From 2ce0274303000c95f5f503f1fb0db86fd108b06e Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Mon, 29 Oct 2007 20:20:12 -0700
Subject: Use a 32-bit floating-point limb size; support 8-bit float

Use a 32-bit limb size ("like a digit, but bigger") for floating-point
conversion.  This cuts the number of multiplications per constant by a
factor of four.

This means supporting fractional-limb-sized numbers, so while we're at
it, add support for 8-bit floating point numbers (apparently used in
graphics and in audio compression applications.)
---
 test/float.asm    | 37 ++++++++++++++++++++++++++++++++++++-
 test/floatexp.asm | 26 ++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/float.asm b/test/float.asm
index 759b61c3..df2d96c0 100644
--- a/test/float.asm
+++ b/test/float.asm
@@ -2,6 +2,36 @@
 ; Test of floating-point formats
 ;
 
+; 8-bit
+	db 1.0
+	db +1.0
+	db -1.0
+	db 1.5
+	db +1.5
+	db -1.5
+	db 0.0
+	db +0.0
+	db -0.0
+	db 1.83203125
+	db +1.83203125
+	db -1.83203125
+	db 1.83203125e1
+	db +1.83203125e1
+	db -1.83203125e1
+	db 1.83203125e-1
+	db +1.83203125e-1
+	db -1.83203125e-1
+	db 1.13203125e-2		; Denormal!
+	db +1.13203125e-2		; Denormal!
+	db -1.13203125e-2		; Denormal!
+	db __Infinity__
+	db +__Infinity__
+	db -__Infinity__
+	db __NaN__
+	db __QNaN__
+	db __SNaN__
+	db 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
+
 ; 16-bit
 	dw 1.0
 	dw +1.0
@@ -30,6 +60,7 @@
 	dw __NaN__
 	dw __QNaN__
 	dw __SNaN__
+	dw 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
 
 ; 32-bit
 	dd 1.0
@@ -59,6 +90,7 @@
 	dd __NaN__
 	dd __QNaN__
 	dd __SNaN__
+	dd 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
 
 ; 64-bit
 	dq 1.0
@@ -88,7 +120,8 @@
 	dq __NaN__
 	dq __QNaN__
 	dq __SNaN__
-
+	dq 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
+	
 ; 80-bit
 	dt 1.0
 	dt +1.0
@@ -117,6 +150,7 @@
 	dt __NaN__
 	dt __QNaN__
 	dt __SNaN__
+	dt 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
 
 ; 128-bit
 	do 1.0
@@ -146,3 +180,4 @@
 	do __NaN__
 	do __QNaN__
 	do __SNaN__
+	do 3.1415926535_8979323846_2643383279_5028841971_6939937510_5
diff --git a/test/floatexp.asm b/test/floatexp.asm
index 7e6a01c3..b3d14f76 100644
--- a/test/floatexp.asm
+++ b/test/floatexp.asm
@@ -3,6 +3,32 @@
 ; Test of floating-point formats
 ;
 
+; 8-bit
+	mov al,__float8__(1.0)
+	mov al,__float8__(+1.0)
+	mov al,__float8__(-1.0)
+	mov al,__float8__(0.0)
+	mov al,__float8__(+0.0)
+	mov al,__float8__(-0.0)
+	mov al,__float8__(1.83203125)
+	mov al,__float8__(+1.83203125)
+	mov al,__float8__(-1.83203125)
+	mov al,__float8__(1.83203125e1)
+	mov al,__float8__(+1.83203125e1)
+	mov al,__float8__(-1.83203125e1)
+	mov al,__float8__(1.83203125e-1)
+	mov al,__float8__(+1.83203125e-1)
+	mov al,__float8__(-1.83203125e-1)
+	mov al,__float8__(1.13203125e-2)		; Denormal!
+	mov al,__float8__(+1.13203125e-2)		; Denormal!
+	mov al,__float8__(-1.13203125e-2)		; Denormal!
+	mov al,__float8__(__Infinity__)
+	mov al,__float8__(+__Infinity__)
+	mov al,__float8__(-__Infinity__)
+	mov al,__float8__(__NaN__)
+	mov al,__float8__(__QNaN__)
+	mov al,__float8__(__SNaN__)
+
 ; 16-bit
 	mov ax,__float16__(1.0)
 	mov ax,__float16__(+1.0)
-- 
cgit v1.2.1