[Xen-changelog] [xen master] x86emul: add high register S/G test cases

[patchbot@xxxxxxx]

commit 062a7faded0a4e3bad789c4e8906cc0fa2400bde
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Jul 5 10:39:41 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jul 5 10:39:41 2019 +0200

    x86emul: add high register S/G test cases
    
    In order to verify that in particular the index register decoding works
    correctly in the S/G emulation paths, add dedicated (64-bit only) cases
    disallowing the compiler to use the lower registers. Other than in the
    generic SIMD case, where occasional uses of %xmm or %ymm registers in
    generated code cause various internal compiler errors when disallowing
    use of all of the lower 16 registers (apparently due to insn templates
    trying to use AVX2 encodings), doing so here in the AVX512F case looks
    to be fine.
    
    While the main goal here is the AVX512F case, add an AVX2 variant as
    well.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/tests/x86_emulator/Makefile            | 6 ++++++
 tools/tests/x86_emulator/test_x86_emulator.c | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/tools/tests/x86_emulator/Makefile 
b/tools/tests/x86_emulator/Makefile
index 1bd70785c1..376991b329 100644
--- a/tools/tests/x86_emulator/Makefile
+++ b/tools/tests/x86_emulator/Makefile
@@ -147,6 +147,12 @@ $(foreach flavor,$(SIMD) $(FMA),$(eval $(call 
simd-defs,$(flavor))))
 $(foreach flavor,$(SG),$(eval $(call simd-sg-defs,$(flavor))))
 $(foreach flavor,$(OPMASK),$(eval $(call opmask-defs,$(flavor))))
 
+first-string = $(shell for s in $(1); do echo "$$s"; break; done)
+
+avx2-sg-cflags-x86_64    := "-D_high $(foreach n,7 6 5 4 3 2 
1,-ffixed-ymm$(n)) $(call first-string,$(avx2-sg-cflags))"
+avx512f-sg-cflags-x86_64 := "-D_higher $(foreach n,7 6 5 4 3 2 
1,-ffixed-zmm$(n)) $(call first-string,$(avx512f-sg-cflags))"
+avx512f-sg-cflags-x86_64 += "-D_highest $(foreach n,15 14 13 12 11 10 9 
8,-ffixed-zmm$(n)) $(call first-string,$(avx512f-sg-cflags-x86_64))"
+
 $(addsuffix .h,$(TESTCASES)): %.h: %.c testcase.mk Makefile
        rm -f $@.new $*.bin
        $(foreach arch,$(filter-out $(XEN_COMPILE_ARCH),x86_32) 
$(XEN_COMPILE_ARCH), \
diff --git a/tools/tests/x86_emulator/test_x86_emulator.c 
b/tools/tests/x86_emulator/test_x86_emulator.c
index 2e420ba9a2..5dfa20cb5a 100644
--- a/tools/tests/x86_emulator/test_x86_emulator.c
+++ b/tools/tests/x86_emulator/test_x86_emulator.c
@@ -266,6 +266,9 @@ static const struct {
     SIMD(AVX2 S/G i64[4x32],  avx2_sg,    32x4i8),
     SIMD(AVX2 S/G i32[4x64],  avx2_sg,    32x8i4),
     SIMD(AVX2 S/G i64[4x64],  avx2_sg,    32x8i8),
+#ifdef __x86_64__
+    SIMD_(64, AVX2 S/G %ymm8+, avx2_sg,     high),
+#endif
     SIMD(XOP 128bit single,       xop,      16f4),
     SIMD(XOP 256bit single,       xop,      32f4),
     SIMD(XOP 128bit double,       xop,      16f8),
@@ -303,6 +306,10 @@ static const struct {
     SIMD(AVX512F S/G i64[ 8x32], avx512f_sg, 64x4i8),
     SIMD(AVX512F S/G i32[ 8x64], avx512f_sg, 64x8i4),
     SIMD(AVX512F S/G i64[ 8x64], avx512f_sg, 64x8i8),
+#ifdef __x86_64__
+    SIMD_(64, AVX512F S/G %zmm8+, avx512f_sg, higher),
+    SIMD_(64, AVX512F S/G %zmm16+, avx512f_sg, highest),
+#endif
     AVX512VL(VL f32x4,        avx512f,      16f4),
     AVX512VL(VL f64x2,        avx512f,      16f8),
     AVX512VL(VL f32x8,        avx512f,      32f4),
--
generated by git-patchbot for /home/xen/git/xen.git#master

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