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+
+
+
+PEXT returns wrong values, seemingly switches arguments
+
+Hi,
+
+I fiddled with BMI2 instructions and discovered that pext instructions
+emulated with "qemu-x86_64 -cpu Haswell" return the wrong value. It
+seemingly switches up its arguments. I suspect that the error is around the
+gen_helper_pext(...) call in target-i386/translate.c. I checked helper_pext
+in target-i386/int_helper.c and it works fine.
+
+I ran my program on a CPU with BMI2 instruction set too, and it indeed
+returns different values.
+
+I didn't check pdep, it could have the same problem.
+
+$ qemu-x86_64 --version
+qemu-x86_64 version 2.6.50 (v2.6.0-2095-ge66b05e-dirty), Copyright (c) 2003-2008 Fabrice Bellard
+
+$ uname -a
+Linux lenard-hp 4.3.0-1-amd64 #1 SMP Debian 4.3.5-1 (2016-02-06) x86_64 GNU/Linux
+
+I compiled the attached file with the command line "gcc -o main -g -mbmi2 main.c".
+
+$ gcc --version
+gcc (Debian 5.4.0-6) 5.4.0 20160609
+
+Best regards,
+Lénárd Szolnoki
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