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// Copyright 2024 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.
#include "textflag.h"
#define PosInf 0x7FF0000000000000
#define NaN 0x7FF8000000000001
#define NegInf 0xFFF0000000000000
TEXT ·archMax(SB),NOSPLIT,$0
MOVD x+0(FP), F0
MOVD y+8(FP), F1
FCLASSD F0, F2
FCLASSD F1, F3
// combine x and y categories together to judge
MOVV F2, R4
MOVV F3, R5
OR R5, R4
// +Inf special cases
AND $64, R4, R5
BNE R5, isPosInf
// NaN special cases
AND $2, R4, R5
BNE R5, isMaxNaN
// normal case
FMAXD F0, F1, F0
MOVD F0, ret+16(FP)
RET
isMaxNaN:
MOVV $NaN, R6
MOVV R6, ret+16(FP)
RET
isPosInf:
MOVV $PosInf, R6
MOVV R6, ret+16(FP)
RET
TEXT ·archMin(SB),NOSPLIT,$0
MOVD x+0(FP), F0
MOVD y+8(FP), F1
FCLASSD F0, F2
FCLASSD F1, F3
// combine x and y categories together to judge
MOVV F2, R4
MOVV F3, R5
OR R5, R4
// -Inf special cases
AND $4, R4, R5
BNE R5, isNegInf
// NaN special cases
AND $2, R4, R5
BNE R5, isMinNaN
// normal case
FMIND F0, F1, F0
MOVD F0, ret+16(FP)
RET
isMinNaN:
MOVV $NaN, R6
MOVV R6, ret+16(FP)
RET
isNegInf:
MOVV $NegInf, R6
MOVV R6, ret+16(FP)
RET
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