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

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AMD64 Technology 26568—Rev. 3.05—September 2003 SUBPD Subtract Packed Double-Precision Floating- Point Subtracts each packed double-precision floating-point value in the second source operand from the corresponding packed double-precision floating-point value in the first source operand and writes the result of each subtraction in the corresponding quadword of the destination (first source). The first source/destination operand is an XMM register. The second source operand is another XMM register or 128-bit memory location. Mnemonic Opcode Description SUBPD xmm1, xmm2/mem128 66 0F 5C /r Subtracts packed double-precision floating-point values in an XMM register or 128-bit memory location from packed doubleprecision floating-point values in another XMM register and writes the result in the destination XMM register. Related Instructions SUBPS, SUBSD, SUBSS rFLAGS Affected None 127 64 63 0 127 64 63 0 subtract xmm1 xmm2/mem128 subtract 370 SUBPD subpd.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 M 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 Invalid-operation exception (IE) X X X There was an unmasked SIMD floating-point exception while CR4.OSXMMEXCPT = 1. See SIMD Floating-Point Exceptions, below, for details. SIMD Floating-Point Exceptions X X X X X X X X X A source operand was an SNaN value. +infinity was subtracted from +infinity. -infinity was subtracted from -infinity. SUBPD 371
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