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mary.bennett@embecosm.com Subject: [PATCH v2 3/3] RISC-V: Add support for XCVbi extension in CV32E40P Date: Mon, 13 Nov 2023 13:35:30 +0000 Message-Id: <20231113133530.1727444-4-mary.bennett@embecosm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231113133530.1727444-1-mary.bennett@embecosm.com> References: <20231108110914.2710021-1-mary.bennett@embecosm.com> <20231113133530.1727444-1-mary.bennett@embecosm.com> MIME-Version: 1.0 X-Spam-Status: No, score=-11.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Spec: github.com/openhwgroup/core-v-sw/blob/master/specifications/corev-builtin-spec.md Contributors: Mary Bennett Nandni Jamnadas Pietra Ferreira Charlie Keaney Jessica Mills Craig Blackmore Simon Cook Jeremy Bennett Helene Chelin gcc/ChangeLog: * common/config/riscv/riscv-common.cc: Create XCVbi extension support. * config/riscv/riscv.opt: Likewise. * config/riscv/corev.md: Implement cv_branch pattern for cv.beqimm and cv.bneimm. * config/riscv/riscv.md: Change pattern priority so corev.md patterns run before riscv.md patterns. * config/riscv/constraints.md: Implement constraints cv_bi_s5 - signed 5-bit immediate. * config/riscv/predicates.md: Implement predicate const_int5s_operand - signed 5 bit immediate. * doc/sourcebuild.texi: Add XCVbi documentation. gcc/testsuite/ChangeLog: * gcc.target/riscv/cv-bi-beqimm-compile-1.c: New test. * gcc.target/riscv/cv-bi-beqimm-compile-2.c: New test. * gcc.target/riscv/cv-bi-bneimm-compile-1.c: New test. * gcc.target/riscv/cv-bi-bneimm-compile-2.c: New test. * lib/target-supports.exp: Add proc for XCVbi. --- gcc/common/config/riscv/riscv-common.cc | 2 + gcc/config/riscv/constraints.md | 6 +++ gcc/config/riscv/corev.md | 14 ++++++ gcc/config/riscv/predicates.md | 4 ++ gcc/config/riscv/riscv.md | 11 ++++- gcc/config/riscv/riscv.opt | 2 + gcc/doc/sourcebuild.texi | 3 ++ .../gcc.target/riscv/cv-bi-beqimm-compile-1.c | 17 +++++++ .../gcc.target/riscv/cv-bi-beqimm-compile-2.c | 48 +++++++++++++++++++ .../gcc.target/riscv/cv-bi-bneimm-compile-1.c | 17 +++++++ .../gcc.target/riscv/cv-bi-bneimm-compile-2.c | 48 +++++++++++++++++++ gcc/testsuite/lib/target-supports.exp | 13 +++++ 12 files changed, 184 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-1.c create mode 100644 gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-2.c create mode 100644 gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-1.c create mode 100644 gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-2.c diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc index 6a1978bd0e4..04631e007f0 100644 --- a/gcc/common/config/riscv/riscv-common.cc +++ b/gcc/common/config/riscv/riscv-common.cc @@ -313,6 +313,7 @@ static const struct riscv_ext_version riscv_ext_version_table[] = {"xcvmac", ISA_SPEC_CLASS_NONE, 1, 0}, {"xcvalu", ISA_SPEC_CLASS_NONE, 1, 0}, {"xcvelw", ISA_SPEC_CLASS_NONE, 1, 0}, + {"xcvbi", ISA_SPEC_CLASS_NONE, 1, 0}, {"xtheadba", ISA_SPEC_CLASS_NONE, 1, 0}, {"xtheadbb", ISA_SPEC_CLASS_NONE, 1, 0}, @@ -1669,6 +1670,7 @@ static const riscv_ext_flag_table_t riscv_ext_flag_table[] = {"xcvmac", &gcc_options::x_riscv_xcv_subext, MASK_XCVMAC}, {"xcvalu", &gcc_options::x_riscv_xcv_subext, MASK_XCVALU}, {"xcvelw", &gcc_options::x_riscv_xcv_subext, MASK_XCVELW}, + {"xcvbi", &gcc_options::x_riscv_xcv_subext, MASK_XCVBI}, {"xtheadba", &gcc_options::x_riscv_xthead_subext, MASK_XTHEADBA}, {"xtheadbb", &gcc_options::x_riscv_xthead_subext, MASK_XTHEADBB}, diff --git a/gcc/config/riscv/constraints.md b/gcc/config/riscv/constraints.md index 2711efe68c5..718b4bd77df 100644 --- a/gcc/config/riscv/constraints.md +++ b/gcc/config/riscv/constraints.md @@ -247,3 +247,9 @@ (and (match_code "const_int") (and (match_test "IN_RANGE (ival, 0, 1073741823)") (match_test "exact_log2 (ival + 1) != -1")))) + +(define_constraint "CV_bi_sign5" + "@internal + A 5-bit signed immediate for CORE-V Immediate Branch." + (and (match_code "const_int") + (match_test "IN_RANGE (ival, -16, 15)"))) diff --git a/gcc/config/riscv/corev.md b/gcc/config/riscv/corev.md index 92bf0b5d6a6..f6a1f916d7e 