Sandipan Das has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/16616
Change subject: arch-power: Add fixed-point word arithmetic modulo
instructions
......................................................................
arch-power: Add fixed-point word arithmetic modulo instructions
This adds the following arithmetic instructions:
* Modulo Signed Word (modsw)
* Modulo Unsigned Word (moduw)
Change-Id: I5590e569afb71dd429c473bd18c65457e2c49286
Signed-off-by: Sandipan Das <[email protected]>
---
M src/arch/power/isa/decoder.isa
M src/arch/power/isa/formats/integer.isa
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/src/arch/power/isa/decoder.isa b/src/arch/power/isa/decoder.isa
index 8c46ac2..7241130 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -380,6 +380,28 @@
181: stdux({{ Mem = Rs; }});
}
+ format IntArithOp {
+ 779: modsw({{
+ int64_t src1 = Ra_sw;
+ int64_t src2 = Rb_sw;
+ if ((src1 != INT32_MIN || src2 != -1) && src2 != 0) {
+ Rt = src1 % src2;
+ } else {
+ Rt = 0;
+ }
+ }});
+
+ 267: moduw({{
+ uint64_t src1 = Ra_uw;
+ uint64_t src2 = Rb_uw;
+ if (src2 != 0) {
+ Rt = src1 % src2;
+ } else {
+ Rt = 0;
+ }
+ }});
+ }
+
format IntOp {
0: cmp({{
Xer xer = XER;
diff --git a/src/arch/power/isa/formats/integer.isa
b/src/arch/power/isa/formats/integer.isa
index b4ec74f..9bbd65e 100644
--- a/src/arch/power/isa/formats/integer.isa
+++ b/src/arch/power/isa/formats/integer.isa
@@ -325,6 +325,17 @@
// Instructions that use source registers Ra and Rb, with the result
+// placed into Rt but do not check for carry, overflow or the Rc bit.
+def format IntArithOp(code, inst_flags = []) {{
+
+ # Generate the class
+ (header_output, decoder_output, decode_block, exec_output) = \
+ GenAluOp(name, Name, 'IntArithOp', code, inst_flags, BasicDecode,
+ BasicConstructor)
+}};
+
+
+// Instructions that use source registers Ra and Rb, with the result
// placed into Rt. Basically multiply and divide instructions. The
// carry bit is never set, but overflow can be calculated. In certain
// situations, the overflow bits have to be set and this is dealt with
--
To view, visit https://gem5-review.googlesource.com/c/public/gem5/+/16616
To unsubscribe, or for help writing mail filters, visit
https://gem5-review.googlesource.com/settings
Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I5590e569afb71dd429c473bd18c65457e2c49286
Gerrit-Change-Number: 16616
Gerrit-PatchSet: 1
Gerrit-Owner: Sandipan Das <[email protected]>
Gerrit-MessageType: newchange
_______________________________________________
gem5-dev mailing list
[email protected]
http://m5sim.org/mailman/listinfo/gem5-dev
