diff options
| -rw-r--r-- | target-mips/dsp_helper.c | 30 | ||||
| -rw-r--r-- | tests/tcg/mips/mips32-dsp/shll_ph.c | 33 | ||||
| -rw-r--r-- | tests/tcg/mips/mips32-dsp/shll_qb.c | 23 |
3 files changed, 59 insertions, 27 deletions
diff --git a/target-mips/dsp_helper.c b/target-mips/dsp_helper.c index f975da0..805247d 100644 --- a/target-mips/dsp_helper.c +++ b/target-mips/dsp_helper.c @@ -682,49 +682,31 @@ static inline uint8_t mipsdsp_sat8_reduce_precision(uint16_t a, static inline uint8_t mipsdsp_lshift8(uint8_t a, uint8_t s, CPUMIPSState *env) { - uint8_t sign; uint8_t discard; - if (s == 0) { - return a; - } else { - sign = (a >> 7) & 0x01; - if (sign != 0) { - discard = (((0x01 << (8 - s)) - 1) << s) | - ((a >> (6 - (s - 1))) & ((0x01 << s) - 1)); - } else { - discard = a >> (6 - (s - 1)); - } + if (s != 0) { + discard = a >> (8 - s); if (discard != 0x00) { set_DSPControl_overflow_flag(1, 22, env); } - return a << s; } + return a << s; } static inline uint16_t mipsdsp_lshift16(uint16_t a, uint8_t s, CPUMIPSState *env) { - uint8_t sign; uint16_t discard; - if (s == 0) { - return a; - } else { - sign = (a >> 15) & 0x01; - if (sign != 0) { - discard = (((0x01 << (16 - s)) - 1) << s) | - ((a >> (14 - (s - 1))) & ((0x01 << s) - 1)); - } else { - discard = a >> (14 - (s - 1)); - } + if (s != 0) { + discard = (int16_t)a >> (15 - s); if ((discard != 0x0000) && (discard != 0xFFFF)) { set_DSPControl_overflow_flag(1, 22, env); } - return a << s; } + return a << s; } diff --git a/tests/tcg/mips/mips32-dsp/shll_ph.c b/tests/tcg/mips/mips32-dsp/shll_ph.c index b8f1ff5..5fa58cc 100644 --- a/tests/tcg/mips/mips32-dsp/shll_ph.c +++ b/tests/tcg/mips/mips32-dsp/shll_ph.c @@ -11,7 +11,38 @@ int main() resultdsp = 1; __asm - ("shll.ph %0, %2, 0x0B\n\t" + ("wrdsp $0\n\t" + "shll.ph %0, %2, 0x0B\n\t" + "rddsp %1\n\t" + : "=r"(rd), "=r"(dsp) + : "r"(rt) + ); + dsp = (dsp >> 22) & 0x01; + assert(dsp == resultdsp); + assert(rd == result); + + rt = 0x7fff8000; + result = 0xfffe0000; + resultdsp = 1; + + __asm + ("wrdsp $0\n\t" + "shll.ph %0, %2, 0x01\n\t" + "rddsp %1\n\t" + : "=r"(rd), "=r"(dsp) + : "r"(rt) + ); + dsp = (dsp >> 22) & 0x01; + assert(dsp == resultdsp); + assert(rd == result); + + rt = 0x00000001; + result = 0x00008000; + resultdsp = 1; + + __asm + ("wrdsp $0\n\t" + "shll.ph %0, %2, 0x0F\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rt) diff --git a/tests/tcg/mips/mips32-dsp/shll_qb.c b/tests/tcg/mips/mips32-dsp/shll_qb.c index 8c1b91c..729716d 100644 --- a/tests/tcg/mips/mips32-dsp/shll_qb.c +++ b/tests/tcg/mips/mips32-dsp/shll_qb.c @@ -11,12 +11,14 @@ int main() resultdsp = 0x00; __asm - ("shll.qb %0, %2, 0x00\n\t" + ("wrdsp $0\n\t" + "shll.qb %0, %2, 0x00\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rt) ); dsp = (dsp >> 22) & 0x01; + assert(dsp == resultdsp); assert(rd == result); rt = 0x87654321; @@ -24,12 +26,29 @@ int main() resultdsp = 0x01; __asm - ("shll.qb %0, %2, 0x03\n\t" + ("wrdsp $0\n\t" + "shll.qb %0, %2, 0x03\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rt) ); dsp = (dsp >> 22) & 0x01; + assert(dsp == resultdsp); + assert(rd == result); + + rt = 0x00000001; + result = 0x00000080; + resultdsp = 0x00; + + __asm + ("wrdsp $0\n\t" + "shll.qb %0, %2, 0x07\n\t" + "rddsp %1\n\t" + : "=r"(rd), "=r"(dsp) + : "r"(rt) + ); + dsp = (dsp >> 22) & 0x01; + assert(dsp == resultdsp); assert(rd == result); return 0; |