bl.h
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/*
* bl.h -- defines, structures used in blend unit
*
*/
#ifndef BL_UNIT_INCLD
#define BL_UNIT_INCLD
/* mux selects for multiplier 1,2 a inputs */
typedef enum {
BL0_BLPREV_CC_CLR,
BL0_MEM_CLR,
BL0_BLATTR_CLR,
BL0_FOG_COLOR
} BLMuxPMsel;
/* mux selects for multiplier 1 b inputs */
typedef enum {
BL1_PIXEL_ALPHA,
BL1_FOG_ALPHA,
BL1_SHADE_ALPHA,
BL1_ZERO
} BLMux1Sel;
/* mux selects for multiplier 2 b inputs */
typedef enum {
BL2_1_MINUS_A,
BL2_MEM_ALPHA,
BL2_ONE,
BL2_ZERO
} BLMux2Sel;
/*
* Structure containing all state of blender, inputs, and outputs
*/
typedef struct
{
/* R E Q U I R E D by C-sim */
char *label; /* label must be first */
int argc;
char **argv;
int gclk_old;
/* I N P U T signals (must be int) */
int gclk;
int st_span;
int ncyc;
int blend_mask; /* [7:0] */
int z_source_select;
int antialias_enable;
int z_compare_enable;
int z_update_enable;
int z_mode; /* [1:0] */
int cvg_dest; /* [1:0] */
int color_on_cvg;
int force_blend;
int mask15b;
int bl_p_sel_0_r; /* [1:0] */
int bl_m_sel_0_r; /* [1:0] */
int bl_a_sel_0_r; /* [1:0] */
int bl_b_sel_0_r; /* [1:0] */
int bl_p_sel_1_r; /* [1:0] */
int bl_m_sel_1_r; /* [1:0] */
int bl_a_sel_1_r; /* [1:0] */
int bl_b_sel_1_r; /* [1:0] */
int blend_r; /* [7:0] */
int blend_g; /* [7:0] */
int blend_b; /* [7:0] */
int fog_r; /* [7:0] */
int fog_g; /* [7:0] */
int fog_b; /* [7:0] */
int fog_a; /* [7:0] */
int pixel_r; /* [7:0] */
int pixel_g; /* [7:0] */
int pixel_b; /* [7:0] */
int pixel_a; /* [8:0] */
int pixel_cvg; /* [3:0], 1.3 */
int shade_a; /* [7:0] */
int st_z; /* [17:0], 15.3 */
int dzdx; /* [15:0], s0.15 */
int dzdy; /* [15:0], s0.15 */
int prim_z; /* [15:0] */
int prim_delta_z; /* [15:0] */
int mem_r; /* [7:0] */
int mem_g; /* [7:0] */
int mem_b; /* [7:0] */
int mem_a; /* [2:0] */
int mem_z; /* [17:0], float format:
[17:15] exponent, [14:4] mantissa,
[3:0] delta_z
*/
/* O U T P U T signals (must be int) */
int span_r; /* [7:0] */
int span_g; /* [7:0] */
int span_b; /* [7:0] */
int span_a; /* [2:0] */
int span_z; /* [17:0] */
int span_color_we;
int span_depth_we;
/* I N T E R N A L registers */
/*
* Blend Unit Page 1 Registers
*
*
*
*/
unsigned int cycle: 1; /* clock -1 */
unsigned int cycle_d1: 1; /* clock 0 */
unsigned int mode_p_r: 2; /* clock 0 */
unsigned int mode_m_r: 2; /* clock 0 */
unsigned int mode_a_r: 2; /* clock 0 */
unsigned int mode_b_r: 2; /* clock 0 */
unsigned int blended_r: 11; /* clock 1, 0.11 */
unsigned int blended_g: 11; /* clock 1, 0.11 */
unsigned int blended_b: 11; /* clock 1, 0.11 */
unsigned int denom: 4; /* clock 1, 1.3 */
unsigned int p_r: 8; /* clock 1, 0.8 */
unsigned int p_g: 8; /* clock 1, 0.8 */
unsigned int p_b: 8; /* clock 1, 0.8 */
unsigned int m_r: 8; /* clock 1, 0.8 */
unsigned int m_g: 8; /* clock 1, 0.8 */
unsigned int m_b: 8; /* clock 1, 0.8 */
unsigned int dividend_r: 8; /* clock 2, 0.8 */
unsigned int dividend_g: 8; /* clock 2, 0.8 */
unsigned int dividend_b: 8; /* clock 2, 0.8 */
unsigned int blended_r_d1: 8; /* clock 2, 0.8 */
unsigned int blended_g_d1: 8; /* clock 2, 0.8 */
unsigned int blended_b_d1: 8; /* clock 2, 0.8 */
unsigned int p_r_d1: 8; /* clock 2, 0.8 */
unsigned int p_g_d1: 8; /* clock 2, 0.8 */
unsigned int p_b_d1: 8; /* clock 2, 0.8 */
unsigned int m_r_d1: 8; /* clock 2, 0.8 */
unsigned int m_g_d1: 8; /* clock 2, 0.8 */
unsigned int m_b_d1: 8; /* clock 2, 0.8 */
unsigned int force_blend_d1: 1; /* clock 3 */
int pixel_a_d1; /* for 2nd cycle of 2 cycle mode */
int pixel_cvg_d2: 4; /* for 2nd cycle of 2 cycle mode */
/*
* Blend Unit Page 2 Registers
*
*
*
*/
unsigned int pixel_cvg_d1: 4; /* clock 1, 1.3 */
unsigned int mem_a_d1: 3; /* clock 1, 0.3 */
unsigned int zcvg: 4; /* clock 2, 1.3 */
unsigned int cvg_wrap: 1; /* clock 2 */
unsigned int mem_a_d2: 3; /* clock 2 */
/*
* Blend Unit Page 3 Registers
*
*
*
*/
unsigned int norm_a: 4; /* clock 0 */
unsigned int norm_b: 4; /* clock 0 */
unsigned int new_dz_d1: 16; /* clock 0 */
unsigned int new_z: 18; /* clock 0 */
unsigned int mem_z_d1: 18; /* clock 0 */
unsigned int mem_dz_d1: 16; /* clock 0 */
unsigned int z_source_d1; /* clock 1 */
unsigned int new_dz_d2: 16; /* clock 1 */
unsigned int delta_z: 4; /* clock 1 */
unsigned int old_z: 18; /* clock 1 */
unsigned int max_z: 1; /* clock 1 */
unsigned int farther: 1; /* clock 1 */
unsigned int nearer: 1; /* clock 1 */
unsigned int in_front: 1; /* clock 1 */
unsigned int blend_en: 1; /* clock 2 */
unsigned int span_color_we_m1: 1; /* clock 2 */
} bl_t;
/*
* Prototypes
*/
void bl(bl_t **pp0, bl_t **pp1);
void bl_init(bl_t *p0, bl_t *p1);
#endif /* BL_UNIT_INCLD */