TST: Fix test_numeric on riscv64 #25618
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Modify test_numeric so that it passes on riscv64. The subtest TestBoolCmp::test_float currently fails on riscv64 as it assumes that the sign of -np.nan is retained when stored to and read back from an array. This is not always the case on riscv64. Many RISC-V instructions that produce NaNs return a canonical NaN, as defined by the RISC-V specification. The canonical NaNs are always positive. In this particular test the negative sign of the -np.nan is lost when it is converted from a double to a float before being stored in self.signf. We disable the float32 sign tests for -np.nan on riscv64 allowing test_numeric to pass.
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Backport of #25430.
Modify test_numeric so that it passes on riscv64. The subtest TestBoolCmp::test_float currently fails on riscv64 as it assumes that the sign of -np.nan is retained when stored to and read back from an array. This is not always the case on riscv64. Many RISC-V instructions that produce NaNs return a canonical NaN, as defined by the RISC-V specification. The canonical NaNs are always positive. In this particular test the negative sign of the -np.nan is lost when it is converted from a double to a float before being stored in self.signf. We disable the float32 sign tests for -np.nan on riscv64 allowing test_numeric to pass.