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authorGabe Black <gblack@eecs.umich.edu>2007-04-11 12:25:00 +0000
committerGabe Black <gblack@eecs.umich.edu>2007-04-11 12:25:00 +0000
commite72f1e63f0b17ab3701d955235a478d7b34a13fb (patch)
treefc04344a514b7d446537ce753c2bf9be7c8e1f3e /src/arch/sparc/isa/base.isa
parentf71a6c8fed86c62d309908f37311456e8ec7a588 (diff)
downloadgem5-e72f1e63f0b17ab3701d955235a478d7b34a13fb.tar.xz
Create a filter and a union to translate the SPARC instruction implementations from using doubles to using concatenated singles.
--HG-- extra : convert_revision : 609ba35bbb13cbd1998e93957cb051461442d1f9
Diffstat (limited to 'src/arch/sparc/isa/base.isa')
-rw-r--r--src/arch/sparc/isa/base.isa70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/arch/sparc/isa/base.isa b/src/arch/sparc/isa/base.isa
index bba63f407..4339003e0 100644
--- a/src/arch/sparc/isa/base.isa
+++ b/src/arch/sparc/isa/base.isa
@@ -154,6 +154,76 @@ def template ROrImmDecode {{
}
}};
+output header {{
+ union DoubleSingle
+ {
+ double d;
+ uint64_t ui;
+ uint32_t s[2];
+ DoubleSingle(double _d) : d(_d)
+ {}
+ DoubleSingle(uint64_t _ui) : ui(_ui)
+ {}
+ DoubleSingle(uint32_t _s0, uint32_t _s1)
+ {
+ s[0] = _s0;
+ s[1] = _s1;
+ }
+ };
+}};
+
+let {{
+ def filterDoubles(code):
+ assignRE = re.compile(r'\s*=(?!=)', re.MULTILINE)
+ for opName in ("Frd", "Frs1", "Frs2", "Frd_N"):
+ next_pos = 0
+ operandsREString = (r'''
+ (?<![\w\.]) # neg. lookbehind assertion: prevent partial matches
+ ((%s)(?:\.(\w+))?) # match: operand with optional '.' then suffix
+ (?![\w\.]) # neg. lookahead assertion: prevent partial matches
+ ''' % opName)
+ operandsRE = re.compile(operandsREString, re.MULTILINE|re.VERBOSE)
+ is_src = False
+ is_dest = False
+ extension = None
+ foundOne = False
+ while 1:
+ match = operandsRE.search(code, next_pos)
+ if not match:
+ break
+ foundOne = True
+ op = match.groups()
+ (op_full, op_base, op_ext) = op
+ is_dest_local = (assignRE.match(code, match.end()) != None)
+ is_dest = is_dest or is_dest_local
+ is_src = is_src or not is_dest_local
+ if extension and extension != op_ext:
+ raise Exception, "Inconsistent extensions in double filter."
+ extension = op_ext
+ next_pos = match.end()
+ if foundOne:
+ # Get rid of any unwanted extension
+ code = operandsRE.sub(op_base, code)
+ is_int = False
+ member = "d"
+ if extension in ("sb", "ub", "shw", "uhw", "sw", "uw", "sdw", "udw"):
+ is_int = True
+ member = "ui"
+ if is_src:
+ code = ("%s = DoubleSingle(%s_high, %s_low).%s;" % \
+ (opName, opName, opName, member)) + code
+ if is_dest:
+ code += '''
+ %s_low = DoubleSingle(%s).s[1];
+ %s_high = DoubleSingle(%s).s[0];''' % \
+ (opName, opName, opName, opName)
+ if is_int:
+ code = ("uint64_t %s;" % opName) + code
+ else:
+ code = ("double %s;" % opName) + code
+ return code
+}};
+
let {{
def splitOutImm(code):
matcher = re.compile(r'Rs(?P<rNum>\d)_or_imm(?P<iNum>\d+)(?P<typeQual>\.\w+)?')