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Fstsw ax

WebMar 27, 2024 · I think there was some intent to make it easy / mechanical to port 8080 asm source to 8086, so this may explain it. (You or I should ask on retrocomputing about this … WebFeb 1, 2024 · fstsw ax ;ax := fpu status register: and eax, 0100011100000000B ;take only condition code flags: cmp eax, 0000000000000000B ;is st0 > source ? je example_11_greater: cmp eax, 0000000100000000B ;is st0 < source ? je example_11_less: cmp eax, 0100000000000000B ;is st0 = source ? je example_11_equal

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WebJul 16, 1999 · 17.3 FCOM + FSTSW AX ----- The usual way of doing floating point comparisons is: FLD [a] FCOMP FSTSW AX SAHF JB ASmallerThanB You may improve this code by using FNSTSW AX rather than FSTSW AX and test AH directly rather than using the non-pairable SAHF. WebApr 25, 2000 · fstsw ax.IF (ah & FP_EQUALTO) ; if EQUAL; We have an integer! Lucky day. Go convert it into a temp buffer. call FloatToBCD. mov eax, 17 mov ecx, [iExp] sub eax, ecx inc ecx lea esi, [szTemp][eax]; The off-by-one order of magnitude problem below can hit us here. ; We just trim off the possible leading zero..IF (byte ptr [esi] == '0') inc esi dec ... graystone eye in lincolnton nc https://smiths-ca.com

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WebfStSW AX ; Store Status Word SAHF ; Shift AH to the Flag register. Structures Definition. C# or C++ class w/o methods Stmt does not create a variable or allocate memory (like a public class) Template to group related variables like arrays (don't need to have same data type BUT field names must be unique) WebFSTSW stores the FPU status word into AX or into a 2-byte memory area. FNSTSW does the same thing as FSTSW, without first waiting for pending floating-point exceptions to … WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. cholera outbreak in nigeria 2022

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Fstsw ax

FSTSW/FNSTSW—Store x87 FPU Status Word

WebThe FSTSW AX instruction is the only available instruction to the coprocessor that allows direct communication between coprocessor and microprocessor through the AX register. … Webfstsw ax fnstsw ax fstsw mem_16 fnstsw mem_16. These instructions store the FPU status register (see "The FPU Status Register" on page 785) into a 16 bit memory location or the ax register. These instructions are unusual in the sense that they can copy an FPU value into one of the 80x86 general purpose registers.

Fstsw ax

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WebWrite an HLA Assembly language program that implements the following function: procedure grader ( percentage : real32 ); @nodisplay; @noframe; Your function should return in AL the converted character value, as shown in the chart above. (Hint: Since the run-stack doesn't allow for a byte-sized argument to be pushed and popped, you will need to ...

WebDocumentation Home > IA-32 Assembly Language Reference Manual > Chapter 2 Instruction-Set Mapping > Processor Control Instructions > Store Status Word (fstsw, … WebThe FSTSW instruction checks for and handles pending unmasked floating-point exceptions before storing the status word; the FNSTSW instruction does not. The FNSTSW AX form …

WebThe FNSTSW AX form of the instruction is used primarily in conditional branching (for instance, after an FPU comparison instruction or an FPREM, FPREM1, or FXAM … WebOn the 286 and later, there was a special path between the two to support fnstsw ax, copying the status word into ax; see How is FSTSW AX implemented on the 80286/80287?. Since they had set up the bits of the status word to match the flags bits, you could then use sahf (which I believe originally existed for porting 8080 programs) to copy the ...

Webfcom source fstsw ax test ah,41 (C3 and C0) jpe short 0042F251 Jump if ST(0) >= source. fcomp source fstsw ax test ah,5 (C2 and C0) jpe short 0042EE20 or. fcom source fstsw ax test ah,1 (C0) je short 0042F248 Divide by constant. Divide by 2. About. Decompile the code of lf2 Resources. Readme Stars. 4 stars Watchers. 3 watching

WebThe FSTSW instruction checks for and handles pending unmasked floating-point exceptions before storing the status word; the FNSTSW instruction does not. The FNSTSW AX form … cholera outbreak in nepal 2022WebFSTSW ax. SAHF. JZ label. 为什么如此呢，因为用如上指令将状态字存入EFLAGS,C0正好置于CF位，C3正好置于ZF位. 5、环境及系统控制类. FLDCW Load control word. FSTCW Store control word. FSTSW Store status word. FLDENV Load environment block. FSTENV Store environment block. FSAVE Save coprocessor state. FRSTOR ... graystone eye hickory nc faxhttp://www.masmforum.com/board/index.php?topic=18903.0 cholera outbreak glasgowWebMay 25, 2012 · fstsw ax ;copy the content of the Status Word to AX fwait ;insure the last instruction is completed sahf ;copy the C3/C2/C0 condition codes to the ZF/PF/CF flags jz C3is1 ;either Zero, Empty or Denormalized if C3=1 ... cholera outbreak in nepalWebThe FSTSW instruction checks for and handles pending unmasked floating-point exceptions before storing the status word; the FNSTSW instruction does not. The FNSTSW AX form … cholera outbreak in taclobanWebStore Status Word (fstsw, fnstsw) fstsw fnstsw Example. fstsw %ax Restore State (frstor) frstor Example. frstor 2(%ecx) CPU Wait (fwait, wait) fwait wait Example. fwait. Clear … cholera outbreak in ohiohttp://qcd.phys.cmu.edu/QCDcluster/intel/vtune/reference/vc121.htm graystone eye lenoir north carolina