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gallium: add special cases in spe_load_float(), spe_load_int(), added spe_splat()

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This commit is contained in:
Brian Paul 2008-09-11 17:07:30 -06:00
parent be925ab6e8
commit 178bbaff80
2 changed files with 40 additions and 9 deletions
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45
src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c
View file

@ -473,21 +473,48 @@ EMIT_R (spe_mtspr, 0x10c);
void
spe_load_float(struct spe_function *p, unsigned rT, float x)
{
union {
float f;
unsigned u;
} bits;
bits.f = x;
spe_ilhu(p, rT, bits.u >> 16);
spe_iohl(p, rT, bits.u & 0xffff);
if (x == 0.0f) {
spe_il(p, rT, 0x0);
}
else if (x == 0.5f) {
spe_ilhu(p, rT, 0x3f00);
}
else if (x == 1.0f) {
spe_ilhu(p, rT, 0x3f80);
}
else if (x == -1.0f) {
spe_ilhu(p, rT, 0xbf80);
}
else {
union {
float f;
unsigned u;
} bits;
bits.f = x;
spe_ilhu(p, rT, bits.u >> 16);
spe_iohl(p, rT, bits.u & 0xffff);
}
}
void
spe_load_int(struct spe_function *p, unsigned rT, int i)
{
spe_ilhu(p, rT, i >> 16);
spe_iohl(p, rT, i & 0xffff);
if (-32768 <= i && i <= 32767) {
spe_il(p, rT, i);
}
else {
spe_ilhu(p, rT, i >> 16);
spe_iohl(p, rT, i & 0xffff);
}
}
void
spe_splat(struct spe_function *p, unsigned rT, unsigned rA)
{
spe_ila(p, rT, 66051);
spe_shufb(p, rT, rA, rA, rT);
}

4
src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h
View file

@ -292,6 +292,10 @@ spe_load_float(struct spe_function *p, unsigned rT, float x);
extern void
spe_load_int(struct spe_function *p, unsigned rT, int i);
/** Replicate word 0 of rA across rT. */
extern void
spe_splat(struct spe_function *p, unsigned rT, unsigned rA);
/** Complement/invert all bits in rT. */
extern void
spe_complement(struct spe_function *p, unsigned rT);