llvmpipe: Move lp_build_select to lp_bld_logic.[ch].
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1aae039ee2
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09a7b011ac
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@ -39,6 +39,7 @@
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#include "lp_bld_type.h"
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#include "lp_bld_const.h"
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#include "lp_bld_arit.h"
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#include "lp_bld_logic.h"
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#include "lp_bld_swizzle.h"
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#include "lp_bld_blend.h"
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@ -28,6 +28,7 @@
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#include "pipe/p_defines.h"
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#include "lp_bld_type.h"
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#include "lp_bld_const.h"
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#include "lp_bld_intr.h"
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#include "lp_bld_logic.h"
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@ -172,3 +173,105 @@ lp_build_cmp(struct lp_build_context *bld,
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return LLVMBuildSelect(bld->builder, cond, ones, zeros, "");
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}
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LLVMValueRef
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lp_build_select(struct lp_build_context *bld,
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LLVMValueRef mask,
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LLVMValueRef a,
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LLVMValueRef b)
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{
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union lp_type type = bld->type;
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LLVMValueRef res;
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if(a == b)
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return a;
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if(type.floating) {
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LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
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a = LLVMBuildBitCast(bld->builder, a, int_vec_type, "");
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b = LLVMBuildBitCast(bld->builder, b, int_vec_type, "");
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}
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/* TODO: On SSE4 we could do this with a single instruction -- PBLENDVB */
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a = LLVMBuildAnd(bld->builder, a, mask, "");
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/* This often gets translated to PANDN, but sometimes the NOT is
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* pre-computed and stored in another constant. The best strategy depends
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* on available registers, so it is not a big deal -- hopefully LLVM does
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* the right decision attending the rest of the program.
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*/
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b = LLVMBuildAnd(bld->builder, b, LLVMBuildNot(bld->builder, mask, ""), "");
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res = LLVMBuildOr(bld->builder, a, b, "");
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if(type.floating) {
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LLVMTypeRef vec_type = lp_build_vec_type(type);
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res = LLVMBuildBitCast(bld->builder, res, vec_type, "");
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}
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return res;
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}
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LLVMValueRef
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lp_build_select_aos(struct lp_build_context *bld,
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LLVMValueRef a,
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LLVMValueRef b,
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boolean cond[4])
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{
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const union lp_type type = bld->type;
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const unsigned n = type.length;
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unsigned i, j;
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if(a == b)
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return a;
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if(cond[0] && cond[1] && cond[2] && cond[3])
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return a;
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if(!cond[0] && !cond[1] && !cond[2] && !cond[3])
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return b;
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if(a == bld->undef || b == bld->undef)
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return bld->undef;
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/*
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* There are three major ways of accomplishing this:
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* - with a shuffle,
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* - with a select,
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* - or with a bit mask.
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*
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* Select isn't supported for vector types yet.
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* The flip between these is empirical and might need to be.
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*/
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if (n <= 4) {
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/*
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* Shuffle.
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*/
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LLVMTypeRef elem_type = LLVMInt32Type();
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LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
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for(j = 0; j < n; j += 4)
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for(i = 0; i < 4; ++i)
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shuffles[j + i] = LLVMConstInt(elem_type, (cond[i] ? 0 : n) + j + i, 0);
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return LLVMBuildShuffleVector(bld->builder, a, b, LLVMConstVector(shuffles, n), "");
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}
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#if 0
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else if(0) {
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/* FIXME: Unfortunately select of vectors do not work */
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/* Use a select */
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LLVMTypeRef elem_type = LLVMInt1Type();
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LLVMValueRef cond[LP_MAX_VECTOR_LENGTH];
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for(j = 0; j < n; j += 4)
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for(i = 0; i < 4; ++i)
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cond[j + i] = LLVMConstInt(elem_type, cond[i] ? 1 : 0, 0);
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return LLVMBuildSelect(bld->builder, LLVMConstVector(cond, n), a, b, "");
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}
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#endif
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else {
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LLVMValueRef mask = lp_build_const_mask_aos(type, cond);
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return lp_build_select(bld, mask, a, b);
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}
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}
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@ -54,4 +54,17 @@ lp_build_cmp(struct lp_build_context *bld,
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LLVMValueRef b);
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LLVMValueRef
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lp_build_select(struct lp_build_context *bld,
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LLVMValueRef mask,
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LLVMValueRef a,
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LLVMValueRef b);
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LLVMValueRef
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lp_build_select_aos(struct lp_build_context *bld,
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LLVMValueRef a,
