float32reg_ppc64x.s

Documentation: reflect

     1// Copyright 2021 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//go:build ppc64 || ppc64le
     6
     7#include "textflag.h"
     8
     9// On PPC64, the float32 becomes a float64
    10// when loaded in a register, different from
    11// other platforms. These functions are
    12// needed to ensure correct conversions on PPC64.
    13
    14// Convert float32->uint64
    15TEXT ·archFloat32ToReg(SB),NOSPLIT,$0-16
    16	FMOVS	val+0(FP), F1
    17	FMOVD	F1, ret+8(FP)
    18	RET
    19
    20// Convert uint64->float32
    21TEXT ·archFloat32FromReg(SB),NOSPLIT,$0-12
    22	FMOVD	reg+0(FP), F1
    23	// Normally a float64->float32 conversion
    24	// would need rounding, but that is not needed
    25	// here since the uint64 was originally converted
    26	// from float32, and should be avoided to
    27	// preserve SNaN values.
    28	FMOVS	F1, ret+8(FP)
    29	RET
    30
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