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[sw] added mstatus.SD and mstatus.FS bits

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stnolting 2021-08-05 17:31:08 +02:00
parent 32826d2183
commit 5d39d65e8c
3 changed files with 11 additions and 2 deletions
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6
sw/example/floating_point_test/main.c
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@ -148,9 +148,13 @@ int main() {
neorv32_uart_printf("Test cases per instruction: %u\n", (uint32_t)NUM_TEST_CASES);
neorv32_uart_printf("NOTE: The NEORV32 FPU does not support subnormal numbers yet. Subnormal numbers are flushed to zero.\n\n");
// enable FPU extension
uint32_t mstatus = neorv32_cpu_csr_read(CSR_MSTATUS);
mstatus |= 1 << CSR_MSTATUS_FS_L; // state = initial
neorv32_cpu_csr_write(CSR_MSTATUS, mstatus);
// clear exception status word
neorv32_cpu_csr_write(CSR_FFLAGS, 0);; // real hardware
neorv32_cpu_csr_write(CSR_FFLAGS, 0); // real hardware
feclearexcept(FE_ALL_EXCEPT); // software runtime (GCC floating-point emulation)