diff options
Diffstat (limited to 'src/mesa/shader')
| -rw-r--r-- | src/mesa/shader/prog_execute.c | 119 |
1 files changed, 115 insertions, 4 deletions
diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c index 82c578f9830..91ea52070e3 100644 --- a/src/mesa/shader/prog_execute.c +++ b/src/mesa/shader/prog_execute.c @@ -53,6 +53,27 @@ #define DEBUG_PROG 0 +/** + * Set x to positive or negative infinity. + */ +#if defined(USE_IEEE) || defined(_WIN32) +#define SET_POS_INFINITY(x) ( *((GLuint *) (void *)&x) = 0x7F800000 ) +#define SET_NEG_INFINITY(x) ( *((GLuint *) (void *)&x) = 0xFF800000 ) +#elif defined(VMS) +#define SET_POS_INFINITY(x) x = __MAXFLOAT +#define SET_NEG_INFINITY(x) x = -__MAXFLOAT +#else +#define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL +#define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL +#endif + +#define SET_FLOAT_BITS(x, bits) ((fi_type *) (void *) &(x))->i = bits + + +static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F }; + + + #if FEATURE_MESA_program_debug static struct gl_program_machine *CurrentMachine = NULL; @@ -102,6 +123,24 @@ get_register_pointer(GLcontext * ctx, const struct gl_program_machine *machine) { /* XXX relative addressing... */ + + if (source->RelAddr) { + const GLint reg = source->Index + machine->AddressReg[0][0]; + ASSERT( (source->File == PROGRAM_ENV_PARAM) || + (source->File == PROGRAM_STATE_VAR) ); + if (reg < 0 || reg > MAX_NV_VERTEX_PROGRAM_PARAMS) + return ZeroVec; + else if (source->File == PROGRAM_ENV_PARAM) + return ctx->VertexProgram.Parameters[reg]; + else { + /* + ASSERT(source->File == PROGRAM_LOCAL_PARAM); + */ + return machine->CurProgram->Parameters->ParameterValues[reg]; + } + } + + switch (source->File) { case PROGRAM_TEMPORARY: ASSERT(source->Index < MAX_PROGRAM_TEMPS); @@ -665,6 +704,13 @@ _mesa_execute_program(GLcontext * ctx, } } break; + case OPCODE_ARL: + { + GLfloat t[4]; + fetch_vector4(ctx, &inst->SrcReg[0], machine, t); + machine->AddressReg[0][0] = (GLint) FLOORF(t[0]); + } + break; case OPCODE_BGNLOOP: /* no-op */ break; @@ -746,8 +792,7 @@ _mesa_execute_program(GLcontext * ctx, } store_vector4(inst, machine, result); #else - static const GLfloat result[4] = { 0, 0, 0, 0 }; - store_vector4(inst, machine, result); + store_vector4(inst, machine, ZeroVec); #endif } break; @@ -771,8 +816,7 @@ _mesa_execute_program(GLcontext * ctx, } store_vector4(inst, machine, result); #else - static const GLfloat result[4] = { 0, 0, 0, 0 }; - store_vector4(inst, machine, result); + store_vector4(inst, machine, ZeroVec); #endif } break; @@ -825,6 +869,36 @@ _mesa_execute_program(GLcontext * ctx, store_vector4(inst, machine, result); } break; + case OPCODE_EXP: + /* XXX currently broken! */ + { + GLfloat t[4], q[4], floor_t0; + fetch_vector1(ctx, &inst->SrcReg[0], machine, t); + floor_t0 = FLOORF(t[0]); + if (floor_t0 > FLT_MAX_EXP) { + SET_POS_INFINITY(q[0]); + SET_POS_INFINITY(q[2]); + } + else if (floor_t0 < FLT_MIN_EXP) { + q[0] = 0.0F; + q[2] = 0.0F; + } + else { +#ifdef USE_IEEE + GLint ii = (GLint) floor_t0; + ii = (ii < 23) + 0x3f800000; + SET_FLOAT_BITS(q[0], ii); + q[0] = *((GLfloat *) (void *)&ii); +#else + q[0] = (GLfloat) pow(2.0, floor_t0); +#endif + q[2] = (GLfloat) (q[0] * LOG2(q[1])); + } + q[1] = t[0] - floor_t0; + q[3] = 1.0F; + store_vector4( inst, machine, q ); + } + break; case OPCODE_EX2: /* Exponential base 2 */ { GLfloat a[4], result[4]; @@ -937,6 +1011,43 @@ _mesa_execute_program(GLcontext * ctx, } } break; + case OPCODE_LOG: + { + GLfloat t[4], q[4], abs_t0; + fetch_vector1(ctx, &inst->SrcReg[0], machine, t); + abs_t0 = FABSF(t[0]); + if (abs_t0 != 0.0F) { + /* Since we really can't handle infinite values on VMS + * like other OSes we'll use __MAXFLOAT to represent + * infinity. This may need some tweaking. + */ +#ifdef VMS + if (abs_t0 == __MAXFLOAT) +#else + if (IS_INF_OR_NAN(abs_t0)) +#endif + { + SET_POS_INFINITY(q[0]); + q[1] = 1.0F; + SET_POS_INFINITY(q[2]); + } + else { + int exponent; + GLfloat mantissa = FREXPF(t[0], &exponent); + q[0] = (GLfloat) (exponent - 1); + q[1] = (GLfloat) (2.0 * mantissa); /* map [.5, 1) -> [1, 2) */ + q[2] = (GLfloat) (q[0] + LOG2(q[1])); + } + } + else { + SET_NEG_INFINITY(q[0]); + q[1] = 1.0F; + SET_NEG_INFINITY(q[2]); + } + q[3] = 1.0; + store_vector4(inst, machine, q); + } + break; case OPCODE_LRP: { GLfloat a[4], b[4], c[4], result[4]; |