mirror of
https://github.com/johnwinans/rvalp.git
synced 2025-09-27 21:22:44 -04:00
Clean up J type instruction decoding diagram.
This commit is contained in:
John Winans
parent
8c15079ac6
commit
8746aad3f0
@ -18,7 +18,8 @@
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% #2 The string to print
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\newcommand\DrawBitstring[2]{
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\foreach \x in {1,...,#1}%
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\draw(\x,0) node{\substring{#2}{\x}{\x}};%
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\draw(\x,0) node{\substring{#2}{\x}{\x}};%
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% \draw(\x,.5) node[text width = 10, text height = 1]{\substring{#2}{\x}{\x}};% Improve vertical text alignment
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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@ -226,11 +227,11 @@
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%
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% #1 The number of characters in the string
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% #2 The string of characters to plot
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% #3 Right-side label
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\newcommand\DrawInsnBitstring[3]{
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\pgfmathsetmacro\num{int(#1-1)}
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\foreach \x in {1,2,...,#1}
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\draw(\x,0) node{\substring{#2}{\x}{\x}};
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\draw(\x+.25,-.3) node[text width = 10, text height = 1]{\substring{#2}{\x}{\x}};
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\draw(#1+1,0) node[right]{#3};
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}
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@ -238,7 +239,7 @@
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% Draw a bit-separator line with labels at the given bit-offset (from the right)
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%
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% #1 Total box width
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% #2 The position that the sepatator will be drawn to the left.
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% #2 The position that the separator will be drawn to the left.
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\newcommand\DrawInsnBoxSep[2]{
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\draw (#1-#2-.5,-.75) -- (#1-#2-.5, 1.5);
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\node at (#1-#2,1.2) {\tiny#2};
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@ -328,23 +329,43 @@
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\DrawInsnTypeUTikz{#2}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 the binary encoding
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\newcommand\DrawInsnTypeJ[1]{
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\StrLen{#1}[\numchars]
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\begin{scope}[shift={(0,.75)}]
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\DrawInsnBitstring{\numchars}{#1}{\hyperref[insnformat:jtype]{J-type}}
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\DrawInsnBoxSeg{\numchars}{31}{12}{imm[20\textbar10:1\textbar11\textbar19:12]}
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\DrawInsnBoxSeg{\numchars}{11}{7}{rd}
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\DrawInsnBoxSeg{\numchars}{6}{0}{opcode}
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% \DrawHexMarkers{\numchars}
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\end{scope}
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% add some hint bits in for imm fields
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\draw {[rounded corners=\SignBoxCornerRadius] (1.35, .15) -- (1.35, 1.35) -- (.65, 1.36) -- (.65, .15) -- cycle}; % sign bit
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\draw (32-19-.5, 0) -- (32-19.5, .85); % imm[19:12]
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\draw (32-20-.5, 0) -- (32-20.5, .85); % imm[11]
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\DrawHexMarkersRel{\numchars}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 the binary encoding
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\newcommand\DrawInsnTypeJTikz[1]{
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\BeginTikzPicture
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\StrLen{#1}[\numchars]
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\DrawInsnBitstring{\numchars}{#1}{\hyperref[insnformat:jtype]{J-type}}
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\DrawInsnBoxSeg{\numchars}{31}{12}{imm[20\textbar10:1\textbar11\textbar19:12]}
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\DrawInsnBoxSeg{\numchars}{11}{7}{rd}
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\DrawInsnBoxSeg{\numchars}{6}{0}{opcode}
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\DrawInsnTypeJ{#1}
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% \StrLen{#1}[\numchars]
