Thanks for the patch! I've had a quick look, and everything looks okay so far.
On Mon, Sep 7, 2026 at 1:56 PM Shreesh Adiga <[email protected]> wrote: > From: Mariam Arutunian <[email protected]> > > This patch introduces pclmul expanders for the i386 backend, > dedicated to generating optimized code for CRC computations. > > Expander 1: Bit-Forward CRC (crc<SWI1248x:mode><SWI124:mode>4) > For targets that support both pclmulqdq instruction (TARGET_PCLMUL) and are > 64-bit (TARGET_64BIT), > the expander will generate code that uses the pclmulqdq instruction for CRC > computation. > > Expander 2: Bit-Reversed CRC (crc_rev<SWI1248x:mode><SWI124:mode>4) > If the target does not support crc32 but supports pclmulqdq, it then uses > the pclmulqdq instruction for bit-reversed CRC computation. > > This makes the x86 backend similar to aarch64 which uses pmull. > This is based on earlier submitted patch which was not merged for x86: > https://gcc.gnu.org/pipermail/gcc-patches/2024-November/668248.html > > gcc/ChangeLog: > > * config/i386/i386-expand.cc (ix86_expand_crc_using_pclmul): New > function that implements pclmul expansion for Bit-Forward CRC > computation. > (ix86_expand_reversed_crc_using_pclmul): New function that > implements pclmul expansion for Bit-Reversed CRC computation. > * config/i386/i386-protos.h (ix86_expand_crc_using_pclmul): New > extern function declaration. > (ix86_expand_reversed_crc_using_pclmul): Likewise. > * config/i386/i386.md (crc_rev<SWI124:mode>si4): Removed older > expansion for Bit-Reversed CRC. > (crc<SWI1248x:mode><SWI124:mode>4): Added new expander for > Bit-Forward CRC. > (crc_rev<SWI1248x:mode><SWI124:mode>4): Added new expander for > Bit-Reversed CRC which extends previous CRC32 expansion. > > gcc/testsuite/ChangeLog: > > * gcc.target/i386/crc-1-pclmul.c: New test. > * gcc.target/i386/crc-10-pclmul.c: New test. > * gcc.target/i386/crc-12-pclmul.c: New test. > * gcc.target/i386/crc-13-pclmul.c: New test. > * gcc.target/i386/crc-14-pclmul.c: New test. > * gcc.target/i386/crc-17-pclmul.c: New test. > * gcc.target/i386/crc-18-pclmul.c: New test. > * gcc.target/i386/crc-21-pclmul.c: New test. > * gcc.target/i386/crc-22-pclmul.c: New test. > * gcc.target/i386/crc-23-pclmul.c: New test. > * gcc.target/i386/crc-4-pclmul.c: New test. > * gcc.target/i386/crc-5-pclmul.c: New test. > * gcc.target/i386/crc-6-pclmul.c: New test. > * gcc.target/i386/crc-7-pclmul.c: New test. > * gcc.target/i386/crc-8-pclmul.c: New test. > * gcc.target/i386/crc-9-pclmul.c: New test. > * gcc.target/i386/crc-CCIT-data16-pclmul.c: New test. > * gcc.target/i386/crc-CCIT-data8-pclmul.c: New test. > * gcc.target/i386/crc-coremark-16bitdata-pclmul.c: New test. > * gcc.target/i386/crc-crc32-data16.c: New test. > * gcc.target/i386/crc-crc32-data32.c: New test. > * gcc.target/i386/crc-crc32-data8.c: New test. > > Co-authored-by: Shreesh Adiga <[email protected]> > Signed-off-by: Shreesh Adiga <[email protected]> > --- > gcc/config/i386/i386-expand.cc | 133 ++++++++++++++++++ > gcc/config/i386/i386-protos.h | 3 + > gcc/config/i386/i386.md | 53 +++++-- > gcc/testsuite/gcc.target/i386/crc-1-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-10-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-12-pclmul.c | 9 ++ > gcc/testsuite/gcc.target/i386/crc-13-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-14-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-17-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-18-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-21-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-22-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-23-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-4-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-5-pclmul.c | 9 ++ > gcc/testsuite/gcc.target/i386/crc-6-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-7-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-8-pclmul.c | 8 ++ > gcc/testsuite/gcc.target/i386/crc-9-pclmul.c | 8 ++ > .../gcc.target/i386/crc-CCIT-data16-pclmul.c | 9 ++ > .../gcc.target/i386/crc-CCIT-data8-pclmul.c | 9 ++ > .../i386/crc-coremark-16bitdata-pclmul.c | 9 ++ > .../gcc.target/i386/crc-crc32-data16.c | 53 +++++++ > .../gcc.target/i386/crc-crc32-data32.c | 53 +++++++ > .../gcc.target/i386/crc-crc32-data8.c | 53 +++++++ > 25 files changed, 492 insertions(+), 13 deletions(-) > create mode 100644 gcc/testsuite/gcc.target/i386/crc-1-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-10-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-12-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-13-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-14-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-17-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-18-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-21-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-22-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-23-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-4-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-5-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-6-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-7-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-8-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-9-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-CCIT-data16-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-CCIT-data8-pclmul.c > create mode 100644 > gcc/testsuite/gcc.target/i386/crc-coremark-16bitdata-pclmul.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-crc32-data16.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-crc32-data32.c > create mode 100644 gcc/testsuite/gcc.target/i386/crc-crc32-data8.c > > diff --git a/gcc/config/i386/i386-expand.cc > b/gcc/config/i386/i386-expand.cc > index fb4224af0da..6010892e3dc 100644 > --- a/gcc/config/i386/i386-expand.cc > +++ b/gcc/config/i386/i386-expand.cc > @@ -29917,4 +29917,137 @@ ix86_expand_lcp_stall_peephole (rtx_insn *insn, > rtx *operands, > emit_insn (set); > } > > +/* Generate assembly to calculate CRC using pclmulqdq instruction. > + OPERANDS[1] is input CRC, > + OPERANDS[2] is data (message), > + OPERANDS[3] is the polynomial without the leading 1. */ > + > +void > +ix86_expand_crc_using_pclmul (scalar_mode crc_mode, > + scalar_mode data_mode, > + rtx *operands) > +{ > + /* Check and keep arguments. */ > + gcc_assert (!CONST_INT_P (operands[0])); > + gcc_assert (CONST_INT_P (operands[3])); > + rtx crc = operands[1]; > + rtx data = operands[2]; > + rtx polynomial = operands[3]; > + > + unsigned HOST_WIDE_INT crc_size = GET_MODE_BITSIZE (crc_mode); > + unsigned HOST_WIDE_INT data_size = GET_MODE_BITSIZE (data_mode); > + gcc_assert (crc_size <= 32); > + gcc_assert (data_size <= crc_size); > + > + /* Calculate the quotient. */ > + unsigned HOST_WIDE_INT > + q = gf2n_poly_long_div_quotient (UINTVAL (polynomial), crc_size); > + > + if (crc_size > data_size) > + crc = expand_shift (RSHIFT_EXPR, DImode, crc, crc_size - data_size, > + NULL_RTX, 1); > + > + /* Keep the quotient in V2DImode. */ > + rtx q_v2di = gen_reg_rtx (V2DImode); > + rtx quotient = force_reg (DImode, gen_int_mode (q, DImode)); > + emit_insn (gen_vec_concatv2di (q_v2di, quotient, const0_rtx)); > + > + /* crc ^ data and keep in V2DImode. */ > + rtx cd_xor = expand_binop (DImode, xor_optab, crc, data, NULL_RTX, 1, > + OPTAB_WIDEN); > + rtx res = gen_reg_rtx (V2DImode); > + emit_insn (gen_vec_concatv2di (res, cd_xor, const0_rtx)); > + /* Perform carry-less multiplication. */ > + emit_insn (gen_pclmulqdq (res, res, q_v2di, gen_int_mode (0, SImode))); > + > + res = expand_shift (RSHIFT_EXPR, V2DImode, res, crc_size, NULL_RTX, 1); > + > + /* Keep the polynomial in V2DImode. */ > + polynomial = simplify_gen_unary (ZERO_EXTEND, DImode, polynomial, > + GET_MODE (polynomial)); > + rtx t1 = force_reg (DImode, polynomial); > + rtx p_v2di = gen_reg_rtx (V2DImode); > + emit_insn (gen_vec_concatv2di (p_v2di, t1, const0_rtx)); > + > + /* Perform carry-less multiplication and get low part. */ > + emit_insn (gen_pclmulqdq (res, res, p_v2di, gen_int_mode (0, SImode))); > + rtx crc_part = gen_reg_rtx (DImode); > + emit_insn (gen_vec_extractv2didi (crc_part, res, const0_rtx)); > + > + if (crc_size > data_size) > + { > + rtx shift = expand_shift (LSHIFT_EXPR, DImode, operands[1], > data_size, > + NULL_RTX, 1); > + crc_part = expand_binop (DImode, xor_optab, crc_part, shift, > NULL_RTX, 1, > + OPTAB_DIRECT); > + } > + emit_move_insn (operands[0], gen_lowpart (crc_mode, crc_part)); > +} > + > +/* Generate assembly to calculate reversed CRC using pclmulqdq > instruction. > + OPERANDS[1] is input CRC, > + OPERANDS[2] is data (message), > + OPERANDS[3] is the polynomial without the leading 1. */ > + > +void > +ix86_expand_reversed_crc_using_pclmul (scalar_mode crc_mode, > + scalar_mode data_mode, > + rtx *operands) > +{ > + /* Check and keep arguments. */ > + gcc_assert (!CONST_INT_P (operands[0])); > + gcc_assert (CONST_INT_P (operands[3])); > + rtx crc = operands[1]; > + rtx data = operands[2]; > + rtx polynomial = operands[3]; > + > + unsigned HOST_WIDE_INT crc_size = GET_MODE_BITSIZE (crc_mode); > + unsigned HOST_WIDE_INT data_size = GET_MODE_BITSIZE (data_mode); > + gcc_assert (crc_size <= 32); > + gcc_assert (data_size <= crc_size); > + > + /* Calculate the quotient. */ > + unsigned HOST_WIDE_INT > + q = gf2n_poly_long_div_quotient (UINTVAL (polynomial), crc_size); > + /* Reflect the calculated quotient. */ > + q = reflect_hwi (q, crc_size + 1); > + > + rtx q_v2di = gen_reg_rtx (V2DImode); > + rtx quotient = force_reg (DImode, gen_int_mode (q, DImode)); > + emit_insn (gen_vec_concatv2di (q_v2di, quotient, const0_rtx)); > + > + /* crc ^ data and keep in V2DImode. */ > + rtx cd_xor = expand_binop (DImode, xor_optab, crc, data, NULL_RTX, 1, > + OPTAB_WIDEN); > + > + /* Perform carry-less multiplication. */ > + rtx res = gen_reg_rtx (V2DImode); > + emit_insn (gen_vec_concatv2di (res, cd_xor, const0_rtx)); > + emit_insn (gen_pclmulqdq (res, res, q_v2di, gen_int_mode (0, SImode))); > + > + res = expand_shift (LSHIFT_EXPR, V2DImode, res, 64 - data_size, > NULL_RTX, 0); > + > + /* Reflect the polynomial and keep in V2DImode. */ > + unsigned HOST_WIDE_INT reflected_op3 = reflect_hwi (UINTVAL > (polynomial), > + crc_size); > + rtx ref_polynomial = force_reg (DImode, > + gen_int_mode (reflected_op3 << 1, > DImode)); > + rtx p_v2di = gen_reg_rtx (V2DImode); > + emit_insn (gen_vec_concatv2di (p_v2di, ref_polynomial, const0_rtx)); > + > + /* Perform carry-less multiplication and get high part. */ > + emit_insn (gen_pclmulqdq (res, res, p_v2di, gen_int_mode (0, SImode))); > + rtx res_high = gen_reg_rtx (DImode); > + emit_insn (gen_vec_extractv2didi (res_high, res, const1_rtx)); > + > + if (crc_size > data_size) > + { > + rtx shift = expand_shift (RSHIFT_EXPR, DImode, crc, data_size, > + NULL_RTX, 1); > + res_high = expand_binop (DImode, xor_optab, res_high, shift, > NULL_RTX, 1, > + OPTAB_DIRECT); > + } > + emit_move_insn (operands[0], gen_lowpart (crc_mode, res_high)); > +} > + > #include "gt-i386-expand.h" > diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h > index 21994d3d498..d225a8fadc2 100644 > --- a/gcc/config/i386/i386-protos.h > +++ b/gcc/config/i386/i386-protos.h > @@ -449,3 +449,6 @@ extern void ix86_set_handled_components (sbitmap); > bool ix86_check_builtin_isa_match (unsigned int, HOST_WIDE_INT*, > HOST_WIDE_INT*); > rtx ix86_vgf2p8affine_shift_matrix (rtx, rtx, enum rtx_code); > +extern void ix86_expand_crc_using_pclmul (scalar_mode, scalar_mode, rtx > *); > +extern void ix86_expand_reversed_crc_using_pclmul (scalar_mode, > scalar_mode, > + rtx *); > diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md > index 4e18797743f..7538b1f70f1 100644 > --- a/gcc/config/i386/i386.md > +++ b/gcc/config/i386/i386.md > @@ -30504,19 +30504,46 @@ (define_insn "sse4_2_crc32di" > (set_attr "prefix_extra" "1") > (set_attr "mode" "DI")]) > > -(define_expand "crc_rev<SWI124:mode>si4" > - [(match_operand:SI 0 "register_operand") > - (match_operand:SI 1 "register_operand") > - (match_operand:SWI124 2 "nonimmediate_operand") > - (match_operand:SI 3 "const_int_operand")] > - "TARGET_CRC32" > -{ > - /* crc32 uses iSCSI polynomial */ > - if (INTVAL (operands[3]) == 0x1EDC6F41) > - emit_insn (gen_sse4_2_crc32<mode> (operands[0], operands[1], > operands[2])); > - else > - expand_reversed_crc_table_based (operands[0], operands[1], > operands[2], > - operands[3], <SWI124:MODE>mode); > +;; Bit-forward CRC > +(define_expand "crc<SWI1248x:mode><SWI124:mode>4" > + [;; return value (calculated CRC) > + (match_operand:SWI124 0 "register_operand" "=r") > + ;; initial CRC > + (match_operand:SWI124 1 "register_operand" "r") > + ;; data > + (match_operand:SWI1248x 2 "register_operand" "r") > + ;; polynomial without leading 1 > + (match_operand:SWI124 3 "const_int_operand")] > + "TARGET_PCLMUL && TARGET_64BIT && <SWI124:MODE>mode >= > <SWI1248x:MODE>mode" > +{ > + ix86_expand_crc_using_pclmul (<SWI124:MODE>mode, <SWI1248x:MODE>mode, > + operands); > + DONE; > +}) > + > +;; Reversed CRC > +(define_expand "crc_rev<SWI1248x:mode><SWI124:mode>4" > + [;; return value (calculated CRC) > + (match_operand:SWI124 0 "register_operand" "=r") > + ;; initial CRC > + (match_operand:SWI124 1 "register_operand" "r") > + ;; data > + (match_operand:SWI1248x 2 "register_operand" "r") > + ;; polynomial without leading 1 > + (match_operand:SWI124 3 "const_int_operand")] > + "<SWI124:MODE>mode >= <SWI1248x:MODE>mode" > + { > + /* If it is iSCSI polynomial (0x1EDC6F41), generate crc32 > instruction. */ > + if (TARGET_CRC32 && INTVAL (operands[3]) == 0x1EDC6F41 > + && <SWI124:MODE>mode == SImode) > + emit_insn (gen_sse4_2_crc32<SWI1248x:mode> (operands[0], > operands[1], > + operands[2])); > + else if (TARGET_PCLMUL && TARGET_64BIT) > + ix86_expand_reversed_crc_using_pclmul (<SWI124:MODE>mode, > + <SWI1248x:MODE>mode, > operands); > + else > + expand_reversed_crc_table_based (operands[0], operands[1], > operands[2], > + operands[3], <SWI1248x:MODE>mode); > DONE; > }) > > diff --git a/gcc/testsuite/gcc.target/i386/crc-1-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-1-pclmul.c > new file mode 100644 > index 00000000000..21edf417f0c > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-1-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc > -fdisable-tree-phiopt2 -fdisable-tree-phiopt3" } */ > + > +#include "../../gcc.dg/torture/crc-1.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-10-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-10-pclmul.c > new file mode 100644 > index 00000000000..39bfd386d9c > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-10-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-10.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-12-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-12-pclmul.c > new file mode 100644 > index 00000000000..1ac9a6bf56d > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-12-pclmul.c > @@ -0,0 +1,9 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc > -fdisable-tree-phiopt2 -fdisable-tree-phiopt3" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include "../../gcc.dg/torture/crc-12.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-13-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-13-pclmul.c > new file mode 100644 > index 00000000000..c290539fad3 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-13-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-13.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-14-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-14-pclmul.c > new file mode 100644 > index 00000000000..cc62ee471c7 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-14-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-14.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-17-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-17-pclmul.c > new file mode 100644 > index 00000000000..660bff55e1b > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-17-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-17.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-18-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-18-pclmul.c > new file mode 100644 > index 00000000000..e54392b32a9 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-18-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-18.