diff options
Diffstat (limited to 'arch/mips/math-emu/sp_simple.c')
| -rw-r--r-- | arch/mips/math-emu/sp_simple.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/mips/math-emu/sp_simple.c b/arch/mips/math-emu/sp_simple.c new file mode 100644 index 0000000000..b9e91da7df --- /dev/null +++ b/arch/mips/math-emu/sp_simple.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* IEEE754 floating point arithmetic + * single precision + */ +/* + * MIPS floating point support + * Copyright (C) 1994-2000 Algorithmics Ltd. + */ + +#include "ieee754sp.h" + +union ieee754sp ieee754sp_neg(union ieee754sp x) +{ + union ieee754sp y; + + if (ieee754_csr.abs2008) { + y = x; + SPSIGN(y) = !SPSIGN(x); + } else { + unsigned int oldrm; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + y = ieee754sp_sub(ieee754sp_zero(0), x); + ieee754_csr.rm = oldrm; + } + return y; +} + +union ieee754sp ieee754sp_abs(union ieee754sp x) +{ + union ieee754sp y; + + if (ieee754_csr.abs2008) { + y = x; + SPSIGN(y) = 0; + } else { + unsigned int oldrm; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + if (SPSIGN(x)) + y = ieee754sp_sub(ieee754sp_zero(0), x); + else + y = ieee754sp_add(ieee754sp_zero(0), x); + ieee754_csr.rm = oldrm; + } + return y; +} |