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cmd/compile: add 32 bit float registers/variables on wasm

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Before this change, wasm only used float variables with a size of 64 bit
and applied rounding to 32 bit precision where necessary. This change
adds proper 32 bit float variables.

Reduces the size of pkg/js_wasm by 254 bytes.

Change-Id: Ieabe846a8cb283d66def3cdf11e2523b3b31f345
Reviewed-on: https://go-review.googlesource.com/c/go/+/195117
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Richard Musiol 2019-09-12 21:05:45 +02:00 • committed by Richard Musiol
parent d6c2f1e90e
commit 1c50fcf853
10 changed files with 802 additions and 375 deletions
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4
src/cmd/compile/internal/ssa/config.go
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@ -25,6 +25,8 @@ type Config struct {
registers []Register // machine registers
gpRegMask regMask // general purpose integer register mask
fpRegMask regMask // floating point register mask
fp32RegMask regMask // floating point register mask
fp64RegMask regMask // floating point register mask
specialRegMask regMask // special register mask
GCRegMap []*Register // garbage collector register map, by GC register index
FPReg int8 // register number of frame pointer, -1 if not used
@ -324,6 +326,8 @@ func NewConfig(arch string, types Types, ctxt *obj.Link, optimize bool) *Config
c.registers = registersWasm[:]
c.gpRegMask = gpRegMaskWasm
c.fpRegMask = fpRegMaskWasm
c.fp32RegMask = fp32RegMaskWasm
c.fp64RegMask = fp64RegMaskWasm
c.FPReg = framepointerRegWasm
c.LinkReg = linkRegWasm
c.hasGReg = true