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135 lines
4.3 KiB
ArmAsm
135 lines
4.3 KiB
ArmAsm
// Copyright ©2016 The Gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//+build !noasm,!appengine,!safe
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#include "textflag.h"
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// MOVDDUP X2, X3
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#define MOVDDUP_X2_X3 BYTE $0xF2; BYTE $0x0F; BYTE $0x12; BYTE $0xDA
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// MOVDDUP X4, X5
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#define MOVDDUP_X4_X5 BYTE $0xF2; BYTE $0x0F; BYTE $0x12; BYTE $0xEC
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// MOVDDUP X6, X7
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#define MOVDDUP_X6_X7 BYTE $0xF2; BYTE $0x0F; BYTE $0x12; BYTE $0xFE
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// MOVDDUP X8, X9
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#define MOVDDUP_X8_X9 BYTE $0xF2; BYTE $0x45; BYTE $0x0F; BYTE $0x12; BYTE $0xC8
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// ADDSUBPD X2, X3
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#define ADDSUBPD_X2_X3 BYTE $0x66; BYTE $0x0F; BYTE $0xD0; BYTE $0xDA
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// ADDSUBPD X4, X5
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#define ADDSUBPD_X4_X5 BYTE $0x66; BYTE $0x0F; BYTE $0xD0; BYTE $0xEC
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// ADDSUBPD X6, X7
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#define ADDSUBPD_X6_X7 BYTE $0x66; BYTE $0x0F; BYTE $0xD0; BYTE $0xFE
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// ADDSUBPD X8, X9
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#define ADDSUBPD_X8_X9 BYTE $0x66; BYTE $0x45; BYTE $0x0F; BYTE $0xD0; BYTE $0xC8
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// func AxpyInc(alpha complex128, x, y []complex128, n, incX, incY, ix, iy uintptr)
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TEXT ·AxpyInc(SB), NOSPLIT, $0
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MOVQ x_base+16(FP), SI // SI = &x
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MOVQ y_base+40(FP), DI // DI = &y
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MOVQ n+64(FP), CX // CX = n
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CMPQ CX, $0 // if n==0 { return }
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JE axpyi_end
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MOVQ ix+88(FP), R8 // R8 = ix // Load the first index
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SHLQ $4, R8 // R8 *= sizeof(complex128)
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MOVQ iy+96(FP), R9 // R9 = iy
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SHLQ $4, R9 // R9 *= sizeof(complex128)
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LEAQ (SI)(R8*1), SI // SI = &(x[ix])
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LEAQ (DI)(R9*1), DI // DI = &(y[iy])
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MOVQ DI, DX // DX = DI // Separate Read/Write pointers
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MOVQ incX+72(FP), R8 // R8 = incX
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SHLQ $4, R8 // R8 *= sizeof(complex128)
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MOVQ incY+80(FP), R9 // R9 = iy
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SHLQ $4, R9 // R9 *= sizeof(complex128)
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MOVUPS alpha+0(FP), X0 // X0 = { imag(a), real(a) }
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MOVAPS X0, X1
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SHUFPD $0x1, X1, X1 // X1 = { real(a), imag(a) }
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MOVAPS X0, X10 // Copy X0 and X1 for pipelining
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MOVAPS X1, X11
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MOVQ CX, BX
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ANDQ $3, CX // CX = n % 4
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SHRQ $2, BX // BX = floor( n / 4 )
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JZ axpyi_tail // if BX == 0 { goto axpyi_tail }
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axpyi_loop: // do {
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MOVUPS (SI), X2 // X_i = { imag(x[i]), real(x[i]) }
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MOVUPS (SI)(R8*1), X4
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LEAQ (SI)(R8*2), SI // SI = &(SI[incX*2])
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MOVUPS (SI), X6
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MOVUPS (SI)(R8*1), X8
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// X_(i+1) = { real(x[i], real(x[i]) }
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MOVDDUP_X2_X3
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MOVDDUP_X4_X5
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MOVDDUP_X6_X7
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MOVDDUP_X8_X9
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// X_i = { imag(x[i]), imag(x[i]) }
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SHUFPD $0x3, X2, X2
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SHUFPD $0x3, X4, X4
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SHUFPD $0x3, X6, X6
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SHUFPD $0x3, X8, X8
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// X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
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// X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
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MULPD X1, X2
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MULPD X0, X3
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MULPD X11, X4
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MULPD X10, X5
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MULPD X1, X6
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MULPD X0, X7
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MULPD X11, X8
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MULPD X10, X9
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// X_(i+1) = {
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// imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
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// real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
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// }
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ADDSUBPD_X2_X3
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ADDSUBPD_X4_X5
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ADDSUBPD_X6_X7
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ADDSUBPD_X8_X9
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// X_(i+1) = { imag(result[i]) + imag(y[i]), real(result[i]) + real(y[i]) }
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ADDPD (DX), X3
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ADDPD (DX)(R9*1), X5
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LEAQ (DX)(R9*2), DX // DX = &(DX[incY*2])
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ADDPD (DX), X7
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ADDPD (DX)(R9*1), X9
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MOVUPS X3, (DI) // dst[i] = X_(i+1)
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MOVUPS X5, (DI)(R9*1)
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LEAQ (DI)(R9*2), DI
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MOVUPS X7, (DI)
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MOVUPS X9, (DI)(R9*1)
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LEAQ (SI)(R8*2), SI // SI = &(SI[incX*2])
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LEAQ (DX)(R9*2), DX // DX = &(DX[incY*2])
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LEAQ (DI)(R9*2), DI // DI = &(DI[incY*2])
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DECQ BX
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JNZ axpyi_loop // } while --BX > 0
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CMPQ CX, $0 // if CX == 0 { return }
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JE axpyi_end
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axpyi_tail: // do {
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MOVUPS (SI), X2 // X_i = { imag(x[i]), real(x[i]) }
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MOVDDUP_X2_X3 // X_(i+1) = { real(x[i], real(x[i]) }
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SHUFPD $0x3, X2, X2 // X_i = { imag(x[i]), imag(x[i]) }
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MULPD X1, X2 // X_i = { real(a) * imag(x[i]), imag(a) * imag(x[i]) }
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MULPD X0, X3 // X_(i+1) = { imag(a) * real(x[i]), real(a) * real(x[i]) }
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// X_(i+1) = {
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// imag(result[i]): imag(a)*real(x[i]) + real(a)*imag(x[i]),
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// real(result[i]): real(a)*real(x[i]) - imag(a)*imag(x[i])
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// }
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ADDSUBPD_X2_X3
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// X_(i+1) = { imag(result[i]) + imag(y[i]), real(result[i]) + real(y[i]) }
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ADDPD (DI), X3
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MOVUPS X3, (DI) // y[i] = X_i
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ADDQ R8, SI // SI = &(SI[incX])
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ADDQ R9, DI // DI = &(DI[incY])
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LOOP axpyi_tail // } while --CX > 0
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axpyi_end:
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RET
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