Used to be broken in multiple ways.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
x86/emulator.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/x86/emulator.c b/x86/emulator.c
index d4f0363..73079f8 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -642,6 +642,16 @@ static void test_rip_relative(unsigned *mem, char *insn_ram)
report("movb $imm, 0(%rip)", *mem == 0x10000);
}
+static void test_shld_shrd(u32 *mem)
+{
+ *mem = 0x12345678;
+ asm("shld %2, %1, %0" : "+m"(*mem) : "r"(0xaaaaaaaaU), "c"((u8)3));
+ report("shld (cl)", *mem == ((0x12345678 << 3) | 5));
+ *mem = 0x12345678;
+ asm("shrd %2, %1, %0" : "+m"(*mem) : "r"(0x55555555U), "c"((u8)3));
+ report("shrd (cl)", *mem == ((0x12345678 >> 3) | (5u << 29)));
+}
+
int main()
{
void *mem;
@@ -684,6 +694,7 @@ int main()
test_div(mem);
test_sse(mem);
test_rip_relative(mem, insn_ram);
+ test_shld_shrd(mem);
printf("\nSUMMARY: %d tests, %d failures\n", tests, fails);
return fails ? 1 : 0;
--
1.7.6.1
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