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-21-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-21-pclmul.c > new file mode 100644 > index 00000000000..4db1504cd49 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-21-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-21.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-22-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-22-pclmul.c > new file mode 100644 > index 00000000000..d0f27d96069 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-22-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-22.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-23-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-23-pclmul.c > new file mode 100644 > index 00000000000..666f3620597 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-23-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-23.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-4-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-4-pclmul.c > new file mode 100644 > index 00000000000..398ecaa4aba > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-4-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-4.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-5-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-5-pclmul.c > new file mode 100644 > index 00000000000..b80368e81bc > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-5-pclmul.c > @@ -0,0 +1,9 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -w -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include "../../gcc.dg/torture/crc-5.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-6-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-6-pclmul.c > new file mode 100644 > index 00000000000..20b851e3596 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-6-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-6.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-7-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-7-pclmul.c > new file mode 100644 > index 00000000000..3e5cc75338e > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-7-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-7.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-8-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-8-pclmul.c > new file mode 100644 > index 00000000000..4b1145553fc > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-8-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-8.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-9-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-9-pclmul.c > new file mode 100644 > index 00000000000..204d6c84d47 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-9-pclmul.c > @@ -0,0 +1,8 @@ > +/* { dg-do run } */ > +/* { dg-options "-mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > + > +#include "../../gcc.dg/torture/crc-9.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-CCIT-data16-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-CCIT-data16-pclmul.c > new file mode 100644 > index 00000000000..ca728120858 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-CCIT-data16-pclmul.c > @@ -0,0 +1,9 @@ > +/* { dg-do run } */ > +/* { dg-options "-w -mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include "../../gcc.dg/torture/crc-CCIT-data16.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-CCIT-data8-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-CCIT-data8-pclmul.c > new file mode 100644 > index 00000000000..816e0561d8f > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-CCIT-data8-pclmul.c > @@ -0,0 +1,9 @@ > +/* { dg-do run } */ > +/* { dg-options "-w -mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto" } } */ > + > +#include "../../gcc.dg/torture/crc-CCIT-data8.