Editando: floor_386.s
// Copyright 2010 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" // func archCeil(x float64) float64 TEXT ·archCeil(SB),NOSPLIT,$0 FMOVD x+0(FP), F0 // F0=x FSTCW -2(SP) // save old Control Word MOVW -2(SP), AX ANDW $0xf3ff, AX ORW $0x0800, AX // Rounding Control set to +Inf MOVW AX, -4(SP) // store new Control Word FLDCW -4(SP) // load new Control Word FRNDINT // F0=Ceil(x) FLDCW -2(SP) // load old Control Word FMOVDP F0, ret+8(FP) RET // func archFloor(x float64) float64 TEXT ·archFloor(SB),NOSPLIT,$0 FMOVD x+0(FP), F0 // F0=x FSTCW -2(SP) // save old Control Word MOVW -2(SP), AX ANDW $0xf3ff, AX ORW $0x0400, AX // Rounding Control set to -Inf MOVW AX, -4(SP) // store new Control Word FLDCW -4(SP) // load new Control Word FRNDINT // F0=Floor(x) FLDCW -2(SP) // load old Control Word FMOVDP F0, ret+8(FP) RET // func archTrunc(x float64) float64 TEXT ·archTrunc(SB),NOSPLIT,$0 FMOVD x+0(FP), F0 // F0=x FSTCW -2(SP) // save old Control Word MOVW -2(SP), AX ORW $0x0c00, AX // Rounding Control set to truncate MOVW AX, -4(SP) // store new Control Word FLDCW -4(SP) // load new Control Word FRNDINT // F0=Trunc(x) FLDCW -2(SP) // load old Control Word FMOVDP F0, ret+8(FP) RET
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Kerym Chaeceran