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We can't use S2 or D1. Use alternative means.

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This commit is contained in:
Sacha
2013-06-10 19:28:40 +10:00
parent 7b8331f50d
commit 2450c0d28d
2 changed files with 16 additions and 36 deletions
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32
Core/MIPS/ARM/ArmCompVFPU.cpp
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@@ -171,19 +171,19 @@ namespace MIPSComp
// clamped = fabs(x) - fabs(x-0.5f) + 0.5f; // [ 0, 1]
fpr.MapRegV(vregs[i], MAP_DIRTY);
MOVI2F(S0, 0.5f, R0);
VABS(S1, fpr.V(vregs[i])); // S1 = fabs(x)
VSUB(S2, fpr.V(vregs[i]), S0); // S2 = fabs(x-0.5f) {VABD}
VABS(S2, S2);
VSUB(fpr.V(vregs[i]), S1, S2); // v[i] = S1 - S2 + 0.5f
VABS(S1, fpr.V(vregs[i])); // S1 = fabs(x)
VSUB(fpr.V(vregs[i]), fpr.V(vregs[i]), S0); // S2 = fabs(x-0.5f) {VABD}
VABS(fpr.V(vregs[i]), fpr.V(vregs[i]));
VSUB(fpr.V(vregs[i]), S1, fpr.V(vregs[i])); // v[i] = S1 - S2 + 0.5f
VADD(fpr.V(vregs[i]), fpr.V(vregs[i]), S0);
} else if (sat == 3) {
// clamped = fabs(x) - fabs(x-1.0f); // [-1, 1]
fpr.MapRegV(vregs[i], MAP_DIRTY);
MOVI2F(S0, 1.0f, R0);
VABS(S1, fpr.V(vregs[i])); // S1 = fabs(x)
VSUB(S2, fpr.V(vregs[i]), S0); // S2 = fabs(x-1.0f) {VABD}
VABS(S2, S2);
VSUB(fpr.V(vregs[i]), S1, S2); // v[i] = S1 - S2
VABS(S1, fpr.V(vregs[i])); // S1 = fabs(x)
VSUB(fpr.V(vregs[i]), fpr.V(vregs[i]), S0); // S2 = fabs(x-1.0f) {VABD}
VABS(fpr.V(vregs[i]), fpr.V(vregs[i]));
VSUB(fpr.V(vregs[i]), S1, fpr.V(vregs[i])); // v[i] = S1 - S2
}
}
}
@@ -560,18 +560,18 @@ namespace MIPSComp
break;
case 4: // if (s[i] < 0) d[i] = 0; else {if(s[i] > 1.0f) d[i] = 1.0f; else d[i] = s[i];} break; // vsat0
MOVI2F(S0, 0.5f, R0);
VABS(S1, fpr.V(sregs[i])); // S1 = fabs(x)
VSUB(S2, fpr.V(sregs[i]), S0); // S2 = fabs(x-0.5f) {VABD}
VABS(S2, S2);
VSUB(fpr.V(tempxregs[i]), S1, S2); // v[i] = S1 - S2 + 0.5f
VABS(S1, fpr.V(sregs[i])); // S1 = fabs(x)
VSUB(fpr.V(tempxregs[i]), fpr.V(sregs[i]), S0); // S2 = fabs(x-0.5f) {VABD}
VABS(fpr.V(tempxregs[i]), fpr.V(tempxregs[i]));
VSUB(fpr.V(tempxregs[i]), S1, fpr.V(tempxregs[i])); // v[i] = S1 - S2 + 0.5f
VADD(fpr.V(tempxregs[i]), fpr.V(tempxregs[i]), S0);
break;
case 5: // if (s[i] < -1.0f) d[i] = -1.0f; else {if(s[i] > 1.0f) d[i] = 1.0f; else d[i] = s[i];} break; // vsat1
MOVI2F(S0, 1.0f, R0);
VABS(S1, fpr.V(sregs[i])); // S1 = fabs(x)
VSUB(S2, fpr.V(sregs[i]), S0); // S2 = fabs(x-1.0f) {VABD}
VABS(S2, S2);
VSUB(fpr.V(tempxregs[i]), S1, S2); // v[i] = S1 - S2
VABS(S1, fpr.V(sregs[i])); // S1 = fabs(x)
VSUB(fpr.V(tempxregs[i]), fpr.V(sregs[i]), S0); // S2 = fabs(x-1.0f) {VABD}
VABS(fpr.V(tempxregs[i]), fpr.V(tempxregs[i]));
VSUB(fpr.V(tempxregs[i]), S1, fpr.V(tempxregs[i])); // v[i] = S1 - S2
break;
case 16: // d[i] = 1.0f / s[i]; break; //vrcp
MOVI2F(S0, 1.0f, R0);