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intel/compiler: Add and use helpers for working with KSP indices

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The pixel shader dispatch table is kind-of a confusing mess.  This adds
some helpers for dealing with it and for easily extracting the correct
data from wm_prog_data.

Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Jason Ekstrand
2018-05-17 23:17:17 -07:00
parent 85750348bc
commit 9d78abbef8
5 changed files with 186 additions and 58 deletions
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85
src/intel/compiler/brw_compiler.h
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@@ -745,6 +745,91 @@ struct brw_wm_prog_data {
int urb_setup[VARYING_SLOT_MAX];
};
/** Returns the SIMD width corresponding to a given KSP index
*
* The "Variable Pixel Dispatch" table in the PRM (which can be found, for
* example in Vol. 7 of the SKL PRM) has a mapping from dispatch widths to
* kernel start pointer (KSP) indices that is based on what dispatch widths
* are enabled. This function provides, effectively, the reverse mapping.
*
* If the given KSP is valid with respect to the SIMD8/16/32 enables, a SIMD
* width of 8, 16, or 32 is returned. If the KSP is invalid, 0 is returned.
*/
static inline unsigned
brw_fs_simd_width_for_ksp(unsigned ksp_idx, bool simd8_enabled,
bool simd16_enabled, bool simd32_enabled)
{
/* This function strictly ignores contiguous dispatch */
switch (ksp_idx) {
case 0:
return simd8_enabled ? 8 :
(simd16_enabled && !simd32_enabled) ? 16 :
(simd32_enabled && !simd16_enabled) ? 32 : 0;
case 1:
return (simd32_enabled && (simd16_enabled || simd8_enabled)) ? 32 : 0;
case 2:
return (simd16_enabled && (simd32_enabled || simd8_enabled)) ? 16 : 0;
default:
unreachable("Invalid KSP index");
}
}
#define brw_wm_state_simd_width_for_ksp(wm_state, ksp_idx) \
brw_fs_simd_width_for_ksp((ksp_idx), (wm_state)._8PixelDispatchEnable, \
(wm_state)._16PixelDispatchEnable, \
(wm_state)._32PixelDispatchEnable)
#define brw_wm_state_has_ksp(wm_state, ksp_idx) \
(brw_wm_state_simd_width_for_ksp((wm_state), (ksp_idx)) != 0)
static inline uint32_t
_brw_wm_prog_data_prog_offset(const struct brw_wm_prog_data *prog_data,
unsigned ksp_idx)
{
switch (ksp_idx) {
case 0: return 0;
case 1: return 0;
case 2: return prog_data->prog_offset_2;
default:
unreachable("Invalid KSP index");
}
}
#define brw_wm_prog_data_prog_offset(prog_data, wm_state, ksp_idx) \
_brw_wm_prog_data_prog_offset(prog_data, ksp_idx)
static inline uint8_t
_brw_wm_prog_data_dispatch_grf_start_reg(const struct brw_wm_prog_data *prog_data,
unsigned ksp_idx)
{
switch (ksp_idx) {
case 0: return prog_data->base.dispatch_grf_start_reg;
case 1: return 0;
case 2: return prog_data->dispatch_grf_start_reg_2;
default:
unreachable("Invalid KSP index");
}
}
#define brw_wm_prog_data_dispatch_grf_start_reg(prog_data, wm_state, ksp_idx) \
_brw_wm_prog_data_dispatch_grf_start_reg(prog_data, ksp_idx)
static inline uint8_t
_brw_wm_prog_data_reg_blocks(const struct brw_wm_prog_data *prog_data,
unsigned ksp_idx)
{
switch (ksp_idx) {
case 0: return prog_data->reg_blocks_0;
case 1: return 0;
case 2: return prog_data->reg_blocks_2;
default:
unreachable("Invalid KSP index");
}
}
#define brw_wm_prog_data_reg_blocks(prog_data, wm_state, ksp_idx) \
_brw_wm_prog_data_reg_blocks(prog_data, ksp_idx)
struct brw_push_const_block {
unsigned dwords; /* Dword count, not reg aligned */
unsigned regs;