Not sure how this happend, but: svsudot is supposed to be expanded
as USDOT with the operands swapped. However, a thinko in the
expansion of svsudot meant that the arguments weren't in fact
swapped; the attempted swap was just a no-op. And the testcases
blithely accepted that.
Tested on aarch64-linux-gnu and pushed to trunk. I'll backport
in a few weeks if there's no fallout.
Richard
gcc/
PR target/114607
* config/aarch64/aarch64-sve-builtins-base.cc
(svusdot_impl::expand): Fix botched attempt to swap the operands
for svsudot.
gcc/testsuite/
PR target/114607
* gcc.target/aarch64/sve/acle/asm/sudot_s32.c: New test.
---
gcc/config/aarch64/aarch64-sve-builtins-base.cc | 2 +-
gcc/testsuite/gcc.target/aarch64/sve/acle/asm/sudot_s32.c | 8 ++++----
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/gcc/config/aarch64/aarch64-sve-builtins-base.cc
b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
index 5be2315a3c6..0d2edf3f19e 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins-base.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
@@ -2809,7 +2809,7 @@ public:
version) is through the USDOT instruction but with the second and third
inputs swapped. */
if (m_su)
- e.rotate_inputs_left (1, 2);
+ e.rotate_inputs_left (1, 3);
/* The ACLE function has the same order requirements as for svdot.
While there's no requirement for the RTL pattern to have the same sort
of order as that for <sur>dot_prod, it's easier to read.
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/sudot_s32.c
b/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/sudot_s32.c
index 4b452619eee..e06b69affab 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/sudot_s32.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/sudot_s32.c
@@ -6,7 +6,7 @@
/*
** sudot_s32_tied1:
-** usdot z0\.s, z2\.b, z4\.b
+** usdot z0\.s, z4\.b, z2\.b
** ret
*/
TEST_TRIPLE_Z (sudot_s32_tied1, svint32_t, svint8_t, svuint8_t,
@@ -17,7 +17,7 @@ TEST_TRIPLE_Z (sudot_s32_tied1, svint32_t, svint8_t,
svuint8_t,
** sudot_s32_tied2:
** mov (z[0-9]+)\.d, z0\.d
** movprfx z0, z4
-** usdot z0\.s, z2\.b, \1\.b
+** usdot z0\.s, \1\.b, z2\.b
** ret
*/
TEST_TRIPLE_Z_REV (sudot_s32_tied2, svint32_t, svint8_t, svuint8_t,
@@ -27,7 +27,7 @@ TEST_TRIPLE_Z_REV (sudot_s32_tied2, svint32_t, svint8_t,
svuint8_t,
/*
** sudot_w0_s32_tied:
** mov (z[0-9]+\.b), w0
-** usdot z0\.s, z2\.b, \1
+** usdot z0\.s, \1, z2\.b
** ret
*/
TEST_TRIPLE_ZX (sudot_w0_s32_tied, svint32_t, svint8_t, uint8_t,
@@ -37,7 +37,7 @@ TEST_TRIPLE_ZX (sudot_w0_s32_tied, svint32_t, svint8_t,
uint8_t,
/*
** sudot_9_s32_tied:
** mov (z[0-9]+\.b), #9
-** usdot z0\.s, z2\.b, \1
+** usdot z0\.s, \1, z2\.b
** ret
*/
TEST_TRIPLE_Z (sudot_9_s32_tied, svint32_t, svint8_t, uint8_t,
--
2.25.1
