root/src/pkg/math/mod_386.s

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// 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 "../../cmd/ld/textflag.h"

// func Mod(x, y float64) float64
TEXT ·Mod(SB),NOSPLIT,$0
        FMOVD   y+8(FP), F0  // F0=y
        FMOVD   x+0(FP), F0  // F0=x, F1=y
        FPREM                // F0=reduced_x, F1=y
        FSTSW   AX           // AX=status word
        ANDW    $0x0400, AX
        JNE     -3(PC)       // jump if reduction incomplete
        FMOVDP  F0, F1       // F0=x-q*y
        FMOVDP  F0, ret+16(FP)
        RET
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