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.

1 files changed, 5 insertions, 0 deletions

diff --git a/gas/read.c b/gas/read.c
index b8e845d..4170a25 100644
--- a/gas/read.c
+++ b/gas/read.c
@@ -4852,6 +4852,11 @@ hex_float (int float_type, char *bytes)
 
   switch (float_type)
     {
+    case 'h':
+    case 'H':
+      length = 2;
+      break;
+
     case 'f':
     case 'F':
     case 's':