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authorGabe Black <gblack@eecs.umich.edu>2010-06-02 12:58:14 -0500
committerGabe Black <gblack@eecs.umich.edu>2010-06-02 12:58:14 -0500
commit3111a6216924643c332cd8ae3ebdd66fcbbf2c0f (patch)
tree9b98dfd984995528df736a6444bce71bb6f6045f /src
parent90d70a22cb15e6461fc7397a0f55322dc163f701 (diff)
downloadgem5-3111a6216924643c332cd8ae3ebdd66fcbbf2c0f.tar.xz
ARM: Implement the VFP versions of VMLA and VMLS.
Diffstat (limited to 'src')
-rw-r--r--src/arch/arm/isa/formats/fp.isa42
-rw-r--r--src/arch/arm/isa/insts/fp.isa70
2 files changed, 111 insertions, 1 deletions
diff --git a/src/arch/arm/isa/formats/fp.isa b/src/arch/arm/isa/formats/fp.isa
index 2cca96bea..9bb062a2e 100644
--- a/src/arch/arm/isa/formats/fp.isa
+++ b/src/arch/arm/isa/formats/fp.isa
@@ -483,7 +483,47 @@ let {{
//const uint32_t opc4 = bits(machInst, 3, 0);
switch (opc1 & 0xb /* 1011 */) {
case 0x0:
- return new WarnUnimplemented("vmla, vmls", machInst);
+ if (bits(machInst, 6) == 0) {
+ uint32_t vd;
+ uint32_t vm;
+ uint32_t vn;
+ if (bits(machInst, 8) == 0) {
+ vd = bits(machInst, 22) | (bits(machInst, 15, 12) << 1);
+ vm = bits(machInst, 5) | (bits(machInst, 3, 0) << 1);
+ vn = bits(machInst, 7) | (bits(machInst, 19, 16) << 1);
+ return new VmlaS(machInst, (IntRegIndex)vd,
+ (IntRegIndex)vn, (IntRegIndex)vm);
+ } else {
+ vd = (bits(machInst, 22) << 5) |
+ (bits(machInst, 15, 12) << 1);
+ vm = (bits(machInst, 5) << 5) |
+ (bits(machInst, 3, 0) << 1);
+ vn = (bits(machInst, 7) << 5) |
+ (bits(machInst, 19, 16) << 1);
+ return new VmlaD(machInst, (IntRegIndex)vd,
+ (IntRegIndex)vn, (IntRegIndex)vm);
+ }
+ } else {
+ uint32_t vd;
+ uint32_t vm;
+ uint32_t vn;
+ if (bits(machInst, 8) == 0) {
+ vd = bits(machInst, 22) | (bits(machInst, 15, 12) << 1);
+ vm = bits(machInst, 5) | (bits(machInst, 3, 0) << 1);
+ vn = bits(machInst, 7) | (bits(machInst, 19, 16) << 1);
+ return new VmlsS(machInst, (IntRegIndex)vd,
+ (IntRegIndex)vn, (IntRegIndex)vm);
+ } else {
+ vd = (bits(machInst, 22) << 5) |
+ (bits(machInst, 15, 12) << 1);
+ vm = (bits(machInst, 5) << 5) |
+ (bits(machInst, 3, 0) << 1);
+ vn = (bits(machInst, 7) << 5) |
+ (bits(machInst, 19, 16) << 1);
+ return new VmlsD(machInst, (IntRegIndex)vd,
+ (IntRegIndex)vn, (IntRegIndex)vm);
+ }
+ }
case 0x2:
if ((opc3 & 0x1) == 0) {
uint32_t vd;
diff --git a/src/arch/arm/isa/insts/fp.isa b/src/arch/arm/isa/insts/fp.isa
index 99efcec32..58c2cafa7 100644
--- a/src/arch/arm/isa/insts/fp.isa
+++ b/src/arch/arm/isa/insts/fp.isa
@@ -411,4 +411,74 @@ let {{
header_output += RegRegOpDeclare.subst(vsqrtDIop);
