float32reg_ppc64x.s

     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
    15  TEXT ·archFloat32ToReg(SB),NOSPLIT,$0-16
    16  	FMOVS	val+0(FP), F1
    17  	FMOVD	F1, ret+8(FP)
    18  	RET
    19  
    20  // Convert uint64->float32
    21  TEXT ·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  
    31
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