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-coremark-16bitdata-pclmul.c > b/gcc/testsuite/gcc.target/i386/crc-coremark-16bitdata-pclmul.c > new file mode 100644 > index 00000000000..817d960b0aa > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-coremark-16bitdata-pclmul.c > @@ -0,0 +1,9 @@ > +/* { dg-do run } */ > +/* { dg-options "-w -mpclmul -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include "../../gcc.dg/torture/crc-coremark16-data16.c" > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "pclmulqdq" "dfinish"} } */ > \ No newline at end of file > diff --git a/gcc/testsuite/gcc.target/i386/crc-crc32-data16.c > b/gcc/testsuite/gcc.target/i386/crc-crc32-data16.c > new file mode 100644 > index 00000000000..49ab5f31ef0 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-crc32-data16.c > @@ -0,0 +1,53 @@ > +/* { dg-do run } */ > +/* { dg-options "-mcrc32 -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include <stdint.h> > +#include <stdlib.h> > + > +__attribute__ ((noinline,optimize(0))) > +uint32_t _crc32_O0 (uint32_t crc, uint16_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 8; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +uint32_t _crc32 (uint32_t crc, uint16_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 8; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +int main () > +{ > + uint32_t crc = 0x0D800D80; > + for (uint16_t i = 0; i < 0xffff; i++) > + { > + uint32_t res1 = _crc32_O0 (crc, i); > + uint32_t res2 = _crc32 (crc, i); > + if (res1 != res2) > + abort (); > + crc = res1; > + } > +} > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "UNSPEC_CRC32" "dfinish"} } */ > +/* { dg-final { scan-rtl-dump-times "pclmulqdq" 0 "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-crc32-data32.c > b/gcc/testsuite/gcc.target/i386/crc-crc32-data32.c > new file mode 100644 > index 00000000000..08d6c193a77 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-crc32-data32.c > @@ -0,0 +1,53 @@ > +/* { dg-do run } */ > +/* { dg-options "-mcrc32 -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include <stdint.h> > +#include <stdlib.h> > + > +__attribute__ ((noinline,optimize(0))) > +uint32_t _crc32_O0 (uint32_t crc, uint32_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 32; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +uint32_t _crc32 (uint32_t crc, uint32_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 32; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +int main () > +{ > + uint32_t crc = 0x0D800D80; > + for (uint8_t i = 0; i < 0xff; i++) > + { > + uint32_t res1 = _crc32_O0 (crc, i); > + uint32_t res2 = _crc32 (crc, i); > + if (res1 != res2) > + abort (); > + crc = res1; > + } > +} > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "UNSPEC_CRC32" "dfinish"} } */ > +/* { dg-final { scan-rtl-dump-times "pclmulqdq" 0 "dfinish"} } */ > diff --git a/gcc/testsuite/gcc.target/i386/crc-crc32-data8.c > b/gcc/testsuite/gcc.target/i386/crc-crc32-data8.c > new file mode 100644 > index 00000000000..7a76b27fd28 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/i386/crc-crc32-data8.c > @@ -0,0 +1,53 @@ > +/* { dg-do run } */ > +/* { dg-options "-mcrc32 -O2 -fdump-rtl-dfinish -fdump-tree-crc" } */ > +/* { dg-skip-if "" { *-*-* } { "-flto"} } */ > + > +#include <stdint.h> > +#include <stdlib.h> > + > +__attribute__ ((noinline,optimize(0))) > +uint32_t _crc32_O0 (uint32_t crc, uint8_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 8; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +uint32_t _crc32 (uint32_t crc, uint8_t data) { > + int i; > + crc = crc ^ data; > + > + for (i = 0; i < 8; i++) { > + if (crc & 1) > + crc = (crc >> 1) ^ 0x82F63B78; > + else > + crc = (crc >> 1); > + } > + > + return crc; > +} > + > +int main () > +{ > + uint32_t crc = 0x0D800D80; > + for (uint8_t i = 0; i < 0xff; i++) > + { > + uint32_t res1 = _crc32_O0 (crc, i); > + uint32_t res2 = _crc32 (crc, i); > + if (res1 != res2) > + abort (); > + crc = res1; > + } > +} > + > +/* { dg-final { scan-tree-dump "calculates CRC!" "crc"} } */ > +/* { dg-final { scan-tree-dump-times "Couldn't generate faster CRC code." > 0 "crc"} } */ > +/* { dg-final { scan-rtl-dump "UNSPEC_CRC32" "dfinish"} } */ > +/* { dg-final { scan-rtl-dump-times "pclmulqdq" 0 "dfinish"} } */ > -- > 2.55.0 > >