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% \DrawInsnBitstring{\numchars}{#1}{\hyperref[insnformat:jtype]{J-type}}
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% \DrawInsnBoxSeg{\numchars}{31}{12}{imm[20\textbar10:1\textbar11\textbar19:12]}
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% \DrawInsnBoxSeg{\numchars}{11}{7}{rd}
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% \DrawInsnBoxSeg{\numchars}{6}{0}{opcode}
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%
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% % add some hint bits in for imm fields
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% \draw {[rounded corners=\SignBoxCornerRadius] (1.35, -.6) -- (1.35, .6) -- (.65, .6) -- (.65, -.6) -- cycle}; % sign bit
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% \draw (32-19-.5, -.75) -- (32-19.5, .1); % imm[19:12]
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% \draw (32-20-.5, -.75) -- (32-20.5, .1); % imm[11]
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% \DrawHexMarkers{\numchars}
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% add some hint bits in for imm fields
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\draw {[rounded corners=\SignBoxCornerRadius] (1.35, -.6) -- (1.35, .6) -- (.65, .6) -- (.65, -.6) -- cycle}; % sign bit
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\draw (32-19-.5, -.75) -- (32-19.5, .1); % imm[19:12]
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\draw (32-20-.5, -.75) -- (32-20.5, .1); % imm[11]
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\DrawHexMarkers{\numchars}
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\EndTikzPicture
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}
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@ -605,30 +626,59 @@
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% #1 MSB position
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% #2 LSB position
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% #3 the segment label
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\newcommand\DrawInsnBoxRel[3]{
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\newcommand\DrawInsnBoxRelTop[3]{
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\pgfmathsetmacro\leftpos{int(32-#1)}
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\pgfmathsetmacro\rightpos{int(32-#2)}
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\draw (\leftpos-.5,0) -- (\rightpos+.5,0); % box bottom
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\draw (\leftpos-.5,1.5) -- (\rightpos+.5,1.5); % box top
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\draw (\leftpos-.5,0) -- (\leftpos-.5, 1.5); % left end
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\draw (\leftpos-.5,0) -- (\leftpos-.5, 1.5); % left end
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\draw (\rightpos+.5,0) -- (\rightpos+.5, 1.5); % right end
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% \node at (\leftpos,1.5) {\tiny#1};
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% \draw(\rightpos,1.5) node{\tiny#2};
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\pgfmathsetmacro\posn{32-#1+(#1-#2)/2}
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\node at (\posn,.75) {\small#3}; % the field label
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\pgfmathsetmacro\posn{32-#1+(#1-#2)/2}
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\node at (\posn,.75) {\small#3}; % the field label
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}
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% Draw only the bottom line of an instruction box with a baseline at zero
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% #1 MSB position
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% #2 LSB position
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\newcommand\DrawInsnBoxRelBottom[2]{
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\pgfmathsetmacro\leftpos{int(32-#1)}
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\pgfmathsetmacro\rightpos{int(32-#2)}
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\draw (\leftpos-.5,0) -- (\rightpos+.5,0); % box bottom
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Draw an instruction box with a baseline at zero
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% #1 MSB position
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% #2 LSB position
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% #3 the segment label
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\newcommand\DrawInsnBoxRel[3]{
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\DrawInsnBoxRelTop{#1}{#2}{#3}
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\DrawInsnBoxRelBottom{#1}{#2}
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}
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%\newcommand\DrawInsnBoxRel[3]{
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% \pgfmathsetmacro\leftpos{int(32-#1)}
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% \pgfmathsetmacro\rightpos{int(32-#2)}
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%
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% \draw (\leftpos-.5,0) -- (\rightpos+.5,0); % box bottom
