diff options
Diffstat (limited to 'src/mesa/shader')
| -rw-r--r-- | src/mesa/shader/slang/slang_codegen.c | 95 |
1 files changed, 68 insertions, 27 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c index fe6b615c5d..06bceea7d0 100644 --- a/src/mesa/shader/slang/slang_codegen.c +++ b/src/mesa/shader/slang/slang_codegen.c @@ -107,54 +107,84 @@ _slang_field_offset(const slang_type_specifier *spec, slang_atom field) } +/** + * Return the size (in floats) of the given type specifier. + * If the size is greater than 4, the size should be a multiple of 4 + * so that the correct number of 4-float registers are allocated. + * For example, a mat3x2 is size 12 because we want to store the + * 3 columns in 3 float[4] registers. + */ GLuint _slang_sizeof_type_specifier(const slang_type_specifier *spec) { + GLuint sz; switch (spec->type) { case SLANG_SPEC_VOID: - return 0; + sz = 0; + break; case SLANG_SPEC_BOOL: - return 1; + sz = 1; + break; case SLANG_SPEC_BVEC2: - return 2; + sz = 2; + break; case SLANG_SPEC_BVEC3: - return 3; + sz = 3; + break; case SLANG_SPEC_BVEC4: - return 4; + sz = 4; + break; case SLANG_SPEC_INT: - return 1; + sz = 1; + break; case SLANG_SPEC_IVEC2: - return 2; + sz = 2; + break; case SLANG_SPEC_IVEC3: - return 3; + sz = 3; + break; case SLANG_SPEC_IVEC4: - return 4; + sz = 4; + break; case SLANG_SPEC_FLOAT: - return 1; + sz = 1; + break; case SLANG_SPEC_VEC2: - return 2; + sz = 2; + break; case SLANG_SPEC_VEC3: - return 3; + sz = 3; + break; case SLANG_SPEC_VEC4: - return 4; + sz = 4; + break; case SLANG_SPEC_MAT2: - return 2 * 2; + sz = 2 * 4; /* 2 columns (regs) */ + break; case SLANG_SPEC_MAT3: - return 3 * 3; + sz = 3 * 4; + break; case SLANG_SPEC_MAT4: - return 4 * 4; + sz = 4 * 4; + break; case SLANG_SPEC_MAT23: - return 2 * 4; /* special case */ + sz = 2 * 4; /* 2 columns (regs) */ + break; case SLANG_SPEC_MAT32: - return 3 * 4; /* special case: 3 registers (columns), not two */ + sz = 3 * 4; /* 3 columns (regs) */ + break; case SLANG_SPEC_MAT24: - return 2 * 4; + sz = 2 * 4; + break; case SLANG_SPEC_MAT42: - return 4 * 4; /* special case: 4 registers (columns), not two */ + sz = 4 * 4; /* 4 columns (regs) */ + break; case SLANG_SPEC_MAT34: - return 3 * 4; + sz = 3 * 4; + break; case SLANG_SPEC_MAT43: - return 4 * 4; /* special case: 4 registers (columns), not two */ + sz = 4 * 4; /* 4 columns (regs) */ + break; case SLANG_SPEC_SAMPLER1D: case SLANG_SPEC_SAMPLER2D: case SLANG_SPEC_SAMPLER3D: @@ -163,16 +193,27 @@ _slang_sizeof_type_specifier(const slang_type_specifier *spec) case SLANG_SPEC_SAMPLER2DSHADOW: case SLANG_SPEC_SAMPLER2DRECT: case SLANG_SPEC_SAMPLER2DRECTSHADOW: - return 1; /* a sampler is basically just an integer index */ + sz = 1; /* a sampler is basically just an integer index */ + break; case SLANG_SPEC_STRUCT: - return _slang_field_offset(spec, 0); /* special use */ + sz = _slang_field_offset(spec, 0); /* special use */ + if (sz > 4) { + sz = (sz + 3) & ~0x3; /* round up to multiple of four */ + } + break; case SLANG_SPEC_ARRAY: - return _slang_sizeof_type_specifier(spec->_array); + sz = _slang_sizeof_type_specifier(spec->_array); + break; default: _mesa_problem(NULL, "Unexpected type in _slang_sizeof_type_specifier()"); - return 0; + sz = 0; + } + + if (sz > 4) { + /* if size is > 4, it should be a multiple of four */ + assert((sz & 0x3) == 0); } - return 0; + return sz; } |