Renesas M32R-FPU Manuel d'utilisateur télécharger pdf (Page 88)

3-50

M32R-FPU Software Manual (Rev.1.01)

INSTRUCTIONS

3.2 Instruction description

FMULFMUL

[Mnemonic]

FMUL Rdest,Rsrc1,Rsrc2

[Function]

Floating-point multiply

Rdest = Rsrc1 * Rsrc2 ;

[Description]

Multiply the floating-point single precision value stored in Rsrc1 by the floating-point single

precision value stored in Rsrc2 and store the results in Rdest. The result is rounded according to

the RM field of FPSR. The DN bit of FPSR handles the modification of denormalized numbers.

The condition bit (C) remains unchanged.

[EIT occurrence]

Floating-Point Exceptions (FPE)

• Unimplemented Operation Exception (UIPL)

• Invalid Operation Exception (IVLD)

• Overflow (OVF)

• Underflow (UDF)

• Inexact Exception (IXCT)

[Encoding]

floating-point Instructions

Floating-point multiply

[M32R-FPU Extended Instruction]

src11101 src20000 dest0001 00000000

FMUL Rdest,Rsrc1,Rsrc2

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 193 194

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Renesas M32R-FPU Manuel d'utilisateur Page 88