diff options
Diffstat (limited to 'generic/lib/integer/mul24.inc')
| -rw-r--r-- | generic/lib/integer/mul24.inc | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/generic/lib/integer/mul24.inc b/generic/lib/integer/mul24.inc new file mode 100644 index 0000000..95a2f1d --- /dev/null +++ b/generic/lib/integer/mul24.inc @@ -0,0 +1,11 @@ + +// We need to use shifts here in order to mantain the sign bit for signed +// integers. The compiler should optimize this to (x & 0x00FFFFFF) for +// unsigned integers. +#define CONVERT_TO_24BIT(x) (((x) << 8) >> 8) + +_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE mul24(__CLC_GENTYPE x, __CLC_GENTYPE y){ + return CONVERT_TO_24BIT(x) * CONVERT_TO_24BIT(y); +} + +#undef CONVERT_TO_24BIT |