1 // Copyright ©2016 The Gonum Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 //+build !noasm,!appengine
9 #define MOVDDUP_XPTR__X3 LONG $0x1E120FF2 // MOVDDUP (SI), X3
10 #define MOVDDUP_XPTR_INCX__X5 LONG $0x120F42F2; WORD $0x062C // MOVDDUP (SI)(R8*1), X5
11 #define MOVDDUP_XPTR_INCX_2__X7 LONG $0x120F42F2; WORD $0x463C // MOVDDUP (SI)(R8*2), X7
12 #define MOVDDUP_XPTR_INCx3X__X9 LONG $0x120F46F2; WORD $0x0E0C // MOVDDUP (SI)(R9*1), X9
14 #define MOVDDUP_8_XPTR__X2 LONG $0x56120FF2; BYTE $0x08 // MOVDDUP 8(SI), X2
15 #define MOVDDUP_8_XPTR_INCX__X4 LONG $0x120F42F2; WORD $0x0664; BYTE $0x08 // MOVDDUP 8(SI)(R8*1), X4
16 #define MOVDDUP_8_XPTR_INCX_2__X6 LONG $0x120F42F2; WORD $0x4674; BYTE $0x08 // MOVDDUP 8(SI)(R8*2), X6
17 #define MOVDDUP_8_XPTR_INCx3X__X8 LONG $0x120F46F2; WORD $0x0E44; BYTE $0x08 // MOVDDUP 8(SI)(R9*1), X8
19 #define ADDSUBPD_X2_X3 LONG $0xDAD00F66 // ADDSUBPD X2, X3
20 #define ADDSUBPD_X4_X5 LONG $0xECD00F66 // ADDSUBPD X4, X5
21 #define ADDSUBPD_X6_X7 LONG $0xFED00F66 // ADDSUBPD X6, X7
22 #define ADDSUBPD_X8_X9 LONG $0xD00F4566; BYTE $0xC8 // ADDSUBPD X8, X9
35 // func DotuInc(x, y []complex128, n, incX, incY, ix, iy uintptr) (sum complex128)
36 TEXT ·DotuInc(SB), NOSPLIT, $0
37 MOVQ x_base+0(FP), X_PTR // X_PTR = &x
38 MOVQ y_base+24(FP), Y_PTR // Y_PTR = &y
39 MOVQ n+48(FP), LEN // LEN = n
40 PXOR SUM, SUM // sum = 0
41 CMPQ LEN, $0 // if LEN == 0 { return }
43 MOVQ ix+72(FP), INC_X // INC_X = ix * sizeof(complex128)
45 MOVQ iy+80(FP), INC_Y // INC_Y = iy * sizeof(complex128)
47 LEAQ (X_PTR)(INC_X*1), X_PTR // X_PTR = &(X_PTR[ix])
48 LEAQ (Y_PTR)(INC_Y*1), Y_PTR // Y_PTR = &(Y_PTR[iy])
49 MOVQ incX+56(FP), INC_X // INC_X = incX
50 SHLQ $4, INC_X // INC_X *= sizeof(complex128)
51 MOVQ incY+64(FP), INC_Y // INC_Y = incY
52 SHLQ $4, INC_Y // INC_Y *= sizeof(complex128)
54 ANDQ $3, TAIL // LEN = LEN % 4
55 SHRQ $2, LEN // LEN = floor( LEN / 4 )
56 JZ dot_tail // if LEN <= 4 { goto dot_tail }
57 PXOR P_SUM, P_SUM // psum = 0
58 LEAQ (INC_X)(INC_X*2), INCx3_X // INCx3_X = 3 * incX * sizeof(complex128)
59 LEAQ (INC_Y)(INC_Y*2), INCx3_Y // INCx3_Y = 3 * incY * sizeof(complex128)
62 MOVDDUP_XPTR__X3 // X_(i+1) = { real(x[i], real(x[i]) }
64 MOVDDUP_XPTR_INCX_2__X7
65 MOVDDUP_XPTR_INCx3X__X9
67 MOVDDUP_8_XPTR__X2 // X_i = { imag(x[i]), imag(x[i]) }
68 MOVDDUP_8_XPTR_INCX__X4
69 MOVDDUP_8_XPTR_INCX_2__X6
70 MOVDDUP_8_XPTR_INCx3X__X8
72 // X_j = { imag(y[i]), real(y[i]) }
74 MOVUPS (Y_PTR)(INC_Y*1), X11
75 MOVUPS (Y_PTR)(INC_Y*2), X12
76 MOVUPS (Y_PTR)(INCx3_Y*1), X13
78 // X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
84 // X_j = { real(y[i]), imag(y[i]) }
90 // X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
97 // imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
98 // real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
111 LEAQ (X_PTR)(INC_X*4), X_PTR // X_PTR = &(X_PTR[incX*4])
112 LEAQ (Y_PTR)(INC_Y*4), Y_PTR // Y_PTR = &(Y_PTR[incY*4])
115 JNZ dot_loop // } while --BX > 0
116 ADDPD P_SUM, SUM // sum += psum
117 CMPQ TAIL, $0 // if TAIL == 0 { return }
121 MOVDDUP_XPTR__X3 // X_(i+1) = { real(x[i], real(x[i]) }
122 MOVDDUP_8_XPTR__X2 // X_i = { imag(x[i]), imag(x[i]) }
123 MOVUPS (Y_PTR), X10 // X_j = { imag(y[i]) , real(y[i]) }
124 MULPD X10, X3 // X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
125 SHUFPD $0x1, X10, X10 // X_j = { real(y[i]) , imag(y[i]) }
126 MULPD X10, X2 // X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
129 // imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
130 // real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
133 ADDPD X3, SUM // sum += result[i]
134 ADDQ INC_X, X_PTR // X_PTR += incX
135 ADDQ INC_Y, Y_PTR // Y_PTR += incY
137 JNZ dot_tail // } while TAIL > 0
140 MOVUPS SUM, sum+88(FP)