xemu-project/nv2a_vsh_cpu
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Fixes rsq.

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This commit is contained in:
Erik Abair 2022-06-23 14:28:19 -07:00
parent 155105ce3a
commit 246ed33acf
1 changed files with 12 additions and 18 deletions
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30
src/nv2a_vsh_cpu.c
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@ -178,24 +178,18 @@ void nv2a_vsh_cpu_rcc(float *out, const float *inputs) {
}
void nv2a_vsh_cpu_rsq(float *out, const float *inputs) {
// float in = COMP(inputs, 0, _X);
// float result;
// if (in == 1.0f) {
// result = 1.0f;
// } else if (in == 0.0f) {
// // nv2a preserves the sign.
// if (*(uint32_t*)&in & 0x80000000) {
// result = -INFINITY;
// } else {
// result = INFINITY;
// }
// } else {
// result = 1.0f / in;
// }
float result =
(inputs[0] == 1.0f
? 1.0f
: (inputs[0] == 0.0f ? INFINITY : 1.0f / sqrtf(inputs[0])));
float in = fabsf(inputs[0]);
float result;
if (in == 1.0f) {
result = 1.0f;
} else if (in == -1.0f) {
result = 1.0f;
} else if (in == 0.0f) {
result = INFINITY;
} else {
result = 1.0f / sqrtf(in);
}
out[0] = result;
out[1] = result;
out[2] = result;