x86: introduce .hfloat directive

[binutils-gdb.git] / gas / doc / c-i386.texi

diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 23eee3bc003f7203354b247e7796a66b5a4b5d59..664237c75c9a18e514ca2927a7877b301ced8cad 100644 (file)
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -1,4 +1,4 @@
-@c Copyright (C) 1991-2020 Free Software Foundation, Inc.
+@c Copyright (C) 1991-2021 Free Software Foundation, Inc.
 @c This is part of the GAS manual.
 @c For copying conditions, see the file as.texinfo.
 @c man end
@@ -214,6 +214,7 @@ accept various extension mnemonics.  For example,
 @code{tdx},
 @code{avx512_bf16},
 @code{avx_vnni},
+@code{avx512_fp16},
 @code{noavx512f},
 @code{noavx512cd},
 @code{noavx512er},
@@ -233,6 +234,7 @@ accept various extension mnemonics.  For example,
 @code{notdx},
 @code{noavx512_bf16},
 @code{noavx_vnni},
+@code{noavx512_fp16},
 @code{noenqcmd},
 @code{noserialize},
 @code{notsxldtrk},
@@ -513,7 +515,7 @@ before indirect near branch instructions.
 before indirect near branch via register and issue a warning before
 indirect near branch via memory.
 It also implicitly sets @option{-mlfence-before-ret=@var{shl}} when
-there's no explict @option{-mlfence-before-ret=}.
+there's no explicit @option{-mlfence-before-ret=}.
 @option{-mlfence-before-indirect-branch=@var{register}} will generate
 lfence before indirect near branch via register.
 @option{-mlfence-before-indirect-branch=@var{memory}} will issue a
@@ -952,7 +954,7 @@ The Intel-syntax extension instructions
 
 @noindent
 are called @samp{movsbw/movsxb/movsx}, @samp{movsbl/movsxb/movsx},
-@samp{movsbq/movsb/movsx}, @samp{movswl/movsxw}, @samp{movswq/movsxw},
+@samp{movsbq/movsxb/movsx}, @samp{movswl/movsxw}, @samp{movswq/movsxw},
 @samp{movslq/movsxl}, @samp{movzbw/movzxb/movzx},
 @samp{movzbl/movzxb/movzx}, @samp{movzbq/movzxb/movzx},
 @samp{movzwl/movzxw} and @samp{movzwq/movzxw} in AT&T syntax.
@@ -1311,18 +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
@@ -1335,7 +1340,7 @@ top) and @samp{fstpt} (store 80-bit real and pop stack) instructions.
 @item
 Integer constructors are @samp{.word}, @samp{.long} or @samp{.int}, and
 @samp{.quad} for the 16-, 32-, and 64-bit integer formats.  The
-corresponding instruction mnemonic suffixes are @samp{s} (single),
+corresponding instruction mnemonic suffixes are @samp{s} (short),
 @samp{l} (long), and @samp{q} (quad).  As with the 80-bit real format,
 the 64-bit @samp{q} format is only present in the @samp{fildq} (load
 quad integer to stack top) and @samp{fistpq} (store quad integer and pop
@@ -1519,7 +1524,7 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{.avx512vbmi} @tab @samp{.avx512_4fmaps} @tab @samp{.avx512_4vnniw}
 @item @samp{.avx512_vpopcntdq} @tab @samp{.avx512_vbmi2} @tab @samp{.avx512_vnni}
 @item @samp{.avx512_bitalg} @tab @samp{.avx512_bf16} @tab @samp{.avx512_vp2intersect}
-@item @samp{.tdx} @tab @samp{.avx_vnni}
+@item @samp{.tdx} @tab @samp{.avx_vnni}  @tab @samp{.avx512_fp16}
 @item @samp{.clwb} @tab @samp{.rdpid} @tab @samp{.ptwrite} @tab @item @samp{.ibt}
 @item @samp{.wbnoinvd} @tab @samp{.pconfig} @tab @samp{.waitpkg} @tab @samp{.cldemote}
 @item @samp{.shstk} @tab @samp{.gfni} @tab @samp{.vaes} @tab @samp{.vpclmulqdq}