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Add WORD array to MMX union and static assertions to ensure data type packing is arranged as expected

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Jonathan Campbell
2021-11-23 13:35:26 -08:00
parent f1019a6d9f
commit b8ef06d410
1 changed files with 15 additions and 0 deletions
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15
include/mmx.h
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@@ -29,50 +29,65 @@ typedef union {
struct {
uint32_t d0,d1;
} ud;
static_assert(sizeof(ud) == 8, "MMX packing error");
struct {
int32_t d0,d1;
} sd;
static_assert(sizeof(sd) == 8, "MMX packing error");
struct {
uint16_t w0,w1,w2,w3;
} uw;
static_assert(sizeof(uw) == 8, "MMX packing error");
uint16_t uwa[4]; /* for PSHUFW */
static_assert(sizeof(uwa) == 8, "MMX packing error");
struct {
int16_t w0,w1,w2,w3;
} sw;
static_assert(sizeof(sw) == 8, "MMX packing error");
struct {
uint8_t b0,b1,b2,b3,b4,b5,b6,b7;
} ub;
static_assert(sizeof(ub) == 8, "MMX packing error");
struct {
int8_t b0,b1,b2,b3,b4,b5,b6,b7;
} sb;
static_assert(sizeof(sb) == 8, "MMX packing error");
#else
struct {
uint32_t d1,d0;
} ud;
static_assert(sizeof(ud) == 8, "MMX packing error");
struct {
int32_t d1,d0;
} sd;
static_assert(sizeof(sd) == 8, "MMX packing error");
struct {
uint16_t w3,w2,w1,w0;
} uw;
static_assert(sizeof(uw) == 8, "MMX packing error");
struct {
uint16_t w3,w2,w1,w0;
} sw;
static_assert(sizeof(sw) == 8, "MMX packing error");
struct {
uint8_t b7,b6,b5,b4,b3,b2,b1,b0;
} ub;
static_assert(sizeof(ub) == 8, "MMX packing error");
struct {
uint8_t b7,b6,b5,b4,b3,b2,b1,b0;
} sb;
static_assert(sizeof(sb) == 8, "MMX packing error");
#endif
} MMX_reg;