diff options
Diffstat (limited to 'arch/mips/math-emu/sp_maddf.c')
| -rw-r--r-- | arch/mips/math-emu/sp_maddf.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/mips/math-emu/sp_maddf.c b/arch/mips/math-emu/sp_maddf.c index dd1dd83e34eb..93b7132d60e2 100644 --- a/arch/mips/math-emu/sp_maddf.c +++ b/arch/mips/math-emu/sp_maddf.c @@ -14,8 +14,12 @@ #include "ieee754sp.h" -union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x, - union ieee754sp y) +enum maddf_flags { + maddf_negate_product = 1 << 0, +}; + +static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x, + union ieee754sp y, enum maddf_flags flags) { int re; int rs; @@ -154,6 +158,8 @@ union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x, re = xe + ye; rs = xs ^ ys; + if (flags & maddf_negate_product) + rs ^= 1; /* shunt to top of word */ xm <<= 32 - (SP_FBITS + 1); @@ -253,3 +259,15 @@ union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x, } return ieee754sp_format(zs, ze, zm); } + +union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x, + union ieee754sp y) +{ + return _sp_maddf(z, x, y, 0); +} + +union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x, + union ieee754sp y) +{ + return _sp_maddf(z, x, y, maddf_negate_product); +} |