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[88.21.201.17]) by smtp.gmail.com with ESMTPSA id b15sm3072688wmd.41.2021.03.12.08.25.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 08:25:01 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v3 5/5] tests/tcg/mips: Test user mode DMULT for the R5900 Date: Fri, 12 Mar 2021 17:24:34 +0100 Message-Id: <20210312162434.1869129-6-f4bug@amsat.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210312162434.1869129-1-f4bug@amsat.org> References: <20210312162434.1869129-1-f4bug@amsat.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32e; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wm1-x32e.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fredrik Noring , Richard Henderson , Aleksandar Rikalo , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Aurelien Jarno , "Maciej W . Rozycki" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Fredrik Noring The R5900 reports itself as MIPS III but does not implement DMULT. Verify that DMULT is emulated properly in user mode by multiplying two 64-bit numbers to produce a 128-bit number. Signed-off-by: Fredrik Noring Message-Id: [PMD: Moved to tests/tcg/mips/] Signed-off-by: Philippe Mathieu-Daudé --- tests/tcg/mips/test-r5900-dmult.c | 40 +++++++++++++++++++++++++++++++ tests/tcg/mips/Makefile.target | 11 ++++++--- 2 files changed, 48 insertions(+), 3 deletions(-) create mode 100644 tests/tcg/mips/test-r5900-dmult.c diff --git a/tests/tcg/mips/test-r5900-dmult.c b/tests/tcg/mips/test-r5900-dmult.c new file mode 100644 index 00000000000..2827ab5358f --- /dev/null +++ b/tests/tcg/mips/test-r5900-dmult.c @@ -0,0 +1,40 @@ +/* + * Test DMULT. + */ + +#include +#include +#include + +struct hi_lo { int64_t hi; uint64_t lo; }; + +static struct hi_lo dmult(int64_t rs, int64_t rt) +{ + int64_t hi; + uint64_t lo; + + /* + * The R5900 reports itself as MIPS III but does not implement DMULT. + * Verify that DMULT is emulated properly in user mode. + */ + __asm__ __volatile__ ( + " .set mips3\n" + " dmult %2, %3\n" + " mfhi %0\n" + " mflo %1\n" + : "=r" (hi), "=r" (lo) + : "r" (rs), "r" (rt)); + + return (struct hi_lo) { .hi = hi, .lo = lo }; +} + +int main() +{ + /* Verify that multiplying two 64-bit numbers yields a 128-bit number. */ + struct hi_lo r = dmult(2760727302517, 5665449960167); + + assert(r.hi == 847887); + assert(r.lo == 7893651516417804947); + + return 0; +} diff --git a/tests/tcg/mips/Makefile.target b/tests/tcg/mips/Makefile.target index 1a994d5525e..59e9d6fb76a 100644 --- a/tests/tcg/mips/Makefile.target +++ b/tests/tcg/mips/Makefile.target @@ -11,9 +11,14 @@ VPATH += $(MIPS_SRC) # hello-mips is 32 bit only ifeq ($(findstring 64,$(TARGET_NAME)),) MIPS_TESTS=hello-mips - -TESTS += $(MIPS_TESTS) - hello-mips: CFLAGS+=-mno-abicalls -fno-PIC -mabi=32 hello-mips: LDFLAGS+=-nostdlib endif + +# r5900 is only 64 bit little-endian +ifneq ($(findstring 64el,$(TARGET_NAME)),) +MIPS_TESTS += test-r5900-dmult +test-r5900-dmult: CFLAGS += -mabi=n32 -march=r5900 +endif + +TESTS += $(MIPS_TESTS) -- 2.26.2