_X6_X7
- ADDSUBPD_X8_X9
-
- // psum += result[i]
- ADDPD X3, SUM
- ADDPD X5, P_SUM
- ADDPD X7, SUM
- ADDPD X9, P_SUM
-
- LEAQ (X_PTR)(INC_X*4), X_PTR // X_PTR = &(X_PTR[incX*4])
- LEAQ (Y_PTR)(INC_Y*4), Y_PTR // Y_PTR = &(Y_PTR[incY*4])
-
- DECQ LEN
- JNZ dot_loop // } while --BX > 0
- ADDPD P_SUM, SUM // sum += psum
- CMPQ TAIL, $0 // if TAIL == 0 { return }
- JE dot_end
-
-dot_tail: // do {
- MOVDDUP_XPTR__X3 // X_(i+1) = { real(x[i], real(x[i]) }
- MOVDDUP_8_XPTR__X2 // X_i = { imag(x[i]), imag(x[i]) }
- MOVUPS (Y_PTR), X10 // X_j = { imag(y[i]) , real(y[i]) }
- MULPD X10, X3 // X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
- SHUFPD $0x1, X10, X10 // X_j = { real(y[i]) , imag(y[i]) }
- MULPD X10, X2 // X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
-
- // X_(i+1) = {
- // imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
- // real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
- // }
- ADDSUBPD_X2_X3
- ADDPD X3, SUM // sum += result[i]
- ADDQ INC_X, X_PTR // X_PTR += incX
- ADDQ INC_Y, Y_PTR // Y_PTR += incY
- DECQ TAIL // --TAIL
- JNZ dot_tail // } while TAIL > 0
-
-dot_end:
- MOVUPS SUM, sum+88(FP)
- RET
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