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radeonsi: use minnum and maxnum LLVM intrinsics for MIN and MAX opcodes

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So far it has been compiled into pretty ugly code (8 instructions or so
for either opcode).

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
This commit is contained in:
Marek Olšák 2014-11-20 22:16:09 +01:00
parent 21577571b3
commit 645b471d61
1 changed files with 7 additions and 0 deletions
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7
src/gallium/drivers/radeonsi/si_shader.c
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@ -2737,6 +2737,13 @@ int si_shader_create(struct si_screen *sscreen, struct si_shader *shader)
bld_base->op_actions[TGSI_OPCODE_EMIT].emit = si_llvm_emit_vertex;
bld_base->op_actions[TGSI_OPCODE_ENDPRIM].emit = si_llvm_emit_primitive;
if (HAVE_LLVM >= 0x0306) {
bld_base->op_actions[TGSI_OPCODE_MAX].emit = build_tgsi_intrinsic_nomem;
bld_base->op_actions[TGSI_OPCODE_MAX].intr_name = "llvm.maxnum.f32";
bld_base->op_actions[TGSI_OPCODE_MIN].emit = build_tgsi_intrinsic_nomem;
bld_base->op_actions[TGSI_OPCODE_MIN].intr_name = "llvm.minnum.f32";
}
si_shader_ctx.radeon_bld.load_system_value = declare_system_value;
si_shader_ctx.tokens = sel->tokens;
tgsi_parse_init(&si_shader_ctx.parse, si_shader_ctx.tokens);