From: Max Filippov <jcmvbkbc@gmail.com>
To: qemu-devel@nongnu.org
Cc: "Max Filippov" <jcmvbkbc@gmail.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Peter Maydell" <peter.maydell@linaro.org>
Subject: [PATCH 03/21] softfloat: add xtensa specialization for pickNaNMulAdd
Date: Mon, 6 Jul 2020 16:47:19 -0700 [thread overview]
Message-ID: <20200706234737.32378-4-jcmvbkbc@gmail.com> (raw)
In-Reply-To: <20200706234737.32378-1-jcmvbkbc@gmail.com>
pickNaNMulAdd logic on Xtensa is the same as pickNaN when applied to
the expression (a * b) + c. So with two pickNaN variants there must be
two pickNaNMulAdd variants.
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Alex Bennée" <alex.bennee@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
fpu/softfloat-specialize.inc.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/fpu/softfloat-specialize.inc.c b/fpu/softfloat-specialize.inc.c
index e17327b405c5..6b07d50efad3 100644
--- a/fpu/softfloat-specialize.inc.c
+++ b/fpu/softfloat-specialize.inc.c
@@ -574,6 +574,24 @@ static int pickNaNMulAdd(FloatClass a_cls, FloatClass b_cls, FloatClass c_cls,
} else {
return 1;
}
+#elif defined(TARGET_XTENSA)
+ if (status->use_first_nan) {
+ if (is_nan(a_cls)) {
+ return 0;
+ } else if (is_nan(b_cls)) {
+ return 1;
+ } else {
+ return 2;
+ }
+ } else {
+ if (is_nan(c_cls)) {
+ return 2;
+ } else if (is_nan(b_cls)) {
+ return 1;
+ } else {
+ return 0;
+ }
+ }
#else
/* A default implementation: prefer a to b to c.
* This is unlikely to actually match any real implementation.
--
2.20.1
next prev parent reply other threads:[~2020-07-06 23:48 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 23:47 [PATCH 00/21] target/xtensa: implement double precision FPU Max Filippov
2020-07-06 23:47 ` [PATCH 01/21] softfloat: make NO_SIGNALING_NANS runtime property Max Filippov
2020-07-07 10:28 ` Alex Bennée
2020-07-08 17:41 ` Philippe Mathieu-Daudé
2020-07-06 23:47 ` [PATCH 02/21] softfloat: pass float_status pointer to pickNaN Max Filippov
2020-07-07 10:29 ` Alex Bennée
2020-07-06 23:47 ` Max Filippov [this message]
2020-07-07 10:29 ` [PATCH 03/21] softfloat: add xtensa specialization for pickNaNMulAdd Alex Bennée
2020-07-08 16:07 ` Richard Henderson
2020-07-08 18:11 ` Max Filippov
2020-07-06 23:47 ` [PATCH 04/21] target/xtensa: add geometry to xtensa_get_regfile_by_name Max Filippov
2020-07-06 23:47 ` [PATCH 05/21] target/xtensa: support copying registers up to 64 bits wide Max Filippov
2020-07-08 16:14 ` Richard Henderson
2020-07-08 17:14 ` Max Filippov
2020-07-06 23:47 ` [PATCH 06/21] target/xtensa: rename FPU2000 translators and helpers Max Filippov
2020-07-08 16:18 ` Richard Henderson
2020-07-06 23:47 ` [PATCH 07/21] target/xtensa: move FSR/FCR register accessors Max Filippov
2020-07-08 16:18 ` Richard Henderson
2020-07-06 23:47 ` [PATCH 08/21] target/xtensa: don't access BR regfile directly Max Filippov
2020-07-08 16:18 ` Richard Henderson
2020-07-06 23:47 ` [PATCH 09/21] target/xtensa: add DFP option, registers and opcodes Max Filippov
2020-07-08 16:25 ` Richard Henderson
2020-07-08 17:37 ` Max Filippov
2020-07-09 0:19 ` Richard Henderson
2020-07-09 5:14 ` Max Filippov
2020-07-06 23:47 ` [PATCH 10/21] target/xtensa: implement FPU division and square root Max Filippov
2020-07-06 23:47 ` [PATCH 11/21] tests/tcg/xtensa: fix test execution on ISS Max Filippov
2020-07-06 23:47 ` [PATCH 12/21] tests/tcg/xtensa: update test_fp0_arith for DFPU Max Filippov
2020-07-06 23:47 ` [PATCH 13/21] tests/tcg/xtensa: expand madd tests Max Filippov
2020-07-06 23:47 ` [PATCH 14/21] tests/tcg/xtensa: update test_fp0_conv for DFPU Max Filippov
2020-07-06 23:47 ` [PATCH 15/21] tests/tcg/xtensa: update test_fp1 " Max Filippov
2020-07-06 23:47 ` [PATCH 16/21] tests/tcg/xtensa: update test_lsc " Max Filippov
2020-07-06 23:47 ` [PATCH 17/21] tests/tcg/xtensa: add fp0 div and sqrt tests Max Filippov
2020-07-06 23:47 ` [PATCH 18/21] tests/tcg/xtensa: test double precision load/store Max Filippov
2020-07-06 23:47 ` [PATCH 19/21] tests/tcg/xtensa: add DFP0 arith tests Max Filippov
2020-07-06 23:47 ` [PATCH 20/21] target/xtensa: import DE_233L_FPU core Max Filippov
2020-07-06 23:47 ` [PATCH 21/21] target/xtensa: import DSP3400 core Max Filippov
2020-07-07 11:31 ` [PATCH 00/21] target/xtensa: implement double precision FPU Alex Bennée
2020-07-07 16:56 ` Max Filippov
2020-07-07 19:21 ` Alex Bennée
2020-07-07 23:14 ` Max Filippov
2020-07-08 8:50 ` Alex Bennée
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