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| author | Jason Ekstrand <jason.ekstrand@intel.com> | 2016-03-25 11:13:40 -0700 |
|---|---|---|
| committer | Jason Ekstrand <jason.ekstrand@intel.com> | 2016-04-13 15:44:00 -0700 |
| commit | 745b3d295e0c432b95d43f979c74f9e91baaf6de (patch) | |
| tree | 00f4c8721eb876bde18f860ebf64c493c59b40a6 /src/compiler/nir/nir_opcodes.py | |
| parent | d880c6f9f59dac7cfe33713fff1c09c63ab7fb4f (diff) | |
| download | external_mesa3d-745b3d295e0c432b95d43f979c74f9e91baaf6de.zip external_mesa3d-745b3d295e0c432b95d43f979c74f9e91baaf6de.tar.gz external_mesa3d-745b3d295e0c432b95d43f979c74f9e91baaf6de.tar.bz2 | |
nir: Add more modulus opcodes
These are all needed for SPIR-V
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'src/compiler/nir/nir_opcodes.py')
| -rw-r--r-- | src/compiler/nir/nir_opcodes.py | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py index 9f62e08..e75ca28 100644 --- a/src/compiler/nir/nir_opcodes.py +++ b/src/compiler/nir/nir_opcodes.py @@ -443,9 +443,23 @@ binop_convert("uadd_carry", tuint, tuint, commutative, "src0 + src1 < src0") binop_convert("usub_borrow", tuint, tuint, "", "src0 < src1") -binop("fmod", tfloat, "", "src0 - src1 * floorf(src0 / src1)") binop("umod", tuint, "", "src1 == 0 ? 0 : src0 % src1") +# For signed integers, there are several different possible definitions of +# "modulus" or "remainder". We follow the conventions used by LLVM and +# SPIR-V. The irem opcode implements the standard C/C++ signed "%" +# operation while the imod opcode implements the more mathematical +# "modulus" operation. For details on the difference, see +# +# http://mathforum.org/library/drmath/view/52343.html + +binop("irem", tint, "", "src1 == 0 ? 0 : src0 % src1") +binop("imod", tint, "", + "src1 == 0 ? 0 : ((src0 % src1 == 0 || (src0 >= 0) == (src1 >= 0)) ?" + " src0 % src1 : src0 % src1 + src1)") +binop("fmod", tfloat, "", "src0 - src1 * floorf(src0 / src1)") +binop("frem", tfloat, "", "src0 - src1 * truncf(src0 / src1)") + # # Comparisons # |