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gallivm: refactor code into get_indirect_offsets() function

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This commit is contained in:
Brian Paul 2010-07-21 09:42:11 -06:00
parent 890976e02d
commit 0115f07507
1 changed files with 34 additions and 23 deletions
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57
src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
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@ -459,6 +459,38 @@ build_gather(struct lp_build_tgsi_soa_context *bld,
}
/**
* Read the current value of the ADDR register, convert the floats to
* ints, multiply by four and return the vector of offsets.
* The offsets will be used to index into the constant buffer or
* temporary register file.
*/
static LLVMValueRef
get_indirect_offsets(struct lp_build_tgsi_soa_context *bld,
const struct tgsi_src_register *indirect_reg)
{
/* always use X component of address register */
const int x = indirect_reg->SwizzleX;
LLVMTypeRef int_vec_type = lp_build_int_vec_type(bld->base.type);
uint swizzle = tgsi_util_get_src_register_swizzle(indirect_reg, x);
LLVMValueRef vec4 = lp_build_const_int_vec(bld->int_bld.type, 4);
LLVMValueRef addr_vec;
addr_vec = LLVMBuildLoad(bld->base.builder,
bld->addr[indirect_reg->Index][swizzle],
"load addr reg");
/* for indexing we want integers */
addr_vec = LLVMBuildFPToSI(bld->base.builder, addr_vec,
int_vec_type, "");
/* addr_vec = addr_vec * 4 */
addr_vec = lp_build_mul(&bld->base, addr_vec, vec4);
return addr_vec;
}
/**
* Register fetch.
*/
@ -481,29 +513,7 @@ emit_fetch(
}
if (reg->Register.Indirect) {
/*
* Compute addr_vec: a vector of offsets into the register file
* from which we need to gather elements. Recall that the ADDR
* register's elements can all be different.
*/
LLVMTypeRef int_vec_type = lp_build_int_vec_type(bld->base.type);
unsigned swizzle = tgsi_util_get_src_register_swizzle( &reg->Indirect, chan_index );
LLVMValueRef vec4 = lp_build_const_int_vec(bld->int_bld.type, 4);
assert(bld->has_indirect_addressing);
addr_vec = LLVMBuildLoad(bld->base.builder,
bld->addr[reg->Indirect.Index][swizzle],
"load addr");
/* for indexing we want integers */
addr_vec = LLVMBuildFPToSI(bld->base.builder, addr_vec,
int_vec_type, "");
/* addr_vec = addr_vec * 4 */
addr_vec = lp_build_mul(&bld->base, addr_vec, vec4);
addr_vec = get_indirect_offsets(bld, &reg->Indirect);
}
switch (reg->Register.File) {
@ -741,6 +751,7 @@ emit_store(
}
if (reg->Register.Indirect) {
/* XXX use get_indirect_offsets() here eventually */
LLVMTypeRef int_vec_type = lp_build_int_vec_type(bld->base.type);
unsigned swizzle = tgsi_util_get_src_register_swizzle( &reg->Indirect, chan_index );
addr = LLVMBuildLoad(bld->base.builder,