move buffer view offset to src (#16364)

* this work?

* failed

spec/tinyspec.tex

@@ -53,8 +53,6 @@ All nodes in the tinygrad graph are \textbf{UOps}. A UOp is a tuple $(\mathrm{op
   Placeholder with shape $\mathbf{s}$. Substituted in \op{Function}. \\[4pt]
 \op{Buffer} & () & size, dtype, device, addrspace &
   Shape $(n \cdot \textit{size},)$ if device is $n$-tuple, else $(\textit{size},)$. \\
-\op{BufferView} & (buf,) & size, dtype, offset &
-  Typed access into a buffer. Zero-copy $(\textit{size},)$ slice at offset; inherits addrspace. \\
 \op{Const} & () & value, dtype &
   A scalar constant with shape $(\ )$. \\
   & & & Form vector consts with \op{Stack} \\
@@ -66,7 +64,7 @@ All nodes in the tinygrad graph are \textbf{UOps}. A UOp is a tuple $(\mathrm{op
 A \op{Buffer}'s \textbf{addrspace} is \texttt{GLOBAL}, \texttt{LOCAL}, or \texttt{REG}.
 
 %% ============================================================
-\subsection*{{\color{movgreen}Movement Ops} \normalfont\small--- no arithmetic, shapes are $(k,)$-shaped UOps with dtype \texttt{index} in src}
+\subsection*{{\color{movgreen}Movement Ops} \normalfont\small--- no arithmetic; view, indexing, and reinterpretation only}
 
 \begin{tabular}{@{}l l l l@{}}
 \toprule
@@ -81,6 +79,7 @@ A \op{Buffer}'s \textbf{addrspace} is \texttt{GLOBAL}, \texttt{LOCAL}, or \textt
 \op{Index} & $(T, i_0, i_1, \ldots)$ & --- & Index from left. $()$-shaped $i$ removes dim; $(k,)$-shaped makes it $k$. \\
 \op{Stack} & $(T_0, T_1, \ldots)$ & --- & Join along a newly created leading axis. All shapes must match. \\
 \op{Replicated} & $(T,)$ & axes & Mark $T$ as replicated along axes. Collapse axes to $1$. \\
+\op{BufferView} & $(T, \mathrm{offset})$ & size, dtype & Zero-copy \textit{size} elems of dtype; offset is \texttt{weakint} bytes. \\
 \bottomrule
 \end{tabular}