| Message ID | 20240701024623.1265028-1-richard.henderson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | tcg/optimize: Fix TCG_COND_TST* simplification of setcond2 | expand |
Richard Henderson <richard.henderson@linaro.org> writes: > Fix a typo in the argument movement. > > Cc: qemu-stable@nongnu.org > Fixes: ceb9ee06b71 ("tcg/optimize: Handle TCG_COND_TST{EQ,NE}") > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2413 > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > tcg/optimize.c | 2 +- > tests/tcg/x86_64/test-2413.c | 30 ++++++++++++++++++++++++++++++ > 2 files changed, 31 insertions(+), 1 deletion(-) > create mode 100644 tests/tcg/x86_64/test-2413.c > > diff --git a/tcg/optimize.c b/tcg/optimize.c > index 8886f7037a..ba16ec27e2 100644 > --- a/tcg/optimize.c > +++ b/tcg/optimize.c > @@ -2384,7 +2384,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op) > > case TCG_COND_TSTEQ: > case TCG_COND_TSTNE: > - if (arg_is_const_val(op->args[2], 0)) { > + if (arg_is_const_val(op->args[3], 0)) { > goto do_setcond_high; > } > if (arg_is_const_val(op->args[4], 0)) { > diff --git a/tests/tcg/x86_64/test-2413.c b/tests/tcg/x86_64/test-2413.c > new file mode 100644 > index 0000000000..a0e4d25093 > --- /dev/null > +++ b/tests/tcg/x86_64/test-2413.c > @@ -0,0 +1,30 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* Copyright 2024 Linaro, Ltd. */ > +/* See https://gitlab.com/qemu-project/qemu/-/issues/2413 */ > + > +#include <assert.h> This also needs: X86_64_TESTS += test-2413 in the Makefile. > + > +void test(unsigned long *a, unsigned long *d, unsigned long c) > +{ > + asm("xorl %%eax, %%eax\n\t" > + "xorl %%edx, %%edx\n\t" > + "testb $0x20, %%cl\n\t" > + "sete %%al\n\t" > + "setne %%dl\n\t" > + "shll %%cl, %%eax\n\t" > + "shll %%cl, %%edx\n\t" > + : "=a"(*a), "=d"(*d) > + : "c"(c)); > +} > + > +int main(void) > +{ > + long a, c, d; > + > + for (c = 0; c < 64; c++) { > + test(&a, &d, c); > + assert(a == (c & 0x20 ? 0 : 1u << (c & 0x1f))); > + assert(d == (c & 0x20 ? 1u << (c & 0x1f) : 0)); > + } > + return 0; > +}
Richard Henderson <richard.henderson@linaro.org> writes: > Fix a typo in the argument movement. > > Cc: qemu-stable@nongnu.org > Fixes: ceb9ee06b71 ("tcg/optimize: Handle TCG_COND_TST{EQ,NE}") > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2413 > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > tcg/optimize.c | 2 +- > tests/tcg/x86_64/test-2413.c | 30 ++++++++++++++++++++++++++++++ > 2 files changed, 31 insertions(+), 1 deletion(-) > create mode 100644 tests/tcg/x86_64/test-2413.c > > diff --git a/tcg/optimize.c b/tcg/optimize.c > index 8886f7037a..ba16ec27e2 100644 > --- a/tcg/optimize.c > +++ b/tcg/optimize.c > @@ -2384,7 +2384,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op) > > case TCG_COND_TSTEQ: > case TCG_COND_TSTNE: > - if (arg_is_const_val(op->args[2], 0)) { > + if (arg_is_const_val(op->args[3], 0)) { > goto do_setcond_high; > } > if (arg_is_const_val(op->args[4], 0)) { > diff --git a/tests/tcg/x86_64/test-2413.c b/tests/tcg/x86_64/test-2413.c > new file mode 100644 > index 0000000000..a0e4d25093 > --- /dev/null > +++ b/tests/tcg/x86_64/test-2413.c > @@ -0,0 +1,30 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* Copyright 2024 Linaro, Ltd. */ > +/* See https://gitlab.com/qemu-project/qemu/-/issues/2413 */ > + > +#include <assert.h> > + > +void test(unsigned long *a, unsigned long *d, unsigned long c) > +{ > + asm("xorl %%eax, %%eax\n\t" > + "xorl %%edx, %%edx\n\t" > + "testb $0x20, %%cl\n\t" > + "sete %%al\n\t" > + "setne %%dl\n\t" > + "shll %%cl, %%eax\n\t" > + "shll %%cl, %%edx\n\t" > + : "=a"(*a), "=d"(*d) > + : "c"(c)); > +} > + > +int main(void) > +{ > + long a, c, d; The compiler complains about the mismatch between long and the unsigned long of the test function. Anyway dropping the previous fix and just using this: Tested-by: Alex Bennée <alex.bennee@linaro.org> > + > + for (c = 0; c < 64; c++) { > + test(&a, &d, c); > + assert(a == (c & 0x20 ? 0 : 1u << (c & 0x1f))); > + assert(d == (c & 0x20 ? 1u << (c & 0x1f) : 0)); > + } > + return 0; > +}
diff --git a/tcg/optimize.c b/tcg/optimize.c index 8886f7037a..ba16ec27e2 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -2384,7 +2384,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op) case TCG_COND_TSTEQ: case TCG_COND_TSTNE: - if (arg_is_const_val(op->args[2], 0)) { + if (arg_is_const_val(op->args[3], 0)) { goto do_setcond_high; } if (arg_is_const_val(op->args[4], 0)) { diff --git a/tests/tcg/x86_64/test-2413.c b/tests/tcg/x86_64/test-2413.c new file mode 100644 index 0000000000..a0e4d25093 --- /dev/null +++ b/tests/tcg/x86_64/test-2413.c @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* Copyright 2024 Linaro, Ltd. */ +/* See https://gitlab.com/qemu-project/qemu/-/issues/2413 */ + +#include <assert.h> + +void test(unsigned long *a, unsigned long *d, unsigned long c) +{ + asm("xorl %%eax, %%eax\n\t" + "xorl %%edx, %%edx\n\t" + "testb $0x20, %%cl\n\t" + "sete %%al\n\t" + "setne %%dl\n\t" + "shll %%cl, %%eax\n\t" + "shll %%cl, %%edx\n\t" + : "=a"(*a), "=d"(*d) + : "c"(c)); +} + +int main(void) +{ + long a, c, d; + + for (c = 0; c < 64; c++) { + test(&a, &d, c); + assert(a == (c & 0x20 ? 0 : 1u << (c & 0x1f))); + assert(d == (c & 0x20 ? 1u << (c & 0x1f) : 0)); + } + return 0; +}
Fix a typo in the argument movement. Cc: qemu-stable@nongnu.org Fixes: ceb9ee06b71 ("tcg/optimize: Handle TCG_COND_TST{EQ,NE}") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2413 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- tcg/optimize.c | 2 +- tests/tcg/x86_64/test-2413.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 1 deletion(-) create mode 100644 tests/tcg/x86_64/test-2413.c