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dim_riscv64.s
// Copyright 2020 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" // Values returned from an FCLASS instruction. #define NegInf 0x001 #define PosInf 0x080 #define NaN 0x200 // func archMax(x, y float64) float64 TEXT ·archMax(SB),NOSPLIT,$0 MOVD x+0(FP), F0 MOVD y+8(FP), F1 FCLASSD F0, X5 FCLASSD F1, X6 // +Inf special cases MOV $PosInf, X7 BEQ X7, X5, isMaxX BEQ X7, X6, isMaxY // NaN special cases MOV $NaN, X7 BEQ X7, X5, isMaxX BEQ X7, X6, isMaxY // normal case FMAXD F0, F1, F0 MOVD F0, ret+16(FP) RET isMaxX: // return x MOVD F0, ret+16(FP) RET isMaxY: // return y MOVD F1, ret+16(FP) RET // func archMin(x, y float64) float64 TEXT ·archMin(SB),NOSPLIT,$0 MOVD x+0(FP), F0 MOVD y+8(FP), F1 FCLASSD F0, X5 FCLASSD F1, X6 // -Inf special cases MOV $NegInf, X7 BEQ X7, X5, isMinX BEQ X7, X6, isMinY // NaN special cases MOV $NaN, X7 BEQ X7, X5, isMinX BEQ X7, X6, isMinY // normal case FMIND F0, F1, F0 MOVD F0, ret+16(FP) RET isMinX: // return x MOVD F0, ret+16(FP) RET isMinY: // return y MOVD F1, ret+16(FP) RET
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