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| author | Keith Packard <keithp@keithp.com> | 2020-01-20 22:46:36 -0800 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2020-01-21 10:28:35 +0100 |
| commit | 5377a847764461493c620644f6530892344d1cdd (patch) | |
| tree | fa3d943c9c83db67a13dc29e442a8b63e147b31e | |
| parent | 8e74c7119fb7f95662bb4986570a98496f259400 (diff) | |
| download | cygnal-5377a847764461493c620644f6530892344d1cdd.tar.gz cygnal-5377a847764461493c620644f6530892344d1cdd.tar.bz2 cygnal-5377a847764461493c620644f6530892344d1cdd.zip | |
riscv: Map between ieeefp.h exception bits and RISC-V FCSR bits
If we had architecture-specific exception bits, we could just set them
to match the processor, but instead ieeefp.h is shared by all targets
so we need to map between the public values and the register contents.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | newlib/libc/machine/riscv/ieeefp.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/newlib/libc/machine/riscv/ieeefp.c b/newlib/libc/machine/riscv/ieeefp.c index c45832280..60ecacfc2 100644 --- a/newlib/libc/machine/riscv/ieeefp.c +++ b/newlib/libc/machine/riscv/ieeefp.c @@ -40,6 +40,40 @@ frm_fp_rnd (unsigned frm) } } +static fp_except +frm_fp_except (unsigned except) +{ + fp_except fp = 0; + if (except & (1 << 0)) + fp |= FP_X_IMP; + if (except & (1 << 1)) + fp |= FP_X_UFL; + if (except & (1 << 2)) + fp |= FP_X_OFL; + if (except & (1 << 3)) + fp |= FP_X_DX; + if (except & (1 << 4)) + fp |= FP_X_INV; + return fp; +} + +static unsigned +frm_except(fp_except fp) +{ + unsigned except = 0; + if (fp & FP_X_IMP) + except |= (1 << 0); + if (fp & FP_X_UFL) + except |= (1 << 1); + if (fp & FP_X_OFL) + except |= (1 << 2); + if (fp & FP_X_DX) + except |= (1 << 3); + if (fp & FP_X_INV) + except |= (1 << 4); + return except; +} + #endif /* __riscv_flen */ fp_except @@ -63,7 +97,7 @@ fp_except fpgetsticky(void) { #ifdef __riscv_flen - return frsr () & 0x1f; + return frm_fp_except(frsr ()); #else return 0; #endif /* __riscv_flen */ @@ -102,8 +136,8 @@ fpsetsticky(fp_except sticky) { #ifdef __riscv_flen unsigned fsr = frsr (); - fssr (sticky & 0x1f | fsr & ~0x1f); - return fsr & 0x1f; + fssr (frm_except(sticky) | (fsr & ~0x1f)); + return frm_fp_except(fsr); #else return -1; #endif /* __riscv_flen */ |