Your IP : 172.28.240.42
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !purego && (ppc64 || ppc64le)
#include "textflag.h"
// func addMulVVW1024(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW1024(SB), $0-32
MOVD $16, R22 // R22 = z_len
JMP addMulVVWx(SB)
// func addMulVVW1536(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW1536(SB), $0-32
MOVD $24, R22 // R22 = z_len
JMP addMulVVWx(SB)
// func addMulVVW2048(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW2048(SB), $0-32
MOVD $32, R22 // R22 = z_len
JMP addMulVVWx(SB)
TEXT addMulVVWx(SB), NOFRAME|NOSPLIT, $0
MOVD z+0(FP), R10 // R10 = z[]
MOVD x+8(FP), R8 // R8 = x[]
MOVD y+16(FP), R9 // R9 = y
MOVD R0, R3 // R3 will be the index register
CMP R0, R22
MOVD R0, R4 // R4 = c = 0
MOVD R22, CTR // Initialize loop counter
BEQ done
PCALIGN $16
loop:
MOVD (R8)(R3), R20 // Load x[i]
MOVD (R10)(R3), R21 // Load z[i]
MULLD R9, R20, R6 // R6 = Low-order(x[i]*y)
MULHDU R9, R20, R7 // R7 = High-order(x[i]*y)
ADDC R21, R6 // R6 = z0
ADDZE R7 // R7 = z1
ADDC R4, R6 // R6 = z0 + c + 0
ADDZE R7, R4 // c += z1
MOVD R6, (R10)(R3) // Store z[i]
ADD $8, R3
BC 16, 0, loop // bdnz
done:
MOVD R4, c+24(FP)
RET