1 // Copyright 2016 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 #define PosInf 0x7FF0000000000000 8 #define NaN 0x7FF8000000000001 9 #define NegInf 0xFFF0000000000000 10 11 // func Max(x, y float64) float64 12 TEXT Max(SB),NOSPLIT,$0 13 // +Inf special cases 14 MOVD $PosInf, R0 15 MOVD x+0(FP), R1 16 CMP R0, R1 17 BEQ isPosInf 18 MOVD y+8(FP), R2 19 CMP R0, R2 20 BEQ isPosInf 21 // normal case 22 FMOVD R1, F0 23 FMOVD R2, F1 24 FMAXD F0, F1, F0 25 FMOVD F0, ret+16(FP) 26 RET 27 isPosInf: // return +Inf 28 MOVD R0, ret+16(FP) 29 RET 30 31 // func Min(x, y float64) float64 32 TEXT Min(SB),NOSPLIT,$0 33 // -Inf special cases 34 MOVD $NegInf, R0 35 MOVD x+0(FP), R1 36 CMP R0, R1 37 BEQ isNegInf 38 MOVD y+8(FP), R2 39 CMP R0, R2 40 BEQ isNegInf 41 // normal case 42 FMOVD R1, F0 43 FMOVD R2, F1 44 FMIND F0, F1, F0 45 FMOVD F0, ret+16(FP) 46 RET 47 isNegInf: // return -Inf 48 MOVD R0, ret+16(FP) 49 RET 50
