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MIPS: math-emu: Switch to using the MIPS rounding modes.

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Previously math-emu was using the IEEE-754 constants internally.  These
were differing by having the constants for rounding to +/- infinity
switched, so a conversion was necessary.  This would be entirely
avoidable if the MIPS constants were used throughout, so get rid of
the bloat.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2014-04-30 11:21:55 +02:00
parent aef3fb76aa
commit 56a6473339
15 changed files with 63 additions and 91 deletions
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8
arch/mips/math-emu/dp_tint.c
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@@ -74,17 +74,17 @@ int ieee754dp_tint(union ieee754dp x)
to be zero */
odd = (xm & 0x1) != 0x0;
switch (ieee754_csr.rm) {
case IEEE754_RN:
case FPU_CSR_RN:
if (round && (sticky || odd))
xm++;
break;
case IEEE754_RZ:
case FPU_CSR_RZ:
break;
case IEEE754_RU: /* toward +Infinity */
case FPU_CSR_RU: /* toward +Infinity */
if ((round || sticky) && !xs)
xm++;
break;
case IEEE754_RD: /* toward -Infinity */
case FPU_CSR_RD: /* toward -Infinity */
if ((round || sticky) && xs)
xm++;
break;