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LLVMValueRef b,
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boolean cond[4]);
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#endif /* !LP_BLD_LOGIC_H */
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@ -30,6 +30,7 @@
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#include "lp_bld_type.h"
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#include "lp_bld_const.h"
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#include "lp_bld_logic.h"
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#include "lp_bld_swizzle.h"
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@ -131,108 +132,6 @@ lp_build_broadcast_aos(struct lp_build_context *bld,
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}
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LLVMValueRef
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lp_build_select(struct lp_build_context *bld,
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LLVMValueRef mask,
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LLVMValueRef a,
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LLVMValueRef b)
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{
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union lp_type type = bld->type;
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LLVMValueRef res;
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if(a == b)
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return a;
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if(type.floating) {
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LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
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a = LLVMBuildBitCast(bld->builder, a, int_vec_type, "");
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b = LLVMBuildBitCast(bld->builder, b, int_vec_type, "");
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}
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/* TODO: On SSE4 we could do this with a single instruction -- PBLENDVB */
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a = LLVMBuildAnd(bld->builder, a, mask, "");
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/* This often gets translated to PANDN, but sometimes the NOT is
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* pre-computed and stored in another constant. The best strategy depends
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* on available registers, so it is not a big deal -- hopefully LLVM does
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* the right decision attending the rest of the program.
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*/
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b = LLVMBuildAnd(bld->builder, b, LLVMBuildNot(bld->builder, mask, ""), "");
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res = LLVMBuildOr(bld->builder, a, b, "");
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if(type.floating) {
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LLVMTypeRef vec_type = lp_build_vec_type(type);
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res = LLVMBuildBitCast(bld->builder, res, vec_type, "");
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}
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return res;
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}
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LLVMValueRef
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lp_build_select_aos(struct lp_build_context *bld,
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LLVMValueRef a,
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LLVMValueRef b,
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boolean cond[4])
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{
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const union lp_type type = bld->type;
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const unsigned n = type.length;
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unsigned i, j;
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if(a == b)
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return a;
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if(cond[0] && cond[1] && cond[2] && cond[3])
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return a;
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if(!cond[0] && !cond[1] && !cond[2] && !cond[3])
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return b;
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if(a == bld->undef || b == bld->undef)
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return bld->undef;
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/*
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* There are three major ways of accomplishing this:
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* - with a shuffle,
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* - with a select,
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* - or with a bit mask.
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*
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* Select isn't supported for vector types yet.
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* The flip between these is empirical and might need to be.
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*/
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if (n <= 4) {
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/*
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* Shuffle.
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*/
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LLVMTypeRef elem_type = LLVMInt32Type();
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LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
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for(j = 0; j < n; j += 4)
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for(i = 0; i < 4; ++i)
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shuffles[j + i] = LLVMConstInt(elem_type, (cond[i] ? 0 : n) + j + i, 0);
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return LLVMBuildShuffleVector(bld->builder, a, b, LLVMConstVector(shuffles, n), "");
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}
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#if 0
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else if(0) {
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/* FIXME: Unfortunately select of vectors do not work */
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/* Use a select */
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LLVMTypeRef elem_type = LLVMInt1Type();
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LLVMValueRef cond[LP_MAX_VECTOR_LENGTH];
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for(j = 0; j < n; j += 4)
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for(i = 0; i < 4; ++i)
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cond[j + i] = LLVMConstInt(elem_type, cond[i] ? 1 : 0, 0);
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return LLVMBuildSelect(bld->builder, LLVMConstVector(cond, n), a, b, "");
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}
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#endif
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else {
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LLVMValueRef mask = lp_build_const_mask_aos(type, cond);
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return lp_build_select(bld, mask, a, b);
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}
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}
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LLVMValueRef
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lp_build_swizzle1_aos(struct lp_build_context *bld,
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LLVMValueRef a,
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@ -59,19 +59,6 @@ lp_build_broadcast_aos(struct lp_build_context *bld,
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unsigned channel);
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LLVMValueRef
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lp_build_select(struct lp_build_context *bld,
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LLVMValueRef mask,
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LLVMValueRef a,
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LLVMValueRef b);
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LLVMValueRef
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lp_build_select_aos(struct lp_build_context *bld,
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LLVMValueRef a,
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LLVMValueRef b,
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boolean cond[4]);
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/**
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* Swizzle a vector consisting of an array of XYZW structs.
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*
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