diff options
| author | Kenneth Graunke <[email protected]> | 2015-12-28 23:52:10 -0800 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2015-12-29 15:27:03 -0800 |
| commit | b10af36d93c44537bf0858d0508020058e375d34 (patch) | |
| tree | 2c18e39a3e80644838e8c00b4306984601893d83 /src | |
| parent | 6a0fa2d758bc67041f2b66c3b7520a0ca041817e (diff) | |
nir/spirv/glsl450: Implement SmoothStep.
Diffstat (limited to 'src')
| -rw-r--r-- | src/glsl/nir/spirv/vtn_glsl450.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/glsl/nir/spirv/vtn_glsl450.c b/src/glsl/nir/spirv/vtn_glsl450.c index cec7592a5e8..1b7751a6a88 100644 --- a/src/glsl/nir/spirv/vtn_glsl450.c +++ b/src/glsl/nir/spirv/vtn_glsl450.c @@ -176,6 +176,20 @@ handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint, return; } + case GLSLstd450SmoothStep: { + /* t = clamp((x - edge0) / (edge1 - edge0), 0, 1) */ + nir_ssa_def *t = + build_fclamp(nb, nir_fdiv(nb, nir_fsub(nb, src[2], src[0]), + nir_fsub(nb, src[1], src[0])), + nir_imm_float(nb, 0.0), nir_imm_float(nb, 1.0)); + /* result = t * t * (3 - 2 * t) */ + val->ssa->def = + nir_fmul(nb, t, nir_fmul(nb, t, + nir_fsub(nb, nir_imm_float(nb, 3.0), + nir_fmul(nb, nir_imm_float(nb, 2.0), t)))); + return; + } + case GLSLstd450Asin: case GLSLstd450Acos: case GLSLstd450Atan: @@ -186,7 +200,6 @@ handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint, case GLSLstd450Asinh: case GLSLstd450Acosh: case GLSLstd450Atanh: - case GLSLstd450SmoothStep: case GLSLstd450Frexp: case GLSLstd450PackDouble2x32: case GLSLstd450UnpackDouble2x32: |