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nir: Add an ALU lowering pass for mul_high.

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This is based on the glsl/lower_instructions.cpp implementation, but
should be much more readable.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Eric Anholt
2018-05-08 11:24:40 -07:00
parent 6a0db5f08f
commit 6e1597c2d9
5 changed files with 171 additions and 0 deletions
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3
src/compiler/nir/nir.h
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@@ -1919,6 +1919,8 @@ typedef struct nir_shader_compiler_options {
bool lower_find_lsb;
bool lower_uadd_carry;
bool lower_usub_borrow;
/** Lowers imul_high/umul_high to 16-bit multiplies and carry operations. */
bool lower_mul_high;
/** lowers fneg and ineg to fsub and isub. */
bool lower_negate;
/** lowers fsub and isub to fadd+fneg and iadd+ineg. */
@@ -2628,6 +2630,7 @@ bool nir_move_vec_src_uses_to_dest(nir_shader *shader);
bool nir_lower_vec_to_movs(nir_shader *shader);
void nir_lower_alpha_test(nir_shader *shader, enum compare_func func,
bool alpha_to_one);
bool nir_lower_alu(nir_shader *shader);
bool nir_lower_alu_to_scalar(nir_shader *shader);
bool nir_lower_load_const_to_scalar(nir_shader *shader);
bool nir_lower_read_invocation_to_scalar(nir_shader *shader);