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49 lines
909 B
49 lines
909 B
// SPDX-License-Identifier: GPL-2.0-only |
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/* IEEE754 floating point arithmetic |
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* double precision: common utilities |
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*/ |
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/* |
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* MIPS floating point support |
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* Copyright (C) 1994-2000 Algorithmics Ltd. |
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*/ |
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#include "ieee754dp.h" |
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union ieee754dp ieee754dp_neg(union ieee754dp x) |
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{ |
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union ieee754dp y; |
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if (ieee754_csr.abs2008) { |
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y = x; |
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DPSIGN(y) = !DPSIGN(x); |
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} else { |
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unsigned int oldrm; |
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oldrm = ieee754_csr.rm; |
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ieee754_csr.rm = FPU_CSR_RD; |
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y = ieee754dp_sub(ieee754dp_zero(0), x); |
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ieee754_csr.rm = oldrm; |
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} |
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return y; |
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} |
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union ieee754dp ieee754dp_abs(union ieee754dp x) |
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{ |
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union ieee754dp y; |
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if (ieee754_csr.abs2008) { |
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y = x; |
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DPSIGN(y) = 0; |
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} else { |
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unsigned int oldrm; |
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oldrm = ieee754_csr.rm; |
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ieee754_csr.rm = FPU_CSR_RD; |
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if (DPSIGN(x)) |
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y = ieee754dp_sub(ieee754dp_zero(0), x); |
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else |
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y = ieee754dp_add(ieee754dp_zero(0), x); |
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ieee754_csr.rm = oldrm; |
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} |
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return y; |
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}
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