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agx: Add agx_read_registers helper

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To be used for inserting waits post-RA.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20446>
This commit is contained in:
Alyssa Rosenzweig 2022-12-20 11:12:01 -05:00
parent e6631ba5af
commit 6685dba75e
2 changed files with 87 additions and 0 deletions
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1
src/asahi/compiler/agx_compiler.h
View file

@ -806,6 +806,7 @@ agx_validate(UNUSED agx_context *ctx, UNUSED const char *after_str)
}
#endif
unsigned agx_read_registers(agx_instr *I, unsigned s);
unsigned agx_write_registers(agx_instr *I, unsigned d);
struct agx_copy {

86
src/asahi/compiler/agx_register_allocate.c
View file

@ -88,6 +88,92 @@ agx_split_width(const agx_instr *I)
return width;
}
unsigned
agx_read_registers(agx_instr *I, unsigned s)
{
unsigned size = agx_size_align_16(I->src[s].size);
switch (I->op) {
case AGX_OPCODE_SPLIT:
return I->nr_dests * agx_size_align_16(agx_split_width(I));
case AGX_OPCODE_DEVICE_STORE:
case AGX_OPCODE_ST_TILE:
if (s == 0)
return util_bitcount(I->mask) * size;
else
return size;
case AGX_OPCODE_ZS_EMIT:
if (s == 1) {
/* Depth (bit 0) is fp32, stencil (bit 1) is u16 in the hw but we pad
* up to u32 for simplicity
*/
return 2 * (!!(I->zs & 1) + !!(I->zs & 2));
} else {
return 1;
}
case AGX_OPCODE_TEXTURE_LOAD:
case AGX_OPCODE_TEXTURE_SAMPLE:
if (s == 0) {
/* Coordinates. We internally handle sample index as 32-bit */
switch (I->dim) {
case AGX_DIM_1D:
return 2 * 1;
case AGX_DIM_1D_ARRAY:
return 2 * 2;
case AGX_DIM_2D:
return 2 * 2;
case AGX_DIM_2D_ARRAY:
return 2 * 3;
case AGX_DIM_2D_MS:
return 2 * 3;
case AGX_DIM_3D:
return 2 * 3;
case AGX_DIM_CUBE:
return 2 * 3;
case AGX_DIM_CUBE_ARRAY:
return 2 * 4;
case AGX_DIM_2D_MS_ARRAY:
return 2 * 4;
}
unreachable("Invalid texture dimension");
} else if (s == 1) {
/* LOD */
if (I->lod_mode == AGX_LOD_MODE_LOD_GRAD) {
switch (I->dim) {
case AGX_DIM_1D:
case AGX_DIM_1D_ARRAY:
return 2 * 2 * 1;
case AGX_DIM_2D:
case AGX_DIM_2D_ARRAY:
case AGX_DIM_2D_MS_ARRAY:
case AGX_DIM_2D_MS:
return 2 * 2 * 2;
case AGX_DIM_CUBE:
case AGX_DIM_CUBE_ARRAY:
case AGX_DIM_3D:
return 2 * 2 * 3;
}
unreachable("Invalid texture dimension");
} else {
return 1;
}
} else if (s == 4) {
/* Compare/offset */
return 2 * ((!!I->shadow) + (!!I->offset));
} else {
return size;
}
default:
return size;
}
}
static unsigned
find_regs(BITSET_WORD *used_regs, unsigned count, unsigned align, unsigned max)
{