dim_riscv64.s

Documentation: math

     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#include "textflag.h"
     6
     7// Values returned from an FCLASS instruction.
     8#define	NegInf	0x001
     9#define	PosInf	0x080
    10#define	NaN	0x200
    11
    12// func archMax(x, y float64) float64
    13TEXT ·archMax(SB),NOSPLIT,$0
    14	MOVD	x+0(FP), F0
    15	MOVD	y+8(FP), F1
    16	FCLASSD	F0, X5
    17	FCLASSD	F1, X6
    18
    19	// +Inf special cases
    20	MOV	$PosInf, X7
    21	BEQ	X7, X5, isMaxX
    22	BEQ	X7, X6, isMaxY
    23
    24	// NaN special cases
    25	MOV	$NaN, X7
    26	BEQ	X7, X5, isMaxX
    27	BEQ	X7, X6, isMaxY
    28
    29	// normal case
    30	FMAXD	F0, F1, F0
    31	MOVD	F0, ret+16(FP)
    32	RET
    33
    34isMaxX: // return x
    35	MOVD	F0, ret+16(FP)
    36	RET
    37
    38isMaxY: // return y
    39	MOVD	F1, ret+16(FP)
    40	RET
    41
    42// func archMin(x, y float64) float64
    43TEXT ·archMin(SB),NOSPLIT,$0
    44	MOVD	x+0(FP), F0
    45	MOVD	y+8(FP), F1
    46	FCLASSD	F0, X5
    47	FCLASSD	F1, X6
    48
    49	// -Inf special cases
    50	MOV	$NegInf, X7
    51	BEQ	X7, X5, isMinX
    52	BEQ	X7, X6, isMinY
    53
    54	// NaN special cases
    55	MOV	$NaN, X7
    56	BEQ	X7, X5, isMinX
    57	BEQ	X7, X6, isMinY
    58
    59	// normal case
    60	FMIND	F0, F1, F0
    61	MOVD	F0, ret+16(FP)
    62	RET
    63
    64isMinX: // return x
    65	MOVD	F0, ret+16(FP)
    66	RET
    67
    68isMinY: // return y
    69	MOVD	F1, ret+16(FP)
    70	RET
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