Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1849

RSQRTPS: Packed Single-FP Square Root Reciprocal
Opcode
0F,52,/r
Operation: xmm1[31-0]
xmm1[63-32]
xmm1[95-64]
xmm1[127-96] = approx (1.0/sqrt(xmm2/m128[127-96]));
RSQRTPS returns an approximation of the reciprocal of the square root of the SP FP
Description:
numbers from xmm2/m128. The relative error for this approximation is Error, which
satisfies:
|Error| <= 1.5x2
General protection exception if not aligned on 16-byte boundary, regardless of
FP Exceptions:
segment.
None.
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; #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; #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; #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
RSQRTPS is not affected by the rounding control in MXCSR. Denormal inputs are
Comments:
treated as zeros (of the same sign).
Volume 4: IA-32 SSE Instruction Reference
Instruction
RSQRTPS xmm1, xmm2/m128
= approx (1.0/sqrt(xmm2/m128[31-0]));
= approx (1.0/sqrt(xmm2/m128[63-32]));
= approx (1.0/sqrt(xmm2/m128[95-64]));
-12
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
Return a packed approximation of the square root of the
reciprocal of XMM2/Mem.
4:547