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Diffstat (limited to 'arch/mips/math-emu/sp_sub.c')
-rw-r--r--arch/mips/math-emu/sp_sub.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/arch/mips/math-emu/sp_sub.c b/arch/mips/math-emu/sp_sub.c
index 8592e49032b8..ec5f937a8b3e 100644
--- a/arch/mips/math-emu/sp_sub.c
+++ b/arch/mips/math-emu/sp_sub.c
@@ -37,19 +37,20 @@ union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y)
FLUSHYSP;
switch (CLPAIR(xc, yc)) {
- case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_QNAN):
case CLPAIR(IEEE754_CLASS_QNAN, IEEE754_CLASS_SNAN):
- case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_SNAN):
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_SNAN):
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_SNAN):
case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_SNAN):
case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_SNAN):
+ return ieee754sp_nanxcpt(y);
+
+ case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_SNAN):
+ case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_QNAN):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_ZERO):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_NORM):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_DNORM):
case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_INF):
- ieee754_setcx(IEEE754_INVALID_OPERATION);
- return ieee754sp_nanxcpt(ieee754sp_indef());
+ return ieee754sp_nanxcpt(x);
case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_QNAN):
case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_QNAN):
@@ -148,8 +149,6 @@ union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y)
/* generate 28 bit result of adding two 27 bit numbers
*/
xm = xm + ym;
- xe = xe;
- xs = xs;
if (xm >> (SP_FBITS + 1 + 3)) { /* carry out */
SPXSRSX1(); /* shift preserving sticky */
@@ -157,11 +156,8 @@ union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y)
} else {
if (xm >= ym) {
xm = xm - ym;
- xe = xe;
- xs = xs;
} else {
xm = ym - xm;
- xe = xe;
xs = ys;
}
if (xm == 0) {