Re: [Qemu-devel] [PATCH 9/9] tests/tcg/mips: Test R5900 multimedia instruction SQ

[Aleksandar Markovic]

> From: Fredrik Noring <address@hidden>
> Sent: Sunday, January 13, 2019 8:09 PM
> To: Aleksandar Markovic; Aurelien Jarno; Philippe Mathieu-Daudé
> Cc: Jürgen Urban; Maciej W. Rozycki; address@hidden
> Subject: [PATCH 9/9] tests/tcg/mips: Test R5900 multimedia instruction SQ
> 
> Signed-off-by: Fredrik Noring <address@hidden>
> ---

The commit message is missing. I will deal with the rest of this patch once LQ
implementation patch is accepted. Otherwise an interesting testing idea.


>  tests/tcg/mips/mipsn32r5900/Makefile |   1 +
>  tests/tcg/mips/mipsn32r5900/sq.c     | 105 +++++++++++++++++++++++++++
>  2 files changed, 106 insertions(+)
>  create mode 100644 tests/tcg/mips/mipsn32r5900/sq.c
> 
> diff --git a/tests/tcg/mips/mipsn32r5900/Makefile 
> b/tests/tcg/mips/mipsn32r5900/Makefile
> index cb3ef9d26a..a9e9481457 100644
> --- a/tests/tcg/mips/mipsn32r5900/Makefile
> +++ b/tests/tcg/mips/mipsn32r5900/Makefile
> @@ -10,6 +10,7 @@ CFLAGS  = -Wall -mabi=n32 -march=r5900 -static
> 
>  TESTCASES = lq.tst
>  TESTCASES += pcpyuld.tst
> +TESTCASES += sq.tst
> 
>  all: $(TESTCASES)
> 
> diff --git a/tests/tcg/mips/mipsn32r5900/sq.c 
> b/tests/tcg/mips/mipsn32r5900/sq.c
> new file mode 100644
> index 0000000000..97b21711ba
> --- /dev/null
> +++ b/tests/tcg/mips/mipsn32r5900/sq.c
> @@ -0,0 +1,105 @@
> +/*
> + * Test SQ.
> + */
> +
> +#include <stdio.h>
> +#include <string.h>
> +#include <inttypes.h>
> +#include <assert.h>
> +
> +#define GUARD_BYTE 0xA9
> +
> +/* 128-bit multimedia register */
> +struct mmr { uint64_t hi, lo; } __attribute__((aligned(16)));
> +
> +static uint8_t data[64];
> +
> +#define SQ(value, base, offset) \
> +        __asm__ __volatile__ ( \
> +            "    pcpyld  %0, %0, %1\n" \
> +            "    sq %0, %3(%2)\n" \
> +            : \
> +            : "r" (value.hi), "r" (value.lo), \
> +              "r" (base), "i" (offset))
> +
> +static void verify_sq(struct mmr value, const void *base, int16_t offset)
> +{
> +    /*
> +     * The least significant four bits of the effective address are
> +     * masked to zero, effectively creating an aligned address. No
> +     * address exceptions due to alignment are possible.
> +     */
> +    const uint8_t *b = base;
> +    const uint8_t *o = &b[offset];
> +    const uint8_t *a = (const uint8_t*)((unsigned long)o & ~0xFUL);
> +    size_t i;
> +
> +    for (i = 0; i < sizeof(data); i++) {
> +        ssize_t d = &data[i] - &a[0];
> +
> +        if (d < 0) {
> +            assert(data[i] == GUARD_BYTE);
> +        } else if (d < 8) {
> +            assert(data[i] == ((value.lo >> (8 * (d - 0))) & 0xFF));
> +        } else if (d < 16) {
> +            assert(data[i] == ((value.hi >> (8 * (d - 8))) & 0xFF));
> +        } else {
> +            assert(data[i] == GUARD_BYTE);
> +        }
> +    }
> +}
> +
> +#define VERIFY_SQ(base, offset) \
> +    do { \
> +        struct mmr value = { \
> +            .hi = 0x6665646362613938, \
> +            .lo = 0x3736353433323130 \
> +        }; \
> +    \
> +        memset(data, GUARD_BYTE, sizeof(data)); \
> +        SQ(value, base, offset); \
> +        verify_sq(value, base, offset); \
> +    } while (0)
> +
> +int main()
> +{
> +    int i;
> +
> +    for (i = 16; i < 48; i++) {
> +        VERIFY_SQ(&data[i], -16);
> +        VERIFY_SQ(&data[i], -15);
> +        VERIFY_SQ(&data[i], -14);
> +        VERIFY_SQ(&data[i], -13);
> +        VERIFY_SQ(&data[i], -12);
> +        VERIFY_SQ(&data[i], -11);
> +        VERIFY_SQ(&data[i], -10);
> +        VERIFY_SQ(&data[i], -9);
> +        VERIFY_SQ(&data[i], -8);
> +        VERIFY_SQ(&data[i], -7);
> +        VERIFY_SQ(&data[i], -6);
> +        VERIFY_SQ(&data[i], -5);
> +        VERIFY_SQ(&data[i], -4);
> +        VERIFY_SQ(&data[i], -3);
> +        VERIFY_SQ(&data[i], -2);
> +        VERIFY_SQ(&data[i], -1);
> +        VERIFY_SQ(&data[i],  0);
> +        VERIFY_SQ(&data[i],  1);
> +        VERIFY_SQ(&data[i],  2);
> +        VERIFY_SQ(&data[i],  3);
> +        VERIFY_SQ(&data[i],  4);
> +        VERIFY_SQ(&data[i],  5);
> +        VERIFY_SQ(&data[i],  6);
> +        VERIFY_SQ(&data[i],  7);
> +        VERIFY_SQ(&data[i],  8);
> +        VERIFY_SQ(&data[i],  9);
> +        VERIFY_SQ(&data[i],  10);
> +        VERIFY_SQ(&data[i],  11);
> +        VERIFY_SQ(&data[i],  12);
> +        VERIFY_SQ(&data[i],  13);
> +        VERIFY_SQ(&data[i],  14);
> +        VERIFY_SQ(&data[i],  15);
> +        VERIFY_SQ(&data[i],  16);
> +    }
> +
> +    return 0;
> +}
> --
> 2.19.2
> 
>