gdb, i386: Enable AVX512-bfloat16 for i386 targets.

Values of type bfloat16 can also be used on 32-bit targets, which was missed
in the original enablement.  This also adjusts the testcase to pass with
"unix/-m32", where only the lower 8 AVX registers are available.

gdb/ChangeLog:
2021-07-21  Felix Willgerodt  <Felix.Willgerodt@intel.com>

	* features/i386/32bit-sse.xml: Add bfloat16 type.
	* features/i386/32bit-sse.c: Regenerated.

gdb/testsuite/ChangeLog:
2021-07-21  Felix Willgerodt  <Felix.Willgerodt@intel.com>

	* gdb.arch/x86-avx512bf16.exp: Only use x/z/ymm 0-7.

diff --git a/gdb/features/i386/32bit-sse.c b/gdb/features/i386/32bit-sse.c
index e5eaf8feb59e6efe55ba8fd9ac59e3cfb6493215..b6d5fbaf0fcaa9d6ea5722c1bd704bdd8d804082 100644 (file)
--- a/gdb/features/i386/32bit-sse.c
+++ b/gdb/features/i386/32bit-sse.c
@@ -10,6 +10,9 @@ create_feature_i386_32bit_sse (struct target_desc *result, long regnum)
 
   feature = tdesc_create_feature (result, "org.gnu.gdb.i386.sse");
   tdesc_type *element_type;
+  element_type = tdesc_named_type (feature, "bfloat16");
+  tdesc_create_vector (feature, "v8bf16", element_type, 8);
+
   element_type = tdesc_named_type (feature, "ieee_single");
   tdesc_create_vector (feature, "v4f", element_type, 4);
 
@@ -31,6 +34,8 @@ create_feature_i386_32bit_sse (struct target_desc *result, long regnum)
   tdesc_type_with_fields *type_with_fields;
   type_with_fields = tdesc_create_union (feature, "vec128");
   tdesc_type *field_type;
+  field_type = tdesc_named_type (feature, "v8bf16");
+  tdesc_add_field (type_with_fields, "v8_bfloat16", field_type);
   field_type = tdesc_named_type (feature, "v4f");
   tdesc_add_field (type_with_fields, "v4_float", field_type);
   field_type = tdesc_named_type (feature, "v2d");

diff --git a/gdb/features/i386/32bit-sse.xml b/gdb/features/i386/32bit-sse.xml
index 7bf3e0f382830dff9bf9a355f056084b67e91321..8710622e9446e8220d652b19f947ae8794dd1d14 100644 (file)
--- a/gdb/features/i386/32bit-sse.xml
+++ b/gdb/features/i386/32bit-sse.xml
@@ -7,6 +7,7 @@
 
 <!DOCTYPE feature SYSTEM "gdb-target.dtd">
 <feature name="org.gnu.gdb.i386.sse">
+  <vector id="v8bf16" type="bfloat16" count="8"/>
   <vector id="v4f" type="ieee_single" count="4"/>
   <vector id="v2d" type="ieee_double" count="2"/>
   <vector id="v16i8" type="int8" count="16"/>
@@ -14,6 +15,7 @@
   <vector id="v4i32" type="int32" count="4"/>
   <vector id="v2i64" type="int64" count="2"/>
   <union id="vec128">
+    <field name="v8_bfloat16" type="v8bf16"/>
     <field name="v4_float" type="v4f"/>
     <field name="v2_double" type="v2d"/>
     <field name="v16_int8" type="v16i8"/>

diff --git a/gdb/testsuite/gdb.arch/x86-avx512bf16.exp b/gdb/testsuite/gdb.arch/x86-avx512bf16.exp
index 20528169c64bf6e95131f817cf175b4042dab192..528e79f02dfdbb4808920c97c5fdb7bde4a20a4b 100644 (file)
--- a/gdb/testsuite/gdb.arch/x86-avx512bf16.exp
+++ b/gdb/testsuite/gdb.arch/x86-avx512bf16.exp
@@ -64,11 +64,11 @@ gdb_test "print \$zmm6.v32_bfloat16\[1\]" "= 68.5"
 # Test setting of bfloat values
 gdb_test_no_output "set var \$xmm0.v8_bfloat16\[0\] = 32.25" \
     "set %xmm0.v8_bfloat16\[0\]"
-gdb_test_no_output "set var \$ymm8.v16_bfloat16\[1\] = 33.5" \
-    "set %ymm8.v16_bfloat16\[1\]"
-gdb_test_no_output "set var \$zmm16.v32_bfloat16\[2\] = 22.75" \
-    "set %zmm16.v32_bfloat16\[2\]"
+gdb_test_no_output "set var \$ymm4.v16_bfloat16\[1\] = 33.5" \
+    "set %ymm4.v16_bfloat16\[1\]"
+gdb_test_no_output "set var \$zmm7.v32_bfloat16\[2\] = 22.75" \
+    "set %zmm7.v32_bfloat16\[2\]"
 
 gdb_test "p \$xmm0.v8_bfloat16\[0\]" "= 32.25"
-gdb_test "p \$ymm8.v16_bfloat16\[1\]" "= 33.5"
-gdb_test "p \$zmm16.v32_bfloat16\[2\]" "= 22.75"
+gdb_test "p \$ymm4.v16_bfloat16\[1\]" "= 33.5"
+gdb_test "p \$zmm7.v32_bfloat16\[2\]" "= 22.75"