+++ /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_IDX_8__X3 LONG $0x1C120FF2; BYTE $0xC6 // MOVDDUP (SI)(AX*8), X3
-#define MOVDDUP_16_XPTR_IDX_8__X5 LONG $0x6C120FF2; WORD $0x10C6 // MOVDDUP 16(SI)(AX*8), X5
-#define MOVDDUP_32_XPTR_IDX_8__X7 LONG $0x7C120FF2; WORD $0x20C6 // MOVDDUP 32(SI)(AX*8), X7
-#define MOVDDUP_48_XPTR_IDX_8__X9 LONG $0x120F44F2; WORD $0xC64C; BYTE $0x30 // MOVDDUP 48(SI)(AX*8), X9
-
-#define MOVDDUP_XPTR_IIDX_8__X2 LONG $0x14120FF2; BYTE $0xD6 // MOVDDUP (SI)(DX*8), X2
-#define MOVDDUP_16_XPTR_IIDX_8__X4 LONG $0x64120FF2; WORD $0x10D6 // MOVDDUP 16(SI)(DX*8), X4
-#define MOVDDUP_32_XPTR_IIDX_8__X6 LONG $0x74120FF2; WORD $0x20D6 // MOVDDUP 32(SI)(DX*8), X6
-#define MOVDDUP_48_XPTR_IIDX_8__X8 LONG $0x120F44F2; WORD $0xD644; BYTE $0x30 // MOVDDUP 48(SI)(DX*8), 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 IDX AX
-#define I_IDX DX
-#define NEG1 X15
-#define P_NEG1 X14
-
-// func DotcUnitary(x, y []complex128) (sum complex128)
-TEXT ·DotcUnitary(SB), NOSPLIT, $0
- MOVQ x_base+0(FP), X_PTR // X_PTR = &x
- MOVQ y_base+24(FP), Y_PTR // Y_PTR = &y
- MOVQ x_len+8(FP), LEN // LEN = min( len(x), len(y) )
- CMPQ y_len+32(FP), LEN
- CMOVQLE y_len+32(FP), LEN
- PXOR SUM, SUM // sum = 0
- CMPQ LEN, $0 // if LEN == 0 { return }
- JE dot_end
- XORPS P_SUM, P_SUM // psum = 0
- MOVSD $(-1.0), NEG1
- SHUFPD $0, NEG1, NEG1 // { -1, -1 }
- XORQ IDX, IDX // i := 0
- MOVQ $1, I_IDX // j := 1
- MOVQ LEN, TAIL
- ANDQ $3, TAIL // TAIL = floor( TAIL / 4 )
- SHRQ $2, LEN // LEN = TAIL % 4
- JZ dot_tail // if LEN == 0 { goto dot_tail }
-
- MOVAPS NEG1, P_NEG1 // Copy NEG1 to P_NEG1 for pipelining
-
-dot_loop: // do {
- MOVDDUP_XPTR_IDX_8__X3 // X_(i+1) = { real(x[i], real(x[i]) }
- MOVDDUP_16_XPTR_IDX_8__X5
- MOVDDUP_32_XPTR_IDX_8__X7
- MOVDDUP_48_XPTR_IDX_8__X9
-
- MOVDDUP_XPTR_IIDX_8__X2 // X_i = { imag(x[i]), imag(x[i]) }
- MOVDDUP_16_XPTR_IIDX_8__X4
- MOVDDUP_32_XPTR_IIDX_8__X6
- MOVDDUP_48_XPTR_IIDX_8__X8
-
- // X_i = { -imag(x[i]), -imag(x[i]) }
- MULPD NEG1, X2
- MULPD P_NEG1, X4
- MULPD NEG1, X6
- MULPD P_NEG1, X8
-
- // X_j = { imag(y[i]), real(y[i]) }
- MOVUPS (Y_PTR)(IDX*8), X10
- MOVUPS 16(Y_PTR)(IDX*8), X11
- MOVUPS 32(Y_PTR)(IDX*8), X12
- MOVUPS 48(Y_PTR)(IDX*8), 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
-
- ADDQ $8, IDX // IDX += 8
- ADDQ $8, I_IDX // I_IDX += 8
- DECQ LEN
- JNZ dot_loop // } while --LEN > 0
- ADDPD P_SUM, SUM // sum += psum
- CMPQ TAIL, $0 // if TAIL == 0 { return }
- JE dot_end
-
-dot_tail: // do {
- MOVDDUP_XPTR_IDX_8__X3 // X_(i+1) = { real(x[i]) , real(x[i]) }
- MOVDDUP_XPTR_IIDX_8__X2 // X_i = { imag(x[i]) , imag(x[i]) }
- MULPD NEG1, X2 // X_i = { -imag(x[i]) , -imag(x[i]) }
- MOVUPS (Y_PTR)(IDX*8), 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 $2, IDX // IDX += 2
- ADDQ $2, I_IDX // I_IDX += 2
- DECQ TAIL
- JNZ dot_tail // } while --TAIL > 0
-
-dot_end:
- MOVUPS SUM, sum+48(FP)
- RET
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