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# Support macros for the assembly test cases.

        .macro start

        .text

        .global start

start:

        .endm

        # Perform a single to double precision floating point conversion.

        .macro _s2d fpr dpr

        flds \fpr, fpul

        _setpr

        fcnvsd fpul, \dpr

        _clrpr

        .endm

        # Set the PR (PRecision) bit in the FPSCR.

        .macro _setpr

        sts fpscr, r7

        mov #8, r8

        shll16 r8

        or r8, r7

        lds r7, fpscr

        .endm

        # Clear the PR bit.

        .macro _clrpr

        sts fpscr, r7

        mov #8, r8

        shll16 r8

        not r8, r8

        and r8, r7

        lds r7, fpscr

        .endm

        # nb: this macro clobbers R7.

        .macro assert reg value

        mov \value, r7

        cmp/eq \reg, r7

        bf wrong

        .endm

        .macro pass

        trapa #253

        .endm

        .macro fail

        trapa #254

        .endm