xemu-project/nv2a_vsh_cpu
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Fixes RCC.

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This commit is contained in:
Erik Abair 2022-06-23 14:46:03 -07:00
parent 246ed33acf
commit 413d24ee86
1 changed files with 20 additions and 13 deletions
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33
src/nv2a_vsh_cpu.c
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@ -153,24 +153,33 @@ void nv2a_vsh_cpu_rcp(float *out, const float *inputs) {
out[3] = result;
}
static const uint32_t kRCCMaxInt = 0x5F800000;
static const uint32_t kRCCMaxNegInt = 0xDF800000;
#include <assert.h>
void nv2a_vsh_cpu_rcc(float *out, const float *inputs) {
// TODO: Validate this on HW.
float result;
if (COMP(inputs, 0, _X) == 1.0f) {
float in = COMP(inputs, 0, _X);
if (in == 1.0f) {
result = 1.0f;
} else {
if (COMP(inputs, 0, _X) < -1.84467e19f) {
result = 1.0f / -1.84467e19f;
} else if (COMP(inputs, 0, _X) > -5.42101e-20f && COMP(inputs, 0, _X) < 0.0f) {
result = 1.0f / -5.42101e-020f;
} else if (COMP(inputs, 0, _X) >= 0 && COMP(inputs, 0, _X) < 5.42101e-20f) {
result = 1.0f / 5.42101e-20f;
} else if (COMP(inputs, 0, _X) > 1.84467e+19f) {
result = 1.0f / 1.84467e+19f;
result = 1.0f / in;
if (result > 0.0f) {
if (result < 5.42101e-020f) {
result = 5.42101e-020f;
} else if (result > 1.884467e+019f) {
result = *(float*)&kRCCMaxInt;
}
} else {
result = 1.0f / COMP(inputs, 0, _X);
if (result < -1.884467e+019f) {
result = *(float*)&kRCCMaxNegInt;
} else if (result > -5.42101e-020f) {
result = -5.42101e-020f;
}
}
}
out[0] = result;
out[1] = result;
out[2] = result;
@ -182,8 +191,6 @@ void nv2a_vsh_cpu_rsq(float *out, const float *inputs) {
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 {