AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

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AMD64 Technology 26568—Rev. 3.05—September 2003 CVTTPD2DQ Convert Packed Double-Precision Floating-Point to Packed Doubleword Integers, Truncated Converts two packed double-precision floating-point values in an XMM register or a 128-bit memory location to two packed 32-bit signed integer values and writes the converted values in the low-order 64 bits of another XMM register. The high-order 64 bits of the destination XMM register are cleared to all 0s. Mnemonic Opcode Description CVTTPD2DQ xmm1, xmm2/mem128 66 0F E6 /r Converts packed double-precision floating-point values in an XMM register or 128-bit memory location to packed doubleword integer values in the destination XMM register. Inexact results are truncated. If the result of the conversion is an inexact value, the value is truncated (rounded toward zero). If the floating-point value is a NaN, infinity, or if the result of the conversion is larger than the maximum signed doubleword (–2 31 to +2 31 –1), the instruction returns the 32-bit indefinite integer value (8000_0000h) when the invalidoperation exception (IE) is masked. Related Instructions CVTDQ2PD, CVTPD2DQ, CVTPD2PI, CVTPI2PD, CVTSD2SI, CVTSI2SD, CVTTPD2PI, CVTTSD2SI rFLAGS Affected None xmm1 xmm2/mem128 127 64 63 32 31 0 0 84 CVTTPD2DQ 127 64 63 0 convert convert cvttpd2dq.eps
26568—Rev. 3.05—September 2003 AMD64 Technology MXCSR Flags Affected FZ RC PM UM OM ZM DM IM DAZ PE UE OE ZE DE IE Exceptions M M 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Note: A flag that may be set to one or cleared to zero is M (modified). Unaffected flags are blank. Exception Real Invalid opcode, #UD X X X Virtual 8086 Protected Cause of Exception X X X X X X The SSE2 instructions are not supported, as indicated by bit 26 of CPUID standard function 1. The emulate bit (EM) of CR0 was set to 1. The operating-system FXSAVE/FXRSTOR support bit (OSFXSR) of CR4 was cleared to 0. X X X There was an unmasked SIMD floating-point exception while CR4.OSXMMEXCPT = 0. See SIMD Floating-Point Exceptions, below, for details. Device not available, #NM X X X The task-switch bit (TS) of CR0 was set to 1. Stack, #SS X X X A memory address exceeded the stack segment limit or was non-canonical. General protection, #GP X X X X A memory address exceeded a data segment limit or was non-canonical. A null data segment was used to reference memory. X X X The memory operand was not aligned on a 16-byte boundary. Page fault, #PF X X A page fault resulted from the execution of the instruction. SIMD Floating-Point Exception, #XF X X X There was an unmasked SIMD floating-point exception while CR4.OSXMMEXCPT = 1. See SIMD Floating-Point Exceptions, below, for details. CVTTPD2DQ 85
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