OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

glsl: Add "built-in" function for 64-bit integer sign()

Browse Source 
These functions are directly available in shaders.  A #define is added
to detect the presence.  This allows these functions to be tested using
piglit regardless of whether the driver uses them for lowering.  The
GLSL spec says that functions and macros beginning with __ are reserved
for use by the implementation... hey, that's us!

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Ian Romanick
2016-10-17 13:55:27 -07:00
parent 6c3af04363
commit 6b03b345eb
6 changed files with 251 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/compiler/glsl/builtin_int64.h
View File

@@ -28,3 +28,29 @@ umul64(void *mem_ctx, builtin_available_predicate avail)
sig->replace_parameters(&sig_parameters);
return sig;
}
ir_function_signature *
sign64(void *mem_ctx, builtin_available_predicate avail)
{
ir_function_signature *const sig =
new(mem_ctx) ir_function_signature(glsl_type::ivec2_type, avail);
ir_factory body(&sig->body, mem_ctx);
sig->is_defined = true;
exec_list sig_parameters;
ir_variable *const r0007 = new(mem_ctx) ir_variable(glsl_type::ivec2_type, "a", ir_var_function_in);
sig_parameters.push_tail(r0007);
ir_variable *const r0008 = new(mem_ctx) ir_variable(glsl_type::ivec2_type, "result", ir_var_auto);
body.emit(r0008);
body.emit(assign(r0008, rshift(swizzle_y(r0007), body.constant(int(31))), 0x02));
ir_expression *const r0009 = bit_or(swizzle_x(r0007), swizzle_y(r0007));
ir_expression *const r000A = nequal(r0009, body.constant(int(0)));
ir_expression *const r000B = expr(ir_unop_b2i, r000A);
body.emit(assign(r0008, bit_or(swizzle_y(r0008), r000B), 0x01));
body.emit(ret(r0008));
sig->replace_parameters(&sig_parameters);
return sig;
}