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r300: transform fs sin and cos input to [0,1) range in NIR

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shader-db stats with RV530 (together with the vs commit):
total instructions in shared programs: 65194 -> 64721 (-0.73%)
instructions in affected programs: 6718 -> 6245 (-7.04%)
total consts in shared programs: 45363 -> 45353 (-0.02%)
consts in affected programs: 466 -> 456 (-2.15%)

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5982
Reviewed-by: Emma Anholt <emma@anholt.net>
Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14957>
This commit is contained in:
Pavel Ondračka 2022-02-09 16:11:29 +01:00 • committed by Marge Bot
parent 3f97306b95
commit a04aa4bc08
5 changed files with 21 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
src/gallium/drivers/r300/compiler/r300_nir_algebraic.py
View file

@ -34,6 +34,15 @@ transform_trig_input_vs_r500 = [
(('fcos', 'a'), ('fcos', ('fadd', ('fmul', ('ffract', ('fadd', ('fmul', 'a', 1 / (2 * pi)) , 0.5)), 2 * pi), -pi))),
]
# Transform input to range [-PI, PI]:
#
# y = frac(x / 2PI)
#
transform_trig_input_fs_r500 = [
(('fsin', 'a'), ('fsin', ('ffract', ('fmul', 'a', 1 / (2 * pi))))),
(('fcos', 'a'), ('fcos', ('ffract', ('fmul', 'a', 1 / (2 * pi))))),
]
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-p', '--import-path', required=True)
@ -49,6 +58,9 @@ def main():
f.write(nir_algebraic.AlgebraicPass("r300_transform_vs_trig_input",
transform_trig_input_vs_r500).render())
f.write(nir_algebraic.AlgebraicPass("r300_transform_fs_trig_input",
transform_trig_input_fs_r500).render())
if __name__ == '__main__':
main()

3
src/gallium/drivers/r300/compiler/radeon_program_alu.c
View file

@ -1026,6 +1026,9 @@ int radeonTransformTrigScale(struct radeon_compiler* c,
inst->U.I.Opcode != RC_OPCODE_SIN)
return 0;
if (!c->needs_trig_input_transform)
return 1;
temp = rc_find_free_temporary(c);
constant = rc_constants_add_immediate_scalar(&c->Program.Constants, RCP_2PI, &constant_swizzle);

1
src/gallium/drivers/r300/r300_fs.c
View file

@ -440,6 +440,7 @@ static void r300_translate_fragment_shader(
compiler.Base.has_half_swizzles = TRUE;
compiler.Base.has_presub = TRUE;
compiler.Base.has_omod = TRUE;
compiler.Base.needs_trig_input_transform = DBG_ON(r300, DBG_USE_TGSI);
compiler.Base.max_temp_regs =
compiler.Base.is_r500 ? 128 : (compiler.Base.is_r400 ? 64 : 32);
compiler.Base.max_constants = compiler.Base.is_r500 ? 256 : 32;

2
src/gallium/drivers/r300/r300_state.c
View file

@ -1045,6 +1045,8 @@ static void* r300_create_fs_state(struct pipe_context* pipe,
fs->state = *shader;
if (fs->state.type == PIPE_SHADER_IR_NIR) {
if (r300->screen->caps.is_r500)
NIR_PASS_V(shader->ir.nir, r300_transform_fs_trig_input);
fs->state.tokens = nir_to_tgsi(shader->ir.nir, pipe->screen);
} else {
assert(fs->state.type == PIPE_SHADER_IR_TGSI);

4
src/gallium/drivers/r300/r300_vs.h
View file

@ -67,6 +67,8 @@ void r300_translate_vertex_shader(struct r300_context *r300,
void r300_draw_init_vertex_shader(struct r300_context *r300,
struct r300_vertex_shader *vs);
extern bool r300_transform_trig_input(struct nir_shader *shader);
extern bool r300_transform_vs_trig_input(struct nir_shader *shader);
extern bool r300_transform_fs_trig_input(struct nir_shader *shader);
#endif /* R300_VS_H */