6f8a54b6a5
Changes: * Adds a new generic instruction, SELECTIF, that does value selection (a la conditional move) similarly to existing SELECT, except that it is controlled by condition code input and flags-register inputs. * Adds a new Intel x86_64 variant, 'baseline', that supports SSE2 and nothing else. * Adds new Intel x86_64 instructions BSR and BSF. * Implements generic CLZ, CTZ and POPCOUNT on x86_64 'baseline' targets using the new BSR, BSF and SELECTIF instructions. * Implements SELECTIF on x86_64 targets using conditional-moves. * new test filetests/isa/intel/baseline_clz_ctz_popcount.cton (for legalization) * new test filetests/isa/intel/baseline_clz_ctz_popcount_encoding.cton (for encoding) * Allow lib/cretonne/meta/gen_legalizer.py to generate non-snake-caseified Rust without rustc complaining. Fixes #238.
105 lines
1.6 KiB
Plaintext
105 lines
1.6 KiB
Plaintext
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test compile
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set is_64bit
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isa intel baseline
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; clz/ctz on 64 bit operands
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function %i64_clz(i64) -> i64 {
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ebb0(v10: i64):
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v11 = clz v10
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; check: x86_bsr
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; check: selectif.i64
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return v11
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}
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function %i64_ctz(i64) -> i64 {
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ebb1(v20: i64):
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v21 = ctz v20
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; check: x86_bsf
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; check: selectif.i64
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return v21
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}
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; clz/ctz on 32 bit operands
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function %i32_clz(i32) -> i32 {
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ebb0(v10: i32):
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v11 = clz v10
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; check: x86_bsr
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; check: selectif.i32
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return v11
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}
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function %i32_ctz(i32) -> i32 {
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ebb1(v20: i32):
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v21 = ctz v20
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; check: x86_bsf
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; check: selectif.i32
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return v21
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}
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; popcount on 64 bit operands
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function %i64_popcount(i64) -> i64 {
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ebb0(v30: i64):
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v31 = popcnt v30;
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; check: iconst.i32
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; check: ushr
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; check: iconst.i64
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: iadd
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; check: iconst.i64
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; check: band
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; check: iconst.i64
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; check: imul
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; check: iconst.i32
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; check: ushr
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return v31;
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}
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; popcount on 32 bit operands
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function %i32_popcount(i32) -> i32 {
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ebb0(v40: i32):
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v41 = popcnt v40;
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; check: iconst.i32
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; check: ushr
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; check: iconst.i32
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: band
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; check: isub
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; check: iconst.i32
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; check: ushr
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; check: iadd
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; check: iconst.i32
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; check: band
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; check: iconst.i32
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; check: imul
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; check: iconst.i32
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; check: ushr
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return v41;
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}
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