Power ISA™ Version 2.03 - Power.org

Version 2.03
Vector Round to Single-Precision Integer
toward Minus Infinity
VX-form
Vector Round to Single-Precision Integer
Nearest
VX-form
vrfim
VRT,VRB
vrfin
VRT,VRB
4 VRT /// VRB 714
0 6 11 16 21 31
do i=0 to 127 by 32
VRT 0:31 RoundToSPIntFloor( (VRB) 0:31 )
For each vector element i from 0 to 3, do the following.
Single-precision floating-point element i in VRB is
rounded to a single-precision floating-point integer
using the rounding mode Round toward -Infinity.
The result is placed into the corresponding word
element i of VRT.
Special Registers Altered:
None
4 VRT /// VRB 522
0 6 11 16 21 31
do i=0 to 127 by 32
VRT 0:31 RoundToSPIntNear( (VRB) 0:31 )
For each vector element i from 0 to 3, do the following.
Single-precision floating-point element i in VRB is
rounded to a single-precision floating-point integer
using the rounding mode Round to Nearest.
The result is placed into the corresponding word
element i of VRT.
Special Registers Altered:
None
Programming Note
The Vector Convert To Fixed-Point Word instructions
support only the rounding mode Round
toward Zero. A floating-point number can be converted
to a fixed-point integer using any of the other
three rounding modes by executing the appropriate
Vector Round to Floating-Point Integer instruction
before the Vector Convert To Fixed-Point Word
instruction.
Programming Note
The fixed-point integers used by the Vector Convert
instructions can be interpreted as consisting of
32-UIM integer bits followed by UIM fraction bits.
Vector Round to Single-Precision Integer
toward Positive Infinity VX-form
Vector Round to Single-Precision Integer
toward Zero
VX-form
vrfip
VRT,VRB
vrfiz
VRT,VRB
4 VRT /// VRB 650
0 6 11 16 21 31
do i=0 to 127 by 32
VRT 0:31 RoundToSPIntCeil( (VRB) 0:31 )
For each vector element i from 0 to 3, do the following.
Single-precision floating-point element i in VRB is
rounded to a single-precision floating-point integer
using the rounding mode Round toward +Infinity.
The result is placed into the corresponding word
element i of VRT.
Special Registers Altered:
None
4 VRT /// VRB 586
0 6 11 16 21 31
do i=0 to 127 by 32
VRT 0:31 RoundToSPIntTrunc( (VRB) 0:31 )
For each vector element i from 0 to 3, do the following.
Single-precision floating-point element i in VRB is
rounded to a single-precision floating-point integer
using the rounding mode Round toward Zero.
The result is placed into the corresponding word
element i of VRT.
Special Registers Altered:
None
188
Power ISA -- Book I