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% \draw (\leftpos-.5,1.5) -- (\rightpos+.5,1.5); % box top
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% \draw (\leftpos-.5,0) -- (\leftpos-.5, 1.5); % left end
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% \draw (\rightpos+.5,0) -- (\rightpos+.5, 1.5); % right end
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%
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% \pgfmathsetmacro\posn{32-#1+(#1-#2)/2}
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% \node at (\posn,.75) {\small#3}; % the field label
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%}
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% #1 MSB position
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% #2 LSB position
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\newcommand\DrawInsnBoxCastle[2]{
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\pgfmathsetmacro\leftpos{int(32-#1)}
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\pgfmathsetmacro\rightpos{int(32-#2)}
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\draw (\leftpos-.5,0) -- (\leftpos-.5, .5); % left end
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\draw (\rightpos+.5,0) -- (\rightpos+.5, .5); % right end
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\draw (\leftpos-.5,0) -- (\leftpos-.5, .75); % left end
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\draw (\rightpos+.5,0) -- (\rightpos+.5, .75); % right end
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\node at (\leftpos,.5) {\tiny#1};
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\draw(\rightpos,.5) node{\tiny#2};
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\ifthenelse{\equal{#1}{#2}}
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{}
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{ \draw(\rightpos,.5) node{\tiny#2}; }
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}
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\newcommand\DrawInsnBoxCastleRtype{
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\DrawInsnBoxCastle{31}{25}
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@ -639,6 +689,15 @@
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\DrawInsnBoxCastle{6}{0}
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}
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\newcommand\DrawInsnBoxCastleJtype{
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\DrawInsnBoxCastle{31}{31}
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\DrawInsnBoxCastle{30}{21}
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\DrawInsnBoxCastle{20}{20}
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\DrawInsnBoxCastle{19}{12}
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\DrawInsnBoxCastle{11}{7}
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\DrawInsnBoxCastle{6}{0}
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}
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\newcommand\DrawInsnBoxLabelsBtype{
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\DrawInsnBoxRel{31}{25}{imm[12\textbar10:5]}
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@ -711,7 +770,8 @@
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\StrLen{#1}[\numchars]
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\pgfmathsetmacro\num{int(\numchars-1)}
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\foreach \x in {1,2,...,\numchars}
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\draw(\x,0) node{\substring{#1}{\x}{\x}};
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% \draw(\x,0) node{\substring{\strut #1}{\x}{\x}};
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\draw(\x+.25,.5) node[text width = 10, text height = 1]{\substring{#1}{\x}{\x}};
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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@ -727,8 +787,8 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -742,8 +802,8 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -759,9 +819,9 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-31,.75)}]\DrawBitstringX{#4}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-31,0)}]\DrawBitstringX{#4}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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@ -777,8 +837,8 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -794,16 +854,16 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-31,.75)}]\DrawBitstringX{#4}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-31,0)}]\DrawBitstringX{#4}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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% #2 func3
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% #3 mneumonic
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\newcommand\DrawInsnOpFenceType[3]{
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\DrawInsnBoxRel{31}{28}{fm}
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\DrawInsnBoxRel{31}{28}{}
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\DrawInsnBoxRel{27}{24}{pred}
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\DrawInsnBoxRel{23}{20}{succ}
