diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_const.c')
-rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_const.c | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_const.c b/src/gallium/drivers/llvmpipe/lp_bld_const.c deleted file mode 100644 index c8eaa8c394..0000000000 --- a/src/gallium/drivers/llvmpipe/lp_bld_const.c +++ /dev/null @@ -1,369 +0,0 @@ -/************************************************************************** - * - * Copyright 2009 VMware, Inc. - * All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sub license, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial portions - * of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. - * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR - * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, - * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE - * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - **************************************************************************/ - - -/** - * @file - * Helper functions for constant building. - * - * @author Jose Fonseca <jfonseca@vmware.com> - */ - -#include <float.h> - -#include "util/u_debug.h" - -#include "lp_bld_type.h" -#include "lp_bld_const.h" - - -unsigned -lp_mantissa(struct lp_type type) -{ - assert(type.floating); - - if(type.floating) { - switch(type.width) { - case 32: - return 23; - case 64: - return 53; - default: - assert(0); - return 0; - } - } - else { - if(type.sign) - return type.width - 1; - else - return type.width; - } -} - - -/** - * Shift of the unity. - * - * Same as lp_const_scale(), but in terms of shifts. - */ -unsigned -lp_const_shift(struct lp_type type) -{ - if(type.floating) - return 0; - else if(type.fixed) - return type.width/2; - else if(type.norm) - return type.sign ? type.width - 1 : type.width; - else - return 0; -} - - -unsigned -lp_const_offset(struct lp_type type) -{ - if(type.floating || type.fixed) - return 0; - else if(type.norm) - return 1; - else - return 0; -} - - -/** - * Scaling factor between the LLVM native value and its interpretation. - * - * This is 1.0 for all floating types and unnormalized integers, and something - * else for the fixed points types and normalized integers. - */ -double -lp_const_scale(struct lp_type type) -{ - unsigned long long llscale; - double dscale; - - llscale = (unsigned long long)1 << lp_const_shift(type); - llscale -= lp_const_offset(type); - dscale = (double)llscale; - assert((unsigned long long)dscale == llscale); - - return dscale; -} - - -/** - * Minimum value representable by the type. - */ -double -lp_const_min(struct lp_type type) -{ - unsigned bits; - - if(!type.sign) - return 0.0; - - if(type.norm) - return -1.0; - - if (type.floating) { - switch(type.width) { - case 32: - return -FLT_MAX; - case 64: - return -DBL_MAX; - default: - assert(0); - return 0.0; - } - } - - if(type.fixed) - /* FIXME: consider the fractional bits? */ - bits = type.width / 2 - 1; - else - bits = type.width - 1; - - return (double)-((long long)1 << bits); -} - - -/** - * Maximum value representable by the type. - */ -double -lp_const_max(struct lp_type type) -{ - unsigned bits; - - if(type.norm) - return 1.0; - - if (type.floating) { - switch(type.width) { - case 32: - return FLT_MAX; - case 64: - return DBL_MAX; - default: - assert(0); - return 0.0; - } - } - - if(type.fixed) - bits = type.width / 2; - else - bits = type.width; - - if(type.sign) - bits -= 1; - - return (double)(((unsigned long long)1 << bits) - 1); -} - - -double -lp_const_eps(struct lp_type type) -{ - if (type.floating) { - switch(type.width) { - case 32: - return FLT_EPSILON; - case 64: - return DBL_EPSILON; - default: - assert(0); - return 0.0; - } - } - else { - double scale = lp_const_scale(type); - return 1.0/scale; - } -} - - -LLVMValueRef -lp_build_undef(struct lp_type type) -{ - LLVMTypeRef vec_type = lp_build_vec_type(type); - return LLVMGetUndef(vec_type); -} - - -LLVMValueRef -lp_build_zero(struct lp_type type) -{ - LLVMTypeRef vec_type = lp_build_vec_type(type); - return LLVMConstNull(vec_type); -} - - -LLVMValueRef -lp_build_one(struct lp_type type) -{ - LLVMTypeRef elem_type; - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i; - - assert(type.length <= LP_MAX_VECTOR_LENGTH); - - elem_type = lp_build_elem_type(type); - - if(type.floating) - elems[0] = LLVMConstReal(elem_type, 1.0); - else if(type.fixed) - elems[0] = LLVMConstInt(elem_type, 1LL << (type.width/2), 0); - else if(!type.norm) - elems[0] = LLVMConstInt(elem_type, 1, 0); - else if(type.sign) - elems[0] = LLVMConstInt(elem_type, (1LL << (type.width - 1)) - 1, 0); - else { - /* special case' -- 1.0 for normalized types is more easily attained if - * we start with a vector consisting of all bits set */ - LLVMTypeRef vec_type = LLVMVectorType(elem_type, type.length); - LLVMValueRef vec = LLVMConstAllOnes(vec_type); - -#if 0 - if(type.sign) - /* TODO: Unfortunately this caused "Tried to create a shift operation - * on a non-integer type!" */ - vec = LLVMConstLShr(vec, lp_build_int_const_scalar(type, 1)); -#endif - - return vec; - } - - for(i = 1; i < type.length; ++i) - elems[i] = elems[0]; - - return LLVMConstVector(elems, type.length); -} - - -LLVMValueRef -lp_build_const_scalar(struct lp_type type, - double val) -{ - LLVMTypeRef elem_type = lp_build_elem_type(type); - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i; - - assert(type.length <= LP_MAX_VECTOR_LENGTH); - - if(type.floating) { - elems[0] = LLVMConstReal(elem_type, val); - } - else { - double dscale = lp_const_scale(type); - - elems[0] = LLVMConstInt(elem_type, val*dscale + 0.5, 0); - } - - for(i = 1; i < type.length; ++i) - elems[i] = elems[0]; - - return LLVMConstVector(elems, type.length); -} - - -LLVMValueRef -lp_build_int_const_scalar(struct lp_type type, - long long val) -{ - LLVMTypeRef elem_type = lp_build_int_elem_type(type); - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i; - - assert(type.length <= LP_MAX_VECTOR_LENGTH); - - for(i = 0; i < type.length; ++i) - elems[i] = LLVMConstInt(elem_type, val, type.sign ? 1 : 0); - - return LLVMConstVector(elems, type.length); -} - - -LLVMValueRef -lp_build_const_aos(struct lp_type type, - double r, double g, double b, double a, - const unsigned char *swizzle) -{ - const unsigned char default_swizzle[4] = {0, 1, 2, 3}; - LLVMTypeRef elem_type; - LLVMValueRef elems[LP_MAX_VECTOR_LENGTH]; - unsigned i; - - assert(type.length % 4 == 0); - assert(type.length <= LP_MAX_VECTOR_LENGTH); - - elem_type = lp_build_elem_type(type); - - if(swizzle == NULL) - swizzle = default_swizzle; - - if(type.floating) { - elems[swizzle[0]] = LLVMConstReal(elem_type, r); - elems[swizzle[1]] = LLVMConstReal(elem_type, g); - elems[swizzle[2]] = LLVMConstReal(elem_type, b); - elems[swizzle[3]] = LLVMConstReal(elem_type, a); - } - else { - double dscale = lp_const_scale(type); - - elems[swizzle[0]] = LLVMConstInt(elem_type, r*dscale + 0.5, 0); - elems[swizzle[1]] = LLVMConstInt(elem_type, g*dscale + 0.5, 0); - elems[swizzle[2]] = LLVMConstInt(elem_type, b*dscale + 0.5, 0); - elems[swizzle[3]] = LLVMConstInt(elem_type, a*dscale + 0.5, 0); - } - - for(i = 4; i < type.length; ++i) - elems[i] = elems[i % 4]; - - return LLVMConstVector(elems, type.length); -} - - -LLVMValueRef -lp_build_const_mask_aos(struct lp_type type, - const boolean cond[4]) -{ - LLVMTypeRef elem_type = LLVMIntType(type.width); - LLVMValueRef masks[LP_MAX_VECTOR_LENGTH]; - unsigned i, j; - - assert(type.length <= LP_MAX_VECTOR_LENGTH); - - for(j = 0; j < type.length; j += 4) - for(i = 0; i < 4; ++i) - masks[j + i] = LLVMConstInt(elem_type, cond[i] ? ~0 : 0, 0); - - return LLVMConstVector(masks, type.length); -} |