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Sun, 26 Jan 2025 05:32:28 -0800 (PST) Received: from [192.168.163.227] ([50.225.135.10]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f7ffaf80dfsm5145366a91.33.2025.01.26.05.32.27 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 26 Jan 2025 05:32:28 -0800 (PST) Message-ID: <5ebe9700-a454-4e32-98c7-3a4885f6e9b2@linaro.org> Date: Sun, 26 Jan 2025 05:32:26 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 76/76] tests/tcg/x86_64/fma: add test for exact-denormal output To: qemu-devel@nongnu.org References: <20250124162836.2332150-1-peter.maydell@linaro.org> <20250124162836.2332150-77-peter.maydell@linaro.org> Content-Language: en-US From: Richard Henderson In-Reply-To: <20250124162836.2332150-77-peter.maydell@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::1029; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1029.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 1/24/25 08:28, Peter Maydell wrote: > Add some fma test cases that check for correct handling of FTZ and > for the flag that indicates that the input denormal was consumed. > > Signed-off-by: Peter Maydell > --- > tests/tcg/x86_64/fma.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/tests/tcg/x86_64/fma.c b/tests/tcg/x86_64/fma.c > index 46f863005ed..34219614c0a 100644 > --- a/tests/tcg/x86_64/fma.c > +++ b/tests/tcg/x86_64/fma.c > @@ -82,6 +82,18 @@ static testdata tests[] = { > */ > { 0x3fdfffffffffffff, 0x001fffffffffffff, 0x801fffffffffffff, true, > 0x8010000000000000, 0x20 }, /* Enabling FTZ shouldn't change flags */ > + /* > + * normal * 0 + a denormal. With FTZ disabled this gives an exact > + * result (equal to the input denormal) that has consumed the denormal. > + */ > + { 0x3cc8000000000000, 0x0000000000000000, 0x8008000000000000, false, > + 0x8008000000000000, 0x2 }, /* Denormal */ > + /* > + * With FTZ enabled, this consumes the denormal, returns zero (because > + * flushed) and indicates also Underflow and Precision. > + */ > + { 0x3cc8000000000000, 0x0000000000000000, 0x8008000000000000, true, > + 0x8000000000000000, 0x32 }, /* Precision, Underflow, Denormal */ > }; > > int main(void) Reviewed-by: Richard Henderson r~