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llvmpipe: comments and LLVMValueRef naming

This commit is contained in:
Brian Paul 2010-01-13 09:31:36 -07:00
parent 212f3a6cb3
commit 4439aab7b7
1 changed files with 7 additions and 0 deletions
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7
src/gallium/drivers/llvmpipe/lp_bld_arit.c
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@ -874,6 +874,9 @@ lp_build_iround(struct lp_build_context *bld,
}
/**
* Convert float[] to int[] with floor().
*/
LLVMValueRef
lp_build_ifloor(struct lp_build_context *bld,
LLVMValueRef a)
@ -900,6 +903,7 @@ lp_build_ifloor(struct lp_build_context *bld,
sign = LLVMBuildBitCast(bld->builder, a, int_vec_type, "");
sign = LLVMBuildAnd(bld->builder, sign, mask, "");
sign = LLVMBuildAShr(bld->builder, sign, lp_build_int_const_scalar(type, type.width - 1), "");
lp_build_name(sign, "floor.sign");
/* offset = -0.99999(9)f */
offset = lp_build_const_scalar(type, -(double)(((unsigned long long)1 << mantissa) - 1)/((unsigned long long)1 << mantissa));
@ -908,11 +912,14 @@ lp_build_ifloor(struct lp_build_context *bld,
/* offset = a < 0 ? -0.99999(9)f : 0.0f */
offset = LLVMBuildAnd(bld->builder, offset, sign, "");
offset = LLVMBuildBitCast(bld->builder, offset, vec_type, "");
lp_build_name(offset, "floor.offset");
res = LLVMBuildAdd(bld->builder, a, offset, "");
lp_build_name(res, "floor.res");
}
res = LLVMBuildFPToSI(bld->builder, res, int_vec_type, "");
lp_build_name(res, "floor");
return res;
}