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libctf: doc: add __float128 and SIMD vector classification to spec.

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This patch adds two additional distinct types (__float128 and the SIMD
vector type generated from the vector_size attribute) to the umbrella of
two existing types (long double and array, respectively). These types
were previously invalid, producing CTF_K_UNKNOWN in the case of
__float128 or a float in the case of the SIMD vector. This patch will
cleanly allow these types to be represented more accurately without
breaking back-compat.

Signed-off-by: Bruce McCulloch <bruce.mcculloch@oracle.com>
Reviewed-by: Nick Alcock <nick.alcock@oracle.com>
This commit is contained in:
Bruce McCulloch
2025-06-27 09:21:52 -07:00
committed by Nick Alcock
parent ee42b0ad05
commit 11bacd955a
1 changed files with 9 additions and 2 deletions
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11
libctf/doc/ctf-spec.texi
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@@ -829,7 +829,7 @@ of kind @code{CTF_K_UNKNOWN}.
@item 4
@tab @code{CTF_K_ARRAY}
@tab An array. @xref{Arrays}.
@tab An array or SIMD vector. @xref{Arrays}.
@item 5
@tab @code{CTF_K_FUNCTION}
@@ -1064,7 +1064,7 @@ unused and will become used in future.
@tindex CTF_FP_LDCPLX
@item 6
@tab @code{CTF_FP_LDOUBLE}
@tab This is a @code{long double}.
@tab This is a @code{long double}, or quad-precision IEEE 754-2008 @code{__float128}.
@tindex CTF_FP_LDOUBLE
@item 7
@tab @code{CTF_FP_INTRVL}
@@ -1232,6 +1232,13 @@ Arrays are encoded as types of kind @code{CTF_K_ARRAY} in a @code{ctf_stype_t}.
Both size and kind for arrays are zero. The variable-length data is a
@code{ctf_array_t}: @code{vlen} in the info word should be disregarded and is
always zero.
@c In CTFv4 and BTF, the @code{kind_flag} member of @{ctf_array_t} is not set.
SIMD vectors are also encoded as types of kind @code{CTF_K_ARRAY} in a
@code{ctf_stype_t}. Both size and kind for arrays are zero. The
variable-length data is a @code{ctf_array_t}: @code{vlen} in the info word
should be disregarded and is always zero.
@c In CTFv4 and BTF, the @code{kind_flag} member of @{ctf_array_t} is set.
@verbatim
typedef struct ctf_array