Fix error in fix16_lerp16 on platforms with sizeof(int) == 2.

Patch by georgjohann. Closes issue 20.

1 files changed, 2 insertions, 2 deletions

diff --git a/libfixmath/fix16.c b/libfixmath/fix16.c
index d5ff8a5..2994905 100644
--- a/libfixmath/fix16.c
+++ b/libfixmath/fix16.c
@@ -481,6 +481,7 @@ fix16_t fix16_mod(fix16_t x, fix16_t y)
 }

 

 

+#ifndef FIXMATH_NO_64BIT

 

 fix16_t fix16_lerp8(fix16_t inArg0, fix16_t inArg1, uint8_t inFract)

 {

@@ -492,13 +493,12 @@ fix16_t fix16_lerp8(fix16_t inArg0, fix16_t inArg1, uint8_t inFract)
 

 fix16_t fix16_lerp16(fix16_t inArg0, fix16_t inArg1, uint16_t inFract)

 {

-	int64_t tempOut = int64_mul_i32_i32(inArg0, ((1 << 16) - inFract));

+	int64_t tempOut = int64_mul_i32_i32(inArg0, (((int32_t)1 << 16) - inFract));

 	tempOut = int64_add(tempOut, int64_mul_i32_i32(inArg1, inFract));

 	tempOut = int64_shift(tempOut, -16);

 	return (fix16_t)int64_lo(tempOut);

 }

 

-#ifndef FIXMATH_NO_64BIT

 fix16_t fix16_lerp32(fix16_t inArg0, fix16_t inArg1, uint32_t inFract)

 {

 	int64_t tempOut;