From 01b85e292352d710586344348fff5a81459e5486 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jos=C3=A9=20Fonseca?= Date: Thu, 22 Oct 2009 18:28:57 +0100 Subject: [PATCH] llvmpipe: Use the pack/unpack functions for 8bit unsigned norm multiplication. --- src/gallium/drivers/llvmpipe/lp_bld_arit.c | 96 ++++++------------------------ 1 file changed, 17 insertions(+), 79 deletions(-) diff --git a/src/gallium/drivers/llvmpipe/lp_bld_arit.c b/src/gallium/drivers/llvmpipe/lp_bld_arit.c index d27ef0d..83ca06a 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_arit.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_arit.c @@ -54,6 +54,7 @@ #include "lp_bld_const.h" #include "lp_bld_intr.h" #include "lp_bld_logic.h" +#include "lp_bld_pack.h" #include "lp_bld_debug.h" #include "lp_bld_arit.h" @@ -280,45 +281,6 @@ lp_build_sub(struct lp_build_context *bld, /** - * Build shuffle vectors that match PUNPCKLxx and PUNPCKHxx instructions. - */ -static LLVMValueRef -lp_build_unpack_shuffle(unsigned n, unsigned lo_hi) -{ - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i, j; - - assert(n <= LP_MAX_VECTOR_LENGTH); - assert(lo_hi < 2); - - for(i = 0, j = lo_hi*n/2; i < n; i += 2, ++j) { - elems[i + 0] = LLVMConstInt(LLVMInt32Type(), 0 + j, 0); - elems[i + 1] = LLVMConstInt(LLVMInt32Type(), n + j, 0); - } - - return LLVMConstVector(elems, n); -} - - -/** - * Build constant int vector of width 'n' and value 'c'. - */ -static LLVMValueRef -lp_build_const_vec(LLVMTypeRef type, unsigned n, long long c) -{ - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i; - - assert(n <= LP_MAX_VECTOR_LENGTH); - - for(i = 0; i < n; ++i) - elems[i] = LLVMConstInt(type, c, 0); - - return LLVMConstVector(elems, n); -} - - -/** * Normalized 8bit multiplication. * * - alpha plus one @@ -361,33 +323,30 @@ lp_build_const_vec(LLVMTypeRef type, unsigned n, long long c) */ static LLVMValueRef lp_build_mul_u8n(LLVMBuilderRef builder, + struct lp_type i16_type, LLVMValueRef a, LLVMValueRef b) { - static LLVMValueRef c01 = NULL; - static LLVMValueRef c08 = NULL; - static LLVMValueRef c80 = NULL; + LLVMValueRef c8; LLVMValueRef ab; - if(!c01) c01 = lp_build_const_vec(LLVMInt16Type(), 8, 0x01); - if(!c08) c08 = lp_build_const_vec(LLVMInt16Type(), 8, 0x08); - if(!c80) c80 = lp_build_const_vec(LLVMInt16Type(), 8, 0x80); + c8 = lp_build_int_const_scalar(i16_type, 8); #if 0 /* a*b/255 ~= (a*(b + 1)) >> 256 */ - b = LLVMBuildAdd(builder, b, c01, ""); + b = LLVMBuildAdd(builder, b, lp_build_int_const_scalar(i16_type, 1), ""); ab = LLVMBuildMul(builder, a, b, ""); #else - /* t/255 ~= (t + (t >> 8) + 0x80) >> 8 */ + /* ab/255 ~= (ab + (ab >> 8) + 0x80) >> 8 */ ab = LLVMBuildMul(builder, a, b, ""); - ab = LLVMBuildAdd(builder, ab, LLVMBuildLShr(builder, ab, c08, ""), ""); - ab = LLVMBuildAdd(builder, ab, c80, ""); + ab = LLVMBuildAdd(builder, ab, LLVMBuildLShr(builder, ab, c8, ""), ""); + ab = LLVMBuildAdd(builder, ab, lp_build_int_const_scalar(i16_type, 0x80), ""); #endif - ab = LLVMBuildLShr(builder, ab, c08, ""); + ab = LLVMBuildLShr(builder, ab, c8, ""); return ab; } @@ -415,39 +374,18 @@ lp_build_mul(struct lp_build_context *bld, return bld->undef; if(!type.floating && !type.fixed && type.norm) { - if(util_cpu_caps.has_sse2 && type.width == 8 && type.length == 16) { - LLVMTypeRef i16x8 = LLVMVectorType(LLVMInt16Type(), 8); - LLVMTypeRef i8x16 = LLVMVectorType(LLVMInt8Type(), 16); - static LLVMValueRef ml = NULL; - static LLVMValueRef mh = NULL; - LLVMValueRef al, ah, bl, bh; - LLVMValueRef abl, abh; - LLVMValueRef ab; - - if(!ml) ml = lp_build_unpack_shuffle(16, 0); - if(!mh) mh = lp_build_unpack_shuffle(16, 1); + if(type.width == 8) { + struct lp_type i16_type = lp_wider_type(type); + LLVMValueRef al, ah, bl, bh, abl, abh, ab; - /* PUNPCKLBW, PUNPCKHBW */ - al = LLVMBuildShuffleVector(bld->builder, a, bld->zero, ml, ""); - bl = LLVMBuildShuffleVector(bld->builder, b, bld->zero, ml, ""); - ah = LLVMBuildShuffleVector(bld->builder, a, bld->zero, mh, ""); - bh = LLVMBuildShuffleVector(bld->builder, b, bld->zero, mh, ""); - - /* NOP */ - al = LLVMBuildBitCast(bld->builder, al, i16x8, ""); - bl = LLVMBuildBitCast(bld->builder, bl, i16x8, ""); - ah = LLVMBuildBitCast(bld->builder, ah, i16x8, ""); - bh = LLVMBuildBitCast(bld->builder, bh, i16x8, ""); + lp_build_unpack2(bld->builder, type, i16_type, a, &al, &ah); + lp_build_unpack2(bld->builder, type, i16_type, b, &bl, &bh); /* PMULLW, PSRLW, PADDW */ - abl = lp_build_mul_u8n(bld->builder, al, bl); - abh = lp_build_mul_u8n(bld->builder, ah, bh); - - /* PACKUSWB */ - ab = lp_build_intrinsic_binary(bld->builder, "llvm.x86.sse2.packuswb.128" , i16x8, abl, abh); + abl = lp_build_mul_u8n(bld->builder, i16_type, al, bl); + abh = lp_build_mul_u8n(bld->builder, i16_type, ah, bh); - /* NOP */ - ab = LLVMBuildBitCast(bld->builder, ab, i8x16, ""); + ab = lp_build_pack2(bld->builder, i16_type, type, abl, abh); return ab; } -- 2.7.4