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r600g: check gpr count limit

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This should help to prevent gpu lockups.
See https://bugs.freedesktop.org/show_bug.cgi?id=48472

NOTE: This is a candidate for the stable branches.

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Vadim Girlin 2012-04-10 00:44:52 +04:00 • committed by Alex Deucher
parent 4b06280ea3
commit 783e4da72a
1 changed files with 8 additions and 0 deletions
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8
src/gallium/drivers/r600/r600_shader.c
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@ -1266,6 +1266,14 @@ static int r600_shader_from_tgsi(struct r600_context * rctx, struct r600_pipe_sh
if (ctx.bc->chip_class == CAYMAN)
cm_bytecode_add_cf_end(ctx.bc);
/* check GPR limit - we have 124 = 128 - 4
* (4 are reserved as alu clause temporary registers) */
if (ctx.bc->ngpr > 124) {
R600_ERR("GPR limit exceeded - shader requires %d registers\n", ctx.bc->ngpr);
r = -ENOMEM;
goto out_err;
}
free(ctx.literals);
tgsi_parse_free(&ctx.parse);
return 0;