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| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2025-04-19 08:07:58 -0600 |
|---|---|---|
| committer | Jeff Law <jlaw@ventanamicro.com> | 2025-04-19 08:07:58 -0600 |
| commit | 2a643f55f5acc05dcc7cee133647bf3193d5b563 (patch) | |
| tree | a5d50cd818a09759ac9ab1a1d46839e4a8d09cf9 /gcc | |
| parent | 6beb0a14aacd84ec49646237fc0f69c6765f956e (diff) | |
| download | gcc-2a643f55f5acc05dcc7cee133647bf3193d5b563.zip gcc-2a643f55f5acc05dcc7cee133647bf3193d5b563.tar.gz gcc-2a643f55f5acc05dcc7cee133647bf3193d5b563.tar.bz2 | |
[PATCH v2] sh: Correct NaN signalling bit and propagation rules [PR111814]
As per architecture, SuperH has a reversed NaN signalling bit
vs IEEE754-2008, it also has a NaN propgation rule similar to
MIPS style.
Use mips style float format and mode for all float types, and
correct sfp-machine header accordingly.
PR target/111814
gcc/ChangeLog:
* config/sh/sh-modes.def (RESET_FLOAT_FORMAT): Use mips format.
(FLOAT_MODE): Use mips mode.
libgcc/ChangeLog:
* config/sh/sfp-machine.h (_FP_NANFRAC_B): Reverse signaling bit.
(_FP_NANFRAC_H): Likewise.
(_FP_NANFRAC_S): Likewise.
(_FP_NANFRAC_D): Likewise.
(_FP_NANFRAC_Q): Likewise.
(_FP_KEEPNANFRACP): Enable for target.
(_FP_QNANNEGATEDP): Enable for target.
(_FP_CHOOSENAN): Port from MIPS.
gcc/testsuite/ChangeLog:
* gcc.target/sh/pr111814.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/sh/sh-modes.def | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/sh/pr111814.c | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/config/sh/sh-modes.def b/gcc/config/sh/sh-modes.def index 80650b4..e31ae69 100644 --- a/gcc/config/sh/sh-modes.def +++ b/gcc/config/sh/sh-modes.def @@ -17,6 +17,12 @@ You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ +/* SH has the same reversed quiet bit as MIPS. */ +RESET_FLOAT_FORMAT (SF, mips_single_format); +RESET_FLOAT_FORMAT (DF, mips_double_format); +/* TFmode: IEEE quad floating point (software). */ +FLOAT_MODE (TF, 16, mips_quad_format); + /* Vector modes. */ VECTOR_MODE (INT, QI, 2); /* V2QI */ VECTOR_MODES (INT, 4); /* V4QI V2HI */ diff --git a/gcc/testsuite/gcc.target/sh/pr111814.c b/gcc/testsuite/gcc.target/sh/pr111814.c new file mode 100644 index 0000000..a88e5d7 --- /dev/null +++ b/gcc/testsuite/gcc.target/sh/pr111814.c @@ -0,0 +1,7 @@ +/* Verify that __builtin_nan("") produces a constant matches + architecture specification. */ +/* { dg-do compile } */ + +double d = __builtin_nan (""); + +/* { dg-final { scan-assembler "\t.long\t-1\n\t.long\t2146959359\n" } } */ |