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author | Jan Beulich <jbeulich@suse.com> | 2021-08-11 08:32:54 +0200 |
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committer | Jan Beulich <jbeulich@suse.com> | 2021-08-11 08:32:54 +0200 |
commit | 7d19d096292acac01d0fde4d99c3e49d69688e03 (patch) | |
tree | 5b691ba4679786fb0e8aae2a4e328e2e601b91b6 /gas/doc | |
parent | 8f2200fe8e7f17295ed6d9bbc908da533c95e089 (diff) | |
download | gdb-7d19d096292acac01d0fde4d99c3e49d69688e03.zip gdb-7d19d096292acac01d0fde4d99c3e49d69688e03.tar.gz gdb-7d19d096292acac01d0fde4d99c3e49d69688e03.tar.bz2 |
x86: introduce .hfloat directive
This is to be able to generate data passed to {,V}CVTPH2PS and acted
upon by AVX512-FP16 insns. To be able to also use the hex forms
supported for other floating point formats, a small addition to the
generic hex_float() is needed.
Extend existing x86 testcases.
Diffstat (limited to 'gas/doc')
-rw-r--r-- | gas/doc/c-i386.texi | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi index 9058ad4..664237c 100644 --- a/gas/doc/c-i386.texi +++ b/gas/doc/c-i386.texi @@ -1313,18 +1313,21 @@ data type. Constructors build these data types into memory. @cindex @code{single} directive, i386 @cindex @code{double} directive, i386 @cindex @code{tfloat} directive, i386 +@cindex @code{hfloat} directive, i386 @cindex @code{float} directive, x86-64 @cindex @code{single} directive, x86-64 @cindex @code{double} directive, x86-64 @cindex @code{tfloat} directive, x86-64 +@cindex @code{hfloat} directive, x86-64 @itemize @bullet @item Floating point constructors are @samp{.float} or @samp{.single}, -@samp{.double}, and @samp{.tfloat} for 32-, 64-, and 80-bit formats. -These correspond to instruction mnemonic suffixes @samp{s}, @samp{l}, -and @samp{t}. @samp{t} stands for 80-bit (ten byte) real. The 80387 -only supports this format via the @samp{fldt} (load 80-bit real to stack -top) and @samp{fstpt} (store 80-bit real and pop stack) instructions. +@samp{.double}, @samp{.tfloat}, and @samp{.hfloat} for 32-, 64-, 80-, and +16-bit formats respectively. The former three correspond to instruction +mnemonic suffixes @samp{s}, @samp{l}, and @samp{t}. @samp{t} stands for +80-bit (ten byte) real. The 80387 only supports this format via the +@samp{fldt} (load 80-bit real to stack top) and @samp{fstpt} (store 80-bit +real and pop stack) instructions. @cindex @code{word} directive, i386 @cindex @code{long} directive, i386 |