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bpf: fix generation of neg and neg32 BPF instructions

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This patch fixes GCC to generate correct neg and neg32 instructions,
which do not take a source register operand.  A couple of new tests
are added.

Tested in bpf-unknown-none.

gcc/ChangeLog

2023-07-26  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* config/bpf/bpf.md: Fix neg{SI,DI}2 insn.

gcc/testsuite/ChangeLog

2023-07-26  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* gcc.target/bpf/neg-1.c: New test.
	* gcc.target/bpf/neg-pseudoc-1.c: Likewise.
This commit is contained in:
Jose E. Marchesi 2023-07-26 12:07:30 +02:00
parent 819f3d3692
commit 590a8287bf
3 changed files with 30 additions and 2 deletions
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4
gcc/config/bpf/bpf.md
View file

@ -142,9 +142,9 @@
;;; Negation
(define_insn "neg<AM:mode>2"
[(set (match_operand:AM 0 "register_operand" "=r,r")
(neg:AM (match_operand:AM 1 "reg_or_imm_operand" " r,I")))]
(neg:AM (match_operand:AM 1 "reg_or_imm_operand" " 0,I")))]
""
"{neg<msuffix>\t%0,%1|%w0 = -%w1}"
"{neg<msuffix>\t%0|%w0 = -%w1}"
[(set_attr "type" "<mtype>")])
;;; Multiplication

14
gcc/testsuite/gcc.target/bpf/neg-1.c Normal file
View file

@ -0,0 +1,14 @@
/* Check negr and negr32 instructions. */
/* { dg-do compile } */
/* { dg-options "-malu32" } */
long foo (long a, long b, int x, int y)
{
a = -b;
x = -y;
return a + x;
}
/* { dg-final { scan-assembler "neg\t%r.\n" } } */
/* { dg-final { scan-assembler "neg32\t%r.\n" } } */

14
gcc/testsuite/gcc.target/bpf/neg-pseudoc-1.c Normal file
View file

@ -0,0 +1,14 @@
/* Check negr and negr32 instructions (pseudoc asm dialect.) */
/* { dg-do compile } */
/* { dg-options "-malu32 -masm=pseudoc" } */
long foo (long a, long b, int x, int y)
{
a = -b;
x = -y;
return a + x;
}
/* { dg-final { scan-assembler {\t(r.) = -\1\n} } } */
/* { dg-final { scan-assembler {\t(w.) = -\1\n} } } */