Viewing file:  sn7153.c (1.76 KB) -rw-r--r--
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/* In the source code, the vec_adds appears before the call to
validate_sat(). In the .s code, the vaddubs has been moved to after
the call to validate_sat(). This invalidates the meaning of checking
the saturation bit. */
#include <stdio.h>
#include <stdlib.h>
#include <altivec.h>
static int failed;
void validate_sat();
void validate_u8(vector unsigned char, vector unsigned char);
int
main()
{
vector unsigned char result_u8;
vec_mtvscr(((vector unsigned short){0,0,0,0,0,0,0,0}));
result_u8 = vec_adds(((vector unsigned
char){0,1,2,3,0xfc,0xfd,0xfe,0xff,
0,1,2,3,0xfc,0xfd,0xfe,0xff}),
((vector unsigned
char){0,0xf0,0xfd,0xfd,2,2,2,2,0,
0xf0,0xfd,0xfd,2,2,2,2}));
validate_sat();
validate_u8(result_u8, ((vector unsigned
char){0,0xf1,0xff,0xff,0xfe,0xff,0xff,0xff,
0,0xf1,0xff,0xff,0xfe,0xff,0xff,0xff}));
if (failed)
abort ();
return 0;
}
void validate_sat()
{
#ifdef __LITTLE_ENDIAN__
if (vec_any_ne(vec_splat(vec_mfvscr(), 0), ((vector unsigned short){1,1,1,1,1,1,1,1})))
#else
if (vec_any_ne(vec_splat(vec_mfvscr(), 7), ((vector unsigned short){1,1,1,1,1,1,1,1})))
#endif
{
union {vector unsigned short v; unsigned short s[8];} u;
u.v = vec_mfvscr();
printf("error: vscr == { %d,%d,%d,%d,%d,%d,%d,%d }",
u.s[0], u.s[1], u.s[2], u.s[3],
u.s[4], u.s[5], u.s[6], u.s[7]);
printf("expected { 1,1,1,1,1,1,1,1 }\n");
failed++;
}
}
void validate_u8(vector unsigned char v, vector unsigned char vx)
{
union {vector unsigned char v; unsigned char x[16]; } u, ux;
int i;
u.v = v;
ux.v = vx;
for (i=0; i<16; i++) {
if (u.x[i] != ux.x[i]) {
printf(" error: field %d %#2.2x expected %#2.2x\n",
i, u.x[i], ux.x[i]);
failed++;
}
}
}
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