github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/math/big/arith_riscv64.s (about)

     1  // Copyright 2020 The Go 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.
     4  
     5  //go:build !math_big_pure_go && riscv64
     6  // +build !math_big_pure_go,riscv64
     7  
     8  #include "textflag.h"
     9  
    10  // This file provides fast assembly versions for the elementary
    11  // arithmetic operations on vectors implemented in arith.go.
    12  
    13  // func mulWW(x, y Word) (z1, z0 Word)
    14  TEXT ·mulWW(SB),NOSPLIT,$0
    15  	MOV	x+0(FP), X5
    16  	MOV	y+8(FP), X6
    17  	MULHU	X5, X6, X7
    18  	MUL	X5, X6, X8
    19  	MOV	X7, z1+16(FP)
    20  	MOV	X8, z0+24(FP)
    21  	RET
    22  
    23  
    24  TEXT ·addVV(SB),NOSPLIT,$0
    25  	JMP ·addVV_g(SB)
    26  
    27  TEXT ·subVV(SB),NOSPLIT,$0
    28  	JMP ·subVV_g(SB)
    29  
    30  TEXT ·addVW(SB),NOSPLIT,$0
    31  	JMP ·addVW_g(SB)
    32  
    33  TEXT ·subVW(SB),NOSPLIT,$0
    34  	JMP ·subVW_g(SB)
    35  
    36  TEXT ·shlVU(SB),NOSPLIT,$0
    37  	JMP ·shlVU_g(SB)
    38  
    39  TEXT ·shrVU(SB),NOSPLIT,$0
    40  	JMP ·shrVU_g(SB)
    41  
    42  TEXT ·mulAddVWW(SB),NOSPLIT,$0
    43  	JMP ·mulAddVWW_g(SB)
    44  
    45  TEXT ·addMulVVW(SB),NOSPLIT,$0
    46  	JMP ·addMulVVW_g(SB)
    47