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

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AMD64 Technology 26568—Rev. 3.05—September 2003 MXCSR Flags Affected None Exceptions Exception Real Invalid opcode, #UD X X 316 PSUBSB Virtual 8086 Protected Cause of Exception 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. X X X The operating-system FXSAVE/FXRSTOR support bit (OSFXSR) of CR4 is cleared to 0. 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.
26568—Rev. 3.05—September 2003 AMD64 Technology PSUBSW Packed Subtract Signed With Saturation Words Subtracts each packed 16-bit signed integer value in the second source operand from the corresponding packed 16-bit signed integer in the first source operand and writes the signed integer result of each subtraction in the corresponding word of the destination (first source). The first source/destination and source operands are an XMM register and another XMM register or 128-bit memory location. Mnemonic Opcode Description PSUBSW xmm1, xmm2/mem128 66 0F E9 /r Subtracts packed 16-bit signed integer values in an XMM register or 128-bit memory location from packed 16-bit integer values in another XMM register and writes the result in the destination XMM register. For each packed value in the destination, if the value is larger than the largest signed 16-bit integer, it is saturated to 7FFFh, and if the value is smaller than the smallest signed 16-bit integer, it is saturated to 8000h. Related Instructions PSUBB, PSUBD, PSUBQ, PSUBSB, PSUBUSB, PSUBUSW, PSUBW rFLAGS Affected None subtract saturate xmm1 xmm2/mem128 . . . . . . 127 112 111 96 95 80 79 64 63 48 47 32 31 16 15 0 . . . . . . subtract saturate 127 112 111 96 95 80 79 64 63 48 47 32 31 16 15 0 . . . . . . psubsw-128.eps PSUBSW 317
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