From 8f6744c19c7d6cf87a207e901503c3435c1ff7a9 Mon Sep 17 00:00:00 2001 From: Vince Weaver Date: Wed, 11 Nov 2009 17:49:09 -0500 Subject: [PATCH] X86: add ULL to 1's being shifted in 64-bit values Some of the micro-ops weren't casting 1 to ULL before shifting, which can cause problems. On the perl makerand input this caused some values to be negative that shouldn't have been. The casts are done as ULL(1) instead of 1ULL to match others in the m5 code base. --- src/arch/x86/isa/microops/mediaop.isa | 31 ++++++++++++++------------- src/arch/x86/isa/microops/regop.isa | 4 ++-- 2 files changed, 18 insertions(+), 17 deletions(-) diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa index fa32583b0..4052f254d 100644 --- a/src/arch/x86/isa/microops/mediaop.isa +++ b/src/arch/x86/isa/microops/mediaop.isa @@ -452,7 +452,7 @@ let {{ if (signBit) { if (overflow != mask(destBits - srcBits + 1)) { if (ext & 0x1) - picked = (1 << (destBits - 1)); + picked = (ULL(1) << (destBits - 1)); else picked = 0; } @@ -480,7 +480,7 @@ let {{ if (signBit) { if (overflow != mask(destBits - srcBits + 1)) { if (ext & 0x1) - picked = (1 << (destBits - 1)); + picked = (ULL(1) << (destBits - 1)); else picked = 0; } @@ -642,10 +642,10 @@ let {{ int loIndex = (i + 0) * sizeBits; uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex); int64_t arg1 = arg1Bits | - (0 - (arg1Bits & (1 << (sizeBits - 1)))); + (0 - (arg1Bits & (ULL(1) << (sizeBits - 1)))); uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex); int64_t arg2 = arg2Bits | - (0 - (arg2Bits & (1 << (sizeBits - 1)))); + (0 - (arg2Bits & (ULL(1) << (sizeBits - 1)))); uint64_t resBits; if (ext & 0x2) { @@ -680,10 +680,10 @@ let {{ int loIndex = (i + 0) * sizeBits; uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex); int64_t arg1 = arg1Bits | - (0 - (arg1Bits & (1 << (sizeBits - 1)))); + (0 - (arg1Bits & (ULL(1) << (sizeBits - 1)))); uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex); int64_t arg2 = arg2Bits | - (0 - (arg2Bits & (1 << (sizeBits - 1)))); + (0 - (arg2Bits & (ULL(1) << (sizeBits - 1)))); uint64_t resBits; if (ext & 0x2) { @@ -957,7 +957,7 @@ let {{ int resSign = bits(resBits, sizeBits - 1); if ((arg1Sign == arg2Sign) && (arg1Sign != resSign)) { if (resSign == 0) - resBits = (1 << (sizeBits - 1)); + resBits = (ULL(1) << (sizeBits - 1)); else resBits = mask(sizeBits - 1); } @@ -996,7 +996,7 @@ let {{ int resSign = bits(resBits, sizeBits - 1); if ((arg1Sign == arg2Sign) && (arg1Sign != resSign)) { if (resSign == 0) - resBits = (1 << (sizeBits - 1)); + resBits = (ULL(1) << (sizeBits - 1)); else resBits = mask(sizeBits - 1); } @@ -1032,16 +1032,16 @@ let {{ if (ext & 0x2) { int64_t arg1 = arg1Bits | - (0 - (arg1Bits & (1 << (srcBits - 1)))); + (0 - (arg1Bits & (ULL(1) << (srcBits - 1)))); int64_t arg2 = arg2Bits | - (0 - (arg2Bits & (1 << (srcBits - 1)))); + (0 - (arg2Bits & (ULL(1) << (srcBits - 1)))); resBits = (uint64_t)(arg1 * arg2); } else { resBits = arg1Bits * arg2Bits; } if (ext & 0x4) - resBits += (1 << (destBits - 1)); + resBits += (ULL(1) << (destBits - 1)); if (ext & 0x8) resBits >>= destBits; @@ -1142,7 +1142,7 @@ let {{ } else { resBits = (arg1Bits >> shiftAmt); resBits = resBits | - (0 - (resBits & (1 << (sizeBits - 1 - shiftAmt)))); + (0 - (resBits & (ULL(1) << (sizeBits - 1 - shiftAmt)))); } result = insertBits(result, hiIndex, loIndex, resBits); @@ -1289,7 +1289,8 @@ let {{ int srcHiIndex = srcStart + (i + 1) * srcSizeBits - 1; int srcLoIndex = srcStart + (i + 0) * srcSizeBits; uint64_t argBits = bits(FpSrcReg1.uqw, srcHiIndex, srcLoIndex); - int64_t sArg = argBits | (0 - (argBits & (1 << srcHiIndex))); + + int64_t sArg = argBits | (0 - (argBits & (ULL(1) << srcHiIndex))); double arg = sArg; if (destSize == 4) { @@ -1400,10 +1401,10 @@ let {{ int loIndex = (i + 0) * sizeBits; uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex); int64_t arg1 = arg1Bits | - (0 - (arg1Bits & (1 << (sizeBits - 1)))); + (0 - (arg1Bits & (ULL(1) << (sizeBits - 1)))); uint64_t arg2Bits = bits(FpSrcReg2.uqw, hiIndex, loIndex); int64_t arg2 = arg2Bits | - (0 - (arg2Bits & (1 << (sizeBits - 1)))); + (0 - (arg2Bits & (ULL(1) << (sizeBits - 1)))); uint64_t resBits = 0; if (((ext & 0x2) == 0 && arg1 == arg2) || diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index fd1ad6925..0b1f9a96a 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -525,7 +525,7 @@ let {{ code = ''' ProdLow = psrc1 * op2; int halfSize = (dataSize * 8) / 2; - uint64_t shifter = (1ULL << halfSize); + uint64_t shifter = (ULL(1) << halfSize); uint64_t hiResult; uint64_t psrc1_h = psrc1 / shifter; uint64_t psrc1_l = psrc1 & mask(halfSize); @@ -553,7 +553,7 @@ let {{ code = ''' ProdLow = psrc1 * op2; int halfSize = (dataSize * 8) / 2; - uint64_t shifter = (1ULL << halfSize); + uint64_t shifter = (ULL(1) << halfSize); uint64_t psrc1_h = psrc1 / shifter; uint64_t psrc1_l = psrc1 & mask(halfSize); uint64_t psrc2_h = (op2 / shifter) & mask(halfSize); -- 2.30.2