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authorChristian Krinitsin <mail@krinitsin.com>2025-07-08 13:28:15 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-08 13:28:28 +0200
commit5aa276efcbd67f4300ca1a7f809c6e00aadb03da (patch)
tree9b8f0e074014cda8d42f5a97a95bc25082d8b764 /results/classifier/zero-shot-user-mode/instruction/1793608
parent1a3c4faf4e0a25ed0b86e8739d5319a634cb9112 (diff)
downloadqemu-analysis-5aa276efcbd67f4300ca1a7f809c6e00aadb03da.tar.gz
qemu-analysis-5aa276efcbd67f4300ca1a7f809c6e00aadb03da.zip
restructure results
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+instruction: 0.730
+runtime: 0.183
+syscall: 0.087
+
+
+
+qemu doesn't seem to support lxvwsx for POWER9 target
+
+When running a simple program built for POWER9 on QEMU 3.0.0 in linux-user mode, it crashes with a message: "illegal instruction". It turns out that lxvwsx instruction "Load Word and Splat Indexed" is not supported. If workaround is implemented by issuing two separate instructions (first load then splat) then all tests pass correctly.
+
+Operating system: Ubuntu Mate 16.04.2 64-bit (or Linux Mint 18 64-bit).
+Cross-compiler for gcc-powerpc64le-linux-gnu is installed (gcc-5 series).
+QEMU 3.0.0 is built from source and installed with: sudo make install
+
+The program in question: https://github.com/VectorChief/UniSIMD-assembler
+Turn off the workaround: RT_ELEM_COMPAT_PW9 should be set to 1 in the following file:
+https://github.com/VectorChief/UniSIMD-assembler/blob/master/core/config/rtarch_p32_128x1v2.h
+
+Change to the "test" directory and type "make -f simd_make_p64.mk".
+powerpc64le-linux-gnu-objdump -d simd_test.p64_32Lp9 > simd_test_p64_32Lp9.txt
+Open newly created text file simd_test_p64_32Lp9.txt and search for lxvwsx (in s_test01, ...)
+The instruction shows up in objdump correctly.
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