100644 --- a/gcc/config/riscv/corev.md +++ b/gcc/config/riscv/corev.md @@ -706,3 +706,17 @@ [(set_attr "type" "load") (set_attr "mode" "SI")]) + +;; XCVBI Builtins +(define_insn "cv_branch" + [(set (pc) + (if_then_else + (match_operator 1 "equality_operator" + [(match_operand:X 2 "register_operand" "r") + (match_operand:X 3 "const_int5s_operand" "CV_bi_sign5")]) + (label_ref (match_operand 0 "" "")) + (pc)))] + "TARGET_XCVBI" + "cv.b%C1imm\t%2,%3,%0" + [(set_attr "type" "branch") + (set_attr "mode" "none")]) diff --git a/gcc/config/riscv/predicates.md b/gcc/config/riscv/predicates.md index a37d035fa61..69a6319c2c8 100644 --- a/gcc/config/riscv/predicates.md +++ b/gcc/config/riscv/predicates.md @@ -400,6 +400,10 @@ (ior (match_operand 0 "register_operand") (match_code "const_int"))) +(define_predicate "const_int5s_operand" + (and (match_code "const_int") + (match_test "IN_RANGE (INTVAL (op), -16, 15)"))) + ;; Predicates for the V extension. (define_special_predicate "vector_length_operand" (ior (match_operand 0 "pmode_register_operand") diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md index ae2217d0907..9a8572e6ef3 100644 --- a/gcc/config/riscv/riscv.md +++ b/gcc/config/riscv/riscv.md @@ -579,6 +579,16 @@ (define_asm_attributes [(set_attr "type" "multi")]) +;; .............................. +;; +;; Machine Description Patterns +;; +;; .............................. + +;; To encourage the use of CORE-V specific branch instructions, the CORE-V +;; instructions must be defined before the generic RISC-V instructions. +(include "corev.md") + ;; Ghost instructions produce no real code and introduce no hazards. ;; They exist purely to express an effect on dataflow. (define_insn_reservation "ghost" 0 @@ -3632,4 +3642,3 @@ (include "vector.md") (include "zicond.md") (include "zc.md") -(include "corev.md") diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt index 0eac6d44fae..d06c0f8f416 100644 --- a/gcc/config/riscv/riscv.opt +++ b/gcc/config/riscv/riscv.opt @@ -413,6 +413,8 @@ Mask(XCVALU) Var(riscv_xcv_subext) Mask(XCVELW) Var(riscv_xcv_subext) +Mask(XCVBI) Var(riscv_xcv_subext) + TargetVariable int riscv_xthead_subext diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi index 06a6d1776ff..6fee1144238 100644 --- a/gcc/doc/sourcebuild.texi +++ b/gcc/doc/sourcebuild.texi @@ -2484,6 +2484,9 @@ Test system has support for the CORE-V ALU extension. @item cv_elw Test system has support for the CORE-V ELW extension. +@item cv_bi +Test system has support for the CORE-V BI extension. + @end table @subsubsection Other hardware attributes diff --git a/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-1.c b/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-1.c new file mode 100644 index 00000000000..5b6ba5b8ae6 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-1.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target cv_bi } */ +/* { dg-options "-march=rv32i_xcvbi -mabi=ilp32" } */ +/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */ + +/* __builtin_expect is used to provide the compiler with + branch prediction information and to direct the compiler + to the expected flow through the code. */ + +int +foo1 (int a, int x, int y) +{ + a = __builtin_expect (a, 12); + return a != 10 ? x : y; +} + +/* { dg-final { scan-assembler-times "cv\\.beqimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),10,\(\?\:.L\[0-9\]\)" 1 } } */ diff --git a/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-2.c b/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-2.c new file mode 100644 index 00000000000..bb2e5843957 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/cv-bi-beqimm-compile-2.c @@ -0,0 +1,48 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target cv_bi } */ +/* { dg-options "-march=rv32i_xcvbi -mabi=ilp32" } */ +/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */ + +/* __builtin_expect is used to provide the compiler with + branch prediction information and to direct the compiler + to the expected flow through the code. */ + +int +foo1 (int a, int x, int y) +{ + a = __builtin_expect (a, 