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\DrawInsnBoxRel{19}{15}{rs1}
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@ -812,8 +872,8 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{#2}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -827,11 +887,11 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#3};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-11,.75)}]\DrawBitstringX{00000}\end{scope}
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\begin{scope}[shift={(31-14,.75)}]\DrawBitstringX{000}\end{scope}
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\begin{scope}[shift={(31-19,.75)}]\DrawBitstringX{00000}\end{scope}
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\begin{scope}[shift={(31-31,.75)}]\DrawBitstringX{#2}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-11,0)}]\DrawBitstringX{00000}\end{scope}
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\begin{scope}[shift={(31-14,0)}]\DrawBitstringX{000}\end{scope}
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\begin{scope}[shift={(31-19,0)}]\DrawBitstringX{00000}\end{scope}
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\begin{scope}[shift={(31-31,0)}]\DrawBitstringX{#2}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -842,7 +902,7 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#2};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 opcode
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@ -853,7 +913,8 @@
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\DrawInsnBoxRel{6}{0}{}
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\draw(33,.75) node[right]{#2};
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\begin{scope}[shift={(31-6,.75)}]\DrawBitstringX{#1}\end{scope}
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\begin{scope}[shift={(31-6,0)}]\DrawBitstringX{#1}\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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@ -954,6 +1015,120 @@
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\newcommand\BitBoxArrowInset{-.2}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% #1 MSB position
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% #2 width
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\newcommand\InsnBoxFieldWidthArrow[2]{
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\pgfmathsetmacro\result{int(31-#1)} % Calculate the left end position
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\begin{scope}[shift={(\result,-.5)}] % Move to left end of arrow & below origin
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\pgfmathsetmacro\result{#2*.5+.5} % the center position
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\node at (\result,0) {\tiny#2}; % size below the box
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\ifthenelse{#2 > 9}
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{ \pgfmathsetmacro\Inset{0.4} }
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{
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\ifthenelse{#2 > 1}
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{ \pgfmathsetmacro\Inset{0.25} }
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{ \pgfmathsetmacro\Inset{0.15} }
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}
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\draw[->] (\result+\Inset,0) -- (#2+.49,0); % arrow to the right
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\draw[->] (\result-\Inset,0) -- (.51,0); % arrow to the left
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\end{scope}
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}
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\newcommand\DrawInsnOpJTypeDecoding{
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\BeginTikzPicture
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% \begin{scope}[shift={(0,1.5)}]\DrawInsnBoxCastleJtype\end{scope}
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% \begin{scope}[shift={(0,0)}]\DrawInsnOpJType{1101111}{\hyperref[insn:jal]{jal}}\end{scope}
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\begin{scope}[shift={(0,-1.5)}]
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% \DrawInsnBoxRel{31}{12}{}
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% \DrawInsnBoxRel{11}{7}{rd}
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% \DrawInsnBoxRel{6}{0}{}
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% \draw(33,.75) node[right]{jal};
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% \begin{scope}[shift={(31-6,0)}]\DrawBitstringX{1101111}\end{scope}
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% \begin{scope}[shift={(31-31,0)}]\DrawBitstringX{abcdefghijklmnopqrst}\end{scope}
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\DrawInsnTypeJ{abcdefghijklmnopqrst001111101111}
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\pgfmathsetmacro\ArrowNorth{\BitBoxArrowInset}
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\pgfmathsetmacro\ArrowSouth{-16-\BitBoxArrowInset}
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](1,\ArrowSouth); % 20
