diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/soabuiltins.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/soabuiltins.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/src/gallium/auxiliary/gallivm/soabuiltins.c b/src/gallium/auxiliary/gallivm/soabuiltins.c index 935283f962..b3bfebfe50 100644 --- a/src/gallium/auxiliary/gallivm/soabuiltins.c +++ b/src/gallium/auxiliary/gallivm/soabuiltins.c @@ -109,20 +109,6 @@ void pow(float4 *res, res[3] = res[0]; } -void lit(float4 *res, - float4 tmp0x, float4 tmp0y, float4 tmp0z, float4 tmp0w, - float4 tmp1x, float4 tmp1y, float4 tmp1z, float4 tmp1w) -{ - const float4 zerovec = (float4) {0, 0, 0, 0}; - float4 tmpx = tmp0x; - float4 tmpy = tmp0y; - - res[0] = (float4){1.0, 1.0, 1.0, 1.0}; - res[1] = tmpx; - res[2] = tmpy; - res[3] = (float4){1.0, 1.0, 1.0, 1.0}; -} - float4 minvec(float4 a, float4 b) { return (float4){(a.x < b.x) ? a.x : b.x, @@ -159,3 +145,26 @@ void max(float4 *res, res[2] = maxvec(tmp0z, tmp1z); res[3] = maxvec(tmp0w, tmp1w); } + + +void lit(float4 *res, + float4 tmp0x, float4 tmp0y, float4 tmp0z, float4 tmp0w) +{ + const float4 zerovec = (float4) {0, 0, 0, 0}; + const float4 min128 = (float4) {-128.f, -128.f, -128.f, -128.f}; + const float4 plus128 = (float4) {128.f, 128.f, 128.f, 128.f}; + + res[0] = (float4){1.0, 1.0, 1.0, 1.0}; + if (tmp0x.x > 0) { + float4 tmpx = maxvec(tmpx, zerovec); + float4 tmpy = maxvec(tmp0y, zerovec); + float4 tmpw = minvec(tmp0w, plus128); + tmpw = maxvec(tmpw, min128); + res[1] = tmpx; + res[2] = powvec(tmpy, tmpw); + } else { + res[1] = zerovec; + res[2] = zerovec; + } + res[3] = (float4){1.0, 1.0, 1.0, 1.0}; +} |