10); + return a != -16 ? x : y; +} + +int +foo2 (int a, int x, int y) +{ + a = __builtin_expect (a, 10); + return a != 0 ? x : y; +} + +int +foo3 (int a, int x, int y) +{ + a = __builtin_expect (a, 10); + return a != 15 ? x : y; +} + +int +foo4 (int a, int x, int y) +{ + a = __builtin_expect (a, 10); + return a != -17 ? x : y; +} + +int +foo5 (int a, int x, int y) +{ + a = __builtin_expect (a, 10); + return a != 16 ? x : y; +} + +/* { dg-final { scan-assembler-times "cv\\.beqimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),-16,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "cv\\.beqimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),0,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "cv\\.beqimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),15,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "beq\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),\(\?\:.L\[0-9\]+\)" 2 } } */ diff --git a/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-1.c b/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-1.c new file mode 100644 index 00000000000..21eab38a08d --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-1.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target cv_bi } */ +/* { dg-options "-march=rv32i_xcvbi -mabi=ilp32" } */ +/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */ + +/* __builtin_expect is used to provide the compiler with + branch prediction information and to direct the compiler + to the expected flow through the code. */ + +int +foo1(int a, int x, int y) +{ + a = __builtin_expect(a, 10); + return a == 10 ? x : y; +} + +/* { dg-final { scan-assembler-times "cv\\.bneimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),10,\(\?\:.L\[0-9\]\)" 1 } } */ diff --git a/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-2.c b/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-2.c new file mode 100644 index 00000000000..a028f684489 --- /dev/null +++ b/gcc/testsuite/gcc.target/riscv/cv-bi-bneimm-compile-2.c @@ -0,0 +1,48 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target cv_bi } */ +/* { dg-options "-march=rv32i_xcvbi -mabi=ilp32" } */ +/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */ + +/* __builtin_expect is used to provide the compiler with + branch prediction information and to direct the compiler + to the expected flow through the code. */ + +int +foo1(int a, int x, int y) +{ + a = __builtin_expect(a, -16); + return a == -16 ? x : y; +} + +int +foo2(int a, int x, int y) +{ + a = __builtin_expect(a, 0); + return a == 0 ? x : y; +} + +int +foo3(int a, int x, int y) +{ + a = __builtin_expect(a, 15); + return a == 15 ? x : y; +} + +int +foo4(int a, int x, int y) +{ + a = __builtin_expect(a, -17); + return a == -17 ? x : y; +} + +int +foo5(int a, int x, int y) +{ + a = __builtin_expect(a, 16); + return a == 16 ? x : y; +} + +/* { dg-final { scan-assembler-times "cv\\.bneimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),-16,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "cv\\.bneimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),0,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "cv\\.bneimm\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),15,\(\?\:.L\[0-9\]\)" 1 } } */ +/* { dg-final { scan-assembler-times "bne\t\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),\(\?\:t\[0-6\]\|a\[0-7\]\|s\[1-11\]\),\(\?\:.L\[0-9\]+\)" 2 } } */ diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp index f388360ae56..0eae746e848 100644 --- a/gcc/testsuite/lib/target-supports.exp +++ b/gcc/testsuite/lib/target-supports.exp @@ -13098,6 +13098,19 @@ proc check_effective_target_cv_elw { } { } "-march=rv32i_xcvelw" ] } +# Return 1 if the CORE-V BI extension is available +proc check_effective_target_cv_bi { } { + if { !([istarget riscv*-*-*]) } { + return 0 + } + return [check_no_compiler_messages cv_bi object { + void foo (void) + { + asm ("cv.beqimm t0, -16, foo"); + } + } "-march=rv32i_xcvbi" ] +} + proc check_effective_target_loongarch_sx { } { return [check_no_compiler_messages loongarch_lsx assembly { #if !defined(__loongarch_sx)