hellerve/silleee
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Veit Heller
2017-08-09 15:03:00 -04:00
parent f168f8755a
commit 436005dc68
2 changed files with 6 additions and 6 deletions
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8
silleee.c
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@@ -29,7 +29,6 @@ silleee shift_and_round(int val, int bits) {
} }
silleee silleee_add(silleee x, silleee y) { silleee silleee_add(silleee x, silleee y) {
silleee dest = 0;
int dexp; int dexp;
long unsigned dmant; long unsigned dmant;
int dsign; int dsign;
@@ -57,8 +56,9 @@ silleee silleee_add(silleee x, silleee y) {
dexp = yexp; dexp = yexp;
if (yexp > xexp) xmant = shift_and_round(xmant, yexp-xexp); if (yexp > xexp) {
else if (yexp < xexp) { xmant = shift_and_round(xmant, yexp-xexp);
} else if (yexp < xexp) {
ymant = shift_and_round(ymant, xexp-yexp); ymant = shift_and_round(ymant, xexp-yexp);
dexp = xexp; dexp = xexp;
} }
@@ -81,7 +81,7 @@ silleee silleee_add(silleee x, silleee y) {
++dexp; ++dexp;
} else { } else {
if (dmant) { if (dmant) {
while (dmant < 0x800000 && dexp > -127) { while ((dmant < 0x800000) && (dexp > -127)) {
dmant <<= 1; dmant <<= 1;
--dexp; --dexp;
} }

4
silleee.h
View File

@@ -1,8 +1,8 @@
#define assilleee(x) (*((float *) &x)) #define assilleee(x) (*((float *) &x))
#define exponent(x) (((x >> 23) & 0xff) - 127) #define exponent(x) (((x >> 23) & 0xff) - 127)
#define sign_bit 1 << 31 #define sign_bit 1 << 31
#define sign(x) ((x & sign_bit) >> 31) #define sign(x) (x >> 31)
#define mantissa(x) ((x & 0x7fffffff) ? ((x & 0x7fffff) | sign_bit) : 0) #define mantissa(x) ((x & 0x7fffffff) ? ((x & 0x7fffff) | 0x800000) : 0)
#define pack_silleee(sign, exponent, mantissa) \ #define pack_silleee(sign, exponent, mantissa) \
((silleee)((sign<<31)|((exponent+127)<<23)|(mantissa&0x7fffff))) ((silleee)((sign<<31)|((exponent+127)<<23)|(mantissa&0x7fffff)))