Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1802

CVTPS2PI: Packed Single-FP to Packed INT32 Conversion
Opcode
0F,2D,/r
Operation: mm[31-0]
mm[63-32]
The CVTPS2PI instruction converts the lower 2 SP FP numbers in xmm/m64 to signed
Description:
32-bit integers in mm; when the conversion is inexact, the value rounded according to
the MXCSR is returned. If the converted result(s) is/are larger than the maximum
signed 32 bit value, the Integer Indefinite value (0x80000000) will be returned.
None.
FP Exceptions:
Invalid, Precision.
Numeric Exceptions:
Protected Mode Exceptions:
#GP(0) for an illegal memory operand effective address in the CS, DS, ES, FS or GS
segments; #SS(0) for an illegal address in the SS segment; #PF (fault-code) for a page
fault; #UD if CR0.EM = 1; #NM if TS bit in CR0 is set; #MF if there is a pending FPU
exception; #AC for unaligned memory reference. To enable #AC exceptions, three
conditions must be true(CR0.AM is set; EFLAGS.AC is set; current CPL is 3); #XM for an
unmasked SSE numeric exception (CR4.OSXMMEXCPT =1); #UD for an unmasked SSE
numeric exception (CR4.OSXMMEXCPT =0); #UD if CRCR4.OSFXSR(bit 9) = 0; #UD if
CPUID.XMM(EDX bit 25) = 0.
Real Address Mode Exceptions:
Interrupt 13 if any part of the operand would lie outside of the effective address space
from 0 to 0FFFFH; #UD if CR0.EM = 1; #NM if TS bit in CR0 is set; #MF if there is a
pending FPU exception; #XM for an unmasked SSE numeric exception
(CR4.OSXMMEXCPT =1); #UD for an unmasked SSE numeric exception
(CR4.OSXMMEXCPT =0); #UD if CRCR4.OSFXSR(bit 9) = 0; #UD if CPUID.XMM(EDX
bit 25) = 0.
Virtual 8086 Mode Exceptions:
Same exceptions as in Real Address Mode; #AC for unaligned memory reference if the
current privilege level is 3; #PF (fault-code) for a page fault.
Additional Itanium System Environment Exceptions
Itanium Reg Faults
Itanium Mem Faults VHPT Data Fault, Data TLB Fault, Alternate Data TLB Fault, Data
This instruction behaves identically to original MMX technology instructions, in the
Comments:
presence of x87-FP instructions, including:
4:500
Instruction
CVTPS2PI mm, xmm/m64
= (int) (xmm/m64[31-0]);
= (int) (xmm/m64[63-32]);
Disabled FP Register Fault if PSR.dfl is 1, NaT Register
Consumption Fault
Page Not Present Fault, Data NaT Page Consumption Abort, Data
Key Miss Fault, Data Key Permission Fault, Data Access Rights
Fault, Data Access Bit Fault
Description
Convert lower 2 SP FP from XMM/Mem to 2 32-bit signed
integers in MM using rounding specified by MXCSR.
Volume 4: IA-32 SSE Instruction Reference