decoder_output += RegRegOpConstructor.subst(vsqrtDIop);
exec_output += PredOpExecute.subst(vsqrtDIop);
+
+ vmlaSCode = '''
+ float mid = FpOp1 * FpOp2;
+ if ((isinf(FpOp1) && FpOp2 == 0) || (isinf(FpOp2) && FpOp1 == 0)) {
+ mid = NAN;
+ }
+ FpDest = FpDest + mid;
+ '''
+ vmlaSIop = InstObjParams("vmlas", "VmlaS", "RegRegRegOp",
+ { "code": vmlaSCode,
+ "predicate_test": predicateTest }, [])
+ header_output += RegRegRegOpDeclare.subst(vmlaSIop);
+ decoder_output += RegRegRegOpConstructor.subst(vmlaSIop);
+ exec_output += PredOpExecute.subst(vmlaSIop);
+
+ vmlaDCode = '''
+ IntDoubleUnion cOp1, cOp2, cDest;
+ cOp1.bits = ((uint64_t)FpOp1P0.uw | ((uint64_t)FpOp1P1.uw << 32));
+ cOp2.bits = ((uint64_t)FpOp2P0.uw | ((uint64_t)FpOp2P1.uw << 32));
+ cDest.bits = ((uint64_t)FpDestP0.uw | ((uint64_t)FpDestP1.uw << 32));
+ double mid = cOp1.fp * cOp2.fp;
+ if ((isinf(cOp1.fp) && cOp2.fp == 0) ||
+ (isinf(cOp2.fp) && cOp1.fp == 0)) {
+ mid = NAN;
+ }
+ cDest.fp = cDest.fp + mid;
+ FpDestP0.uw = cDest.bits;
+ FpDestP1.uw = cDest.bits >> 32;
+ '''
+ vmlaDIop = InstObjParams("vmlad", "VmlaD", "RegRegRegOp",
+ { "code": vmlaDCode,
+ "predicate_test": predicateTest }, [])
+ header_output += RegRegRegOpDeclare.subst(vmlaDIop);
+ decoder_output += RegRegRegOpConstructor.subst(vmlaDIop);
+ exec_output += PredOpExecute.subst(vmlaDIop);
+
+ vmlsSCode = '''
+ float mid = FpOp1 * FpOp2;
+ if ((isinf(FpOp1) && FpOp2 == 0) || (isinf(FpOp2) && FpOp1 == 0)) {
+ mid = NAN;
+ }
+ FpDest = FpDest - mid;
+ '''
+ vmlsSIop = InstObjParams("vmlss", "VmlsS", "RegRegRegOp",
+ { "code": vmlsSCode,
+ "predicate_test": predicateTest }, [])
+ header_output += RegRegRegOpDeclare.subst(vmlsSIop);
+ decoder_output += RegRegRegOpConstructor.subst(vmlsSIop);
+ exec_output += PredOpExecute.subst(vmlsSIop);
+
+ vmlsDCode = '''
+ IntDoubleUnion cOp1, cOp2, cDest;
+ cOp1.bits = ((uint64_t)FpOp1P0.uw | ((uint64_t)FpOp1P1.uw << 32));
+ cOp2.bits = ((uint64_t)FpOp2P0.uw | ((uint64_t)FpOp2P1.uw << 32));
+ cDest.bits = ((uint64_t)FpDestP0.uw | ((uint64_t)FpDestP1.uw << 32));
+ double mid = cOp1.fp * cOp2.fp;
+ if ((isinf(cOp1.fp) && cOp2.fp == 0) ||
+ (isinf(cOp2.fp) && cOp1.fp == 0)) {
+ mid = NAN;
+ }
+ cDest.fp = cDest.fp - mid;
+ FpDestP0.uw = cDest.bits;
+ FpDestP1.uw = cDest.bits >> 32;
+ '''
+ vmlsDIop = InstObjParams("vmlsd", "VmlsD", "RegRegRegOp",
+ { "code": vmlsDCode,
+ "predicate_test": predicateTest }, [])
+ header_output += RegRegRegOpDeclare.subst(vmlsDIop);
+ decoder_output += RegRegRegOpConstructor.subst(vmlsDIop);
+ exec_output += PredOpExecute.subst(vmlsDIop);
}};