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| author | Richard Henderson <richard.henderson@linaro.org> | 2022-08-06 10:04:44 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2022-08-08 19:42:53 -0700 |
| commit | 10dcb08b03863221faa41f4f1aa835cdca441b96 (patch) | |
| tree | c4945ccad293e7454842baeea9d57749c8561164 /tests | |
| parent | 7b06148df8a22d984e77e796322aeb5901dc653c (diff) | |
| download | focaccia-qemu-10dcb08b03863221faa41f4f1aa835cdca441b96.tar.gz focaccia-qemu-10dcb08b03863221faa41f4f1aa835cdca441b96.zip | |
target/loongarch: Remove cpu_fcsr0
All of the fpu operations are defined with TCG_CALL_NO_WG, but they all modify FCSR0. The most efficient way to fix this is to remove cpu_fcsr0, and instead use explicit load and store operations for the two instructions that manipulate that value. Acked-by: Qi Hu <huqi@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Reported-by: Feiyang Chen <chenfeiyang@loongson.cn> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/tcg/loongarch64/Makefile.target | 1 | ||||
| -rw-r--r-- | tests/tcg/loongarch64/test_fcsr.c | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/tests/tcg/loongarch64/Makefile.target b/tests/tcg/loongarch64/Makefile.target index 0115de78ef..00030a1026 100644 --- a/tests/tcg/loongarch64/Makefile.target +++ b/tests/tcg/loongarch64/Makefile.target @@ -15,5 +15,6 @@ LOONGARCH64_TESTS += test_div LOONGARCH64_TESTS += test_fclass LOONGARCH64_TESTS += test_fpcom LOONGARCH64_TESTS += test_pcadd +LOONGARCH64_TESTS += test_fcsr TESTS += $(LOONGARCH64_TESTS) diff --git a/tests/tcg/loongarch64/test_fcsr.c b/tests/tcg/loongarch64/test_fcsr.c new file mode 100644 index 0000000000..ad3609eb99 --- /dev/null +++ b/tests/tcg/loongarch64/test_fcsr.c @@ -0,0 +1,15 @@ +#include <assert.h> + +int main() +{ + unsigned fcsr; + + asm("movgr2fcsr $r0,$r0\n\t" + "movgr2fr.d $f0,$r0\n\t" + "fdiv.d $f0,$f0,$f0\n\t" + "movfcsr2gr %0,$r0" + : "=r"(fcsr) : : "f0"); + + assert(fcsr & (16 << 16)); /* Invalid */ + return 0; +} |