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tests/tcg/arm: Tests for new FPRCVT instructions

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We autodetect the presence of FPRCVT in the test cross compiler,
which is a recent feature in GCC and not supported by many distros
yet. If this is in place, we compile the existing fcvt.c test with
an extra compiler flag which uses the new SIMD instructions; the
output from the test is unchanged.

The existing [US]CVTF instructions do not have a test, so no new
tests are added for the SIMD versions. They have been tested manually
to check the new SIMD versions produce the same numerical results as
the existing versions.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Jim MacArthur <jim.macarthur@linaro.org>
Message-id: 20260630-jmac-fprcvt-v3-6-f4840d5e0a7f@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jim MacArthur
2026-06-30 14:16:37 +01:00
committed by Peter Maydell
parent 81555a662b
commit 97af096c69
2 changed files with 20 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
tests/tcg/aarch64/Makefile.target
View File

@@ -28,9 +28,21 @@ config-cc.mak: Makefile
$(call cc-option,-march=armv8.5-a, CROSS_CC_HAS_ARMV8_5); \
$(call cc-option,-mbranch-protection=standard, CROSS_CC_HAS_ARMV8_BTI); \
$(call cc-option,-march=armv8.5-a+memtag, CROSS_CC_HAS_ARMV8_MTE); \
$(call cc-option,-Wa$(COMMA)-march=armv9-a+sme $$fnia, CROSS_AS_HAS_ARMV9_SME)) 3> config-cc.mak
$(call cc-option,-Wa$(COMMA)-march=armv9-a+sme $$fnia, CROSS_AS_HAS_ARMV9_SME); \
$(call cc-option,-march=armv9-a+fprcvt, CROSS_CC_HAS_ARMV9_FPRCVT)) 3> config-cc.mak
-include config-cc.mak
ifneq ($(CROSS_CC_HAS_ARMV9_FPRCVT),)
AARCH64_TESTS += fcvt-fprcvt
fcvt-fprcvt: LDFLAGS += -lm
fcvt-fprcvt: CFLAGS += $(CROSS_CC_HAS_ARMV9_FPRCVT) -DFPRCVT
fcvt-fprcvt: fcvt.c
$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS)
run-fcvt-fprcvt: fcvt-fprcvt
$(call run-test,$<,$(QEMU) $<)
$(call diff-out,$<,$(AARCH64_SRC)/fcvt.ref)
endif
ifneq ($(CROSS_CC_HAS_ARMV8_2),)
AARCH64_TESTS += dcpop
dcpop: CFLAGS += $(CROSS_CC_HAS_ARMV8_2)

7
tests/tcg/arm/fcvt.c
View File

@@ -171,8 +171,14 @@ static void convert_single_to_integer(void)
#if defined(__arm__)
/* asm("vcvt.s32.f32 %s0, %s1" : "=t" (output) : "t" (input)); */
output = input;
#else
#ifdef FPRCVT
asm("fcvtzs d0, %s1\r\n"
"fmov %0, d0" :
"=r" (output) : "w" (input));
#else
asm("fcvtzs %0, %s1" : "=r" (output) : "w" (input));
#endif
#endif
print_int64(i, output);
}
@@ -425,6 +431,7 @@ int main(int argc, char *argv[argc])
convert_double_to_integer();
convert_half_to_integer();
/* And now with ARM alternative FP16 */
#if defined(__arm__)
asm("vmrs r1, fpscr\n\t"