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Diffstat (limited to '')
| -rw-r--r-- | arch/mips/math-emu/dp_simple.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/mips/math-emu/dp_simple.c b/arch/mips/math-emu/dp_simple.c new file mode 100644 index 000000000..b063aad7d --- /dev/null +++ b/arch/mips/math-emu/dp_simple.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* IEEE754 floating point arithmetic + * double precision: common utilities + */ +/* + * MIPS floating point support + * Copyright (C) 1994-2000 Algorithmics Ltd. + */ + +#include "ieee754dp.h" + +union ieee754dp ieee754dp_neg(union ieee754dp x) +{ + union ieee754dp y; + + if (ieee754_csr.abs2008) { + y = x; + DPSIGN(y) = !DPSIGN(x); + } else { + unsigned int oldrm; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + y = ieee754dp_sub(ieee754dp_zero(0), x); + ieee754_csr.rm = oldrm; + } + return y; +} + +union ieee754dp ieee754dp_abs(union ieee754dp x) +{ + union ieee754dp y; + + if (ieee754_csr.abs2008) { + y = x; + DPSIGN(y) = 0; + } else { + unsigned int oldrm; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + if (DPSIGN(x)) + y = ieee754dp_sub(ieee754dp_zero(0), x); + else + y = ieee754dp_add(ieee754dp_zero(0), x); + ieee754_csr.rm = oldrm; + } + return y; +} |