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](2,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](3,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](4,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](5,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](6,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](7,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](8,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](9,\ArrowSouth); % sign extend
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\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](10,\ArrowSouth); % sign extend
|
||||
\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](11,\ArrowSouth); % sign extend
|
||||
\draw[blue,->](1,\ArrowNorth)to[out=270,in=90](12,\ArrowSouth); % sign extend
|
||||
|
||||
\draw[blue,->](13,\ArrowNorth)to[out=270,in=90](13,\ArrowSouth); % 19
|
||||
\draw[blue,->](14,\ArrowNorth)to[out=270,in=90](14,\ArrowSouth); % 18
|
||||
\draw[blue,->](15,\ArrowNorth)to[out=270,in=90](15,\ArrowSouth); % 17
|
||||
\draw[blue,->](16,\ArrowNorth)to[out=270,in=90](16,\ArrowSouth); % 16
|
||||
\draw[blue,->](17,\ArrowNorth)to[out=270,in=90](17,\ArrowSouth); % 15
|
||||
\draw[blue,->](18,\ArrowNorth)to[out=270,in=90](18,\ArrowSouth); % 14
|
||||
\draw[blue,->](19,\ArrowNorth)to[out=270,in=90](19,\ArrowSouth); % 13
|
||||
\draw[blue,->](20,\ArrowNorth)to[out=270,in=90](20,\ArrowSouth); % 12
|
||||
|
||||
\draw[blue,->](12,\ArrowNorth)to[out=270,in=90](21,\ArrowSouth); % 11
|
||||
|
||||
\draw[blue,->](2,\ArrowNorth)to[out=270,in=90](22,\ArrowSouth); % 10
|
||||
\draw[blue,->](3,\ArrowNorth)to[out=270,in=90](23,\ArrowSouth); % 9
|
||||
\draw[blue,->](4,\ArrowNorth)to[out=270,in=90](24,\ArrowSouth); % 8
|
||||
\draw[blue,->](5,\ArrowNorth)to[out=270,in=90](25,\ArrowSouth); % 7
|
||||
\draw[blue,->](6,\ArrowNorth)to[out=270,in=90](26,\ArrowSouth); % 6
|
||||
\draw[blue,->](7,\ArrowNorth)to[out=270,in=90](27,\ArrowSouth); % 5
|
||||
\draw[blue,->](8,\ArrowNorth)to[out=270,in=90](28,\ArrowSouth); % 4
|
||||
\draw[blue,->](9,\ArrowNorth)to[out=270,in=90](29,\ArrowSouth); % 3
|
||||
\draw[blue,->](10,\ArrowNorth)to[out=270,in=90](30,\ArrowSouth); % 2
|
||||
\draw[blue,->](11,\ArrowNorth)to[out=270,in=90](31,\ArrowSouth); % 1
|
||||
|
||||
\draw[blue,->](32,\ArrowSouth+1)to[out=270,in=90](32,\ArrowSouth); % 0 (special case)
|
||||
\node at (32,\ArrowSouth+2) {0};
|
||||
|
||||
\begin{scope}[shift={(0,0)}]\DrawHexMarkersRel{32}\end{scope}
|
||||
\end{scope}
|
||||
|
||||
\begin{scope}[shift={(0,-19.75)}]
|
||||
\begin{scope}[shift={(0,1.5)}]
|
||||
\DrawInsnBoxCastle{31}{20}
|
||||
\DrawInsnBoxCastle{19}{12}
|
||||
\DrawInsnBoxCastle{11}{11}
|
||||
\DrawInsnBoxCastle{10}{1}
|
||||
\DrawInsnBoxCastle{0}{0}
|
||||
\end{scope}
|
||||
\DrawInsnBoxRel{31}{0}{}
|
||||
|
||||
\begin{scope}[shift={(0,0)}]\DrawBitstringX{aaaaaaaaaaaamnopqrstlbcdefghijk0}\end{scope}
|
||||
\begin{scope}[shift={(0,0)}]\DrawHexMarkersRel{32}\end{scope}
|
||||
|
||||
\InsnBoxFieldWidthArrow{31}{12}
|
||||
% \InsnBoxFieldWidthArrow{20}{1}
|
||||
\InsnBoxFieldWidthArrow{19}{8}
|
||||
\InsnBoxFieldWidthArrow{11}{1}
|
||||
\InsnBoxFieldWidthArrow{10}{10}
|
||||
\InsnBoxFieldWidthArrow{0}{1}
|
||||
\end{scope}
|
||||
|
||||
|
||||
|
||||
|
||||
\EndTikzPicture
|
||||
}
|
||||
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||||
|
||||
@ -355,32 +355,22 @@ being constructed, a zero-bit will be added to the \acrshort{lsb}
|
||||
and the value in bit-position 20 will be replicated to sign-extend the
|
||||
value to \Gls{xlen} bits as discussed in \autoref{extension:slzr}.
|
||||
|
||||
|
||||
If \Gls{xlen}=32 then the {\em imm} value in this example will be converted as
|
||||
shown below.
|
||||
|
||||
\DrawBitBoxSignLeftZeroRightExtendedPicture{32}{01000000110111001001}{1}
|
||||
\DrawInsnOpJTypeDecoding
|
||||
|
||||
%$00111001001110000001_2$ (\verb@39381@$_16$) to
|
||||
%$00000000000010000001101110010010_2$ (\verb@00081b92@$_16$).
|
||||
%\DrawBitBoxSignLeftZeroRightExtendedPicture{32}{01000000110111001001}{1}
|
||||
%
|
||||
%If \Gls{xlen}=64 then the imm value in this example will be converted to\\
|
||||
%$0000000000000000000000000000000000000000000010000001101110010010_2$
|
||||
%(\verb@0000000000081b92@$_16$).
|
||||
|
||||
A J-type example with a negative imm field:
|
||||
|
||||
\DrawInsnTypeJTikz{10111001001110000001001111101111}
|
||||
|
||||
If \Gls{xlen}=32 then the {\em imm} field in this example will be converted as
|
||||
shown below.
|
||||
|
||||
\DrawBitBoxSignLeftZeroRightExtendedPicture{32}{11000000110111001001}{1}
|
||||
|
||||
%$10111001001110000001_2$ (\verb@b9381@$_16$) to
|
||||
%$1111111111111000 0001101110010010_2$ (\verb@fff81b92@$_16$).
|
||||
%A J-type example with a negative imm field:
|
||||
%
|
||||
%If \Gls{xlen}=32 then the imm value in this example will be converted to
|
||||
%\verb@fffffffffff81b92@$_16$.
|
||||
%\DrawInsnTypeJTikz{10111001001110000001001111101111}
|
||||
%
|
||||
%If \Gls{xlen}=32 then the {\em imm} field in this example will be converted as
|
||||
%shown below.
|
||||
%
|
||||
%\DrawBitBoxSignLeftZeroRightExtendedPicture{32}{11000000110111001001}{1}
|
||||
|
||||
The J-type format is used by the Jump And Link instruction that calculates
|
||||
a target address by adding a signed immediate value to the current program
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user